mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
21689 lines
681 KiB
Text
21689 lines
681 KiB
Text
set @@join_buffer_size=256*1024;
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create table t1 (a int, b int, c int);
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create table t2 (a int, b int, c int, d decimal);
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insert into t1 values
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(1,21,345), (1,33,7), (8,33,114), (1,21,500), (1,19,107), (5,14,787),
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(8,33,123), (9,10,211), (5,16,207), (1,33,988), (5,27,132), (1,21,104),
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(6,20,309), (6,20,315), (1,21,101), (8,33,404), (9,10,800), (1,21,123),
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(7,11,708), (6,20,214);
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insert into t2 values
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(2,3,207,207.0000), (1,21,909,12.0000), (7,13,312,406.0000),
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(8,64,248,107.0000), (6,20,315,279.3333), (1,19,203,107.0000),
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(8,80,800,314.0000), (3,12,231,190.0000), (6,23,303,909.0000);
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Warnings:
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Note 1265 Data truncated for column 'd' at row 5
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create table t1_double(a int, b double, c double);
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insert into t1_double values
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(1,23.4,14.3333), (1,12.5,18.9), (3,12.5,18.9),
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(4,33.4,14.3333), (4,14.3333,13.65), (5,17.89,7.22),
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(6,33.4,14.3), (10,33.4,13.65), (11,33.4,13.65);
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create table t2_double(a int, b double, c double);
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insert into t2_double values
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(1,22.4,14.3333), (1,12.5,18.9), (2,22.4,18.9),
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(4,33.4,14.3333), (5,22.4,13.65), (7,17.89,18.9),
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(6,33.4,14.3333), (10,31.4,13.65), (12,33.4,13.65);
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create table t1_char(a char, b char(8), c int);
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insert into t1_char values
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('a','Ivan',1), ('b','Vika',2), ('b','Inga',6), ('c','Vika',7),
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('b','Ivan',7), ('a','Alex',6), ('b','Inga',5), ('d','Ron',9),
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('d','Harry',2), ('d','Hermione',3), ('c','Ivan',3), ('c','Harry',4);
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create table t2_char(a char, b char(8), c int);
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insert into t2_char values
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('b','Ivan',1), ('c','Vinny',3), ('c','Inga',9), ('a','Vika',1),
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('c','Ivan',2), ('b','Ali',6), ('c','Inga',2), ('a','Ron',9),
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('d','Harry',1), ('b','Hermes',3), ('b','Ivan',11), ('b','Harry',4);
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create table t1_decimal (a decimal(3,1), b decimal(3,1), c int);
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insert into t1_decimal values
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(1,1,23),(2,2,11),(3,3,16),
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(1,1,12),(1,1,14),(2,3,15),
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(2,1,13),(2,3,11),(3,3,16);
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create table t2_decimal (a decimal(3,1), b decimal(3,1), c int);
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insert into t2_decimal values
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(2,1,13),(2,2,11),(3,3,16),
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(1,3,22),(1,3,14),(2,2,15),
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(2,1,43),(2,3,11),(2,3,16);
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create view v1 as select a, b, max(c) as max_c, avg(c) as avg_c from t1
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group by a,b having max_c < 707;
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create view v2 as select a, b, max(c) as max_c, avg(c) as avg_c from t1
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where t1.a>5 group by a,b having max_c < 707;
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create view v3 as select a, b, min(c) as min_c from t1
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where t1.a<10 group by a,b having min_c > 109;
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create view v4 as
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select a, b, min(max_c) as min_c from v1
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where (v1.a<15) group by a,b;
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create view v_union as
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select a, b, min(c) as c from t1
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where t1.a<10 group by a,b having c > 109
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union
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select a, b, max(c) as c from t1
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where t1.b>10 group by a,b having c < 300;
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create view v2_union as
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select a, b, min(c) as c from t1
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where t1.a<10 group by a,b having c > 109
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union
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select a, b, max(c) as c from t1
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where t1.b>10 group by a,b having c < 300
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union
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select a, b, avg(c) as c from t1
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where t1.c>300 group by a,b having c < 707;
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create view v3_union as
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select a, b, (a+1) as c from t1
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where t1.a<10
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union
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select a, b, c from t1
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where t1.b>10 and t1.c>100;
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create view v4_union as
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select a, b, max(c)-100 as c from t1
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where t1.a<10 group by a,b having c > 109
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union
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select a, b, (c+100) as c from t1
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where t1.b>10;
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create view v_double as
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select a, avg(a/4) as avg_a, b, c from t1_double
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where (b>12.2) group by b,c having (avg_a<22.333);
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create view v_char as
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select a, b, max(c) as max_c from t1_char
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group by a,b having max_c < 9;
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create view v_decimal as
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select a, b, avg(c) as avg_c from t1_decimal
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group by a,b having (avg_c>12);
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# conjunctive subformula : pushing into HAVING
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set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
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a b max_c avg_c a b c d
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1 21 500 234.6000 2 3 207 207
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1 21 500 234.6000 7 13 312 406
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1 21 500 234.6000 8 64 248 107
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1 21 500 234.6000 6 20 315 279
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1 21 500 234.6000 8 80 800 314
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1 21 500 234.6000 3 12 231 190
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1 21 500 234.6000 6 23 303 909
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6 20 315 279.3333 7 13 312 406
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6 20 315 279.3333 8 64 248 107
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6 20 315 279.3333 8 80 800 314
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select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
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a b max_c avg_c a b c d
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1 21 500 234.6000 2 3 207 207
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1 21 500 234.6000 7 13 312 406
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1 21 500 234.6000 8 64 248 107
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1 21 500 234.6000 6 20 315 279
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1 21 500 234.6000 8 80 800 314
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1 21 500 234.6000 3 12 231 190
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1 21 500 234.6000 6 23 303 909
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6 20 315 279.3333 7 13 312 406
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6 20 315 279.3333 8 64 248 107
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6 20 315 279.3333 8 80 800 314
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explain select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
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2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
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explain format=json select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"nested_loop": [
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{
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"table": {
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"table_name": "t2",
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"access_type": "ALL",
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"rows": 9,
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"filtered": 100
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}
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},
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{
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"block-nl-join": {
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"table": {
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"table_name": "<derived2>",
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"access_type": "ALL",
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"rows": 20,
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"filtered": 100,
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"attached_condition": "v1.max_c > 214"
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},
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"buffer_type": "flat",
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"buffer_size": "238",
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"join_type": "BNL",
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"attached_condition": "t2.a > v1.a",
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"materialized": {
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"query_block": {
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"select_id": 2,
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"having_condition": "max_c < 707 and max_c > 214",
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"filesort": {
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"sort_key": "t1.a, t1.b",
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"temporary_table": {
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"nested_loop": [
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{
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"table": {
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"table_name": "t1",
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"access_type": "ALL",
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"rows": 20,
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"filtered": 100
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}
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}
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]
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}
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}
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}
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}
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}
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}
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]
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}
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}
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set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
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(select a, b, max(c) as max_c, avg(c) as avg_c from t1
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group by a,b having max_c < 707) v1,
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t2 where (v1.a=t2.a) and (v1.max_c>300);
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a b max_c avg_c a b c d
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1 21 500 234.6000 1 21 909 12
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8 33 404 213.6667 8 64 248 107
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6 20 315 279.3333 6 20 315 279
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1 21 500 234.6000 1 19 203 107
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8 33 404 213.6667 8 80 800 314
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6 20 315 279.3333 6 23 303 909
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select * from
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(select a, b, max(c) as max_c, avg(c) as avg_c from t1
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group by a,b having max_c < 707) v1,
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t2 where (v1.a=t2.a) and (v1.max_c>300);
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a b max_c avg_c a b c d
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1 21 500 234.6000 1 21 909 12
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8 33 404 213.6667 8 64 248 107
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6 20 315 279.3333 6 20 315 279
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1 21 500 234.6000 1 19 203 107
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8 33 404 213.6667 8 80 800 314
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6 20 315 279.3333 6 23 303 909
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explain select * from
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(select a, b, max(c) as max_c, avg(c) as avg_c from t1
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group by a,b having max_c < 707) v1,
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t2 where (v1.a=t2.a) and (v1.max_c>300);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
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2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
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explain format=json select * from
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(select a, b, max(c) as max_c, avg(c) as avg_c from t1
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group by a,b having max_c < 707) v1,
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t2 where (v1.a=t2.a) and (v1.max_c>300);
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"nested_loop": [
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{
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"table": {
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"table_name": "t2",
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"access_type": "ALL",
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"rows": 9,
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"filtered": 100,
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"attached_condition": "t2.a is not null"
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}
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},
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{
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"table": {
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"table_name": "<derived2>",
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"access_type": "ref",
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"possible_keys": ["key0"],
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"key": "key0",
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"key_length": "5",
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"used_key_parts": ["a"],
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"ref": ["test.t2.a"],
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"rows": 2,
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"filtered": 100,
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"attached_condition": "v1.max_c > 300",
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"materialized": {
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"query_block": {
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"select_id": 2,
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"having_condition": "max_c < 707 and max_c > 300",
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"filesort": {
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"sort_key": "t1.a, t1.b",
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"temporary_table": {
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"nested_loop": [
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{
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"table": {
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"table_name": "t1",
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"access_type": "ALL",
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"rows": 20,
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"filtered": 100
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}
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}
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]
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}
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}
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}
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}
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}
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}
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]
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}
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}
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# extracted or formula : pushing into HAVING
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set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
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((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
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a b max_c avg_c a b c d
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1 21 500 234.6000 2 3 207 207
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1 21 500 234.6000 7 13 312 406
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1 21 500 234.6000 8 64 248 107
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1 21 500 234.6000 6 20 315 279
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1 21 500 234.6000 8 80 800 314
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|
1 21 500 234.6000 3 12 231 190
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1 21 500 234.6000 6 23 303 909
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5 27 132 132.0000 2 3 207 207
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5 27 132 132.0000 1 21 909 12
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5 27 132 132.0000 1 19 203 107
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5 27 132 132.0000 3 12 231 190
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select * from v1,t2 where
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((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
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a b max_c avg_c a b c d
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1 21 500 234.6000 2 3 207 207
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1 21 500 234.6000 7 13 312 406
|
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1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
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1 21 500 234.6000 6 23 303 909
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5 27 132 132.0000 2 3 207 207
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5 27 132 132.0000 1 21 909 12
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5 27 132 132.0000 1 19 203 107
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5 27 132 132.0000 3 12 231 190
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explain select * from v1,t2 where
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((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
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2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
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explain format=json select * from v1,t2 where
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((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"nested_loop": [
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{
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"table": {
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"table_name": "t2",
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"access_type": "ALL",
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"rows": 9,
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"filtered": 100
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}
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},
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|
{
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"block-nl-join": {
|
|
"table": {
|
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"table_name": "<derived2>",
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"access_type": "ALL",
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|
"rows": 20,
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|
"filtered": 100,
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"attached_condition": "v1.max_c > 400 or v1.max_c < 135"
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},
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"buffer_type": "flat",
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"buffer_size": "238",
|
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"join_type": "BNL",
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"attached_condition": "v1.max_c > 400 and t2.a > v1.a or v1.max_c < 135 and t2.a < v1.a",
|
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"materialized": {
|
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"query_block": {
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"select_id": 2,
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"having_condition": "max_c < 707 and (max_c > 400 or max_c < 135)",
|
|
"filesort": {
|
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"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
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|
}
|
|
}
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|
]
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|
}
|
|
}
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|
}
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}
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}
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}
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]
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}
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}
|
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set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
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((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or
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((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
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a b max_c avg_c a b c d
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1 19 107 107.0000 1 21 909 12
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1 19 107 107.0000 1 19 203 107
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1 21 500 234.6000 1 21 909 12
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6 20 315 279.3333 6 20 315 279
|
|
select * from v1,t2 where
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((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or
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((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
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|
a b max_c avg_c a b c d
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|
1 19 107 107.0000 1 21 909 12
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1 19 107 107.0000 1 19 203 107
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1 21 500 234.6000 1 21 909 12
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6 20 315 279.3333 6 20 315 279
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|
explain select * from v1,t2 where
|
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((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or
|
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((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
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((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or
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((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 300 or v1.max_c < 135"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.b = t2.b and v1.max_c > 300 and v1.avg_c > t2.d or v1.a = t2.a and v1.max_c < 135 and v1.max_c < t2.c",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (max_c > 300 or max_c < 135)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
|
|
a b max_c avg_c a b c d
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
|
|
a b max_c avg_c a b c d
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
explain select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 6"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.b > v1.b",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
|
|
a b max_c avg_c a b c d
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
|
|
a b max_c avg_c a b c d
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.b > 25"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.a < v2.a",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b > 25"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 2 3 207 207
|
|
1 19 107 107.0000 7 13 312 406
|
|
1 19 107 107.0000 3 12 231 190
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 21 500 234.6000 3 12 231 190
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v1,t2 where
|
|
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 2 3 207 207
|
|
1 19 107 107.0000 7 13 312 406
|
|
1 19 107 107.0000 3 12 231 190
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 21 500 234.6000 3 12 231 190
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,t2 where
|
|
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 7 or v1.a < 2"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a > 7 and t2.c < v1.max_c or v1.a < 2 and t2.b < v1.b",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 7 or t1.a < 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2,t2 where
|
|
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
|
|
a b max_c avg_c a b c d
|
|
6 20 315 279.3333 2 3 207 207
|
|
6 20 315 279.3333 7 13 312 406
|
|
6 20 315 279.3333 1 19 203 107
|
|
6 20 315 279.3333 3 12 231 190
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v2,t2 where
|
|
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
|
|
a b max_c avg_c a b c d
|
|
6 20 315 279.3333 2 3 207 207
|
|
6 20 315 279.3333 7 13 312 406
|
|
6 20 315 279.3333 1 19 203 107
|
|
6 20 315 279.3333 3 12 231 190
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v2,t2 where
|
|
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v2,t2 where
|
|
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.a > 7 or v2.a > 5"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v2.a > 7 and t2.c < v2.max_c or v2.a > 5 and t2.b < v2.b",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and (t1.a > 7 or t1.a > 5)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or
|
|
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 8 64 248 107
|
|
1 19 107 107.0000 1 19 203 107
|
|
5 16 207 207.0000 2 3 207 207
|
|
select * from v1,t2 where
|
|
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or
|
|
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 8 64 248 107
|
|
1 19 107 107.0000 1 19 203 107
|
|
5 16 207 207.0000 2 3 207 207
|
|
explain select * from v1,t2 where
|
|
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or
|
|
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or
|
|
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 4 or v1.a < 2"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a > 4 and v1.b > t2.b and v1.max_c = t2.d or v1.a < 2 and v1.max_c < t2.c and v1.max_c = t2.d",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 4 or t1.a < 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformulas : pushing into HAVING and WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 6 23 303 909
|
|
select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 6 23 303 909
|
|
explain select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 2 and v1.max_c > 400"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.b > v1.b",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 400",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_double as v,t2_double as t where
|
|
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
|
|
a avg_a b c a b c
|
|
1 0.50000000 12.5 18.9 1 22.4 14.3333
|
|
1 0.50000000 12.5 18.9 1 12.5 18.9
|
|
4 1.00000000 33.4 14.3333 4 33.4 14.3333
|
|
4 1.00000000 14.3333 13.65 4 33.4 14.3333
|
|
5 1.25000000 17.89 7.22 5 22.4 13.65
|
|
6 1.50000000 33.4 14.3 6 33.4 14.3333
|
|
10 2.62500000 33.4 13.65 10 31.4 13.65
|
|
select * from v_double as v,t2_double as t where
|
|
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
|
|
a avg_a b c a b c
|
|
1 0.50000000 12.5 18.9 1 22.4 14.3333
|
|
1 0.50000000 12.5 18.9 1 12.5 18.9
|
|
4 1.00000000 33.4 14.3333 4 33.4 14.3333
|
|
4 1.00000000 14.3333 13.65 4 33.4 14.3333
|
|
5 1.25000000 17.89 7.22 5 22.4 13.65
|
|
6 1.50000000 33.4 14.3 6 33.4 14.3333
|
|
10 2.62500000 33.4 13.65 10 31.4 13.65
|
|
explain select * from v_double as v,t2_double as t where
|
|
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t.a 2 Using where
|
|
2 DERIVED t1_double ALL NULL NULL NULL NULL 9 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_double as v,t2_double as t where
|
|
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v.avg_a > 0.45 and v.b > 10",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "avg_a < 22.333 and avg_a > 0.45",
|
|
"filesort": {
|
|
"sort_key": "t1_double.b, t1_double.c",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_double",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_double.b > 12.2 and t1_double.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
|
|
a b avg_c a b c
|
|
3.0 3.0 16.0000 3.0 3.0 16
|
|
select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
|
|
a b avg_c a b c
|
|
3.0 3.0 16.0000 3.0 3.0 16
|
|
explain select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 3 test.t.a 2 Using where
|
|
2 DERIVED t1_decimal ALL NULL NULL NULL NULL 9 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "3",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v.avg_c > 15 and v.b > 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "avg_c > 12 and avg_c > 15",
|
|
"filesort": {
|
|
"sort_key": "t1_decimal.a, t1_decimal.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_decimal",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_decimal.b > 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formula : pushing into HAVING and WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or
|
|
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 2 3 207 207
|
|
1 19 107 107.0000 7 13 312 406
|
|
1 19 107 107.0000 3 12 231 190
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v1,t2 where
|
|
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or
|
|
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 2 3 207 207
|
|
1 19 107 107.0000 7 13 312 406
|
|
1 19 107 107.0000 3 12 231 190
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,t2 where
|
|
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or
|
|
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or
|
|
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 7 and v1.max_c > 300 or v1.a < 4 and v1.max_c < 500"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a > 7 and v1.max_c > 300 and t2.c < v1.max_c or v1.a < 4 and v1.max_c < 500 and t2.b < v1.b",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (t1.a > 7 and max_c > 300 or t1.a < 4 and max_c < 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 7 or t1.a < 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 2 and v1.max_c > 120 or v1.a > 7"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a < 2 and v1.max_c > 120 or v1.a > 7",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (t1.a < 2 and max_c > 120 or t1.a > 7)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 2 or t1.a > 7"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formulas : pushing into WHERE and HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 2 and v1.max_c > 120 or v1.a > 7"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.b = t2.b and v1.a < 2 and v1.max_c > 120 or v1.a > 7",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (t1.a < 2 and max_c > 120 or t1.a > 7)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 2 or t1.a > 7"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
|
|
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 8 64 248 107
|
|
1 19 107 107.0000 1 19 203 107
|
|
5 16 207 207.0000 2 3 207 207
|
|
select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
|
|
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 8 64 248 107
|
|
1 19 107 107.0000 1 19 203 107
|
|
5 16 207 207.0000 2 3 207 207
|
|
explain select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
|
|
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
|
|
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 2 and v1.max_c < 200 or v1.a > 4"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a < 2 and v1.max_c < 200 and t2.c > v1.max_c and v1.max_c = t2.d or v1.max_c = t2.c and v1.a > 4 and t2.c < 500 and t2.b < v1.b",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (t1.a < 2 and max_c < 200 or t1.a > 4 and max_c < 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 2 or t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# prepare of a query containing extracted or formula
|
|
prepare stmt from "select * from v1,t2 where
|
|
((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));";
|
|
execute stmt;
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
5 27 132 132.0000 2 3 207 207
|
|
5 27 132 132.0000 1 21 909 12
|
|
5 27 132 132.0000 1 19 203 107
|
|
5 27 132 132.0000 3 12 231 190
|
|
execute stmt;
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
5 27 132 132.0000 2 3 207 207
|
|
5 27 132 132.0000 1 21 909 12
|
|
5 27 132 132.0000 1 19 203 107
|
|
5 27 132 132.0000 3 12 231 190
|
|
deallocate prepare stmt;
|
|
prepare stmt from
|
|
"explain format=json select * from v1,t2 where
|
|
((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));";
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 400 or v1.max_c < 135"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.max_c > 400 and t2.a > v1.a or v1.max_c < 135 and t2.a < v1.a",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (max_c > 400 or max_c < 135)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 400 or v1.max_c < 135"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.max_c > 400 and t2.a > v1.a or v1.max_c < 135 and t2.a < v1.a",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (max_c > 400 or max_c < 135)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
deallocate prepare stmt;
|
|
# conjunctive subformula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
explain select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 1 and t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
|
|
a b max_c avg_c a b c d
|
|
5 16 207 207.0000 2 3 207 207
|
|
select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
|
|
a b max_c avg_c a b c d
|
|
5 16 207 207.0000 2 3 207 207
|
|
explain select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.d 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.d is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["max_c"],
|
|
"ref": ["test.t2.d"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 5 and v1.max_c = t2.d",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformula : pushing into WHERE using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 19 107 107.0000 1 19 203 107
|
|
select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 19 107 107.0000 1 19 203 107
|
|
explain select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
|
|
a b max_c avg_c a b c d
|
|
select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
|
|
a b max_c avg_c a b c d
|
|
explain select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 10 test.t2.a,test.t2.a 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "10",
|
|
"used_key_parts": ["a", "b"],
|
|
"ref": ["test.t2.a", "test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = t1.a"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformula : pushing into HAVING using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
|
|
a b max_c avg_c a b c d
|
|
5 16 207 207.0000 2 3 207 207
|
|
6 20 315 279.3333 6 20 315 279
|
|
select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
|
|
a b max_c avg_c a b c d
|
|
5 16 207 207.0000 2 3 207 207
|
|
6 20 315 279.3333 6 20 315 279
|
|
explain select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c > 150 and t2.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["max_c"],
|
|
"ref": ["test.t2.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 150",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted and formula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
|
|
a b max_c avg_c a b c d
|
|
select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
|
|
a b max_c avg_c a b c d
|
|
explain select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where
|
|
explain format=json select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 3"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 3 and v1.b = 3"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 3 and t1.b = 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 2 3 207 207
|
|
select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 2 3 207 207
|
|
explain select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where
|
|
explain format=json select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 2"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1 and v1.b = 21"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 and t1.b = 21"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_char as v,t2_char as t where
|
|
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
|
|
a b max_c a b c
|
|
c Harry 4 d Harry 1
|
|
c Harry 4 b Harry 4
|
|
select * from v_char as v,t2_char as t where
|
|
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
|
|
a b max_c a b c
|
|
c Harry 4 d Harry 1
|
|
c Harry 4 b Harry 4
|
|
explain select * from v_char as v,t2_char as t where
|
|
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 12 Using where
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1_char ALL NULL NULL NULL NULL 12 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_char as v,t2_char as t where
|
|
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "v.a = 'c' and v.b < 'Hermes'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 9",
|
|
"filesort": {
|
|
"sort_key": "t1_char.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_char",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_char.a = 'c' and t1_char.b < 'Hermes'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "220",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t.b = v.b or v.max_c > 20"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted and formula : pushing into WHERE using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
|
|
a b avg_c a b c
|
|
1.0 1.0 16.3333 2.0 1.0 13
|
|
3.0 3.0 16.0000 3.0 3.0 16
|
|
3.0 3.0 16.0000 1.0 3.0 22
|
|
3.0 3.0 16.0000 1.0 3.0 14
|
|
1.0 1.0 16.3333 2.0 1.0 43
|
|
3.0 3.0 16.0000 2.0 3.0 11
|
|
3.0 3.0 16.0000 2.0 3.0 16
|
|
select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
|
|
a b avg_c a b c
|
|
1.0 1.0 16.3333 2.0 1.0 13
|
|
3.0 3.0 16.0000 3.0 3.0 16
|
|
3.0 3.0 16.0000 1.0 3.0 22
|
|
3.0 3.0 16.0000 1.0 3.0 14
|
|
1.0 1.0 16.3333 2.0 1.0 43
|
|
3.0 3.0 16.0000 2.0 3.0 11
|
|
3.0 3.0 16.0000 2.0 3.0 16
|
|
explain select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 6 test.t.b,test.t.b 2
|
|
2 DERIVED t1_decimal ALL NULL NULL NULL NULL 9 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_decimal as v,t2_decimal as t where
|
|
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "(t.b > 1 or t.b = 1) and t.b is not null and t.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "6",
|
|
"used_key_parts": ["a", "b"],
|
|
"ref": ["test.t.b", "test.t.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "avg_c > 12",
|
|
"filesort": {
|
|
"sort_key": "t1_decimal.a, t1_decimal.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_decimal",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_decimal.b = t1_decimal.a and (t1_decimal.a > 1 or t1_decimal.a = 1)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formula : pushing into HAVING using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2
|
|
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
5 16 207 207.0000 2 3 207 207
|
|
6 20 315 279.3333 6 20 315 279
|
|
select * from v1,t2
|
|
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
5 16 207 207.0000 2 3 207 207
|
|
6 20 315 279.3333 6 20 315 279
|
|
explain select * from v1,t2
|
|
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2
|
|
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 4 or t2.c > 150"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a = t2.a and t2.a < 4 or v1.max_c = t2.c and t2.c > 150",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (t1.a < 4 or max_c > 150)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformulas : pushing into WHERE and HAVING using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2
|
|
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
|
|
a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279
|
|
select * from v1,t2
|
|
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
|
|
a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279
|
|
explain select * from v1,t2
|
|
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 10 test.t2.a,test.t2.c 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2
|
|
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 5 and t2.c > 250 and t2.a is not null and t2.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "10",
|
|
"used_key_parts": ["a", "max_c"],
|
|
"ref": ["test.t2.a", "test.t2.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 250",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
|
|
a b max_c avg_c a b c d
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
|
|
a b max_c avg_c a b c d
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
explain select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 8"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 8 and v1.max_c = 404"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c = 404",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 8"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
|
|
a b max_c avg_c a b c d
|
|
5 16 207 207.0000 2 3 207 207
|
|
select * from v1,t2 where
|
|
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
|
|
a b max_c avg_c a b c d
|
|
5 16 207 207.0000 2 3 207 207
|
|
explain select * from v1,t2 where
|
|
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.d 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.d is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["max_c"],
|
|
"ref": ["test.t2.d"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 3 and v1.max_c > 200 and t2.b < v1.b and t2.d = v1.max_c",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_double as v,t2_double as t where
|
|
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
|
|
a avg_a b c a b c
|
|
select * from v_double as v,t2_double as t where
|
|
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
|
|
a avg_a b c a b c
|
|
explain select * from v_double as v,t2_double as t where
|
|
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 18 test.t.c,test.t.c 2 Using where
|
|
2 DERIVED t1_double ALL NULL NULL NULL NULL 9 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_double as v,t2_double as t where
|
|
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t.c is not null and t.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "18",
|
|
"used_key_parts": ["b", "c"],
|
|
"ref": ["test.t.c", "test.t.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t.c > 10 or v.a = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "avg_a < 22.333 and (t1_double.b > 10 or t1_double.a = 1)",
|
|
"filesort": {
|
|
"sort_key": "t1_double.b, t1_double.c",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_double",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_double.c = t1_double.b and t1_double.b > 12.2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# conjunctive subformula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_double as v,t2_double as t where
|
|
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
|
|
a avg_a b c a b c
|
|
1 0.50000000 12.5 18.9 1 12.5 18.9
|
|
1 0.50000000 12.5 18.9 2 22.4 18.9
|
|
1 0.50000000 12.5 18.9 7 17.89 18.9
|
|
select * from v_double as v,t2_double as t where
|
|
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
|
|
a avg_a b c a b c
|
|
1 0.50000000 12.5 18.9 1 12.5 18.9
|
|
1 0.50000000 12.5 18.9 2 22.4 18.9
|
|
1 0.50000000 12.5 18.9 7 17.89 18.9
|
|
explain select * from v_double as v,t2_double as t where
|
|
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 9 test.t.c 2 Using where
|
|
2 DERIVED t1_double ALL NULL NULL NULL NULL 9 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_double as v,t2_double as t where
|
|
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t.c > 18 and t.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "9",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v.a > 0.2 or v.b < 17 or t.c > 17",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "avg_a < 22.333 and (t1_double.a > 0.2 or t1_double.b < 17 or t1_double.c > 17)",
|
|
"filesort": {
|
|
"sort_key": "t1_double.b, t1_double.c",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_double",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_double.b > 12.2 and t1_double.c > 18"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_decimal as v,t2_decimal as t where
|
|
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
|
|
a b avg_c a b c
|
|
2.0 1.0 13.0000 2.0 1.0 13
|
|
2.0 3.0 13.0000 2.0 1.0 13
|
|
2.0 1.0 13.0000 2.0 2.0 11
|
|
2.0 3.0 13.0000 2.0 2.0 11
|
|
2.0 1.0 13.0000 3.0 3.0 16
|
|
2.0 3.0 13.0000 3.0 3.0 16
|
|
2.0 1.0 13.0000 1.0 3.0 22
|
|
2.0 3.0 13.0000 1.0 3.0 22
|
|
2.0 1.0 13.0000 1.0 3.0 14
|
|
2.0 3.0 13.0000 1.0 3.0 14
|
|
2.0 1.0 13.0000 2.0 2.0 15
|
|
2.0 3.0 13.0000 2.0 2.0 15
|
|
2.0 1.0 13.0000 2.0 1.0 43
|
|
2.0 3.0 13.0000 2.0 1.0 43
|
|
2.0 1.0 13.0000 2.0 3.0 11
|
|
2.0 3.0 13.0000 2.0 3.0 11
|
|
2.0 1.0 13.0000 2.0 3.0 16
|
|
2.0 3.0 13.0000 2.0 3.0 16
|
|
select * from v_decimal as v,t2_decimal as t where
|
|
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
|
|
a b avg_c a b c
|
|
2.0 1.0 13.0000 2.0 1.0 13
|
|
2.0 3.0 13.0000 2.0 1.0 13
|
|
2.0 1.0 13.0000 2.0 2.0 11
|
|
2.0 3.0 13.0000 2.0 2.0 11
|
|
2.0 1.0 13.0000 3.0 3.0 16
|
|
2.0 3.0 13.0000 3.0 3.0 16
|
|
2.0 1.0 13.0000 1.0 3.0 22
|
|
2.0 3.0 13.0000 1.0 3.0 22
|
|
2.0 1.0 13.0000 1.0 3.0 14
|
|
2.0 3.0 13.0000 1.0 3.0 14
|
|
2.0 1.0 13.0000 2.0 2.0 15
|
|
2.0 3.0 13.0000 2.0 2.0 15
|
|
2.0 1.0 13.0000 2.0 1.0 43
|
|
2.0 3.0 13.0000 2.0 1.0 43
|
|
2.0 1.0 13.0000 2.0 3.0 11
|
|
2.0 3.0 13.0000 2.0 3.0 11
|
|
2.0 1.0 13.0000 2.0 3.0 16
|
|
2.0 3.0 13.0000 2.0 3.0 16
|
|
explain select * from v_decimal as v,t2_decimal as t where
|
|
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 9 Using join buffer (flat, BNL join)
|
|
2 DERIVED t1_decimal ALL NULL NULL NULL NULL 9 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_decimal as v,t2_decimal as t where
|
|
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "(v.a > 4 or v.a = 2 or v.b > 3) and v.avg_c = 13",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "avg_c > 12 and avg_c = 13",
|
|
"filesort": {
|
|
"sort_key": "t1_decimal.a, t1_decimal.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_decimal",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_decimal.a > 4 or t1_decimal.a = 2 or t1_decimal.b > 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "162",
|
|
"join_type": "BNL"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
|
|
a b max_c avg_c a b c d
|
|
select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
|
|
a b max_c avg_c a b c d
|
|
explain select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 10 test.t2.a,test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "10",
|
|
"used_key_parts": ["a", "b"],
|
|
"ref": ["test.t2.a", "test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 300",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = t1.a and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# nothing to push
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.a<2) and (t2.c>900);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 21 500 234.6000 1 21 909 12
|
|
5 16 207 207.0000 1 21 909 12
|
|
5 27 132 132.0000 1 21 909 12
|
|
6 20 315 279.3333 1 21 909 12
|
|
8 33 404 213.6667 1 21 909 12
|
|
select * from v1,t2 where (t2.a<2) and (t2.c>900);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 21 500 234.6000 1 21 909 12
|
|
5 16 207 207.0000 1 21 909 12
|
|
5 27 132 132.0000 1 21 909 12
|
|
6 20 315 279.3333 1 21 909 12
|
|
8 33 404 213.6667 1 21 909 12
|
|
explain select * from v1,t2 where (t2.a<2) and (t2.c>900);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (t2.a<2) and (t2.c>900);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 2 and t2.c > 900"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
6 20 315 279.3333 6 20 315 279
|
|
1 19 107 107.0000 1 19 203 107
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
6 20 315 279.3333 6 20 315 279
|
|
1 19 107 107.0000 1 19 203 107
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 10 test.t2.a,test.t2.b 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null and t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "10",
|
|
"used_key_parts": ["a", "b"],
|
|
"ref": ["test.t2.a", "test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
select * from v1,t2 where
|
|
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
explain select * from v1,t2 where
|
|
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a = t2.a or v1.b = t2.b and (v1.a = 1 or v1.a = 6)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 2 3 207 207
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 7 13 312 406
|
|
1 19 107 107.0000 8 64 248 107
|
|
1 19 107 107.0000 6 20 315 279
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 19 107 107.0000 8 80 800 314
|
|
1 19 107 107.0000 3 12 231 190
|
|
1 19 107 107.0000 6 23 303 909
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
5 16 207 207.0000 2 3 207 207
|
|
5 27 132 132.0000 2 3 207 207
|
|
6 20 315 279.3333 2 3 207 207
|
|
8 33 404 213.6667 2 3 207 207
|
|
select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 2 3 207 207
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 7 13 312 406
|
|
1 19 107 107.0000 8 64 248 107
|
|
1 19 107 107.0000 6 20 315 279
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 19 107 107.0000 8 80 800 314
|
|
1 19 107 107.0000 3 12 231 190
|
|
1 19 107 107.0000 6 23 303 909
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 1 19 203 107
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
5 16 207 207.0000 2 3 207 207
|
|
5 27 132 132.0000 2 3 207 207
|
|
6 20 315 279.3333 2 3 207 207
|
|
8 33 404 213.6667 2 3 207 207
|
|
explain select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a = 1 or v1.b = 21 or t2.a = 2",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 21 500 234.6000 1 21 909 12
|
|
5 16 207 207.0000 1 21 909 12
|
|
5 27 132 132.0000 1 21 909 12
|
|
6 20 315 279.3333 1 21 909 12
|
|
8 33 404 213.6667 1 21 909 12
|
|
select * from v1,t2 where
|
|
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 21 500 234.6000 1 21 909 12
|
|
5 16 207 207.0000 1 21 909 12
|
|
5 27 132 132.0000 1 21 909 12
|
|
6 20 315 279.3333 1 21 909 12
|
|
8 33 404 213.6667 1 21 909 12
|
|
explain select * from v1,t2 where
|
|
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,t2 where
|
|
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 2 and t2.c > 900"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a < t2.a or t2.a < 11",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : nothing to push
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where
|
|
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
8 33 404 213.6667 8 33 404 213.6667 8 64 248 107
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 315 279
|
|
8 33 404 213.6667 8 33 404 213.6667 8 80 800 314
|
|
6 20 315 279.3333 6 20 315 279.3333 6 23 303 909
|
|
select * from v1,v2,t2 where
|
|
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
8 33 404 213.6667 8 33 404 213.6667 8 64 248 107
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 315 279
|
|
8 33 404 213.6667 8 33 404 213.6667 8 80 800 314
|
|
6 20 315 279.3333 6 20 315 279.3333 6 23 303 909
|
|
explain select * from v1,v2,t2 where
|
|
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key1 key1 5 test.t2.a 2
|
|
1 PRIMARY <derived3> ref key0 key0 5 test.t2.a 2 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,t2 where
|
|
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key1"],
|
|
"key": "key1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.b < 50",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b < 50"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279.3333 2 3 207 207
|
|
6 20 315 279.3333 6 20 315 279.3333 1 21 909 12
|
|
6 20 315 279.3333 6 20 315 279.3333 7 13 312 406
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 20 315 279.3333 1 19 203 107
|
|
6 20 315 279.3333 6 20 315 279.3333 3 12 231 190
|
|
6 20 315 279.3333 6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 8 33 404 213.6667 6 23 303 909
|
|
select * from v1,v2,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279.3333 2 3 207 207
|
|
6 20 315 279.3333 6 20 315 279.3333 1 21 909 12
|
|
6 20 315 279.3333 6 20 315 279.3333 7 13 312 406
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 20 315 279.3333 1 19 203 107
|
|
6 20 315 279.3333 6 20 315 279.3333 3 12 231 190
|
|
6 20 315 279.3333 6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,v2,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived3> ref key0 key0 5 v1.b 2 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b < 50"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.b is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["v1.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.a = v1.a or v1.a = t2.a",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where
|
|
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 33 404 213.6667 8 80 800 314
|
|
select * from v1,v2,t2 where
|
|
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 8 33 404 213.6667 8 80 800 314
|
|
explain select * from v1,v2,t2 where
|
|
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (incremental, BNL join)
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,t2 where
|
|
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a = t2.a or t2.c < 115",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "incremental",
|
|
"buffer_size": "4Kb",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a = t2.a and v2.a = t2.a or v2.b > 13 and t2.c < 115",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : pushing in all tables
|
|
# conjunctive subformula : pushing into HAVING
|
|
# extracted or formula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and
|
|
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
1 19 107 107.0000 6 20 315 279.3333 1 21 909 12
|
|
1 19 107 107.0000 6 20 315 279.3333 1 19 203 107
|
|
1 19 107 107.0000 8 33 404 213.6667 1 21 909 12
|
|
1 19 107 107.0000 8 33 404 213.6667 1 19 203 107
|
|
select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and
|
|
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
1 19 107 107.0000 6 20 315 279.3333 1 21 909 12
|
|
1 19 107 107.0000 6 20 315 279.3333 1 19 203 107
|
|
1 19 107 107.0000 8 33 404 213.6667 1 21 909 12
|
|
1 19 107 107.0000 8 33 404 213.6667 1 19 203 107
|
|
explain select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and
|
|
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (incremental, BNL join)
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and
|
|
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c < 300"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.b < 50 or v2.b = 19"
|
|
},
|
|
"buffer_type": "incremental",
|
|
"buffer_size": "4Kb",
|
|
"join_type": "BNL",
|
|
"attached_condition": "(v2.a = v1.a or v1.a = t2.a) and (v2.b < 50 or v2.b = 19)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and (t1.b < 50 or t1.b = 19)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : pushing only in one table
|
|
# conjunctive subformula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where
|
|
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
select * from v1,v2,t2 where
|
|
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
explain select * from v1,v2,t2 where
|
|
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key1 key1 10 test.t2.a,test.t2.a 2
|
|
1 PRIMARY <derived3> ref key0 key0 5 test.t2.a 2 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,t2 where
|
|
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null and t2.a is not null and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key1"],
|
|
"key": "key1",
|
|
"key_length": "10",
|
|
"used_key_parts": ["a", "b"],
|
|
"ref": ["test.t2.a", "test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = t1.a"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.max_c < 300",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707 and max_c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : pushing only in one table
|
|
# extracted and formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into WHERE using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
|
|
a b max_c avg_c a b max_c avg_c a b c d
|
|
explain select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived3> ref key0 key0 5 v1.b 2
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1 and v1.b > 10"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.b is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["v1.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into WHERE using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
|
|
a b max_c a b c
|
|
b Vika 2 b Ivan 1
|
|
b Vika 2 b Ali 6
|
|
b Vika 2 b Hermes 3
|
|
b Vika 2 b Ivan 11
|
|
b Vika 2 b Harry 4
|
|
select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
|
|
a b max_c a b c
|
|
b Vika 2 b Ivan 1
|
|
b Vika 2 b Ali 6
|
|
b Vika 2 b Hermes 3
|
|
b Vika 2 b Ivan 11
|
|
b Vika 2 b Harry 4
|
|
explain select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 12 Using where
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1_char ALL NULL NULL NULL NULL 12 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "v.a = 'b' and (v.b = 'Vika' or v.b = 'Ali')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 9",
|
|
"filesort": {
|
|
"sort_key": "t1_char.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_char",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_char.a = 'b' and (t1_char.b = 'Vika' or t1_char.b = 'Ali')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a = 'b'"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "220",
|
|
"join_type": "BNL"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : pushing in all tables
|
|
# extracted or formula : pushing into WHERE
|
|
# conjunctive subformulas : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,v3,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33))
|
|
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
|
|
a b max_c avg_c a b max_c avg_c a b min_c a b c d
|
|
6 20 315 279.3333 6 20 315 279.3333 7 11 708 7 13 312 406
|
|
6 20 315 279.3333 6 20 315 279.3333 8 33 114 8 64 248 107
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 214 6 20 315 279
|
|
6 20 315 279.3333 6 20 315 279.3333 8 33 114 8 80 800 314
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 214 6 23 303 909
|
|
8 33 404 213.6667 6 20 315 279.3333 8 33 114 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279.3333 8 33 114 8 80 800 314
|
|
6 20 315 279.3333 8 33 404 213.6667 6 20 214 6 20 315 279
|
|
6 20 315 279.3333 8 33 404 213.6667 6 20 214 6 23 303 909
|
|
8 33 404 213.6667 8 33 404 213.6667 7 11 708 7 13 312 406
|
|
8 33 404 213.6667 8 33 404 213.6667 8 33 114 8 64 248 107
|
|
8 33 404 213.6667 8 33 404 213.6667 6 20 214 6 20 315 279
|
|
8 33 404 213.6667 8 33 404 213.6667 8 33 114 8 80 800 314
|
|
8 33 404 213.6667 8 33 404 213.6667 6 20 214 6 23 303 909
|
|
select * from v1,v2,v3,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33))
|
|
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
|
|
a b max_c avg_c a b max_c avg_c a b min_c a b c d
|
|
6 20 315 279.3333 6 20 315 279.3333 7 11 708 7 13 312 406
|
|
6 20 315 279.3333 6 20 315 279.3333 8 33 114 8 64 248 107
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 214 6 20 315 279
|
|
6 20 315 279.3333 6 20 315 279.3333 8 33 114 8 80 800 314
|
|
6 20 315 279.3333 6 20 315 279.3333 6 20 214 6 23 303 909
|
|
8 33 404 213.6667 6 20 315 279.3333 8 33 114 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279.3333 8 33 114 8 80 800 314
|
|
6 20 315 279.3333 8 33 404 213.6667 6 20 214 6 20 315 279
|
|
6 20 315 279.3333 8 33 404 213.6667 6 20 214 6 23 303 909
|
|
8 33 404 213.6667 8 33 404 213.6667 7 11 708 7 13 312 406
|
|
8 33 404 213.6667 8 33 404 213.6667 8 33 114 8 64 248 107
|
|
8 33 404 213.6667 8 33 404 213.6667 6 20 214 6 20 315 279
|
|
8 33 404 213.6667 8 33 404 213.6667 8 33 114 8 80 800 314
|
|
8 33 404 213.6667 8 33 404 213.6667 6 20 214 6 23 303 909
|
|
explain select * from v1,v2,v3,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33))
|
|
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 test.t2.a 2 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (incremental, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
explain format=json select * from v1,v2,v3,t2 where
|
|
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33))
|
|
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v3.b < 50 or v3.b = 33",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "min_c > 109",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and (t1.b < 50 or t1.b = 33)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c < 500"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "715",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c < 500",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.max_c > 300"
|
|
},
|
|
"buffer_type": "incremental",
|
|
"buffer_size": "9Kb",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v2.a = v1.a or v1.a = t2.a",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707 and max_c > 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : pushing in all tables
|
|
# conjunctive subformulas : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
|
|
a b max_c avg_c a b min_c a b c d
|
|
select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
|
|
a b max_c avg_c a b min_c a b c d
|
|
explain select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key1 key1 5 test.t2.b 2 Using where
|
|
1 PRIMARY <derived3> ref key0 key0 5 v1.a 2 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key1"],
|
|
"key": "key1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 130 and v1.a is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["v1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.min_c < 130",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "min_c < 707 and min_c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using several derived tables : pushing in all tables
|
|
# extracted or formulas : pushing into HAVING
|
|
# conjunctive subformula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
(select a, b, avg(c) as avg_c from t1
|
|
where t1.a<8 group by a,b) v3,
|
|
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
|
|
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
|
|
a b max_c avg_c a b min_c a b avg_c a b c d
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 2 3 207 207
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 1 21 909 12
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 7 13 312 406
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 8 64 248 107
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 6 20 315 279
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 1 19 203 107
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 8 80 800 314
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 3 12 231 190
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 6 23 303 909
|
|
select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
(select a, b, avg(c) as avg_c from t1
|
|
where t1.a<8 group by a,b) v3,
|
|
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
|
|
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
|
|
a b max_c avg_c a b min_c a b avg_c a b c d
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 2 3 207 207
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 1 21 909 12
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 7 13 312 406
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 8 64 248 107
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 6 20 315 279
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 1 19 203 107
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 8 80 800 314
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 3 12 231 190
|
|
8 33 404 213.6667 8 33 114 1 33 497.5000 6 23 303 909
|
|
explain select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
(select a, b, avg(c) as avg_c from t1
|
|
where t1.a<8 group by a,b) v3,
|
|
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
|
|
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived3> ref key0 key0 5 v1.a 2 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 v1.b 2 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
(select a, b, min(c) as min_c from t1
|
|
where t1.a>5 group by a,b having min_c < 707) v2,
|
|
(select a, b, avg(c) as avg_c from t1
|
|
where t1.a<8 group by a,b) v3,
|
|
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
|
|
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.avg_c < 400 or v1.a > 1"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "(v1.avg_c < 400 or v1.a > 1) and v1.a is not null and v1.b is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (avg_c < 400 or t1.a > 1)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["v1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.min_c < 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "min_c < 707 and min_c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["v1.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v3.avg_c > 170 or v3.a < 5",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "avg_c > 170 or t1.a < 5",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 8"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted or formula : pushing into HAVING
|
|
# conjunctive subformula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
|
|
a b max_c avg_c a b c d
|
|
5 27 132 132.0000 2 3 207 207
|
|
5 27 132 132.0000 1 21 909 12
|
|
5 27 132 132.0000 7 13 312 406
|
|
5 27 132 132.0000 8 64 248 107
|
|
5 27 132 132.0000 6 20 315 279
|
|
5 27 132 132.0000 1 19 203 107
|
|
5 27 132 132.0000 8 80 800 314
|
|
5 27 132 132.0000 3 12 231 190
|
|
5 27 132 132.0000 6 23 303 909
|
|
select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
|
|
a b max_c avg_c a b c d
|
|
5 27 132 132.0000 2 3 207 207
|
|
5 27 132 132.0000 1 21 909 12
|
|
5 27 132 132.0000 7 13 312 406
|
|
5 27 132 132.0000 8 64 248 107
|
|
5 27 132 132.0000 6 20 315 279
|
|
5 27 132 132.0000 1 19 203 107
|
|
5 27 132 132.0000 8 80 800 314
|
|
5 27 132 132.0000 3 12 231 190
|
|
5 27 132 132.0000 6 23 303 909
|
|
explain select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
group by a,b having max_c < 707) v1,
|
|
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "(v1.a = 1 or v1.max_c < 300) and v1.b > 25"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a = 1 or v1.max_c < 300",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and (t1.a = 1 or max_c < 300)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 25"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# extracted and formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
|
|
a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 23 303 909
|
|
select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
|
|
a b max_c avg_c a b c d
|
|
6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 23 303 909
|
|
explain select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
|
|
where t1.a>5 group by a,b having max_c < 707) v1,
|
|
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 300 and v1.b < 30",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 707 and max_c > 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b < 30"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using query with union
|
|
# conjunctive subformula : pushing into WHERE
|
|
# conjunctive subformulas : pushing into HAVING and WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
|
|
union
|
|
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
|
|
union
|
|
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
|
|
a b max_c avg_c a b c d
|
|
1 21 500 234.6000 1 21 909 12
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
|
|
union
|
|
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived3> ref key0 key0 5 test.t2.b 2 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 UNION t2 ALL NULL NULL NULL NULL 9 Using where
|
|
2 UNION <derived4> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
|
|
union
|
|
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union1,2>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c > 800 and t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 5",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.d > 800"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 100 and v1.a > 7"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707 and max_c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 7"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
# using query with union
|
|
# extracted and formula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
|
|
union
|
|
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
6 20 315 279.3333 7 13 312 406
|
|
6 20 315 279.3333 8 64 248 107
|
|
6 20 315 279.3333 8 80 800 314
|
|
select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
|
|
union
|
|
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 2 3 207 207
|
|
1 21 500 234.6000 7 13 312 406
|
|
1 21 500 234.6000 8 64 248 107
|
|
1 21 500 234.6000 6 20 315 279
|
|
1 21 500 234.6000 8 80 800 314
|
|
1 21 500 234.6000 3 12 231 190
|
|
1 21 500 234.6000 6 23 303 909
|
|
6 20 315 279.3333 7 13 312 406
|
|
6 20 315 279.3333 8 64 248 107
|
|
6 20 315 279.3333 8 80 800 314
|
|
explain select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
|
|
union
|
|
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 UNION t2 ALL NULL NULL NULL NULL 9
|
|
2 UNION <derived4> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
|
|
union
|
|
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union1,2>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b = 19"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b = 19 and v1.a < 5"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = 19 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 400 or v1.avg_c > 270"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "(v1.max_c > 400 or v1.avg_c > 270) and v1.a < t2.a",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707 and (max_c > 400 or avg_c > 270)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
# using query with union
|
|
# extracted or formula : pushing into HAVING
|
|
# extracted or formula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
|
|
union
|
|
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
select * from v1,t2 where
|
|
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
|
|
union
|
|
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
1 21 500 234.6000 1 21 909 12
|
|
1 21 500 234.6000 1 19 203 107
|
|
6 20 315 279.3333 6 20 315 279
|
|
6 20 315 279.3333 6 23 303 909
|
|
8 33 404 213.6667 2 3 207 207
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 7 13 312 406
|
|
8 33 404 213.6667 8 64 248 107
|
|
8 33 404 213.6667 6 20 315 279
|
|
8 33 404 213.6667 1 19 203 107
|
|
8 33 404 213.6667 8 80 800 314
|
|
8 33 404 213.6667 3 12 231 190
|
|
8 33 404 213.6667 6 23 303 909
|
|
explain select * from v1,t2 where
|
|
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
|
|
union
|
|
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 UNION t2 ALL NULL NULL NULL NULL 9
|
|
2 UNION <derived4> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where
|
|
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
|
|
union
|
|
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union1,2>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1 or v1.a = 6"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "(v1.a = t2.a or v1.b = t2.b) and (v1.a = 1 or v1.a = 6)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 or t1.a = 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 3 and v1.b > 27 or v1.max_c > 550"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.a > 3 and v1.b > 27 or v1.max_c > 550",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707 and (t1.a > 3 and t1.b > 27 or max_c > 550)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
# using query with union
|
|
# extracted or formula : pushing into HAVING
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
|
|
union
|
|
select * from v2,t2 where
|
|
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
|
|
union
|
|
select * from v2,t2 where
|
|
(v2.max_c=t2.c) and (v2.b<10);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
6 20 315 279.3333 1 21 909 12
|
|
6 20 315 279.3333 1 19 203 107
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 1 19 203 107
|
|
select * from v1,t2 where
|
|
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
|
|
union
|
|
select * from v2,t2 where
|
|
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
|
|
union
|
|
select * from v2,t2 where
|
|
(v2.max_c=t2.c) and (v2.b<10);
|
|
a b max_c avg_c a b c d
|
|
1 19 107 107.0000 1 21 909 12
|
|
1 19 107 107.0000 1 19 203 107
|
|
6 20 315 279.3333 1 21 909 12
|
|
6 20 315 279.3333 1 19 203 107
|
|
8 33 404 213.6667 1 21 909 12
|
|
8 33 404 213.6667 1 19 203 107
|
|
explain select * from v1,t2 where
|
|
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
|
|
union
|
|
select * from v2,t2 where
|
|
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
|
|
union
|
|
select * from v2,t2 where
|
|
(v2.max_c=t2.c) and (v2.b<10);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 UNION t2 ALL NULL NULL NULL NULL 9 Using where
|
|
2 UNION <derived5> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
5 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t2 ALL NULL NULL NULL NULL 9 Using where
|
|
3 UNION <derived6> ref key0 key0 5 test.t2.c 2 Using where
|
|
6 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union1,2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
|
|
union
|
|
select * from v2,t2 where
|
|
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
|
|
union
|
|
select * from v2,t2 where
|
|
(v2.max_c=t2.c) and (v2.b<10);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union1,2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 1"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1 and (v1.max_c < 500 or v1.avg_c > 500)"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.max_c < 500 or v1.avg_c > 500",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707 and (max_c < 500 or avg_c > 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 2"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived5>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.b > 10"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v2.a < t2.b or v2.max_c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived6>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["max_c"],
|
|
"ref": ["test.t2.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.b < 10",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 6,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b < 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
# using derived table with union
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
|
|
a b c a b c d
|
|
1 19 107 2 3 207 207
|
|
1 19 107 1 21 909 12
|
|
1 19 107 7 13 312 406
|
|
1 19 107 8 64 248 107
|
|
1 19 107 6 20 315 279
|
|
1 19 107 1 19 203 107
|
|
1 19 107 8 80 800 314
|
|
1 19 107 3 12 231 190
|
|
1 19 107 6 23 303 909
|
|
select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
|
|
a b c a b c d
|
|
1 19 107 2 3 207 207
|
|
1 19 107 1 21 909 12
|
|
1 19 107 7 13 312 406
|
|
1 19 107 8 64 248 107
|
|
1 19 107 6 20 315 279
|
|
1 19 107 1 19 203 107
|
|
1 19 107 8 80 800 314
|
|
1 19 107 3 12 231 190
|
|
1 19 107 6 23 303 909
|
|
explain select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 40 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 40,
|
|
"filtered": 100,
|
|
"attached_condition": "v_union.a < 3 and v_union.c > 100"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109 and c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and t1.a < 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union
|
|
# conjunctive subformula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,t2 where
|
|
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
|
|
a b c a b c d
|
|
1 19 107 2 3 207 207
|
|
1 19 107 1 21 909 12
|
|
1 19 107 7 13 312 406
|
|
1 19 107 8 64 248 107
|
|
1 19 107 6 20 315 279
|
|
1 19 107 1 19 203 107
|
|
1 19 107 8 80 800 314
|
|
1 19 107 3 12 231 190
|
|
1 19 107 6 23 303 909
|
|
select * from v_union,t2 where
|
|
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
|
|
a b c a b c d
|
|
1 19 107 2 3 207 207
|
|
1 19 107 1 21 909 12
|
|
1 19 107 7 13 312 406
|
|
1 19 107 8 64 248 107
|
|
1 19 107 6 20 315 279
|
|
1 19 107 1 19 203 107
|
|
1 19 107 8 80 800 314
|
|
1 19 107 3 12 231 190
|
|
1 19 107 6 23 303 909
|
|
explain select * from v_union,t2 where
|
|
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 40 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v_union,t2 where
|
|
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 40,
|
|
"filtered": 100,
|
|
"attached_condition": "(v_union.a < 2 or v_union.c > 800) and v_union.b > 12"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v_union.a < 2 or v_union.c > 800",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109 and (t1.a < 2 or c > 800)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and t1.b > 12"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and (t1.a < 2 or c > 800)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.b > 12"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union
|
|
# conjunctive subformula : pushing into HAVING
|
|
# conjunctive subformula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,t2 where
|
|
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
|
|
a b c a b c d
|
|
1 19 107 1 21 909 12
|
|
1 19 107 1 19 203 107
|
|
select * from v_union,t2 where
|
|
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
|
|
a b c a b c d
|
|
1 19 107 1 21 909 12
|
|
1 19 107 1 19 203 107
|
|
explain select * from v_union,t2 where
|
|
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 40 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v_union,t2 where
|
|
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 1"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 40,
|
|
"filtered": 100,
|
|
"attached_condition": "v_union.a = 1 and v_union.c < 200"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
|
|
a b max_c a b c
|
|
c Vika 7 c Vinny 3
|
|
c Vika 7 c Inga 9
|
|
c Vika 7 c Ivan 2
|
|
c Vika 7 c Inga 2
|
|
select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
|
|
a b max_c a b c
|
|
c Vika 7 c Vinny 3
|
|
c Vika 7 c Inga 9
|
|
c Vika 7 c Ivan 2
|
|
c Vika 7 c Inga 2
|
|
explain select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t ALL NULL NULL NULL NULL 12 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 2 test.t.a 2 Using where
|
|
2 DERIVED t1_char ALL NULL NULL NULL NULL 12 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v_char as v,t2_char as t where
|
|
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "2",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v.b = 'Vika' and v.max_c > 2",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 9 and max_c > 2",
|
|
"filesort": {
|
|
"sort_key": "t1_char.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1_char",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "t1_char.b = 'Vika'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union
|
|
# using several derived tables : pushing in all tables
|
|
# conjunctive subformula : pushing into WHERE using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,v1,t2 where
|
|
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1)
|
|
and ((v_union.c>800) or (v1.max_c>200));
|
|
a b c a b max_c avg_c a b c d
|
|
1 19 107 1 21 500 234.6000 1 21 909 12
|
|
1 19 107 1 21 500 234.6000 1 19 203 107
|
|
select * from v_union,v1,t2 where
|
|
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1)
|
|
and ((v_union.c>800) or (v1.max_c>200));
|
|
a b c a b max_c avg_c a b c d
|
|
1 19 107 1 21 500 234.6000 1 21 909 12
|
|
1 19 107 1 21 500 234.6000 1 19 203 107
|
|
explain select * from v_union,v1,t2 where
|
|
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1)
|
|
and ((v_union.c>800) or (v1.max_c>200));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 40 Using where; Using join buffer (incremental, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v_union,v1,t2 where
|
|
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1)
|
|
and ((v_union.c>800) or (v1.max_c>200));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 1"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 40,
|
|
"filtered": 100,
|
|
"attached_condition": "v_union.a = 1"
|
|
},
|
|
"buffer_type": "incremental",
|
|
"buffer_size": "4Kb",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v_union.c > 800 or v1.max_c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union
|
|
# extracted or formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2_union as v,t2 where
|
|
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
|
|
a b c a b c d
|
|
8 33 404.0000 8 64 248 107
|
|
6 20 312.0000 6 20 315 279
|
|
6 20 214.0000 6 20 315 279
|
|
8 33 404.0000 8 80 800 314
|
|
6 20 312.0000 6 23 303 909
|
|
6 20 214.0000 6 23 303 909
|
|
select * from v2_union as v,t2 where
|
|
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
|
|
a b c a b c d
|
|
8 33 404.0000 8 64 248 107
|
|
6 20 312.0000 6 20 315 279
|
|
6 20 214.0000 6 20 315 279
|
|
8 33 404.0000 8 80 800 314
|
|
6 20 312.0000 6 23 303 909
|
|
6 20 214.0000 6 23 303 909
|
|
explain select * from v2_union as v,t2 where
|
|
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 6 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
4 UNION t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union2,3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v2_union as v,t2 where
|
|
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "(t2.a = 6 or t2.a = 8) and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 6,
|
|
"filtered": 100,
|
|
"attached_condition": "v.c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and (t1.a = 6 or t1.a = 8)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.a = 6 or t1.a = 8)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 707 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c > 300 and (t1.a = 6 or t1.a = 8)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union of selects without aggregation
|
|
# extracted conjunctive predicate: pushing in WHERE of both selects
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
|
|
a b c a b c d
|
|
1 21 123 1 21 909 12
|
|
1 21 101 1 21 909 12
|
|
1 21 104 1 21 909 12
|
|
1 33 988 1 21 909 12
|
|
1 19 107 1 21 909 12
|
|
1 21 500 1 21 909 12
|
|
1 21 345 1 21 909 12
|
|
7 11 708 7 13 312 406
|
|
7 11 8 7 13 312 406
|
|
8 33 404 8 64 248 107
|
|
8 33 123 8 64 248 107
|
|
8 33 114 8 64 248 107
|
|
8 33 9 8 64 248 107
|
|
6 20 214 6 20 315 279
|
|
6 20 315 6 20 315 279
|
|
6 20 309 6 20 315 279
|
|
6 20 7 6 20 315 279
|
|
1 21 123 1 19 203 107
|
|
1 21 101 1 19 203 107
|
|
1 21 104 1 19 203 107
|
|
1 33 988 1 19 203 107
|
|
1 19 107 1 19 203 107
|
|
1 21 500 1 19 203 107
|
|
1 21 345 1 19 203 107
|
|
8 33 404 8 80 800 314
|
|
8 33 123 8 80 800 314
|
|
8 33 114 8 80 800 314
|
|
8 33 9 8 80 800 314
|
|
6 20 214 6 23 303 909
|
|
6 20 315 6 23 303 909
|
|
6 20 309 6 23 303 909
|
|
6 20 7 6 23 303 909
|
|
select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
|
|
a b c a b c d
|
|
1 21 123 1 21 909 12
|
|
1 21 101 1 21 909 12
|
|
1 21 104 1 21 909 12
|
|
1 33 988 1 21 909 12
|
|
1 19 107 1 21 909 12
|
|
1 21 500 1 21 909 12
|
|
1 21 345 1 21 909 12
|
|
7 11 708 7 13 312 406
|
|
7 11 8 7 13 312 406
|
|
8 33 404 8 64 248 107
|
|
8 33 123 8 64 248 107
|
|
8 33 114 8 64 248 107
|
|
8 33 9 8 64 248 107
|
|
6 20 214 6 20 315 279
|
|
6 20 315 6 20 315 279
|
|
6 20 309 6 20 315 279
|
|
6 20 7 6 20 315 279
|
|
1 21 123 1 19 203 107
|
|
1 21 101 1 19 203 107
|
|
1 21 104 1 19 203 107
|
|
1 33 988 1 19 203 107
|
|
1 19 107 1 19 203 107
|
|
1 21 500 1 19 203 107
|
|
1 21 345 1 19 203 107
|
|
8 33 404 8 80 800 314
|
|
8 33 123 8 80 800 314
|
|
8 33 114 8 80 800 314
|
|
8 33 9 8 80 800 314
|
|
6 20 214 6 23 303 909
|
|
6 20 315 6 23 303 909
|
|
6 20 309 6 23 303 909
|
|
6 20 7 6 23 303 909
|
|
explain select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 4 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "v.c > 6",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and t1.a + 1 > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.c > 100 and t1.c > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union of selects without aggregation
|
|
# extracted conjunctive OR subformula: pushing in WHERE using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
|
|
a b c a b c d
|
|
1 19 107 1 21 909 12
|
|
1 19 2 1 21 909 12
|
|
7 11 708 7 13 312 406
|
|
7 11 8 7 13 312 406
|
|
8 33 404 8 64 248 107
|
|
8 33 123 8 64 248 107
|
|
8 33 114 8 64 248 107
|
|
8 33 9 8 64 248 107
|
|
6 20 214 6 20 315 279
|
|
6 20 315 6 20 315 279
|
|
6 20 309 6 20 315 279
|
|
6 20 7 6 20 315 279
|
|
1 19 107 1 19 203 107
|
|
1 19 2 1 19 203 107
|
|
8 33 404 8 80 800 314
|
|
8 33 123 8 80 800 314
|
|
8 33 114 8 80 800 314
|
|
8 33 9 8 80 800 314
|
|
6 20 214 6 23 303 909
|
|
6 20 315 6 23 303 909
|
|
6 20 309 6 23 303 909
|
|
6 20 7 6 23 303 909
|
|
select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
|
|
a b c a b c d
|
|
1 19 107 1 21 909 12
|
|
1 19 2 1 21 909 12
|
|
7 11 708 7 13 312 406
|
|
7 11 8 7 13 312 406
|
|
8 33 404 8 64 248 107
|
|
8 33 123 8 64 248 107
|
|
8 33 114 8 64 248 107
|
|
8 33 9 8 64 248 107
|
|
6 20 214 6 20 315 279
|
|
6 20 315 6 20 315 279
|
|
6 20 309 6 20 315 279
|
|
6 20 7 6 20 315 279
|
|
1 19 107 1 19 203 107
|
|
1 19 2 1 19 203 107
|
|
8 33 404 8 80 800 314
|
|
8 33 123 8 80 800 314
|
|
8 33 114 8 80 800 314
|
|
8 33 9 8 80 800 314
|
|
6 20 214 6 23 303 909
|
|
6 20 315 6 23 303 909
|
|
6 20 309 6 23 303 909
|
|
6 20 7 6 23 303 909
|
|
explain select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 4 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 1 or v.b < 20",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and (t1.a > 1 or t1.b < 20)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.c > 100 and (t1.a > 1 or t1.b < 20)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union of selects without aggregation
|
|
# extracted the whole condition: in WHERE of both selects
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v3_union as v,t2 where
|
|
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
|
|
a b c a b c d
|
|
1 19 2 1 21 909 12
|
|
1 21 2 1 21 909 12
|
|
1 19 2 1 19 203 107
|
|
1 21 2 1 19 203 107
|
|
select * from v3_union as v,t2 where
|
|
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
|
|
a b c a b c d
|
|
1 19 2 1 21 909 12
|
|
1 21 2 1 21 909 12
|
|
1 19 2 1 19 203 107
|
|
1 21 2 1 19 203 107
|
|
explain select * from v3_union as v,t2 where
|
|
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 4 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v3_union as v,t2 where
|
|
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "(v.b = 19 or v.b = 21) and (v.c < 3 or v.c > 600)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and (t1.b = 19 or t1.b = 21) and (t1.a + 1 < 3 or t1.a + 1 > 600)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.c > 100 and (t1.b = 19 or t1.b = 21) and (t1.c < 3 or t1.c > 600)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union of
|
|
# a select without aggregation and a select with aggregation
|
|
# extracted conjunctive predicate: pushing in WHERE of both selects
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
|
|
a b c a b c d
|
|
1 19 207 1 21 909 12
|
|
7 11 808 7 13 312 406
|
|
7 11 608 7 13 312 406
|
|
1 19 207 1 19 203 107
|
|
select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
|
|
a b c a b c d
|
|
1 19 207 1 21 909 12
|
|
7 11 808 7 13 312 406
|
|
7 11 608 7 13 312 406
|
|
1 19 207 1 19 203 107
|
|
explain select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 4 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "v.b < 20",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and t1.b < 20"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.b < 20"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using derived table with union of
|
|
# a select without aggregation and a select with aggregation
|
|
# extracted subformula: pushing in WHERE of one select
|
|
# extracted subformula: pushing in HAVING of the other select
|
|
# extracted sub-subformula: pushing in WHERE of the other select
|
|
# using an equality in all pushdowns
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4_union as v,t2 where
|
|
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
|
|
a b c a b c d
|
|
1 33 1088 1 21 909 12
|
|
1 21 600 1 21 909 12
|
|
1 33 888 1 21 909 12
|
|
7 11 808 7 13 312 406
|
|
7 11 608 7 13 312 406
|
|
8 33 504 8 64 248 107
|
|
1 33 1088 1 19 203 107
|
|
1 21 600 1 19 203 107
|
|
1 33 888 1 19 203 107
|
|
8 33 504 8 80 800 314
|
|
select * from v4_union as v,t2 where
|
|
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
|
|
a b c a b c d
|
|
1 33 1088 1 21 909 12
|
|
1 21 600 1 21 909 12
|
|
1 33 888 1 21 909 12
|
|
7 11 808 7 13 312 406
|
|
7 11 608 7 13 312 406
|
|
8 33 504 8 64 248 107
|
|
1 33 1088 1 19 203 107
|
|
1 21 600 1 19 203 107
|
|
1 33 888 1 19 203 107
|
|
8 33 504 8 80 800 314
|
|
explain select * from v4_union as v,t2 where
|
|
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 4 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 20 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v4_union as v,t2 where
|
|
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "(t2.a < 3 or v.b < 40) and v.c > 500",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 109 and c > 500",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 10 and (t1.a < 3 or t1.b < 40)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.a < 3 or t1.b < 40) and t1.c + 100 > 500"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded derived table : pushing the same conditions
|
|
# using several derived tables : pushing in all tables
|
|
# conjunctive subformula : pushing into WHERE
|
|
# extracted and formula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1 where
|
|
(v4.a<13) and (v1.a>5) and (v1.b>12);
|
|
a b min_c a b max_c avg_c
|
|
1 19 107 6 20 315 279.3333
|
|
1 21 500 6 20 315 279.3333
|
|
5 16 207 6 20 315 279.3333
|
|
5 27 132 6 20 315 279.3333
|
|
6 20 315 6 20 315 279.3333
|
|
8 33 404 6 20 315 279.3333
|
|
1 19 107 8 33 404 213.6667
|
|
1 21 500 8 33 404 213.6667
|
|
5 16 207 8 33 404 213.6667
|
|
5 27 132 8 33 404 213.6667
|
|
6 20 315 8 33 404 213.6667
|
|
8 33 404 8 33 404 213.6667
|
|
select * from v4,v1 where
|
|
(v4.a<13) and (v1.a>5) and (v1.b>12);
|
|
a b min_c a b max_c avg_c
|
|
1 19 107 6 20 315 279.3333
|
|
1 21 500 6 20 315 279.3333
|
|
5 16 207 6 20 315 279.3333
|
|
5 27 132 6 20 315 279.3333
|
|
6 20 315 6 20 315 279.3333
|
|
8 33 404 6 20 315 279.3333
|
|
1 19 107 8 33 404 213.6667
|
|
1 21 500 8 33 404 213.6667
|
|
5 16 207 8 33 404 213.6667
|
|
5 27 132 8 33 404 213.6667
|
|
6 20 315 8 33 404 213.6667
|
|
8 33 404 8 33 404 213.6667
|
|
explain select * from v4,v1 where
|
|
(v4.a<13) and (v1.a>5) and (v1.b>12);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v1 where
|
|
(v4.a<13) and (v1.a>5) and (v1.b>12);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.a < 13",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15 and v1.a < 13",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15 and t1.a < 13"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 5 and v1.b > 12"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "333",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b > 12"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : nothing to push
|
|
# using several derived tables : pushing only in one table
|
|
# conjunctive subformula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
|
|
a b min_c a b max_c avg_c a b c d
|
|
8 33 404 8 33 404 213.6667 8 64 248 107
|
|
8 33 404 8 33 404 213.6667 8 80 800 314
|
|
select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
|
|
a b min_c a b max_c avg_c a b c d
|
|
8 33 404 8 33 404 213.6667 8 64 248 107
|
|
8 33 404 8 33 404 213.6667 8 80 800 314
|
|
explain select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key1 key1 5 test.t2.a 2
|
|
1 PRIMARY <derived4> ref key0 key0 5 test.t2.a 2 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key1"],
|
|
"key": "key1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b > 30",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 30"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing different conditions
|
|
# using several derived tables : pushing in all tables
|
|
# conjunctive subformula : pushing into WHERE using equalities
|
|
# extracted and formula : pushing into WHERE using equalities
|
|
# conjunctive subformula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
|
|
a b min_c a b max_c avg_c a b c d
|
|
6 20 315 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 6 20 315 279.3333 6 23 303 909
|
|
select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
|
|
a b min_c a b max_c avg_c a b c d
|
|
6 20 315 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 6 20 315 279.3333 6 23 303 909
|
|
explain select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key1 key1 5 test.t2.a 2 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 test.t2.a 2 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v1,t2 where
|
|
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 1 and t2.a is not null and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key1"],
|
|
"key": "key1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.min_c > 100",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "min_c > 100",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15 and v1.a > 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15 and t1.a > 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b < 30",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 1 and t1.b < 30"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing different conditions
|
|
# using several derived tables : pushing in all tables
|
|
# extracted or formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1,t2 where
|
|
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
|
|
a b min_c a b max_c avg_c a b c d
|
|
1 19 107 1 21 500 234.6000 2 3 207 207
|
|
1 19 107 1 21 500 234.6000 1 21 909 12
|
|
1 19 107 1 21 500 234.6000 7 13 312 406
|
|
1 19 107 1 21 500 234.6000 8 64 248 107
|
|
1 19 107 1 21 500 234.6000 6 20 315 279
|
|
1 19 107 1 21 500 234.6000 1 19 203 107
|
|
1 19 107 1 21 500 234.6000 8 80 800 314
|
|
1 19 107 1 21 500 234.6000 3 12 231 190
|
|
1 19 107 1 21 500 234.6000 6 23 303 909
|
|
5 16 207 5 16 207 207.0000 2 3 207 207
|
|
5 16 207 5 16 207 207.0000 1 21 909 12
|
|
5 16 207 5 16 207 207.0000 7 13 312 406
|
|
5 16 207 5 16 207 207.0000 8 64 248 107
|
|
5 16 207 5 16 207 207.0000 6 20 315 279
|
|
5 16 207 5 16 207 207.0000 1 19 203 107
|
|
5 16 207 5 16 207 207.0000 8 80 800 314
|
|
5 16 207 5 16 207 207.0000 3 12 231 190
|
|
5 16 207 5 16 207 207.0000 6 23 303 909
|
|
5 27 132 5 16 207 207.0000 2 3 207 207
|
|
5 27 132 5 16 207 207.0000 1 21 909 12
|
|
5 27 132 5 16 207 207.0000 7 13 312 406
|
|
5 27 132 5 16 207 207.0000 8 64 248 107
|
|
5 27 132 5 16 207 207.0000 6 20 315 279
|
|
5 27 132 5 16 207 207.0000 1 19 203 107
|
|
5 27 132 5 16 207 207.0000 8 80 800 314
|
|
5 27 132 5 16 207 207.0000 3 12 231 190
|
|
5 27 132 5 16 207 207.0000 6 23 303 909
|
|
6 20 315 6 20 315 279.3333 2 3 207 207
|
|
6 20 315 6 20 315 279.3333 1 21 909 12
|
|
6 20 315 6 20 315 279.3333 7 13 312 406
|
|
6 20 315 6 20 315 279.3333 8 64 248 107
|
|
6 20 315 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 6 20 315 279.3333 1 19 203 107
|
|
6 20 315 6 20 315 279.3333 8 80 800 314
|
|
6 20 315 6 20 315 279.3333 3 12 231 190
|
|
6 20 315 6 20 315 279.3333 6 23 303 909
|
|
8 33 404 8 33 404 213.6667 2 3 207 207
|
|
8 33 404 8 33 404 213.6667 1 21 909 12
|
|
8 33 404 8 33 404 213.6667 7 13 312 406
|
|
8 33 404 8 33 404 213.6667 8 64 248 107
|
|
8 33 404 8 33 404 213.6667 6 20 315 279
|
|
8 33 404 8 33 404 213.6667 1 19 203 107
|
|
8 33 404 8 33 404 213.6667 8 80 800 314
|
|
8 33 404 8 33 404 213.6667 3 12 231 190
|
|
8 33 404 8 33 404 213.6667 6 23 303 909
|
|
select * from v4,v1,t2 where
|
|
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
|
|
a b min_c a b max_c avg_c a b c d
|
|
1 19 107 1 21 500 234.6000 2 3 207 207
|
|
1 19 107 1 21 500 234.6000 1 21 909 12
|
|
1 19 107 1 21 500 234.6000 7 13 312 406
|
|
1 19 107 1 21 500 234.6000 8 64 248 107
|
|
1 19 107 1 21 500 234.6000 6 20 315 279
|
|
1 19 107 1 21 500 234.6000 1 19 203 107
|
|
1 19 107 1 21 500 234.6000 8 80 800 314
|
|
1 19 107 1 21 500 234.6000 3 12 231 190
|
|
1 19 107 1 21 500 234.6000 6 23 303 909
|
|
5 16 207 5 16 207 207.0000 2 3 207 207
|
|
5 16 207 5 16 207 207.0000 1 21 909 12
|
|
5 16 207 5 16 207 207.0000 7 13 312 406
|
|
5 16 207 5 16 207 207.0000 8 64 248 107
|
|
5 16 207 5 16 207 207.0000 6 20 315 279
|
|
5 16 207 5 16 207 207.0000 1 19 203 107
|
|
5 16 207 5 16 207 207.0000 8 80 800 314
|
|
5 16 207 5 16 207 207.0000 3 12 231 190
|
|
5 16 207 5 16 207 207.0000 6 23 303 909
|
|
5 27 132 5 16 207 207.0000 2 3 207 207
|
|
5 27 132 5 16 207 207.0000 1 21 909 12
|
|
5 27 132 5 16 207 207.0000 7 13 312 406
|
|
5 27 132 5 16 207 207.0000 8 64 248 107
|
|
5 27 132 5 16 207 207.0000 6 20 315 279
|
|
5 27 132 5 16 207 207.0000 1 19 203 107
|
|
5 27 132 5 16 207 207.0000 8 80 800 314
|
|
5 27 132 5 16 207 207.0000 3 12 231 190
|
|
5 27 132 5 16 207 207.0000 6 23 303 909
|
|
6 20 315 6 20 315 279.3333 2 3 207 207
|
|
6 20 315 6 20 315 279.3333 1 21 909 12
|
|
6 20 315 6 20 315 279.3333 7 13 312 406
|
|
6 20 315 6 20 315 279.3333 8 64 248 107
|
|
6 20 315 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 6 20 315 279.3333 1 19 203 107
|
|
6 20 315 6 20 315 279.3333 8 80 800 314
|
|
6 20 315 6 20 315 279.3333 3 12 231 190
|
|
6 20 315 6 20 315 279.3333 6 23 303 909
|
|
8 33 404 8 33 404 213.6667 2 3 207 207
|
|
8 33 404 8 33 404 213.6667 1 21 909 12
|
|
8 33 404 8 33 404 213.6667 7 13 312 406
|
|
8 33 404 8 33 404 213.6667 8 64 248 107
|
|
8 33 404 8 33 404 213.6667 6 20 315 279
|
|
8 33 404 8 33 404 213.6667 1 19 203 107
|
|
8 33 404 8 33 404 213.6667 8 80 800 314
|
|
8 33 404 8 33 404 213.6667 3 12 231 190
|
|
8 33 404 8 33 404 213.6667 6 23 303 909
|
|
explain select * from v4,v1,t2 where
|
|
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY <derived4> ref key0 key0 5 v4.a 2 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v1,t2 where
|
|
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.b > 10 and v4.a > 1 or v4.b < 20"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "238",
|
|
"join_type": "BNL",
|
|
"attached_condition": "(v4.b > 10 and v4.a > 1 or v4.b < 20) and v4.a is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15 and (v1.b > 10 and v1.a > 1 or v1.b < 20)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15 and (t1.b > 10 and t1.a > 1 or t1.b < 20)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["v4.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.max_c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707 and max_c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing different conditions
|
|
# using several derived tables : pushing only in one table
|
|
# extracted or formula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
|
|
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
|
|
a b min_c a b max_c avg_c
|
|
select * from v4,v2 where
|
|
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
|
|
a b min_c a b max_c avg_c
|
|
explain select * from v4,v2 where
|
|
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v2 where
|
|
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.a > 12 and v4.min_c < 300 and v4.b > 13 or v4.a < 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "v1.a > 12 and min_c < 300 and v1.b > 13 or v1.a < 1",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15 and (v1.a > 12 and v1.b > 13 or v1.a < 1)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15 and (t1.a > 12 and t1.b > 13 or t1.a < 1)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "333",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing different conditions
|
|
# using several derived tables : pushing only in one table
|
|
# conjunctive subformula : pushing into WHERE
|
|
# conjunctive subformula : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
|
|
a b min_c a b max_c avg_c
|
|
select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
|
|
a b min_c a b max_c avg_c
|
|
explain select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 v4.a 2
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.b = v4.a and v4.min_c < 100 and v4.a is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "min_c < 100",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b = v1.a and v1.a < 15",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = t1.a and t1.a < 15"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["v4.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing the same conditions
|
|
# using several derived tables : pushing in all tables
|
|
# extracted and formula : pushing into WHERE using equalities
|
|
# conjunctive subformula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
|
|
a b min_c a b max_c avg_c
|
|
select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
|
|
a b min_c a b max_c avg_c
|
|
explain select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 v4.a 2
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.b = v4.a and v4.a < 30 and v4.a is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b = v1.a and v1.a < 15 and v1.a < 30",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = t1.a and t1.a < 15 and t1.a < 30"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["v4.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and t1.b < 30"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing the same conditions
|
|
# using several derived tables : pushing in all tables
|
|
# extracted or formula : pushing into WHERE using equalities
|
|
# extracted and formula : pushing into WHERE using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
|
|
a b min_c a b max_c avg_c
|
|
select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
|
|
a b min_c a b max_c avg_c
|
|
explain select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 v4.a 2
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v2 where
|
|
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.b = v4.a and (v4.a < 30 or v4.a > 2) and v4.a is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b = v1.a and v1.a < 15 and (v1.a < 30 or v1.a > 2)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = t1.a and t1.a < 15 and (t1.a < 30 or t1.a > 2)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["v4.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5 and (t1.b < 30 or t1.b > 2)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing the same conditions
|
|
# using several derived tables : pushing in all tables
|
|
# extracted or formula : pushing into WHERE
|
|
# conjunctive subformula : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
|
|
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=v2.max_c) and (v4.min_c>100);
|
|
a b min_c a b max_c avg_c
|
|
6 20 315 6 20 315 279.3333
|
|
8 33 404 8 33 404 213.6667
|
|
select * from v4,v2 where
|
|
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=v2.max_c) and (v4.min_c>100);
|
|
a b min_c a b max_c avg_c
|
|
6 20 315 6 20 315 279.3333
|
|
8 33 404 8 33 404 213.6667
|
|
explain select * from v4,v2 where
|
|
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=v2.max_c) and (v4.min_c>100);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived4> ref key0 key0 5 v4.min_c 2
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v2 where
|
|
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=v2.max_c) and (v4.min_c>100);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "(v4.a < 12 and v4.b > 13 or v4.a > 10) and v4.min_c > 100 and v4.min_c is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "min_c > 100",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15 and (v1.a < 12 and v1.b > 13 or v1.a > 10)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15 and (t1.a < 12 and t1.b > 13 or t1.a > 10)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["max_c"],
|
|
"ref": ["v4.min_c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707 and max_c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using embedded view : pushing the same conditions
|
|
# using several derived tables : pushing only in one table
|
|
# extracted or formula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2,t2 where
|
|
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=t2.c) and (t2.c>100);
|
|
a b min_c a b max_c avg_c a b c d
|
|
6 20 315 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 8 33 404 213.6667 6 20 315 279
|
|
select * from v4,v2,t2 where
|
|
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=t2.c) and (t2.c>100);
|
|
a b min_c a b max_c avg_c a b c d
|
|
6 20 315 6 20 315 279.3333 6 20 315 279
|
|
6 20 315 8 33 404 213.6667 6 20 315 279
|
|
explain select * from v4,v2,t2 where
|
|
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=t2.c) and (t2.c>100);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 2 Using where
|
|
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from v4,v2,t2 where
|
|
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
|
|
(v4.min_c=t2.c) and (t2.c>100);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c > 100 and t2.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["min_c"],
|
|
"ref": ["test.t2.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v4.a < 12 and t2.b > 13 or v4.a > 10",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "min_c > 100",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 15 and (v1.a < 12 or v1.a > 10)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 15 and (t1.a < 12 or t1.a > 10)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "715",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "max_c < 707",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1,v2,v3,v4;
|
|
drop view v_union,v2_union,v3_union,v4_union;
|
|
drop view v_double,v_char,v_decimal;
|
|
drop table t1,t2,t1_double,t2_double,t1_char,t2_char,t1_decimal,t2_decimal;
|
|
#
|
|
# MDEV-10782: condition extracted from a multiple equality
|
|
# pushed into HAVING
|
|
#
|
|
CREATE TABLE t1 (i int);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
EXPLAIN EXTENDED
|
|
SELECT *
|
|
FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2
|
|
WHERE f = 8;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `sq1`.`f` AS `f` from (/* select#3 */ select min(`test`.`t1`.`i`) AS `f` from `test`.`t1` having `f` = 8) `sq1` where `sq1`.`f` = 8
|
|
SELECT *
|
|
FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2
|
|
WHERE f = 8;
|
|
f
|
|
SELECT *
|
|
FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2
|
|
WHERE f = 1;
|
|
f
|
|
1
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-10783: pushdown into constant view
|
|
#
|
|
CREATE TABLE t1 (i int) ENGINE=MyISAM;
|
|
CREATE VIEW v AS SELECT 5;
|
|
SELECT * FROM t1 WHERE 1 IN ( SELECT * FROM v );
|
|
i
|
|
DROP VIEW v;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-10785: second execution of a query with condition
|
|
# pushed into view
|
|
#
|
|
CREATE TABLE t1 (i int);
|
|
CREATE VIEW v1 AS SELECT i FROM t1 WHERE i < 5;
|
|
CREATE FUNCTION f (in1 int) RETURNS int RETURN in1;
|
|
CREATE VIEW v2 AS SELECT * FROM v1 GROUP BY i;
|
|
PREPARE stmt FROM "SELECT * FROM v2 WHERE f(0) <> 2";
|
|
EXECUTE stmt;
|
|
i
|
|
EXECUTE stmt;
|
|
i
|
|
DROP FUNCTION f;
|
|
DROP VIEW v2,v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-10884: condition pushdown into derived specified by
|
|
# 1. unit with SELECT containing ORDER BY ... LIMIT
|
|
# 2. unit containing global ORDER BY ... LIMIT
|
|
#
|
|
create table t1(a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
select a from t1 order by a limit 5;
|
|
a
|
|
0
|
|
1
|
|
2
|
|
3
|
|
4
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for
|
|
select * from (select a from t1 order by a limit 5) t where t.a not in (1,2,3);
|
|
a
|
|
0
|
|
4
|
|
set statement optimizer_switch='condition_pushdown_for_derived=on' for
|
|
select * from (select a from t1 order by a limit 5) t where t.a not in (1,2,3);
|
|
a
|
|
0
|
|
4
|
|
select a from t1 where a < 4 union select a from t1 where a > 5
|
|
order by a limit 5;
|
|
a
|
|
0
|
|
1
|
|
2
|
|
3
|
|
6
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for
|
|
select * from
|
|
(select a from t1 where a < 4 union select a from t1 where a > 5
|
|
order by a limit 5) t where t.a not in (2,9);
|
|
a
|
|
0
|
|
1
|
|
3
|
|
6
|
|
set statement optimizer_switch='condition_pushdown_for_derived=on' for
|
|
select * from
|
|
(select a from t1 where a < 4 union select a from t1 where a > 5
|
|
order by a limit 5) t where t.a not in (2,9);
|
|
a
|
|
0
|
|
1
|
|
3
|
|
6
|
|
drop table t1;
|
|
#
|
|
# MDEV-11072: pushdown of the condition obtained
|
|
# after constant row substitution
|
|
#
|
|
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
|
|
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
|
|
CREATE OR REPLACE VIEW v2 AS SELECT * FROM t2;
|
|
CREATE TABLE t3 (c INT) ENGINE=MyISAM;
|
|
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v3 AS SELECT * FROM t3;
|
|
SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT c FROM v3 WHERE c = a
|
|
)
|
|
);
|
|
a
|
|
INSERT INTO t1 VALUES (2);
|
|
INSERT INTO t2 VALUES (3), (2);
|
|
INSERT INTO t3 VALUES (4), (1), (2), (7);
|
|
SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT c FROM v3 WHERE c = a
|
|
)
|
|
);
|
|
a
|
|
2
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT c FROM v3 WHERE c = a
|
|
)
|
|
);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"const_condition": "0 or <in_optimizer>(2,<exists>(subquery#3))",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b = 2",
|
|
"first_match": "t1"
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived5>",
|
|
"access_type": "index_subquery",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["func"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.c = 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
CREATE TABLE t4 (d INT, e INT) ENGINE=MyISAM;
|
|
INSERT INTO t4 VALUES (1,10),(3,11),(2,10),(2,20),(3,21);
|
|
CREATE OR REPLACE VIEW v4 AS
|
|
SELECT d, sum(e) AS s FROM t4 GROUP BY d;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT d FROM v4 WHERE s > a
|
|
)
|
|
);
|
|
a
|
|
2
|
|
SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT d FROM v4 WHERE s > a
|
|
)
|
|
);
|
|
a
|
|
2
|
|
explain SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT d FROM v4 WHERE s > a
|
|
)
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1)
|
|
3 DEPENDENT SUBQUERY <derived5> index_subquery key0 key0 5 func 2 Using where
|
|
5 DERIVED t4 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
|
|
explain format=json SELECT * FROM t1 WHERE a IN (
|
|
SELECT b FROM v2 WHERE b < a OR b IN (
|
|
SELECT d FROM v4 WHERE s > a
|
|
)
|
|
);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"const_condition": "0 or <in_optimizer>(2,<exists>(subquery#3))",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b = 2",
|
|
"first_match": "t1"
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived5>",
|
|
"access_type": "index_subquery",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["d"],
|
|
"ref": ["func"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"having_condition": "s > 2",
|
|
"filesort": {
|
|
"sort_key": "t4.d",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v2,v3,v4;
|
|
DROP TABLE t1,t2,t3,t4;
|
|
#
|
|
# MDEV-10800: pushdown of the condition obtained
|
|
# after constant row substitution
|
|
#
|
|
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1);
|
|
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (3),(4);
|
|
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
|
|
SELECT * FROM
|
|
( SELECT * FROM t1
|
|
WHERE EXISTS ( SELECT * FROM v2 WHERE b = a ) ) AS sq;
|
|
a
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM
|
|
( SELECT * FROM t1
|
|
WHERE EXISTS ( SELECT * FROM v2 WHERE b = a ) ) AS sq;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"const_condition": "<in_optimizer>(1,exists(subquery#3))",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.b = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v2;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-11102: condition pushdown into materialized inner table
|
|
# of outer join is not applied as not being valid
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (0),(2);
|
|
CREATE TABLE t2 (b INT);
|
|
INSERT INTO t2 VALUES (1),(2);
|
|
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
|
|
SELECT * FROM t1 LEFT JOIN t2 ON a = b WHERE b IS NULL;
|
|
a b
|
|
0 NULL
|
|
SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;
|
|
a b
|
|
0 NULL
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "trigcond(v2.b is null) and trigcond(trigcond(t1.a is not null))",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v2;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-11103: pushdown condition with ANY subquery
|
|
#
|
|
CREATE TABLE t1 (i INT);
|
|
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "<nop>(v1.i <= 3)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "<nop>(t1.i <= 3)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
Warnings:
|
|
Note 1249 Select 2 was reduced during optimization
|
|
SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
|
|
i
|
|
1
|
|
2
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-11315: condition with outer reference to mergeable derived
|
|
#
|
|
CREATE TABLE t1 (pk1 INT PRIMARY KEY, a INT, b INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (10,7,1),(11,0,2);
|
|
CREATE TABLE t2 (pk2 INT PRIMARY KEY, c INT, d DATETIME) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES
|
|
(1,4,'2008-09-27 00:34:58'),
|
|
(2,5,'2007-05-28 00:00:00'),
|
|
(3,6,'2009-07-25 09:21:20');
|
|
CREATE VIEW v1 AS SELECT * FROM t1;
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
|
|
SELECT * FROM v1 AS sq
|
|
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
|
|
pk1 a b
|
|
10 7 1
|
|
11 0 2
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM v1 AS sq
|
|
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "<in_optimizer>(t1.b,<exists>(subquery#2)) or t1.b = 100"
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "index_subquery",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "4",
|
|
"used_key_parts": ["pk2"],
|
|
"ref": ["func"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM ( SELECT * FROM t1 ) AS sq
|
|
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
|
|
pk1 a b
|
|
10 7 1
|
|
11 0 2
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT * FROM t1 ) AS sq
|
|
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "<in_optimizer>(t1.b,<exists>(subquery#3)) or t1.b = 100"
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "index_subquery",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "4",
|
|
"used_key_parts": ["pk2"],
|
|
"ref": ["func"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1,v2;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-11313: pushdown of the condition obtained
|
|
# after constant row substitution
|
|
#
|
|
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (50);
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
SELECT ( SELECT COUNT(*) FROM v1 WHERE a = t2.b ) AS f FROM t2 GROUP BY f;
|
|
f
|
|
0
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT ( SELECT COUNT(*) FROM v1 WHERE a = t2.b ) AS f FROM t2 GROUP BY f;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 50",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 50"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
CREATE TABLE t3 (a INT, b INT) ENGINE=MYISAM;
|
|
INSERT INTO t3 VALUES (1,10),(3,11),(2,10),(2,20),(3,21);
|
|
CREATE VIEW v2 AS SELECT a, sum(b) AS s FROM t3 GROUP BY a ;
|
|
SELECT ( SELECT COUNT(*) FROM v2 WHERE s < t2.b ) AS f FROM t2 GROUP BY f;
|
|
f
|
|
3
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT ( SELECT COUNT(*) FROM v2 WHERE s < t2.b ) AS f FROM t2 GROUP BY f;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.s < 50",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "s < 50",
|
|
"filesort": {
|
|
"sort_key": "t3.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1,v2;
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# MDEV-10882: pushdown of the predicate with cached value
|
|
#
|
|
CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL) ENGINE=MyISAM;
|
|
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
INSERT INTO t1 VALUES (1,2),(3,4);
|
|
CREATE TABLE t2 (c INT NOT NULL) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (5),(6);
|
|
SELECT a, GROUP_CONCAT(b) FROM v1
|
|
WHERE b IN ( SELECT COUNT(c) FROM t2 ) GROUP BY a;
|
|
a GROUP_CONCAT(b)
|
|
1 2
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT a, GROUP_CONCAT(b) FROM v1
|
|
WHERE b IN ( SELECT COUNT(c) FROM t2 ) GROUP BY a;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery2>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"read_sorted_file": {
|
|
"filesort": {
|
|
"sort_key": "v1.a",
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b = 2",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b = 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-10836: pushdown of the predicate with cached value
|
|
#
|
|
CREATE TABLE t (pk INT PRIMARY KEY, f INT) ENGINE=MyISAM;
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v AS SELECT * FROM t;
|
|
INSERT INTO t VALUES (1,1),(3,2);
|
|
SELECT * FROM v AS v1, v AS v2
|
|
WHERE v2.pk > v1.f AND v1.f IN ( SELECT COUNT(pk) FROM t );
|
|
pk f pk f
|
|
3 2 3 2
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM v AS v1, v AS v2
|
|
WHERE v2.pk > v1.f AND v1.f IN ( SELECT COUNT(pk) FROM t );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery2>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.f = 2",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t.f = 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.pk > 2"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "119",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t",
|
|
"access_type": "range",
|
|
"possible_keys": ["PRIMARY"],
|
|
"key": "PRIMARY",
|
|
"key_length": "4",
|
|
"used_key_parts": ["pk"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"index_condition": "t.pk > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v;
|
|
DROP TABLE t;
|
|
#
|
|
# MDEV-11488: pushdown of the predicate with cached value
|
|
#
|
|
CREATE TABLE t1 (i INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(3),(2);
|
|
CREATE TABLE t2 (j INT, KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (3),(4);
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
3
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = 3",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
UPDATE t2 SET j = 2 WHERE j = 3;
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
2
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i FLOAT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1.5),(3.2),(2.71);
|
|
CREATE TABLE t2 (j FLOAT, KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (3.2),(2.71);
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
2.71
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = 2.71",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = 2.7100000381469727"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i DECIMAL(10,2)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1.5),(3.21),(2.47);
|
|
CREATE TABLE t2 (j DECIMAL(10,2), KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (3.21),(4.55);
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
3.21
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = 3.21",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = 3.21"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i VARCHAR(32)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('cc'),('aa'),('ddd');
|
|
CREATE TABLE t2 (j VARCHAR(16), KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES ('bbb'),('aa');
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
aa
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = 'aa'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = 'aa'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i DATETIME) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
('2008-09-27 00:34:58'),('2007-05-28 00:00:00'), ('2009-07-25 09:21:20');
|
|
CREATE TABLE t2 (j DATETIME, KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES
|
|
('2007-05-28 00:00:00'), ('2010-08-25 00:00:00');
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
2007-05-28 00:00:00
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = '2007-05-28 00:00:00'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = TIMESTAMP'2007-05-28 00:00:00'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i DATE) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('2008-09-27'),('2007-05-28'), ('2009-07-25');
|
|
CREATE TABLE t2 (j DATE, KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES ('2007-05-28'), ('2010-08-25');
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
2007-05-28
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = '2007-05-28'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = DATE'2007-05-28'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i TIME) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('00:34:58'),('10:00:02'), ('09:21:20');
|
|
CREATE TABLE t2 (j TIME, KEY(j)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES ('10:00:02'), ('11:00:10');
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
i
|
|
10:00:02
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
|
|
WHERE i IN ( SELECT MIN(j) FROM t2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "system",
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"table": {
|
|
"message": "Select tables optimized away"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "sq.i = '10:00:02'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.i = TIME'10:00:02'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-11593: pushdown of condition with NULLIF
|
|
#
|
|
CREATE TABLE t1 (i INT);
|
|
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
INSERT INTO t1 VALUES (2), (1);
|
|
SELECT * FROM v1 WHERE NULLIF(1, i);
|
|
i
|
|
2
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM v1 WHERE NULLIF(1, i);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "nullif(1,v1.i)",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "nullif(1,t1.i)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-11608: pushdown of the predicate with cached null value
|
|
#
|
|
CREATE TABLE t1 (c VARCHAR(3));
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
INSERT INTO t1 VALUES ('foo'),('bar');
|
|
CREATE TABLE t2 (c VARCHAR(3));
|
|
INSERT INTO t2 VALUES ('foo'),('xyz');
|
|
SELECT * FROM v1 WHERE v1.c IN ( SELECT MIN(c) FROM t2 WHERE 0 );
|
|
c
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM v1 WHERE v1.c IN ( SELECT MIN(c) FROM t2 WHERE 0 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"table": {
|
|
"message": "Impossible WHERE"
|
|
},
|
|
"subqueries": [
|
|
{
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"table": {
|
|
"message": "Impossible WHERE"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (d DECIMAL(10,2));
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
INSERT INTO t1 VALUES (5.37),(1.1);
|
|
CREATE TABLE t2 (d DECIMAL(10,2));
|
|
INSERT INTO t2 VALUES ('1.1'),('2.23');
|
|
SELECT * FROM v1 WHERE v1.d IN ( SELECT MIN(d) FROM t2 WHERE 0 );
|
|
d
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-11820: second execution of PS for query
|
|
# with false subquery predicate in WHERE
|
|
#
|
|
CREATE TABLE t1 (c VARCHAR(3)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('foo'),('bar');
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
CREATE TABLE t2 (a INT);
|
|
INSERT INTO t2 VALUES (3), (4);
|
|
PREPARE stmt1 FROM
|
|
" SELECT * FROM v1 WHERE 1 IN (SELECT a FROM t2) OR c = 'foo'";
|
|
PREPARE stmt2 FROM
|
|
"EXPLAIN FORMAT=JSON
|
|
SELECT * FROM v1 WHERE 1 IN (SELECT a FROM t2) OR c = 'foo'";
|
|
EXECUTE stmt1;
|
|
c
|
|
foo
|
|
EXECUTE stmt2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c = 'foo'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c = 'foo'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "1 = t2.a"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
INSERT INTO t2 SELECT a+1 FROM t2;
|
|
INSERT INTO t2 SELECT a+1 FROM t2;
|
|
INSERT INTO t2 SELECT a+1 FROM t2;
|
|
INSERT INTO t2 SELECT a+1 FROM t2;
|
|
INSERT INTO t2 SELECT a+1 FROM t2;
|
|
INSERT INTO t2 SELECT a+1 FROM t2;
|
|
EXECUTE stmt1;
|
|
c
|
|
foo
|
|
EXECUTE stmt2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "<cache>(<in_optimizer>(1,<exists>(subquery#2))) or v1.c = 'foo'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 128,
|
|
"filtered": 100,
|
|
"attached_condition": "1 = t2.a"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DEALLOCATE PREPARE stmt1;
|
|
DEALLOCATE PREPARE stmt2;
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-12373: pushdown into derived with side effects is prohibited
|
|
#
|
|
CREATE TABLE sales_documents (
|
|
id int NOT NULL AUTO_INCREMENT,
|
|
sale_id int NULL DEFAULT NULL,
|
|
type tinyint unsigned NULL DEFAULT NULL,
|
|
data text NULL DEFAULT NULL COLLATE 'utf8_unicode_ci',
|
|
date date NULL DEFAULT NULL,
|
|
order_number int unsigned NULL DEFAULT NULL,
|
|
created_at int NULL DEFAULT NULL,
|
|
updated_at int NULL DEFAULT NULL,
|
|
generated tinyint NOT NULL DEFAULT '0',
|
|
synced_at int NOT NULL DEFAULT '0',
|
|
sum decimal(13,2) NOT NULL DEFAULT '0',
|
|
PRIMARY KEY (id)
|
|
);
|
|
INSERT INTO sales_documents
|
|
(id, sale_id, type, order_number, data, created_at,
|
|
updated_at, date, generated, synced_at, sum)
|
|
VALUES
|
|
(555, 165, 3, 5, '{}', 1486538300, 1486722835, '2017-02-17', 0, 1486538313, 2320.00),
|
|
(556, 165, 2, 3, '{}', 1486538304, 1486563125, '2017-02-08', 1, 1486538302, 2320.00),
|
|
(557, 158, 2, 2, '{}', 1486538661, 1486538661, '2017-02-08', 0, 1486538660, 2320.00),
|
|
(558, 171, 1, 3, '{}', 1486539104, 1488203405, '2017-02-08', 1, 1486539102, 23230.00),
|
|
(559, 171, 2, 5, '{}', 1486549233, 1487146010, '2017-02-08', 1, 1486549225, 37690.00),
|
|
(560, 172, 1, 1, '{}', 1486658260, 1488203409, '2017-02-09', 1, 1486658256, 40312.00),
|
|
(561, 172, 2, 1, '{}', 1486711997, 1486711997, '2017-02-10', 1, 1486711996, 40312.00),
|
|
(562, 172, 3, 1, '{}', 1486712104, 1486721395, '2017-02-10', 1, 1486712101, 40312.00),
|
|
(563, 171, 3, 2, '{}', 1486712953, 1486720244, '2017-02-10', 1, 1486712910, 23230.00),
|
|
(564, 170, 1, 2, '{}', 1486715948, 1488203410, '2017-02-10', 1, 1486715930, 28873.00),
|
|
(565, 170, 3, 3, '{}', 1486716782, 1486717426, '2017-02-10', 1, 1486716779, 61948.00),
|
|
(566, 166, 3, 4, '{}', 1486720947, 1486720947, '2017-02-10', 1, 1486720945, 4640.00),
|
|
(567, 167, 3, 5, '{}', 1486722741, 1486722783, '2017-02-26', 0, 1486722738, 14755.00),
|
|
(568, 165, 1, 4, '{}', 1486722849, 1486722849, '2017-02-10', 0, 1486722846, 2320.00),
|
|
(569, 173, 2, 2, '{}', 1486723073, 1487071275, '2017-02-10', 1, 1486723071, 14282.00),
|
|
(570, 173, 1, 4, '{}', 1486723100, 1488203412, '2017-02-10', 1, 1486723099, 14282.00),
|
|
(571, 167, 2, 4, '{}', 1486730859, 1486730859, '2017-02-10', 1, 1486730856, 18655.00),
|
|
(572, 167, 1, 5, '{}', 1486730883, 1488203412, '2017-02-10', 1, 1486730877, 18655.00),
|
|
(573, 174, 2, 51, '{}', 1486731622, 1487060259, '2017-02-10', 1, 1486731620, 7140.00),
|
|
(574, 174, 3, 5, '{}', 1486993472, 1486993472, '2017-02-13', 1, 1488216147, 28020.00),
|
|
(575, 174, 1, 6, '{}', 1486993530, 1488203412, '2017-02-13', 1, 1486993505, 7140.00),
|
|
(576, 173, 3, 6, '{}', 1487071425, 1487071425, '2017-02-14', 0, 1487071422, 14282.00),
|
|
(577, 178, 2, 6, '{}', 1487327372, 1487327372, '2017-02-17', 1, 1487327370, 12321.00),
|
|
(578, 177, 2, 7, '{}', 1487327394, 1487327394, '2017-02-17', 0, 1487327391, 4270.00),
|
|
(579, 182, 3, 6, '{}', 1487750589, 1487751693, '2017-02-22', 1, 1487751688, 4270.00),
|
|
(580, 182, 2, 7, '{}', 1487750601, 1487750663, '2017-02-22', 1, 1487750598, 4270.00),
|
|
(581, 182, 1, 7, '{}', 1487750694, 1488203412, '2017-02-22', 1, 1487750692, 4270.00),
|
|
(582, 185, 3, 7, '{}', 1487774051, 1487774051, '2017-02-22', 0, 1487774043, 8913.00),
|
|
(583, 184, 3, 7, '{}', 1487774071, 1487774235, '2017-02-22', 0, 1487774093, 3285.00),
|
|
(584, 184, 2, 8, '{}', 1487774074, 1487774074, '2017-02-22', 0, 1487774073, 3285.00),
|
|
(585, 184, 1, 8, '{}', 1487774081, 1487774081, '2017-02-22', 0, 1487774075, 3285.00),
|
|
(586, 193, 2, 8, '{}', 1487955294, 1487955318, '2017-02-24', 0, 1487955311, 4270.00),
|
|
(587, 193, 1, 8, '{}', 1487955324, 1487955324, '2017-02-24', 0, 1487955320, 4270.00),
|
|
(588, 193, 3, 7, '{}', 1487955341, 1487955341, '2017-02-24', 0, 1487955325, 4270.00),
|
|
(589, 186, 1, 8, '{}', 1487957291, 1487957464, '2017-02-24', 0, 1487957459, 6960.00),
|
|
(590, 186, 2, 8, '{}', 1487957308, 1487957468, '2017-02-24', 0, 1487957465, 6960.00),
|
|
(591, 186, 3, 7, '{}', 1487957312, 1487957473, '2017-02-24', 0, 1487957469, 6960.00),
|
|
(592, 194, 1, 8, '{}', 1488193293, 1488203412, '2017-02-27', 1, 1488193280, 2320.00),
|
|
(593, 194, 2, 8, '{}', 1488193304, 1488193304, '2017-02-27', 1, 1488193303, 2320.00),
|
|
(594, 210, 1, 9, '{}', 1488198896, 1488198896, '2017-02-27', 0, 1488198885, 4270.00),
|
|
(595, 210, 2, 12, '{}', 1488198901, 1488198901, '2017-02-27', 1, 1488532585, 4270.00),
|
|
(596, 210, 3, 10, '{}', 1488198904, 1488198904, '2017-02-27', 1, 1488532565, 4270.00),
|
|
(597, 209, 2, 9, '{}', 1488200016, 1488450772, '2017-02-27', 1, 1488450449, 4270.00),
|
|
(598, 209, 1, 9, '{}', 1488200020, 1488200063, '2017-02-27', 1, 1488200017, 4271.00),
|
|
(599, 209, 3, 7, '{}', 1488200053, 1488200053, '2017-02-27', 0, 1488200021, 4271.00),
|
|
(600, 211, 2, 10, '{}', 1488216265, 1489402027, '2017-02-27', 1, 1488216264, 2320.00),
|
|
(601, 211, 3, 7, '{}', 1488216281, 1488216281, '2017-02-27', 1, 1488216276, 2320.00),
|
|
(602, 211, 1, 10, '{}', 1488216283, 1488216283, '2017-02-27', 1, 1488216282, 2320.00),
|
|
(603, 198, 2, 11, '{}', 1488280125, 1488280125, '2017-02-28', 0, 1488280095, 4270.00),
|
|
(604, 198, 1, 11, '{}', 1488280160, 1488280160, '2017-02-28', 0, 1488280126, 4270.00),
|
|
(605, 198, 3, 8, '{}', 1488280440, 1488280440, '2017-02-28', 0, 1488280435, 4270.00),
|
|
(606, 212, 1, 12, '{}', 1488286301, 1489402168, '2017-02-28', 1, 1488286295, 13825.00),
|
|
(607, 212, 3, 8, '{}', 1488289644, 1488289690, '2017-02-28', 1, 1488289642, 25295.00),
|
|
(608, 212, 2, 13, '{}', 1488290350, 1488290431, '2017-02-28', 1, 1488290347, 13133.75),
|
|
(609, 213, 1, 11, '{}', 1488529470, 1488529470, '2017-03-03', 1, 1488529461, 5660.00),
|
|
(610, 213, 2, 11, '{}', 1488529484, 1488529484, '2017-03-03', 1, 1488529479, 5660.00),
|
|
(611, 213, 3, 9, '{}', 1488529493, 1488529493, '2017-03-03', 1, 1488529489, 5660.00),
|
|
(612, 197, 2, 13, '{}', 1489400715, 1489400715, '2017-03-13', 0, 1489398959, 4270.00),
|
|
(613, 219, 3, 11, '{}', 1490084337, 1490181958, '2017-03-21', 1, 1490084334, 73526.00),
|
|
(614, 216, 3, 11, '{}', 1490085757, 1490086717, '2017-03-21', 0, 1490085755, 5377.00);
|
|
SELECT * FROM
|
|
(SELECT @row := @row + 1 as row, a.* from (
|
|
SELECT t.order_number
|
|
FROM sales_documents t
|
|
WHERE
|
|
t.type = 2 AND
|
|
t.date >= '2017-01-01' AND
|
|
t.date <= '2017-12-31' AND
|
|
t.order_number IS NOT NULL AND
|
|
t.generated = 1
|
|
GROUP BY t.order_number
|
|
) a, (SELECT @row := 0) r) t
|
|
WHERE row <> order_number;
|
|
row order_number
|
|
14 51
|
|
DROP TABLE sales_documents;
|
|
#
|
|
# MDEV-12845: pushdown from merged derived using equalities
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 values
|
|
(4), (8), (5), (3), (10), (2), (7);
|
|
create table t2 (b int, c int);
|
|
insert into t2 values
|
|
(2,1), (5,2), (2,2), (4,1), (4,3),
|
|
(5,3), (2,4), (4,6), (2,1);
|
|
create view v1 as
|
|
select b, sum(c) as s from t2 group by b;
|
|
create view v2 as
|
|
select distinct b, c from t2;
|
|
create view v3 as
|
|
select b, max(c) as m from t2 group by b;
|
|
select b
|
|
from ( select t1.a, v1.b, v1.s from t1, v1 where t1.a = v1.b ) as t
|
|
where b > 2;
|
|
b
|
|
4
|
|
5
|
|
explain format=json select b
|
|
from ( select t1.a, v1.b, v1.s from t1, v1 where t1.a = v1.b ) as t
|
|
where b > 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 2 and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"filesort": {
|
|
"sort_key": "t2.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
select a
|
|
from ( select t1.a, v1.b, v1.s from t1, v1 where t1.a = v1.b ) as t
|
|
where a > 2;
|
|
a
|
|
4
|
|
5
|
|
explain format=json select a
|
|
from ( select t1.a, v1.b, v1.s from t1, v1 where t1.a = v1.b ) as t
|
|
where a > 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 2 and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"filesort": {
|
|
"sort_key": "t2.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
select a
|
|
from ( select t1.a, v2.b, v2.c from t1, v2 where t1.a = v2.b ) as t
|
|
where a > 2;
|
|
a
|
|
4
|
|
4
|
|
4
|
|
5
|
|
5
|
|
explain format=json select a
|
|
from ( select t1.a, v2.b, v2.c from t1, v2 where t1.a = v2.b ) as t
|
|
where a > 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 2 and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
select a
|
|
from ( select t1.a, v3.b, v3.m from t1, v3 where t1.a = v3.m ) as t
|
|
where a > 2;
|
|
a
|
|
4
|
|
3
|
|
explain format=json select a
|
|
from ( select t1.a, v3.b, v3.m from t1, v3 where t1.a = v3.m ) as t
|
|
where a > 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 2 and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["m"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "m > 2",
|
|
"filesort": {
|
|
"sort_key": "t2.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1,v2,v3;
|
|
drop table t1,t2;
|
|
#
|
|
# MDEV-13166: pushdown from merged derived
|
|
#
|
|
CREATE TABLE t1 (i int) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE VIEW v1 AS SELECT MAX(i) AS f FROM t1;
|
|
SELECT * FROM ( SELECT * FROM v1 ) AS sq WHERE f > 0;
|
|
f
|
|
2
|
|
explain format=json SELECT * FROM ( SELECT * FROM v1 ) AS sq WHERE f > 0;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.f > 0",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "f > 0",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-13193: pushdown of equality extracted from multiple equality
|
|
#
|
|
CREATE TABLE t1 (i1 int, KEY(i1)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (i2 int) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (2),(4);
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
|
|
SELECT * FROM t1, ( SELECT * FROM v2 ) AS sq
|
|
WHERE i1 = 1 AND ( i1 = i2 OR i1 = 2 );
|
|
i1 i2
|
|
explain format=json SELECT * FROM t1, ( SELECT * FROM v2 ) AS sq
|
|
WHERE i1 = 1 AND ( i1 = i2 OR i1 = 2 );
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ref",
|
|
"possible_keys": ["i1"],
|
|
"key": "i1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["i1"],
|
|
"ref": ["const"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"using_index": true
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.i2 = 1"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "65",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.i2 = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v2;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-14237: derived with regexp_substr() in select list
|
|
#
|
|
create table t1 (a char(8));
|
|
insert into t1 values ('b'), ('a'), ('xx');
|
|
select *
|
|
from ( select distinct regexp_substr(t1.a,'^[A-Za-z]+') as f from t1) as t
|
|
where t.f = 'a' or t.f = 'b';
|
|
f
|
|
b
|
|
a
|
|
explain format=json select *
|
|
from ( select distinct regexp_substr(t1.a,'^[A-Za-z]+') as f from t1) as t
|
|
where t.f = 'a' or t.f = 'b';
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t.f = 'a' or t.f = 'b'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop table t1;
|
|
#
|
|
# MDEV-13454: consequence of mdev-14368 fixed for 5.5
|
|
#
|
|
SET sql_mode = 'ONLY_FULL_GROUP_BY';
|
|
create table t1 (id int, id2 int);
|
|
insert into t1 values (1,1),(2,3),(3,4),(7,2);
|
|
create table t2(id2 int);
|
|
insert t2 values (1),(2),(3);
|
|
SELECT * FROM t1
|
|
LEFT OUTER JOIN
|
|
(SELECT id2, COUNT(*) as ct FROM t2 GROUP BY id2) vc USING (id2)
|
|
WHERE (vc.ct>0);
|
|
id2 id ct
|
|
1 1 1
|
|
3 2 1
|
|
2 7 1
|
|
EXPLAIN FORMAT=JSON SELECT * FROM t1
|
|
LEFT OUTER JOIN
|
|
(SELECT id2, COUNT(*) as ct FROM t2 GROUP BY id2) vc USING (id2)
|
|
WHERE (vc.ct>0);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.id2 is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["id2"],
|
|
"ref": ["test.t1.id2"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "vc.ct > 0",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "ct > 0",
|
|
"filesort": {
|
|
"sort_key": "t2.id2",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
SET sql_mode = DEFAULT;
|
|
#
|
|
# MDEV-15579: incorrect removal of sub-formulas to be pushed
|
|
# into WHERE of materialized derived with GROUP BY
|
|
#
|
|
CREATE TABLE t1 (a INT, b INT, c INT, d INT);
|
|
CREATE TABLE t2 (x INT, y INT, z INT);
|
|
INSERT INTO t1 VALUES (1,1,66,1), (1,1,56,2), (3,2,42,3);
|
|
INSERT INTO t2 VALUES (1,1,66), (1,12,32);
|
|
SELECT *
|
|
FROM t2,
|
|
(
|
|
SELECT a, b, max(c) AS max_c
|
|
FROM t1
|
|
GROUP BY a
|
|
HAVING max_c > 37
|
|
) AS v1
|
|
WHERE (v1.a=1) AND (v1.b=v1.a) AND
|
|
(v1.a=t2.x) AND (v1.max_c>30);
|
|
x y z a b max_c
|
|
1 1 66 1 1 66
|
|
1 12 32 1 1 66
|
|
EXPLAIN SELECT *
|
|
FROM t2,
|
|
(
|
|
SELECT a, b, max(c) AS max_c
|
|
FROM t1
|
|
GROUP BY a
|
|
HAVING max_c > 37
|
|
) AS v1
|
|
WHERE (v1.a=1) AND (v1.b=v1.a) AND
|
|
(v1.a=t2.x) AND (v1.max_c>30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where
|
|
EXPLAIN FORMAT=JSON SELECT *
|
|
FROM t2,
|
|
(
|
|
SELECT a, b, max(c) AS max_c
|
|
FROM t1
|
|
GROUP BY a
|
|
HAVING max_c > 37
|
|
) AS v1
|
|
WHERE (v1.a=1) AND (v1.b=v1.a) AND
|
|
(v1.a=t2.x) AND (v1.max_c>30);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.x = 1"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1 and v1.b = 1 and v1.max_c > 30"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c > 37 and max_c > 30",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 and t1.b = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT *
|
|
FROM t2,
|
|
(
|
|
SELECT a, b, d, max(c) AS max_c
|
|
FROM t1
|
|
GROUP BY a,d
|
|
HAVING max_c > 37
|
|
) AS v1
|
|
WHERE (v1.a=1) AND (v1.b=v1.a) AND (v1.b=v1.d) AND
|
|
(v1.a=t2.x) AND (v1.max_c>30);
|
|
x y z a b d max_c
|
|
1 1 66 1 1 1 66
|
|
1 12 32 1 1 1 66
|
|
EXPLAIN SELECT *
|
|
FROM t2,
|
|
(
|
|
SELECT a, b, d, max(c) AS max_c
|
|
FROM t1
|
|
GROUP BY a,d
|
|
HAVING max_c > 37
|
|
) AS v1
|
|
WHERE (v1.a=1) AND (v1.b=v1.a) AND (v1.b=v1.d) AND
|
|
(v1.a=t2.x) AND (v1.max_c>30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where
|
|
EXPLAIN FORMAT=JSON SELECT *
|
|
FROM t2,
|
|
(
|
|
SELECT a, b, d, max(c) AS max_c
|
|
FROM t1
|
|
GROUP BY a,d
|
|
HAVING max_c > 37
|
|
) AS v1
|
|
WHERE (v1.a=1) AND (v1.b=v1.a) AND (v1.b=v1.d) AND
|
|
(v1.a=t2.x) AND (v1.max_c>30);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.x = 1"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 1 and v1.b = 1 and v1.d = 1 and v1.max_c > 30"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c > 37 and max_c > 30",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 1 and t1.b = 1 and t1.d = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-15765: pushing condition with temporal constants
|
|
# into constant tables
|
|
#
|
|
select * from (select date('2018-01-01') as d
|
|
union all
|
|
select date('2018-01-01') as d) as t
|
|
where t.d between date ('2017-01-01') and date ('2019-01-01');
|
|
d
|
|
2018-01-01
|
|
2018-01-01
|
|
select * from (select date('2018-01-01') as d) as t
|
|
where t.d between date ('2017-01-01') and date ('2019-01-01');
|
|
d
|
|
2018-01-01
|
|
#
|
|
# MDEV-16088: pushdown into derived defined in the IN subquery
|
|
#
|
|
CREATE TABLE t1 (a INT, b INT);
|
|
CREATE TABLE t2 (e INT, f INT, g INT);
|
|
INSERT INTO t1 VALUES (1,14),(2,13),(1,19),(2,32),(3,24);
|
|
INSERT INTO t2 VALUES (1,19,2),(3,24,1),(1,12,2),(3,11,3),(2,32,1);
|
|
SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e,d_tab.max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) AS max_f
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
HAVING max_f>18
|
|
) as d_tab
|
|
WHERE d_tab.e>1
|
|
)
|
|
;
|
|
a b
|
|
2 32
|
|
3 24
|
|
EXPLAIN SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e,d_tab.max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) AS max_f
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
HAVING max_f>18
|
|
) as d_tab
|
|
WHERE d_tab.e>1
|
|
)
|
|
;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
|
|
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1)
|
|
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
|
|
EXPLAIN FORMAT=JSON SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e,d_tab.max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) AS max_f
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
HAVING max_f>18
|
|
) as d_tab
|
|
WHERE d_tab.e>1
|
|
)
|
|
;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "10",
|
|
"used_key_parts": ["e", "max_f"],
|
|
"ref": ["test.t1.a", "test.t1.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"first_match": "t1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_f > 18",
|
|
"filesort": {
|
|
"sort_key": "t2.e",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.e > 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e,d_tab.max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) AS max_f
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
HAVING max_f>18
|
|
) as d_tab
|
|
WHERE d_tab.max_f<25
|
|
)
|
|
;
|
|
a b
|
|
1 19
|
|
3 24
|
|
EXPLAIN SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e,d_tab.max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) AS max_f
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
HAVING max_f>18
|
|
) as d_tab
|
|
WHERE d_tab.max_f<25
|
|
)
|
|
;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
|
|
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1)
|
|
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
|
|
EXPLAIN FORMAT=JSON SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e,d_tab.max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) AS max_f
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
HAVING max_f>18
|
|
) as d_tab
|
|
WHERE d_tab.max_f<25
|
|
)
|
|
;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b < 25 and t1.a is not null and t1.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "10",
|
|
"used_key_parts": ["e", "max_f"],
|
|
"ref": ["test.t1.a", "test.t1.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"first_match": "t1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_f > 18 and max_f < 25",
|
|
"filesort": {
|
|
"sort_key": "t2.e",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e, MAX(d_tab.max_f) AS max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) as max_f, t2.g
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
) as d_tab
|
|
WHERE d_tab.e>1
|
|
GROUP BY d_tab.g
|
|
)
|
|
;
|
|
a b
|
|
2 32
|
|
EXPLAIN SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e, MAX(d_tab.max_f) AS max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) as max_f, t2.g
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
) as d_tab
|
|
WHERE d_tab.e>1
|
|
GROUP BY d_tab.g
|
|
)
|
|
;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1
|
|
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 5 Using where; Using temporary
|
|
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
|
|
EXPLAIN FORMAT=JSON SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e, MAX(d_tab.max_f) AS max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) as max_f, t2.g
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
) as d_tab
|
|
WHERE d_tab.e>1
|
|
GROUP BY d_tab.g
|
|
)
|
|
;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a is not null and t1.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery2>",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["distinct_key"],
|
|
"key": "distinct_key",
|
|
"key_length": "8",
|
|
"used_key_parts": ["e", "max_f"],
|
|
"ref": ["test.t1.a", "test.t1.b"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "d_tab.e > 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"filesort": {
|
|
"sort_key": "t2.e",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.e > 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e, MAX(d_tab.max_f) AS max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) as max_f, t2.g
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
) as d_tab
|
|
WHERE d_tab.max_f>20
|
|
GROUP BY d_tab.g
|
|
)
|
|
;
|
|
a b
|
|
2 32
|
|
EXPLAIN SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e, MAX(d_tab.max_f) AS max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) as max_f, t2.g
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
) as d_tab
|
|
WHERE d_tab.max_f>20
|
|
GROUP BY d_tab.g
|
|
)
|
|
;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1
|
|
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 5 Using where; Using temporary
|
|
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
|
|
EXPLAIN FORMAT=JSON SELECT * FROM t1
|
|
WHERE (t1.a,t1.b) IN
|
|
(
|
|
SELECT d_tab.e, MAX(d_tab.max_f) AS max_f
|
|
FROM (
|
|
SELECT t2.e, MAX(t2.f) as max_f, t2.g
|
|
FROM t2
|
|
GROUP BY t2.e
|
|
) as d_tab
|
|
WHERE d_tab.max_f>20
|
|
GROUP BY d_tab.g
|
|
)
|
|
;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a is not null and t1.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery2>",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["distinct_key"],
|
|
"key": "distinct_key",
|
|
"key_length": "8",
|
|
"used_key_parts": ["e", "max_f"],
|
|
"ref": ["test.t1.a", "test.t1.b"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "d_tab.max_f > 20",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "max_f > 20",
|
|
"filesort": {
|
|
"sort_key": "t2.e",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-15765: pushing condition with IN subquery defined with constants
|
|
# using substitution
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
SELECT * FROM
|
|
(
|
|
SELECT DISTINCT * FROM t1
|
|
) der_tab
|
|
WHERE (a>0 AND a<2 OR a IN (2,3)) AND
|
|
(a=2 OR 0);
|
|
a
|
|
2
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-16386: pushing condition into the HAVING clause when ambiguous
|
|
# fields warning appears
|
|
#
|
|
CREATE TABLE t1 (a INT, b INT);
|
|
INSERT INTO t1 VALUES (1,2),(2,3),(3,4);
|
|
SELECT * FROM
|
|
(
|
|
SELECT t1.b AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) dt
|
|
WHERE (dt.a=2);
|
|
a
|
|
2
|
|
EXPLAIN FORMAT=JSON SELECT * FROM
|
|
(
|
|
SELECT t1.b AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) dt
|
|
WHERE (dt.a=2);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.a = 2",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "a = 2",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM
|
|
(
|
|
SELECT t1.b AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
HAVING (t1.a<3)
|
|
) dt
|
|
WHERE (dt.a>1);
|
|
a
|
|
2
|
|
3
|
|
EXPLAIN FORMAT=JSON SELECT * FROM
|
|
(
|
|
SELECT t1.b AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
HAVING (t1.a<3)
|
|
) dt
|
|
WHERE (dt.a>1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.a > 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "a > 1",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM
|
|
(
|
|
SELECT 'ab' AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) dt
|
|
WHERE (dt.a='ab');
|
|
a
|
|
ab
|
|
ab
|
|
ab
|
|
EXPLAIN FORMAT=JSON SELECT * FROM
|
|
(
|
|
SELECT 'ab' AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) dt
|
|
WHERE (dt.a='ab');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.a = 'ab'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM
|
|
(
|
|
SELECT 1 AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) dt
|
|
WHERE (dt.a=1);
|
|
a
|
|
1
|
|
1
|
|
1
|
|
EXPLAIN FORMAT=JSON SELECT * FROM
|
|
(
|
|
SELECT 1 AS a
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) dt
|
|
WHERE (dt.a=1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.a = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-16517: pushdown condition with the IN predicate defined
|
|
# with non-constant values
|
|
#
|
|
CREATE TABLE t1 (a INT, b INT);
|
|
INSERT INTO t1 VALUES (1,2),(1,3);
|
|
SELECT * FROM
|
|
(
|
|
SELECT t1.a
|
|
FROM t1
|
|
WHERE 1 IN (0,t1.a)
|
|
GROUP BY t1.a
|
|
) AS dt1
|
|
JOIN
|
|
(
|
|
SELECT t1.a
|
|
FROM t1
|
|
WHERE 1 IN (0,t1.a)
|
|
) AS dt2
|
|
ON dt1.a = dt2.a;
|
|
a a
|
|
1 1
|
|
1 1
|
|
EXPLAIN FORMAT=JSON SELECT * FROM
|
|
(
|
|
SELECT t1.a
|
|
FROM t1
|
|
WHERE 1 IN (0,t1.a)
|
|
GROUP BY t1.a
|
|
) AS dt1
|
|
JOIN
|
|
(
|
|
SELECT t1.a
|
|
FROM t1
|
|
WHERE 1 IN (0,t1.a)
|
|
) AS dt2
|
|
ON dt1.a = dt2.a;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "1 in (0,t1.a) and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "1 in (0,t1.a) and 1 in (0,t1.a)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM
|
|
(
|
|
SELECT t1.a,MAX(t1.b)
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) AS dt, t1
|
|
WHERE dt.a=t1.a AND dt.a IN (1,t1.a);
|
|
a MAX(t1.b) a b
|
|
1 3 1 2
|
|
1 3 1 3
|
|
EXPLAIN FORMAT=JSON SELECT * FROM
|
|
(
|
|
SELECT t1.a,MAX(t1.b)
|
|
FROM t1
|
|
GROUP BY t1.a
|
|
) AS dt, t1
|
|
WHERE dt.a=t1.a AND dt.a IN (1,t1.a);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a in (1,t1.a) and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a in (1,t1.a)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-15087: error from inexpensive subquery before check
|
|
# for condition pushdown into derived
|
|
#
|
|
CREATE TABLE t1 (i1 int, v1 varchar(1));
|
|
INSERT INTO t1 VALUES (7,'x');
|
|
CREATE TABLE t2 (i1 int);
|
|
INSERT INTO t2 VALUES (8);
|
|
CREATE TABLE t3 (i1 int ,v1 varchar(1), v2 varchar(1));
|
|
INSERT INTO t3 VALUES (4, 'v','v'),(62,'v','k'),(7, 'n', NULL);
|
|
SELECT 1
|
|
FROM (t1 AS a1
|
|
JOIN (((SELECT DISTINCT t3.*
|
|
FROM t3) AS a2
|
|
JOIN t1 ON (t1.v1 = a2.v2))) ON (t1.v1 = a2.v1))
|
|
WHERE (SELECT BIT_COUNT(t2.i1)
|
|
FROM (t2 JOIN t3)) IS NULL;
|
|
ERROR 21000: Subquery returns more than 1 row
|
|
DROP TABLE t1, t2, t3;
|
|
#
|
|
# MDEV-16614 signal 7 after calling stored procedure, that uses regexp
|
|
#
|
|
CREATE PROCEDURE p1(m1 varchar(5), m2 varchar(5))
|
|
BEGIN
|
|
SELECT a FROM
|
|
(SELECT "aa" a) t
|
|
JOIN (SELECT "aa" b) t1 on t.a=t1.b
|
|
WHERE t.a regexp m1 and t1.b regexp m2
|
|
GROUP BY a;
|
|
END$$
|
|
CALL p1('a','a');
|
|
a
|
|
aa
|
|
DROP PROCEDURE p1;
|
|
CREATE PROCEDURE p1(m1 varchar(5))
|
|
BEGIN
|
|
SELECT a FROM (SELECT "aa" a) t WHERE t.a regexp m1;
|
|
END$$
|
|
CALL p1('a');
|
|
a
|
|
aa
|
|
DROP PROCEDURE p1;
|
|
SELECT a FROM (SELECT "aa" a) t WHERE REGEXP_INSTR(t.a, (SELECT MAX('aa') FROM DUAL LIMIT 1));
|
|
a
|
|
aa
|
|
CREATE OR REPLACE FUNCTION f1(a VARCHAR(10), b VARCHAR(10)) RETURNS INT
|
|
BEGIN
|
|
RETURN 1;
|
|
END;$$
|
|
CREATE OR REPLACE PROCEDURE p1(m1 varchar(5))
|
|
BEGIN
|
|
SELECT a FROM (SELECT "aa" a) t WHERE f1(t.a, m1);
|
|
END$$
|
|
CALL p1('a');
|
|
a
|
|
aa
|
|
DROP PROCEDURE p1;
|
|
DROP FUNCTION f1;
|
|
CREATE OR REPLACE FUNCTION f1(a VARCHAR(10), b VARCHAR(10)) RETURNS INT
|
|
BEGIN
|
|
RETURN 1;
|
|
END;$$
|
|
SELECT a FROM (SELECT "aa" a) t WHERE f1(t.a, (SELECT MAX('aa') FROM DUAL LIMIT 1));
|
|
a
|
|
aa
|
|
DROP FUNCTION f1;
|
|
#
|
|
# MDEV-17011: condition pushdown into materialized derived used
|
|
# in INSERT SELECT, multi-table UPDATE and DELETE
|
|
#
|
|
CREATE TABLE t1 (a int ,b int) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
(1, 1), (1, 2), (2, 1), (2, 2), (3,1), (3,3), (4,2);
|
|
CREATE TABLE t2 (a int) ENGINE MYISAM;
|
|
INSERT INTO t2 VALUES
|
|
(3), (7), (1), (4), (1);
|
|
CREATE TABLE t3 (a int, b int) ENGINE MYISAM;
|
|
EXPLAIN FORMAT=JSON INSERT INTO t3
|
|
SELECT * FROM (SELECT a, count(*) as c FROM t1 GROUP BY a) t WHERE a<=2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a <= 2",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a <= 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
INSERT INTO t3
|
|
SELECT * FROM (SELECT a, count(*) as c FROM t1 GROUP BY a) t WHERE a<=2;
|
|
SELECT * FROM t3;
|
|
a b
|
|
1 2
|
|
2 2
|
|
EXPLAIN FORMAT=JSON UPDATE t2, (SELECT a, count(*) as c FROM t1 GROUP BY a) t SET t2.a=t.c+10
|
|
WHERE t2.a= t.c and t.a>=3;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "8",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = t.c and t.a >= 3",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a >= 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
UPDATE t2, (SELECT a, count(*) as c FROM t1 GROUP BY a) t SET t2.a=t.c+10
|
|
WHERE t2.a= t.c and t.a>=3;
|
|
SELECT * FROM t2;
|
|
a
|
|
3
|
|
7
|
|
11
|
|
4
|
|
11
|
|
EXPLAIN FORMAT=JSON DELETE t2 FROM t2, (SELECT a, count(*) as c FROM t1 GROUP BY a) t
|
|
WHERE t2.a= t.c+9 and t.a=2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a = 2 and t2.a = t.c + 9",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DELETE t2 FROM t2, (SELECT a, count(*) as c FROM t1 GROUP BY a) t
|
|
WHERE t2.a= t.c+9 and t.a=2;
|
|
SELECT * FROM t2;
|
|
a
|
|
3
|
|
7
|
|
4
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# MDEV-16765: pushdown condition with the CASE structure
|
|
# defined with Item_cond item
|
|
#
|
|
CREATE TABLE t1(a INT, b INT);
|
|
INSERT INTO t1 VALUES (1,2), (3,4), (2,3);
|
|
SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.max_a=1) OR (tab2.max_a=2))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
max_a b
|
|
1 2
|
|
1 3
|
|
EXPLAIN FORMAT=JSON SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.max_a=1) OR (tab2.max_a=2))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "case when tab2.max_a = 1 or tab2.max_a = 2 then 1 else 0 end = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "case when max_a = 1 or max_a = 2 then 1 else 0 end = 1",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.max_a=1) OR ((tab2.max_a>2) AND (tab2.max_a<4)))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
max_a b
|
|
1 2
|
|
1 4
|
|
EXPLAIN FORMAT=JSON SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.max_a=1) OR ((tab2.max_a>2) AND (tab2.max_a<4)))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "case when tab2.max_a = 1 or tab2.max_a > 2 and tab2.max_a < 4 then 1 else 0 end = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "case when max_a = 1 or max_a > 2 and max_a < 4 then 1 else 0 end = 1",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.max_a>1) AND ((tab2.max_a=2) OR (tab2.max_a>2)))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
max_a b
|
|
1 3
|
|
1 4
|
|
EXPLAIN FORMAT=JSON SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.max_a>1) AND ((tab2.max_a=2) OR (tab2.max_a>2)))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "case when tab2.max_a > 1 and (tab2.max_a = 2 or tab2.max_a > 2) then 1 else 0 end = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "case when max_a > 1 and (max_a = 2 or max_a > 2) then 1 else 0 end = 1",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.b=2) OR (tab2.b=4))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
max_a b
|
|
1 2
|
|
1 4
|
|
EXPLAIN FORMAT=JSON SELECT *
|
|
FROM
|
|
(
|
|
SELECT CASE WHEN ((tab2.b=2) OR (tab2.b=4))
|
|
THEN 1 ELSE 0 END AS max_a,b
|
|
FROM (SELECT MAX(a) as max_a,b FROM t1 GROUP BY t1.b) AS tab2
|
|
) AS tab1
|
|
WHERE (tab1.max_a=1);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "case when tab2.b = 2 or tab2.b = 4 then 1 else 0 end = 1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "case when t1.b = 2 or t1.b = 4 then 1 else 0 end = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-16803: pushdown condition with IN predicate in the derived table
|
|
# defined with several SELECT statements
|
|
#
|
|
CREATE TABLE t1 (a INT, b INT);
|
|
INSERT INTO t1 VALUES (1,2),(3,2),(1,1);
|
|
SELECT * FROM
|
|
(
|
|
SELECT a,b,1 as c
|
|
FROM t1
|
|
UNION ALL
|
|
SELECT a,b,2 as c
|
|
FROM t1
|
|
) AS tab
|
|
WHERE ((a,b) IN ((1,2),(3,2)));
|
|
a b c
|
|
1 2 1
|
|
3 2 1
|
|
1 2 2
|
|
3 2 2
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-17354: INSERT SELECT with condition pushdown into derived
|
|
#
|
|
CREATE TABLE t1 (f INT NOT NULL);
|
|
INSERT INTO t1 VALUES (3), (7), (3);
|
|
CREATE ALGORITHM= TEMPTABLE VIEW v1 AS SELECT * FROM ( SELECT * FROM t1 ) AS sq;
|
|
INSERT INTO t1
|
|
SELECT * FROM ( SELECT t1.f FROM v1 JOIN t1 ) AS t WHERE f IS NOT NULL;
|
|
EXPLAIN INSERT INTO t1
|
|
SELECT * FROM ( SELECT t1.f FROM v1 JOIN t1 ) AS t WHERE f IS NOT NULL;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 144 Using where
|
|
2 DERIVED <derived4> ALL NULL NULL NULL NULL 12
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 12
|
|
EXPLAIN FORMAT=JSON INSERT INTO t1
|
|
SELECT * FROM ( SELECT t1.f FROM v1 JOIN t1 ) AS t WHERE f IS NOT NULL;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 144,
|
|
"filtered": 100,
|
|
"attached_condition": "t.f is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f is not null"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "64",
|
|
"join_type": "BNL"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM t1;
|
|
f
|
|
3
|
|
7
|
|
3
|
|
3
|
|
3
|
|
3
|
|
7
|
|
7
|
|
7
|
|
3
|
|
3
|
|
3
|
|
DELETE FROM t1;
|
|
INSERT INTO t1 VALUES (3), (7), (3);
|
|
INSERT INTO t1
|
|
SELECT * FROM ( SELECT t1.f FROM v1 JOIN t1 ON v1.f=t1.f) AS t
|
|
WHERE f IS NOT NULL;
|
|
EXPLAIN FORMAT=JSON INSERT INTO t1
|
|
SELECT * FROM ( SELECT t1.f FROM v1 JOIN t1 ON v1.f=t1.f) AS t
|
|
WHERE f IS NOT NULL;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 16,
|
|
"filtered": 100,
|
|
"attached_condition": "t.f is not null",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 8,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "4",
|
|
"used_key_parts": ["f"],
|
|
"ref": ["test.t1.f"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 8,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f is not null"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM t1;
|
|
f
|
|
3
|
|
7
|
|
3
|
|
3
|
|
3
|
|
7
|
|
3
|
|
3
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-17574: pushdown into derived from mergeable view
|
|
# used in multi-table UPDATE
|
|
# pushdown into materialized derived from mergeable view
|
|
# used in SELECT
|
|
#
|
|
CREATE TABLE t1 (f1 text, f2 int);
|
|
INSERT INTO t1 VALUES ('x',1), ('y',2);
|
|
CREATE VIEW v1 AS SELECT f2 FROM ( SELECT f2 FROM t1 ) AS t;
|
|
UPDATE v1, t1 SET t1.f1 = 'z' WHERE v1.f2 < 2 AND t1.f2 = v1.f2;
|
|
EXPLAIN FORMAT=JSON UPDATE v1, t1 SET t1.f1 = 'z' WHERE v1.f2 < 2 AND t1.f2 = v1.f2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f2 < 2 and t1.f2 is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["f2"],
|
|
"ref": ["test.t1.f2"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f2 < 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * FROM t1;
|
|
f1 f2
|
|
z 1
|
|
y 2
|
|
CREATE VIEW v2 AS SELECT f2 FROM ( SELECT DISTINCT f2 FROM t1 ) AS t;
|
|
SELECT * FROM v2, t1 WHERE v2.f2 < 2 AND t1.f2 = v2.f2;
|
|
f2 f1 f2
|
|
1 z 1
|
|
EXPLAIN FORMAT=JSON SELECT * FROM v2, t1 WHERE v2.f2 < 2 AND t1.f2 = v2.f2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f2 < 2 and t1.f2 is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["f2"],
|
|
"ref": ["test.t1.f2"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f2 < 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1,v2;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-18383: pushdown condition with the IF structure
|
|
# defined with Item_cond item
|
|
#
|
|
CREATE TABLE t1(a INT, b INT);
|
|
CREATE TABLE t2(c INT, d INT);
|
|
INSERT INTO t1 VALUES (1,2),(3,4),(5,6);
|
|
INSERT INTO t2 VALUES (1,3),(3,7),(5,1);
|
|
SELECT *
|
|
FROM t1,
|
|
(
|
|
SELECT MAX(d) AS max_d,c
|
|
FROM t2
|
|
GROUP BY c
|
|
) AS tab
|
|
WHERE t1.a=tab.c AND
|
|
IF(2,t1.a=1 OR t1.b>5,1=1);
|
|
a b max_d c
|
|
1 2 3 1
|
|
5 6 1 5
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-19139: pushdown condition with Item_func_set_user_var
|
|
#
|
|
CREATE TABLE t1 (a INT, b INT);
|
|
CREATE VIEW v1 AS SELECT a, MAX(b) FROM t1 GROUP BY a;
|
|
SELECT * FROM (SELECT 1 FROM v1 UNION (SELECT 1 FROM v1 WHERE @a := uuid())) dt;
|
|
1
|
|
EXPLAIN FORMAT=JSON
|
|
SELECT * FROM (SELECT 1 FROM v1 UNION (SELECT 1 FROM v1 WHERE @a := uuid())) dt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"table": {
|
|
"message": "no matching row in const table"
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"message": "no matching row in const table"
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP TABLE t1;
|
|
DROP VIEW v1;
|
|
#
|
|
# MDEV-21388 Wrong result of DAYNAME()=xxx in combination with condition_pushdown_for_derived=on
|
|
#
|
|
CREATE TABLE t1 (a INT, b DATE, c INT);
|
|
INSERT INTO t1 VALUES
|
|
(1,'2001-01-21',345),
|
|
(6,'2001-01-20',315),
|
|
(6,'2001-01-20',214);
|
|
CREATE TABLE t2 (a INT, b INT);
|
|
INSERT INTO t2 VALUES (2,19), (7,20);
|
|
CREATE VIEW v1 AS SELECT a, b, max(c) AS max_c FROM t1
|
|
GROUP BY a,b HAVING max_c < 707;
|
|
SELECT *, dayname(v1.b) FROM v1,t2 WHERE (v1.max_c>214) AND (t2.a>v1.a);
|
|
a b max_c a b dayname(v1.b)
|
|
1 2001-01-21 345 2 19 Sunday
|
|
1 2001-01-21 345 7 20 Sunday
|
|
6 2001-01-20 315 7 20 Saturday
|
|
SET optimizer_switch='condition_pushdown_for_derived=off';
|
|
SELECT *, dayname(v1.b) FROM v1,t2 WHERE (v1.max_c>214) AND (t2.a>v1.a) AND dayname(v1.b)='Sunday';
|
|
a b max_c a b dayname(v1.b)
|
|
1 2001-01-21 345 2 19 Sunday
|
|
1 2001-01-21 345 7 20 Sunday
|
|
SET optimizer_switch='condition_pushdown_for_derived=on';
|
|
SELECT *, dayname(v1.b) FROM v1,t2 WHERE (v1.max_c>214) AND (t2.a>v1.a) AND dayname(v1.b)='Sunday';
|
|
a b max_c a b dayname(v1.b)
|
|
1 2001-01-21 345 2 19 Sunday
|
|
1 2001-01-21 345 7 20 Sunday
|
|
DROP VIEW v1;
|
|
DROP TABLE t1, t2;
|
|
SET optimizer_switch=DEFAULT;
|
|
#
|
|
# MDEV-17177: an attempt to push down IN predicate when one of
|
|
# the arguments is too complex to be cloned
|
|
#
|
|
CREATE TABLE t1 (a VARCHAR(8));
|
|
INSERT INTO t1 VALUES ('abc'),('def');
|
|
CREATE VIEW v1 AS SELECT * FROM t1 GROUP BY a;
|
|
SELECT * FROM v1 WHERE IF( a REGEXP 'def', 'foo', a ) IN ('abc', 'foobar');
|
|
a
|
|
abc
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-19179: pushdown into UNION of aggregation selects whose
|
|
# corresponding columns have different names
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 values (3), (7), (1);
|
|
select *
|
|
from (select min(a) as x from t1 union all select max(a) as y from t1) t
|
|
where x>0;
|
|
x
|
|
1
|
|
7
|
|
explain extended select *
|
|
from (select min(a) as x from t1 union all select max(a) as y from t1) t
|
|
where x>0;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 3 100.00
|
|
3 UNION t1 ALL NULL NULL NULL NULL 3 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `t`.`x` AS `x` from (/* select#2 */ select min(`test`.`t1`.`a`) AS `x` from `test`.`t1` having `x` > 0 union all /* select#3 */ select max(`test`.`t1`.`a`) AS `x` from `test`.`t1` having `x` > 0) `t` where `t`.`x` > 0
|
|
prepare stmt from "select *
|
|
from (select min(a) as x from t1 union all select max(a) as y from t1) t
|
|
where x>0";
|
|
execute stmt;
|
|
x
|
|
1
|
|
7
|
|
execute stmt;
|
|
x
|
|
1
|
|
7
|
|
deallocate prepare stmt;
|
|
create view v1(m) as
|
|
select min(a) as x from t1 union all select max(a) as y from t1;
|
|
select * from v1 where m > 0;
|
|
m
|
|
1
|
|
7
|
|
drop view v1;
|
|
drop table t1;
|
|
#
|
|
# MDEV-25635: pushdown into grouping view using aggregate functions
|
|
# with constant arguments via a mergeable derived table
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 values (3), (7), (1), (3), (7), (7), (3);
|
|
create view v1 as select a, sum(1) as f, sum(1) as g from t1 group by a;
|
|
select * from v1;
|
|
a f g
|
|
1 1 1
|
|
3 3 3
|
|
7 3 3
|
|
select * from (select * from v1) as dt where a=f and a=g;
|
|
a f g
|
|
1 1 1
|
|
3 3 3
|
|
explain extended select * from (select * from v1) as dt where a=f and a=g;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 7 100.00 Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `v1`.`a` AS `a`,`v1`.`f` AS `f`,`v1`.`g` AS `g` from `test`.`v1` where `v1`.`a` = `v1`.`f` and `v1`.`a` = `v1`.`g`
|
|
create view v2 as select a, min(1) as f, min(1) as g from t1 group by a;
|
|
select * from v2;
|
|
a f g
|
|
1 1 1
|
|
3 1 1
|
|
7 1 1
|
|
select * from (select * from v2) as dt where a=f and a=g;
|
|
a f g
|
|
1 1 1
|
|
explain extended select * from (select * from v2) as dt where a=f and a=g;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 7 100.00 Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `v2`.`a` AS `a`,`v2`.`f` AS `f`,`v2`.`g` AS `g` from `test`.`v2` where `v2`.`a` = `v2`.`f` and `v2`.`a` = `v2`.`g`
|
|
drop view v1,v2;
|
|
drop table t1;
|
|
#
|
|
# MDEV-25969: Condition pushdown into derived table doesn't work if select list uses SP
|
|
#
|
|
create function f1(a int) returns int DETERMINISTIC return (a+1);
|
|
create table t1 (
|
|
pk int primary key,
|
|
a int,
|
|
b int,
|
|
key(a)
|
|
);
|
|
create table t2(a int);
|
|
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t3(a int);
|
|
insert into t3 select A.a + B.a* 10 + C.a * 100 from t2 A, t2 B, t2 C;
|
|
insert into t1 select a,a,a from t3;
|
|
create view v1 as
|
|
select
|
|
t1.a as col1,
|
|
f1(t1.b) as col2
|
|
from
|
|
t1;
|
|
create view v2 as
|
|
select
|
|
t1.a as col1,
|
|
f1(t1.b) as col2
|
|
from
|
|
t1;
|
|
create view v3 as
|
|
select col2, col1 from v1
|
|
union all
|
|
select col2, col1 from v2;
|
|
explain select * from v3 where col1=123;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using where
|
|
2 DERIVED t1 ref a a 5 const 1
|
|
3 UNION t1 ref a a 5 const 1
|
|
# This must use ref accesses for reading table t1, not full scans:
|
|
explain format=json
|
|
select * from v3 where col1=123 and col2=321;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v3.col1 = 123 and v3.col2 = 321",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["const"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["const"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop function f1;
|
|
drop view v1,v2,v3;
|
|
drop table t1, t2,t3;
|
|
#
|
|
# Another testcase, with pushdown through GROUP BY
|
|
#
|
|
create table t1 (a int, b int);
|
|
insert into t1 values (1,1),(2,2),(3,3);
|
|
create function f1(a int) returns int DETERMINISTIC return (a+1);
|
|
create view v2(a, a2, s) as
|
|
select a, f1(a), sum(b) from t1 group by a, f1(a);
|
|
# Here,
|
|
# "(s+1) > 10" will be pushed into HAVING
|
|
# "a > 1" will be pushed all the way to the table scan on t1
|
|
# "a2>123" will be pushed into HAVING (as it refers to an SP call which
|
|
# prevents pushing it to the WHERE)
|
|
explain format=json
|
|
select * from v2 where (s+1) > 10 AND a > 1 and a2>123;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.s + 1 > 10 and v2.a > 1 and v2.a2 > 123",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "s + 1 > 10 and a2 > 123",
|
|
"filesort": {
|
|
"sort_key": "t1.a, f1(t1.a)",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# Extra test for 10.4+: Check that this works for pushdown into IN
|
|
# subqueries:
|
|
create table t4 (a int, b int, c decimal);
|
|
insert into t4 select a,a,a from t1;
|
|
# The subquery must be materialized and must have
|
|
# "attached_condition": "t1.a + 1 > 10",
|
|
# "having_condition": "`f1(a)` > 1 and `sum(b)` > 123",
|
|
explain format=json
|
|
select *
|
|
from t4
|
|
where
|
|
(a,b,c) in (select a, f1(a), sum(b) from t1 group by a, f1(a))
|
|
and
|
|
(a+1) > 10 AND b > 1 and c>123;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t4.a + 1 > 10 and t4.b > 1 and t4.c > 123 and t4.a is not null and t4.b is not null and t4.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery2>",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["distinct_key"],
|
|
"key": "distinct_key",
|
|
"key_length": "23",
|
|
"used_key_parts": ["a", "f1(a)", "sum(b)"],
|
|
"ref": ["test.t4.a", "test.t4.b", "test.t4.c"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "t4.c = `<subquery2>`.`sum(b)`",
|
|
"materialized": {
|
|
"unique": 1,
|
|
"materialization": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "`f1(a)` > 1 and `sum(b)` > 123",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a + 1 > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v2;
|
|
drop function f1;
|
|
drop table t1, t4;
|
|
# End of 10.2 tests
|
|
#
|
|
# MDEV-14579: pushdown conditions into materialized views/derived tables
|
|
# that are defined with EXIST or/and INTERSECT
|
|
#
|
|
create table t1 (a int, b int, c int);
|
|
create table t2 (a int, b int, c int);
|
|
insert into t1 values
|
|
(1,21,345), (1,33,7), (8,33,114), (1,21,500), (1,19,117), (5,14,787),
|
|
(8,33,123), (9,10,211), (5,16,207), (1,33,988), (5,27,132), (1,21,104),
|
|
(6,20,309), (6,20,315), (1,21,101), (4,33,404), (9,10,800), (1,21,123);
|
|
insert into t2 values
|
|
(2,3,207), (1,16,909), (5,14,312),
|
|
(5,33,207), (6,20,211), (1,19,132),
|
|
(8,33,117), (3,21,231), (6,23,303);
|
|
create view v1 as
|
|
select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c < 300
|
|
intersect
|
|
select a, b, min(c) as c from t1
|
|
where t1.b>10 group by a,b having c > 100;
|
|
# using intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
a b c a b c
|
|
1 21 101 1 16 909
|
|
1 19 117 1 16 909
|
|
1 21 101 1 19 132
|
|
1 19 117 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
a b c a b c
|
|
1 21 101 1 16 909
|
|
1 19 117 1 16 909
|
|
1 21 101 1 19 132
|
|
1 19 117 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a=8);
|
|
a b c a b c
|
|
8 33 114 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a=8);
|
|
a b c a b c
|
|
8 33 114 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a=8);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a=8);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 8"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 8"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 8"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 8 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (t2.a=8);
|
|
a b c a b c
|
|
8 33 114 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and (t2.a=8);
|
|
a b c a b c
|
|
8 33 114 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (t2.a=8);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (t2.a=8);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 8"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 8"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 8"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 8 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# conjunctive subformulas : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.c>200);
|
|
a b c a b c
|
|
5 16 207 5 14 312
|
|
5 16 207 5 33 207
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.c>200);
|
|
a b c a b c
|
|
5 16 207 5 14 312
|
|
5 16 207 5 33 207
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.c>200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.c>200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# conjunctive subformulas : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>110);
|
|
a b c a b c
|
|
1 19 117 1 16 909
|
|
1 19 117 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>110);
|
|
a b c a b c
|
|
1 19 117 1 16 909
|
|
1 19 117 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>110);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>110);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 110",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and c > 110",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100 and c > 110",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# extracted or formula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
a b c a b c
|
|
5 16 207 5 14 312
|
|
5 16 207 5 33 207
|
|
8 33 114 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
a b c a b c
|
|
5 16 207 5 14 312
|
|
5 16 207 5 33 207
|
|
8 33 114 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b > 27 or v1.b < 19",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and (t1.b > 27 or t1.b < 19)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.b > 27 or t1.b < 19)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# extracted or formula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c>200) or (v1.c<105));
|
|
a b c a b c
|
|
1 21 101 1 16 909
|
|
5 16 207 5 14 312
|
|
5 16 207 5 33 207
|
|
1 21 101 1 19 132
|
|
select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c>200) or (v1.c<105));
|
|
a b c a b c
|
|
1 21 101 1 16 909
|
|
5 16 207 5 14 312
|
|
5 16 207 5 33 207
|
|
1 21 101 1 19 132
|
|
explain select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c>200) or (v1.c<105));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c>200) or (v1.c<105));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 200 or v1.c < 105",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and (c > 200 or c < 105)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100 and (c > 200 or c < 105)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# extracted or formula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
((v1.a>3) and (t2.c>110) and (v1.c=t2.c)) or
|
|
((v1.a=1) and (v1.c<110));
|
|
a b c a b c
|
|
1 21 101 2 3 207
|
|
1 21 101 1 16 909
|
|
1 21 101 5 14 312
|
|
1 21 101 5 33 207
|
|
1 21 101 6 20 211
|
|
1 21 101 1 19 132
|
|
1 21 101 8 33 117
|
|
1 21 101 3 21 231
|
|
1 21 101 6 23 303
|
|
5 16 207 2 3 207
|
|
5 16 207 5 33 207
|
|
5 27 132 1 19 132
|
|
select * from v1,t2 where
|
|
((v1.a>3) and (t2.c>110) and (v1.c=t2.c)) or
|
|
((v1.a=1) and (v1.c<110));
|
|
a b c a b c
|
|
1 21 101 2 3 207
|
|
1 21 101 1 16 909
|
|
1 21 101 5 14 312
|
|
1 21 101 5 33 207
|
|
1 21 101 6 20 211
|
|
1 21 101 1 19 132
|
|
1 21 101 8 33 117
|
|
1 21 101 3 21 231
|
|
1 21 101 6 23 303
|
|
5 16 207 2 3 207
|
|
5 16 207 5 33 207
|
|
5 27 132 1 19 132
|
|
explain select * from v1,t2 where
|
|
((v1.a>3) and (t2.c>110) and (v1.c=t2.c)) or
|
|
((v1.a=1) and (v1.c<110));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where
|
|
((v1.a>3) and (t2.c>110) and (v1.c=t2.c)) or
|
|
((v1.a=1) and (v1.c<110));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 3 or v1.a = 1 and v1.c < 110"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.c = t2.c and v1.a > 3 and t2.c > 110 or v1.a = 1 and v1.c < 110",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and (t1.a > 3 and c > 110 or t1.a = 1 and c < 110)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and (t1.a > 3 or t1.a = 1)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100 and (t1.a > 3 and c > 110 or t1.a = 1 and c < 110)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.a > 3 or t1.a = 1)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using intersect in view definition
|
|
# prepare of a query
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# conjunctive subformulas : pushing into HAVING
|
|
prepare stmt from "select * from v1,t2
|
|
where (v1.a=t2.a) and (v1.a<5) and (v1.c>110);";
|
|
execute stmt;
|
|
a b c a b c
|
|
1 19 117 1 16 909
|
|
1 19 117 1 19 132
|
|
execute stmt;
|
|
a b c a b c
|
|
1 19 117 1 16 909
|
|
1 19 117 1 19 132
|
|
deallocate prepare stmt;
|
|
# using intersect in derived table definition
|
|
# extracted or formula : pushing into WHERE using equalities
|
|
# extracted or formula : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select *
|
|
from t2,
|
|
(select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c < 300
|
|
intersect
|
|
select a, b, min(c) as c from t1
|
|
where t1.b>10 group by a,b having c > 100) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=909)) or
|
|
((d1.a<4) and (d1.c<200)));
|
|
a b c a b c
|
|
1 16 909 5 16 207
|
|
1 19 132 1 19 117
|
|
3 21 231 1 21 101
|
|
select *
|
|
from t2,
|
|
(select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c < 300
|
|
intersect
|
|
select a, b, min(c) as c from t1
|
|
where t1.b>10 group by a,b having c > 100) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=909)) or
|
|
((d1.a<4) and (d1.c<200)));
|
|
a b c a b c
|
|
1 16 909 5 16 207
|
|
1 19 132 1 19 117
|
|
3 21 231 1 21 101
|
|
explain select *
|
|
from t2,
|
|
(select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c < 300
|
|
intersect
|
|
select a, b, min(c) as c from t1
|
|
where t1.b>10 group by a,b having c > 100) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=909)) or
|
|
((d1.a<4) and (d1.c<200)));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select *
|
|
from t2,
|
|
(select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c < 300
|
|
intersect
|
|
select a, b, min(c) as c from t1
|
|
where t1.b>10 group by a,b having c > 100) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=909)) or
|
|
((d1.a<4) and (d1.c<200)));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c = 909 and t2.b > 13 or d1.a < 4 and d1.c < 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and (t1.b > 13 or t1.a < 4 and c < 200)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and (t1.b > 13 or t1.a < 4)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 100 and (t1.b > 13 or t1.a < 4 and c < 200)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.b > 13 or t1.a < 4)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300;
|
|
# using except in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
1 21 500 1 16 909
|
|
1 33 988 1 19 132
|
|
1 21 500 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
1 21 500 1 16 909
|
|
1 33 988 1 19 132
|
|
1 21 500 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a<5);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a=6);
|
|
a b c a b c
|
|
6 20 315 6 20 211
|
|
6 20 315 6 23 303
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a=6);
|
|
a b c a b c
|
|
6 20 315 6 20 211
|
|
6 20 315 6 23 303
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a=6);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a=6);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 6"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 6"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 6 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# conjunctive subformulas : pushing into WHERE using equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (t2.a=6);
|
|
a b c a b c
|
|
6 20 315 6 20 211
|
|
6 20 315 6 23 303
|
|
select * from v1,t2 where (v1.a=t2.a) and (t2.a=6);
|
|
a b c a b c
|
|
6 20 315 6 20 211
|
|
6 20 315 6 23 303
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (t2.a=6);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (t2.a=6);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a = 6"
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a = 6"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a = 6 and t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# conjunctive subformulas : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.c>500);
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
5 14 787 5 14 312
|
|
5 14 787 5 33 207
|
|
1 33 988 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.c>500);
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
5 14 787 5 14 312
|
|
5 14 787 5 33 207
|
|
1 33 988 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.c>500);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.c>500);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 500",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and c > 500",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300 and c > 500",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# conjunctive subformulas : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>500);
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
1 33 988 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>500);
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
1 33 988 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>500);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a<5) and (v1.c>500);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 500",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and c > 500",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300 and c > 500",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# extracted or formula : pushing into WHERE
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
5 14 787 5 14 312
|
|
5 14 787 5 33 207
|
|
1 33 988 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
5 14 787 5 14 312
|
|
5 14 787 5 33 207
|
|
1 33 988 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and ((v1.b>27) or (v1.b<19));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b > 27 or v1.b < 19",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and (t1.b > 27 or t1.b < 19)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.b > 27 or t1.b < 19)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# extracted or formula : pushing into HAVING
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c<400) or (v1.c>800));
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
6 20 315 6 20 211
|
|
1 33 988 1 19 132
|
|
6 20 315 6 23 303
|
|
select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c<400) or (v1.c>800));
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
6 20 315 6 20 211
|
|
1 33 988 1 19 132
|
|
6 20 315 6 23 303
|
|
explain select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c<400) or (v1.c>800));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where
|
|
(v1.a=t2.a) and ((v1.c<400) or (v1.c>800));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c < 400 or v1.c > 800",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and (c < 400 or c > 800)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300 and (c < 400 or c > 800)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# extracted or formula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING using equalities
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
|
|
(v1.c=t2.c) and
|
|
((v1.a>1) and (t2.c<500)) or
|
|
((v1.a=1) and (v1.c>500));
|
|
a b c a b c
|
|
1 33 988 2 3 207
|
|
1 33 988 1 16 909
|
|
1 33 988 5 14 312
|
|
1 33 988 5 33 207
|
|
1 33 988 6 20 211
|
|
1 33 988 1 19 132
|
|
1 33 988 8 33 117
|
|
1 33 988 3 21 231
|
|
1 33 988 6 23 303
|
|
select * from v1,t2 where
|
|
(v1.c=t2.c) and
|
|
((v1.a>1) and (t2.c<500)) or
|
|
((v1.a=1) and (v1.c>500));
|
|
a b c a b c
|
|
1 33 988 2 3 207
|
|
1 33 988 1 16 909
|
|
1 33 988 5 14 312
|
|
1 33 988 5 33 207
|
|
1 33 988 6 20 211
|
|
1 33 988 1 19 132
|
|
1 33 988 8 33 117
|
|
1 33 988 3 21 231
|
|
1 33 988 6 23 303
|
|
explain select * from v1,t2 where
|
|
(v1.c=t2.c) and
|
|
((v1.a>1) and (t2.c<500)) or
|
|
((v1.a=1) and (v1.c>500));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where
|
|
(v1.c=t2.c) and
|
|
((v1.a>1) and (t2.c<500)) or
|
|
((v1.a=1) and (v1.c>500));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a > 1 or v1.a = 1 and v1.c > 500"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"attached_condition": "v1.c = t2.c and v1.a > 1 and t2.c < 500 or v1.a = 1 and v1.c > 500",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and (t1.a > 1 and c < 500 or t1.a = 1 and c > 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and (t1.a > 1 or t1.a = 1)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300 and (t1.a > 1 and c < 500 or t1.a = 1 and c > 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.a > 1 or t1.a = 1)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
# using except in view definition
|
|
# prepare of a query
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# conjunctive subformulas : pushing into HAVING
|
|
prepare stmt from "select * from v1,t2
|
|
where (v1.a=t2.a) and (v1.a<5) and (v1.c>500);";
|
|
execute stmt;
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
1 33 988 1 19 132
|
|
execute stmt;
|
|
a b c a b c
|
|
1 33 988 1 16 909
|
|
1 33 988 1 19 132
|
|
deallocate prepare stmt;
|
|
# using except in view definition
|
|
# extracted or formula : pushing into WHERE using equalities
|
|
# extracted or formula : pushing into HAVING
|
|
# pushing equalities
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select *
|
|
from t2,
|
|
(select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=988)) or
|
|
((d1.a>4) and (d1.c>500)));
|
|
a b c a b c
|
|
5 14 312 5 14 787
|
|
select *
|
|
from t2,
|
|
(select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=988)) or
|
|
((d1.a>4) and (d1.c>500)));
|
|
a b c a b c
|
|
5 14 312 5 14 787
|
|
explain select *
|
|
from t2,
|
|
(select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=988)) or
|
|
((d1.a>4) and (d1.c>500)));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select *
|
|
from t2,
|
|
(select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300) as d1
|
|
where
|
|
(d1.b=t2.b) and
|
|
(((t2.b>13) and (t2.c=988)) or
|
|
((d1.a>4) and (d1.c>500)));
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c = 988 and t2.b > 13 or d1.a > 4 and d1.c > 500",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and (t1.b > 13 or t1.a > 4 and c > 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and (t1.b > 13 or t1.a > 4)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 300 and (t1.b > 13 or t1.a > 4 and c > 500)",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and (t1.b > 13 or t1.a > 4)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union and intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
union
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a>3 group by a,b having c < 530;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
a b c a b c
|
|
6 20 309 6 20 211
|
|
6 20 309 6 23 303
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
a b c a b c
|
|
6 20 309 6 20 211
|
|
6 20 309 6 23 303
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 3 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 UNION <derived4> ALL NULL NULL NULL NULL 18 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
5 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect4,5> ALL NULL NULL NULL NULL NULL
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "__5.a > 5 and __5.c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect4,5>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "c < 300 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c < 530 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 3 and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union and intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a>3 group by a,b having c < 500
|
|
union
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
8 33 123 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
8 33 123 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 3 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 UNION t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL UNIT RESULT <unit2,3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c < 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c < 500 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 3 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union and except in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
union
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a>3 group by a,b having c < 530;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
a b c a b c
|
|
6 20 309 6 20 211
|
|
6 20 309 6 23 303
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
a b c a b c
|
|
6 20 309 6 20 211
|
|
6 20 309 6 23 303
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 3 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 UNION t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL UNIT RESULT <unit2,3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>5) and (v1.c>200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 5 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 530 and c > 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 3 and t1.a > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union and except in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, min(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 200
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a>3 group by a,b having c < 500
|
|
union
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
8 33 123 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
8 33 123 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 3 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 UNION t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL UNIT RESULT <unit2,3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<200);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c < 200",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 200 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c < 500 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 3 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 300 and c < 200",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using except and intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<7 group by a,b having c < 500
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 150;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<150);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<150);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<150);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL UNIT RESULT <unit2,3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<150);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c < 150",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and c < 150",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c < 500 and c < 150",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c > 150 and c < 150",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using except and intersect in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 150
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<7 group by a,b having c < 500;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
a b c a b c
|
|
8 33 123 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
a b c a b c
|
|
8 33 123 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT <derived4> ALL NULL NULL NULL NULL 18 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
5 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect4,5> ALL NULL NULL NULL NULL NULL
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c < 130",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "__5.a > 4 and __5.c < 130",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect4,5>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "c > 150 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c < 500 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using except, intersect and union in view definition
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 150
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<7 group by a,b having c < 500
|
|
union
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<7 group by a,b having c < 120;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
a b c a b c
|
|
8 33 123 8 33 117
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
a b c a b c
|
|
8 33 123 8 33 117
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 3 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT <derived4> ALL NULL NULL NULL NULL 18 Using where
|
|
4 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
5 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect4,5> ALL NULL NULL NULL NULL NULL
|
|
6 UNION t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL UNIT RESULT <unit2,3,6> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.c<130);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c < 130",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit2,3,6>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 300 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived4>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "__6.a > 4 and __6.c < 130",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect4,5>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"having_condition": "c > 150 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c < 500 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 6,
|
|
"operation": "UNION",
|
|
"having_condition": "c < 120 and c < 130",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using intersect in view definition
|
|
# using embedded view
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 120;
|
|
create view v2 as
|
|
select a, b, max(c) as c from v1
|
|
where v1.a<7 group by a,b;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
explain select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.c < 150",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 150",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 7 and v1.a > 4",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 120",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1,v2;
|
|
# using except in view definition
|
|
# using embedded view
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c < 300
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a,b having c > 150;
|
|
create view v2 as
|
|
select a, b, max(c) as c from v1
|
|
where v1.a<7 group by a,b;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
a b c a b c
|
|
5 27 132 5 14 312
|
|
5 27 132 5 33 207
|
|
explain select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED <derived3> ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v2,t2 where (v2.a=t2.a) and (v2.a>4) and (v2.c<150);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v2.c < 150",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c < 150",
|
|
"filesort": {
|
|
"sort_key": "v1.a, v1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 7 and v1.a > 4",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"having_condition": "c < 300",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c > 150",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a < 7 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1,v2;
|
|
# using intersect in view definition
|
|
# conditions are pushed in different parts of selects
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a having c > 300
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.b<21 group by b having c > 200;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.b>12) and (v1.c<450);
|
|
a b c a b c
|
|
6 20 315 6 20 211
|
|
6 20 315 6 23 303
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.b>12) and (v1.c<450);
|
|
a b c a b c
|
|
6 20 315 6 20 211
|
|
6 20 315 6 23 303
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.b>12) and (v1.c<450);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>4) and (v1.b>12) and (v1.c<450);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 4 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b > 12 and v1.c < 450",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 300 and t1.b > 12 and c < 450",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c > 200 and t1.a > 4 and c < 450",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b < 21 and t1.b > 12"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using except in view definition
|
|
# conditions are pushed in different parts of selects
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>20 group by a having c > 300
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<7 group by b having c > 150;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a<2) and (v1.b<30) and (v1.c>450);
|
|
a b c a b c
|
|
1 21 988 1 16 909
|
|
1 21 988 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a<2) and (v1.b<30) and (v1.c>450);
|
|
a b c a b c
|
|
1 21 988 1 16 909
|
|
1 21 988 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a<2) and (v1.b<30) and (v1.c>450);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a<2) and (v1.b<30) and (v1.c>450);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a < 2 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b < 30 and v1.c > 450",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 300 and t1.b < 30 and c > 450",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 20 and t1.a < 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c > 150 and t1.a < 2 and c > 450",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 7 and t1.b < 30"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using except and union in view definition
|
|
# conditions are pushed in different parts of selects
|
|
# conjunctive subformulas : pushing into HAVING
|
|
# extracted or formula : pushing into WHERE
|
|
# extracted or formula : pushing into HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>20 group by a having c > 300
|
|
except
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<7 group by b having c > 150;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and ((v1.a<2) or (v1.a<5)) and (v1.c>450);
|
|
a b c a b c
|
|
1 21 988 1 16 909
|
|
1 21 988 1 19 132
|
|
select * from v1,t2 where (v1.a=t2.a) and ((v1.a<2) or (v1.a<5)) and (v1.c>450);
|
|
a b c a b c
|
|
1 21 988 1 16 909
|
|
1 21 988 1 19 132
|
|
explain select * from v1,t2 where (v1.a=t2.a) and ((v1.a<2) or (v1.a<5)) and (v1.c>450);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 2 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and ((v1.a<2) or (v1.a<5)) and (v1.c>450);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "(t2.a < 2 or t2.a < 5) and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.c > 450",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<except2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 300 and c > 450",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 20 and (t1.a < 2 or t1.a < 5)"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "EXCEPT",
|
|
"having_condition": "c > 150 and (t1.a < 2 or t1.a < 5) and c > 450",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 7"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union and intersect in view definition
|
|
# conditions are pushed in different parts of selects
|
|
# conjunctive subformulas : pushing into WHERE and HAVING
|
|
create view v1 as
|
|
select a, b, max(c) as c from t1
|
|
where t1.a<9 group by a having c > 100
|
|
intersect
|
|
select a, b, max(c) as c from t1
|
|
where t1.a>3 group by b having c < 800
|
|
union
|
|
select a, b, max(c) as c from t1
|
|
where t1.b>10 group by a,b having c > 300;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.a>1) and (v1.b > 12) and (v1.c>400);
|
|
a b c a b c
|
|
5 14 787 5 14 312
|
|
5 14 787 5 33 207
|
|
select * from v1,t2 where (v1.a=t2.a) and (v1.a>1) and (v1.b > 12) and (v1.c>400);
|
|
a b c a b c
|
|
5 14 787 5 14 312
|
|
5 14 787 5 33 207
|
|
explain select * from v1,t2 where (v1.a=t2.a) and (v1.a>1) and (v1.b > 12) and (v1.c>400);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.a 3 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
4 UNION t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
|
|
NULL UNIT RESULT <unit2,3,4> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.a>1) and (v1.b > 12) and (v1.c>400);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.a > 1 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.b > 12 and v1.c > 400",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "c > 100 and t1.b > 12 and c > 400",
|
|
"filesort": {
|
|
"sort_key": "t1.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 9 and t1.a > 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"having_condition": "c < 800 and t1.a > 1 and c > 400",
|
|
"filesort": {
|
|
"sort_key": "t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a > 3 and t1.b > 12"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "UNION",
|
|
"having_condition": "c > 300 and c > 400",
|
|
"filesort": {
|
|
"sort_key": "t1.a, t1.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 18,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.b > 10 and t1.a > 1 and t1.b > 12"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
create table t3 (a int, b int, c int);
|
|
insert into t3 values
|
|
(1,21,345), (2,33,7), (8,33,114), (3,21,500), (1,19,107), (5,14,787),
|
|
(4,33,123), (9,10,211), (11,16,207), (10,33,988), (5,27,132), (12,21,104),
|
|
(6,20,309), (16,20,315), (16,21,101), (18,33,404), (19,10,800), (10,21,123),
|
|
(17,11,708), (6,20,214);
|
|
create index i1 on t3(a);
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# pushed condition gives range access
|
|
create view v1 as
|
|
select a, b, max(c) as max_c from t3
|
|
where a>0 group by a;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.b=t2.b) and (v1.a<5);
|
|
a b max_c a b c
|
|
4 33 123 5 33 207
|
|
2 33 7 5 33 207
|
|
4 33 123 8 33 117
|
|
2 33 7 8 33 117
|
|
3 21 500 3 21 231
|
|
1 21 345 3 21 231
|
|
select * from v1,t2 where (v1.b=t2.b) and (v1.a<5);
|
|
a b max_c a b c
|
|
4 33 123 5 33 207
|
|
2 33 7 5 33 207
|
|
4 33 123 8 33 117
|
|
2 33 7 8 33 117
|
|
3 21 500 3 21 231
|
|
1 21 345 3 21 231
|
|
explain select * from v1,t2 where (v1.b=t2.b) and (v1.a<5);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
|
|
2 DERIVED t3 range i1 i1 5 NULL 5 Using index condition
|
|
explain format=json select * from v1,t2 where (v1.b=t2.b) and (v1.a<5);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 5",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["i1"],
|
|
"key": "i1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"index_condition": "t3.a > 0 and t3.a < 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# pushed condition gives range access
|
|
create view v1 as
|
|
select a, b, max(c) as c from t3
|
|
where t3.a>1 group by a
|
|
union
|
|
select a, b, max(c) as c from t3
|
|
where t3.a>2 group by a;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.b=t2.b) and (v1.a<4);
|
|
a b c a b c
|
|
2 33 7 5 33 207
|
|
2 33 7 8 33 117
|
|
3 21 500 3 21 231
|
|
select * from v1,t2 where (v1.b=t2.b) and (v1.a<4);
|
|
a b c a b c
|
|
2 33 7 5 33 207
|
|
2 33 7 8 33 117
|
|
3 21 500 3 21 231
|
|
explain select * from v1,t2 where (v1.b=t2.b) and (v1.a<4);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
|
|
2 DERIVED t3 range i1 i1 5 NULL 2 Using index condition
|
|
3 UNION t3 range i1 i1 5 NULL 1 Using index condition
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.b=t2.b) and (v1.a<4);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 4",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["i1"],
|
|
"key": "i1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"index_condition": "t3.a > 1 and t3.a < 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["i1"],
|
|
"key": "i1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"index_condition": "t3.a > 2 and t3.a < 4"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
# using union in view definition
|
|
# conjunctive subformulas : pushing into WHERE
|
|
# pushed condition gives range access in one of the selects
|
|
create view v1 as
|
|
select a, b, max(c) as c from t3
|
|
where t3.a>1 group by a
|
|
union
|
|
select a, b, max(c) as c from t3
|
|
where t3.b<21 group by b;
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.b=t2.b) and (v1.a<3);
|
|
a b c a b c
|
|
2 33 7 5 33 207
|
|
1 19 107 1 19 132
|
|
2 33 7 8 33 117
|
|
select * from v1,t2 where (v1.b=t2.b) and (v1.a<3);
|
|
a b c a b c
|
|
2 33 7 5 33 207
|
|
1 19 107 1 19 132
|
|
2 33 7 8 33 117
|
|
explain select * from v1,t2 where (v1.b=t2.b) and (v1.a<3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
|
|
2 DERIVED t3 range i1 i1 5 NULL 1 Using index condition
|
|
3 UNION t3 ALL NULL NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
|
|
explain format=json select * from v1,t2 where (v1.b=t2.b) and (v1.a<3);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.b is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"ref": ["test.t2.b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.a < 3",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["i1"],
|
|
"key": "i1",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"index_condition": "t3.a > 1 and t3.a < 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "t3.a < 3",
|
|
"filesort": {
|
|
"sort_key": "t3.b",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.b < 21"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop view v1;
|
|
alter table t3 drop index i1;
|
|
drop table t1,t2,t3;
|
|
#
|
|
# MDEV-10855: Pushdown into derived with window functions
|
|
#
|
|
set @save_optimizer_switch= @@optimizer_switch;
|
|
set optimizer_switch='split_materialized=off';
|
|
create table t1 (a int, c varchar(16));
|
|
insert into t1 values
|
|
(8,'aa'), (5,'cc'), (1,'bb'), (2,'aa'), (9,'cc'),
|
|
(7,'aa'), (2,'aa'), (7,'bb');
|
|
create table t2 (a int, b int, c varchar(16), index idx(a,c));
|
|
insert into t2 values
|
|
(7,10,'cc'), (1,20,'aa'), (2,23,'bb'), (7,18,'cc'), (1,30,'bb'),
|
|
(4,71,'xx'), (3,15,'aa'), (7,82,'bb'), (8,12,'dd'), (4,15,'aa'),
|
|
(11,33,'yy'), (10,42,'zz'), (4,53,'xx'), (10,17,'yy'), (7,12,'bb'),
|
|
(8,20,'dd'), (7,32,'bb'), (1,50,'aa'), (3,40,'bb'), (3,77,'aa');
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from (select a, c, sum(b) over (partition by a,c) from t2) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum(b) over (partition by a,c)
|
|
3 aa 92
|
|
3 aa 92
|
|
3 bb 40
|
|
4 aa 15
|
|
7 bb 126
|
|
7 bb 126
|
|
7 bb 126
|
|
7 cc 28
|
|
7 cc 28
|
|
select * from (select a, c, sum(b) over (partition by a,c) from t2) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum(b) over (partition by a,c)
|
|
3 aa 92
|
|
3 aa 92
|
|
3 bb 40
|
|
4 aa 15
|
|
7 bb 126
|
|
7 bb 126
|
|
7 bb 126
|
|
7 cc 28
|
|
7 cc 28
|
|
explain select * from (select a, c, sum(b) over (partition by a,c) from t2) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 16 Using where
|
|
2 DERIVED t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
explain format=json select * from (select a, c, sum(b) over (partition by a,c) from t2) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 16,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a > 2 and t.c in ('aa','bb','cc')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2 and t2.c in ('aa','bb','cc')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
n a c s
|
|
1 3 aa 92
|
|
1 3 aa 92
|
|
1 3 bb 40
|
|
1 4 aa 15
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 cc 28
|
|
1 7 cc 28
|
|
2 3 aa 132
|
|
2 3 aa 132
|
|
2 3 bb 132
|
|
2 4 aa 139
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 cc 154
|
|
2 7 cc 154
|
|
select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
n a c s
|
|
1 3 aa 92
|
|
1 3 aa 92
|
|
1 3 bb 40
|
|
1 4 aa 15
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 cc 28
|
|
1 7 cc 28
|
|
2 3 aa 132
|
|
2 3 aa 132
|
|
2 3 bb 132
|
|
2 4 aa 139
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 cc 154
|
|
2 7 cc 154
|
|
explain select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 32 Using where
|
|
2 DERIVED t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
3 UNION t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
explain format=json select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 32,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a > 2 and t.c in ('aa','bb','cc')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2 and t2.c in ('aa','bb','cc')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select *
|
|
from (select a, c, sum(b) over (partition by a,c) as s from t2) as t, t1
|
|
where t1.a=t.a and t1.c=t.c and t1.c in ('aa','bb','cc');
|
|
a c s a c
|
|
1 bb 30 1 bb
|
|
7 bb 126 7 bb
|
|
7 bb 126 7 bb
|
|
7 bb 126 7 bb
|
|
select *
|
|
from (select a, c, sum(b) over (partition by a,c) as s from t2) as t, t1
|
|
where t1.a=t.a and t1.c=t.c and t1.c in ('aa','bb','cc');
|
|
a c s a c
|
|
1 bb 30 1 bb
|
|
7 bb 126 7 bb
|
|
7 bb 126 7 bb
|
|
7 bb 126 7 bb
|
|
explain select *
|
|
from (select a, c, sum(b) over (partition by a,c) as s from t2) as t, t1
|
|
where t1.a=t.a and t1.c=t.c and t1.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 24 test.t1.a,test.t1.c 2
|
|
2 DERIVED t2 ALL NULL NULL NULL NULL 20 Using where; Using temporary
|
|
explain format=json select *
|
|
from (select a, c, sum(b) over (partition by a,c) as s from t2) as t, t1
|
|
where t1.a=t.a and t1.c=t.c and t1.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 8,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c in ('aa','bb','cc') and t1.a is not null and t1.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "24",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t1.a", "test.t1.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c in ('aa','bb','cc')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
union all
|
|
select 3 as n, a, c, sum(b) as s from t2 group by a
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
n a c s
|
|
1 3 aa 92
|
|
1 3 aa 92
|
|
1 3 bb 40
|
|
1 4 aa 15
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 cc 28
|
|
1 7 cc 28
|
|
2 3 aa 132
|
|
2 3 aa 132
|
|
2 3 bb 132
|
|
2 4 aa 139
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 cc 154
|
|
2 7 cc 154
|
|
3 3 aa 132
|
|
3 7 cc 154
|
|
select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
union all
|
|
select 3 as n, a, c, sum(b) as s from t2 group by a
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
n a c s
|
|
1 3 aa 92
|
|
1 3 aa 92
|
|
1 3 bb 40
|
|
1 4 aa 15
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 bb 126
|
|
1 7 cc 28
|
|
1 7 cc 28
|
|
2 3 aa 132
|
|
2 3 aa 132
|
|
2 3 bb 132
|
|
2 4 aa 139
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 bb 154
|
|
2 7 cc 154
|
|
2 7 cc 154
|
|
3 3 aa 132
|
|
3 7 cc 154
|
|
explain select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
union all
|
|
select 3 as n, a, c, sum(b) as s from t2 group by a
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 48 Using where
|
|
2 DERIVED t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
3 UNION t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
4 UNION t2 ALL idx NULL NULL NULL 20 Using where; Using temporary; Using filesort
|
|
explain format=json select * from
|
|
(
|
|
select 1 as n, a, c, sum(b) over (partition by a,c) as s from t2
|
|
union all
|
|
select 2 as n, a, c, sum(b) over (partition by a) as s from t2
|
|
union all
|
|
select 3 as n, a, c, sum(b) as s from t2 group by a
|
|
) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 48,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a > 2 and t.c in ('aa','bb','cc')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2 and t2.c in ('aa','bb','cc')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "UNION",
|
|
"having_condition": "t2.c in ('aa','bb','cc')",
|
|
"filesort": {
|
|
"sort_key": "t2.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a,c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum_b avg_b
|
|
3 aa 92 46.0000
|
|
3 aa 92 46.0000
|
|
3 bb 40 40.0000
|
|
4 aa 15 15.0000
|
|
7 bb 126 42.0000
|
|
7 bb 126 42.0000
|
|
7 bb 126 42.0000
|
|
7 cc 28 14.0000
|
|
7 cc 28 14.0000
|
|
select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a,c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum_b avg_b
|
|
3 aa 92 46.0000
|
|
3 aa 92 46.0000
|
|
3 bb 40 40.0000
|
|
4 aa 15 15.0000
|
|
7 bb 126 42.0000
|
|
7 bb 126 42.0000
|
|
7 bb 126 42.0000
|
|
7 cc 28 14.0000
|
|
7 cc 28 14.0000
|
|
explain select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a,c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 16 Using where
|
|
2 DERIVED t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
explain format=json select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a,c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 16,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a > 2 and t.c in ('aa','bb','cc')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2 and t2.c in ('aa','bb','cc')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum_b avg_b
|
|
3 aa 92 44.0000
|
|
3 aa 92 44.0000
|
|
3 bb 40 44.0000
|
|
4 aa 15 46.3333
|
|
7 bb 126 30.8000
|
|
7 bb 126 30.8000
|
|
7 bb 126 30.8000
|
|
7 cc 28 30.8000
|
|
7 cc 28 30.8000
|
|
select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum_b avg_b
|
|
3 aa 92 44.0000
|
|
3 aa 92 44.0000
|
|
3 bb 40 44.0000
|
|
4 aa 15 46.3333
|
|
7 bb 126 30.8000
|
|
7 bb 126 30.8000
|
|
7 bb 126 30.8000
|
|
7 cc 28 30.8000
|
|
7 cc 28 30.8000
|
|
explain select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 16 Using where
|
|
2 DERIVED t2 ALL idx NULL NULL NULL 20 Using where; Using temporary
|
|
explain format=json select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by a) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 16,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a > 2 and t.c in ('aa','bb','cc')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 20,
|
|
"filtered": 80,
|
|
"attached_condition": "t2.a > 2"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum_b avg_b
|
|
3 aa 92 35.4000
|
|
3 aa 92 35.4000
|
|
3 bb 40 36.5000
|
|
4 aa 15 35.4000
|
|
7 bb 126 36.5000
|
|
7 bb 126 36.5000
|
|
7 bb 126 36.5000
|
|
7 cc 28 14.0000
|
|
7 cc 28 14.0000
|
|
select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
a c sum_b avg_b
|
|
3 aa 92 35.4000
|
|
3 aa 92 35.4000
|
|
3 bb 40 36.5000
|
|
4 aa 15 35.4000
|
|
7 bb 126 36.5000
|
|
7 bb 126 36.5000
|
|
7 bb 126 36.5000
|
|
7 cc 28 14.0000
|
|
7 cc 28 14.0000
|
|
explain select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 Using where
|
|
2 DERIVED t2 ALL NULL NULL NULL NULL 20 Using where; Using temporary
|
|
explain format=json select * from (select a, c,
|
|
sum(b) over (partition by a,c) as sum_b,
|
|
avg(b) over (partition by c) as avg_b
|
|
from t2 ) as t
|
|
where t.a > 2 and t.c in ('aa','bb','cc');
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t.a > 2 and t.c in ('aa','bb','cc')",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.a, t2.c"
|
|
}
|
|
},
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t2.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 20,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c in ('aa','bb','cc')"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop table t1,t2;
|
|
set optimizer_switch= @save_optimizer_switch;
|
|
#
|
|
# MDEV-13369: Optimization for equi-joins of grouping derived tables
|
|
# (Splitting derived tables / views with GROUP BY)
|
|
# MDEV-13389: Optimization for equi-joins of derived tables with WF
|
|
# (Splitting derived tables / views with window functions)
|
|
#
|
|
create table t1 (a int, b int, index idx_b(b)) engine=myisam;
|
|
insert into t1 values
|
|
(8,3), (5,7), (1,2), (2,1), (9,7), (7,5), (2,2), (7,3),
|
|
(9,3), (8,1), (4,5), (2,3);
|
|
create table t2 (a int, b int, c char(127), index idx_a(a)) engine=myisam;
|
|
insert into t2 values
|
|
(7,10,'x'), (1,20,'a'), (2,23,'b'), (7,18,'z'), (1,30,'c'),
|
|
(4,71,'d'), (3,15,'x'), (7,82,'y'), (8,12,'t'), (4,15,'b'),
|
|
(11,33,'a'), (10,42,'u'), (4,53,'p'), (10,17,'r'), (2,90,'x'),
|
|
(17,10,'s'), (11,20,'v'), (12,23,'y'), (17,18,'a'), (11,30,'d'),
|
|
(24,71,'h'), (23,15,'i'), (27,82,'k'), (28,12,'p'), (24,15,'q'),
|
|
(31,33,'f'), (30,42,'h'), (40,53,'m'), (30,17,'o'), (21,90,'b'),
|
|
(37,10,'e'), (31,20,'g'), (32,23,'f'), (37,18,'n'), (41,30,'l'),
|
|
(54,71,'j'), (53,15,'w'), (57,82,'z'), (58,12,'k'), (54,15,'p'),
|
|
(61,33,'c'), (60,42,'a'), (62,53,'x'), (67,17,'g'), (64,90,'v');
|
|
insert into t2 select a+10, b+10, concat(c,'f') from t2;
|
|
analyze table t1,t2;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
set statement optimizer_switch='split_materialized=off' for select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.c) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b < 3;
|
|
a s m
|
|
2 113 b
|
|
8 12 t
|
|
1 50 a
|
|
2 113 b
|
|
select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.c) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b < 3;
|
|
a s m
|
|
2 113 b
|
|
8 12 t
|
|
1 50 a
|
|
2 113 b
|
|
explain extended select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.c) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b < 3;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 range idx_b idx_b 5 NULL 4 100.00 Using index condition; Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 2 100.00
|
|
2 LATERAL DERIVED t2 ref idx_a idx_a 5 test.t1.a 1 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`t`.`s` AS `s`,`t`.`m` AS `m` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,sum(`test`.`t2`.`b`) AS `s`,min(`test`.`t2`.`c`) AS `m` from `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` group by `test`.`t2`.`a`) `t` where `t`.`a` = `test`.`t1`.`a` and `test`.`t1`.`b` < 3
|
|
explain format=json select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.c) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b < 3;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "range",
|
|
"possible_keys": ["idx_b"],
|
|
"key": "idx_b",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"index_condition": "t1.b < 3",
|
|
"attached_condition": "t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t1.a is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_a"],
|
|
"key": "idx_a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
prepare stmt from "select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.c) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b < 3";
|
|
execute stmt;
|
|
a s m
|
|
2 113 b
|
|
8 12 t
|
|
1 50 a
|
|
2 113 b
|
|
execute stmt;
|
|
a s m
|
|
2 113 b
|
|
8 12 t
|
|
1 50 a
|
|
2 113 b
|
|
deallocate prepare stmt;
|
|
set statement optimizer_switch='split_materialized=off' for select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.b) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b <= 5;
|
|
a s m
|
|
8 12 12
|
|
1 50 20
|
|
2 113 23
|
|
7 110 10
|
|
2 113 23
|
|
7 110 10
|
|
8 12 12
|
|
4 139 15
|
|
2 113 23
|
|
select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.b) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b <= 5;
|
|
a s m
|
|
8 12 12
|
|
1 50 20
|
|
2 113 23
|
|
7 110 10
|
|
2 113 23
|
|
7 110 10
|
|
8 12 12
|
|
4 139 15
|
|
2 113 23
|
|
explain extended select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.b) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b <= 5;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL idx_b NULL NULL NULL 12 83.33 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 2 100.00
|
|
2 LATERAL DERIVED t2 ref idx_a idx_a 5 test.t1.a 1 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`t`.`s` AS `s`,`t`.`m` AS `m` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,sum(`test`.`t2`.`b`) AS `s`,min(`test`.`t2`.`b`) AS `m` from `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` group by `test`.`t2`.`a`) `t` where `t`.`a` = `test`.`t1`.`a` and `test`.`t1`.`b` <= 5
|
|
explain format=json select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.b) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b <= 5;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx_b"],
|
|
"rows": 12,
|
|
"filtered": 83.33333588,
|
|
"attached_condition": "t1.b <= 5 and t1.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t1.a is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_a"],
|
|
"key": "idx_a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
prepare stmt from "select t1.a,t.s,t.m
|
|
from t1 join
|
|
(select a, sum(t2.b) as s, min(t2.b) as m from t2 group by t2.a) t
|
|
on t1.a=t.a
|
|
where t1.b <= 5";
|
|
execute stmt;
|
|
a s m
|
|
8 12 12
|
|
1 50 20
|
|
2 113 23
|
|
7 110 10
|
|
2 113 23
|
|
7 110 10
|
|
8 12 12
|
|
4 139 15
|
|
2 113 23
|
|
execute stmt;
|
|
a s m
|
|
8 12 12
|
|
1 50 20
|
|
2 113 23
|
|
7 110 10
|
|
2 113 23
|
|
7 110 10
|
|
8 12 12
|
|
4 139 15
|
|
2 113 23
|
|
deallocate prepare stmt;
|
|
delete from t1 where t1.b between 2 and 5;
|
|
set statement optimizer_switch='split_materialized=off' for select t1.a,t.max,t.min
|
|
from t1 left join
|
|
(select a, max(t2.b) max, min(t2.b) min from t2 group by t2.a) t
|
|
on t1.a=t.a;
|
|
a max min
|
|
5 NULL NULL
|
|
2 90 23
|
|
9 NULL NULL
|
|
8 12 12
|
|
select t1.a,t.max,t.min
|
|
from t1 left join
|
|
(select a, max(t2.b) max, min(t2.b) min from t2 group by t2.a) t
|
|
on t1.a=t.a;
|
|
a max min
|
|
5 NULL NULL
|
|
2 90 23
|
|
9 NULL NULL
|
|
8 12 12
|
|
explain extended select t1.a,t.max,t.min
|
|
from t1 left join
|
|
(select a, max(t2.b) max, min(t2.b) min from t2 group by t2.a) t
|
|
on t1.a=t.a;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 12 100.00
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 9 100.00 Using where
|
|
2 DERIVED t2 ALL idx_a NULL NULL NULL 90 100.00 Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t1` left join (/* select#2 */ select `test`.`t2`.`a` AS `a`,max(`test`.`t2`.`b`) AS `max`,min(`test`.`t2`.`b`) AS `min` from `test`.`t2` group by `test`.`t2`.`a`) `t` on(`t`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` is not null) where 1
|
|
explain format=json select t1.a,t.max,t.min
|
|
from t1 left join
|
|
(select a, max(t2.b) max, min(t2.b) min from t2 group by t2.a) t
|
|
on t1.a=t.a;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"const_condition": "1",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 12,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 9,
|
|
"filtered": 100,
|
|
"attached_condition": "trigcond(trigcond(t1.a is not null))",
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t2.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx_a"],
|
|
"rows": 90,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
create table t3 (a int, b int, c char(127), index idx_b(b)) engine=myisam;
|
|
insert into t3 values
|
|
(8,11,'aa'), (5,15,'cc'), (1,14,'bb'), (2,12,'aa'), (7,17,'cc'),
|
|
(7,18,'aa'), (2,11,'aa'), (7,10,'bb'), (3,11,'dd'), (4,12,'ee'),
|
|
(5,14,'dd'), (9,12,'ee');
|
|
create table t4 (a int, b int, c char(127), index idx(a,c)) engine=myisam;
|
|
insert into t4 values
|
|
(7,10,'cc'), (1,20,'aa'), (2,23,'bb'), (7,18,'cc'), (1,30,'bb'),
|
|
(4,71,'xx'), (3,15,'aa'), (7,82,'aa'), (8,12,'dd'), (4,15,'aa'),
|
|
(11,33,'yy'), (10,42,'zz'), (4,53,'xx'), (10,17,'yy'), (7,12,'cc'),
|
|
(8,20,'dd'), (7,32,'bb'), (1,50,'aa'), (3,40,'bb'), (3,77,'aa');
|
|
insert into t4 select a+10, b+10, concat(c,'f') from t4;
|
|
analyze table t3,t4;
|
|
Table Op Msg_type Msg_text
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
test.t4 analyze status Engine-independent statistics collected
|
|
test.t4 analyze status OK
|
|
set statement optimizer_switch='split_materialized=off' for select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
a c max min
|
|
7 cc 18 10
|
|
7 aa 82 82
|
|
select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
a c max min
|
|
7 cc 18 10
|
|
7 aa 82 82
|
|
explain extended select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 range idx_b idx_b 5 NULL 2 100.00 Using index condition; Using where
|
|
1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 2 100.00
|
|
2 LATERAL DERIVED t4 ref idx idx 133 test.t3.a,test.t3.c 1 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t3` join (/* select#2 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`c` AS `c`,max(`test`.`t4`.`b`) AS `max`,min(`test`.`t4`.`b`) AS `min` from `test`.`t4` where `test`.`t4`.`a` = `test`.`t3`.`a` and `test`.`t4`.`c` = `test`.`t3`.`c` group by `test`.`t4`.`a`,`test`.`t4`.`c`) `t` where `t`.`a` = `test`.`t3`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t3`.`b` > 15
|
|
explain format=json select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["idx_b"],
|
|
"key": "idx_b",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"index_condition": "t3.b > 15",
|
|
"attached_condition": "t3.a is not null and t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "133",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t3.a", "test.t3.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t3.a is not null and t3.c is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx"],
|
|
"key": "idx",
|
|
"key_length": "133",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t3.a", "test.t3.c"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='split_materialized=off' for select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
a c max min
|
|
1 bb 30 30
|
|
7 bb 32 32
|
|
select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
a c max min
|
|
1 bb 30 30
|
|
7 bb 32 32
|
|
explain extended select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 ALL idx_b NULL NULL NULL 12 83.33 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 4 100.00
|
|
2 DERIVED t4 ALL idx NULL NULL NULL 40 100.00 Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t3` join (/* select#2 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`c` AS `c`,max(`test`.`t4`.`b`) AS `max`,min(`test`.`t4`.`b`) AS `min` from `test`.`t4` group by `test`.`t4`.`a`,`test`.`t4`.`c`) `t` where `t`.`a` = `test`.`t3`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t3`.`b` <= 15
|
|
explain format=json select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx_b"],
|
|
"rows": 12,
|
|
"filtered": 83.33333588,
|
|
"attached_condition": "t3.b <= 15 and t3.a is not null and t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "133",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t3.a", "test.t3.c"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t4.a, t4.c",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 40,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='split_materialized=off' for select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
a c max min
|
|
7 cc 18 10
|
|
7 aa 82 82
|
|
select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
a c max min
|
|
7 cc 18 10
|
|
7 aa 82 82
|
|
explain extended select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 range idx_b idx_b 5 NULL 2 100.00 Using index condition; Using where
|
|
1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 2 100.00
|
|
2 LATERAL DERIVED t4 ref idx idx 133 test.t3.a,test.t3.c 1 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t3` join (/* select#2 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`c` AS `c`,max(`test`.`t4`.`b`) AS `max`,min(`test`.`t4`.`b`) AS `min` from `test`.`t4` where `test`.`t4`.`a` = `test`.`t3`.`a` and `test`.`t4`.`c` = `test`.`t3`.`c` group by `test`.`t4`.`c`,`test`.`t4`.`a`) `t` where `t`.`a` = `test`.`t3`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t3`.`b` > 15
|
|
explain format=json select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b > 15;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["idx_b"],
|
|
"key": "idx_b",
|
|
"key_length": "5",
|
|
"used_key_parts": ["b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"index_condition": "t3.b > 15",
|
|
"attached_condition": "t3.a is not null and t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "133",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t3.a", "test.t3.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t3.a is not null and t3.c is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx"],
|
|
"key": "idx",
|
|
"key_length": "133",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t3.a", "test.t3.c"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='split_materialized=off' for select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
a c max min
|
|
1 bb 30 30
|
|
7 bb 32 32
|
|
select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
a c max min
|
|
1 bb 30 30
|
|
7 bb 32 32
|
|
explain extended select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 ALL idx_b NULL NULL NULL 12 83.33 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 4 100.00
|
|
2 DERIVED t4 ALL idx NULL NULL NULL 40 100.00 Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t3` join (/* select#2 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`c` AS `c`,max(`test`.`t4`.`b`) AS `max`,min(`test`.`t4`.`b`) AS `min` from `test`.`t4` group by `test`.`t4`.`c`,`test`.`t4`.`a`) `t` where `t`.`a` = `test`.`t3`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t3`.`b` <= 15
|
|
explain format=json select t3.a,t3.c,t.max,t.min
|
|
from t3 join
|
|
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
|
|
on t3.a=t.a and t3.c=t.c
|
|
where t3.b <= 15;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx_b"],
|
|
"rows": 12,
|
|
"filtered": 83.33333588,
|
|
"attached_condition": "t3.b <= 15 and t3.a is not null and t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "133",
|
|
"used_key_parts": ["a", "c"],
|
|
"ref": ["test.t3.a", "test.t3.c"],
|
|
"rows": 4,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t4.c, t4.a",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx"],
|
|
"rows": 40,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop index idx_a on t2;
|
|
create index idx on t2(c,b);
|
|
create index idx_a on t3(a);
|
|
create index idx_c on t4(c);
|
|
insert into t3 select a+10, b+10, concat(c,'f') from t3;
|
|
insert into t3 select a+100, b+100, concat(c,'g') from t3;
|
|
insert into t4 select a+100, b+100, concat(c,'g') from t4;
|
|
insert into t4 select a+1000, b+1000, concat(c,'h') from t4;
|
|
analyze table t2,t3,t4;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
test.t4 analyze status Engine-independent statistics collected
|
|
test.t4 analyze status OK
|
|
set statement optimizer_switch='split_materialized=off' for select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
a b c t_c max min
|
|
7 82 y aa 82 15
|
|
7 82 y bb 40 23
|
|
7 82 y cc 18 10
|
|
select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
a b c t_c max min
|
|
7 82 y aa 82 15
|
|
7 82 y bb 40 23
|
|
7 82 y cc 18 10
|
|
explain extended select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 range idx idx 133 NULL 2 100.00 Using index condition; Using where
|
|
1 PRIMARY t3 ref idx_a idx_a 5 test.t2.a 1 100.00 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 128 test.t3.c 2 100.00
|
|
2 LATERAL DERIVED t4 ref idx_c idx_c 128 test.t3.c 2 100.00
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`t`.`c` AS `t_c`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t2` join `test`.`t3` join (/* select#2 */ select `test`.`t4`.`c` AS `c`,max(`test`.`t4`.`b`) AS `max`,min(`test`.`t4`.`b`) AS `min` from `test`.`t4` where `test`.`t4`.`c` = `test`.`t3`.`c` group by `test`.`t4`.`c`) `t` where `test`.`t3`.`a` = `test`.`t2`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t2`.`b` between 80 and 85 and `test`.`t2`.`c` in ('y','z')
|
|
explain format=json select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "range",
|
|
"possible_keys": ["idx"],
|
|
"key": "idx",
|
|
"key_length": "133",
|
|
"used_key_parts": ["c", "b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"index_condition": "t2.b between 80 and 85 and t2.c in ('y','z')",
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_a"],
|
|
"key": "idx_a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t3.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t3.c is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_c"],
|
|
"key": "idx_c",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t3.c"],
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='split_materialized=off' for select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
a b c t_c max min
|
|
7 10 x cc 18 10
|
|
7 10 x aa 82 15
|
|
7 10 x bb 40 23
|
|
1 20 a bb 40 23
|
|
2 23 b aa 82 15
|
|
2 23 b aa 82 15
|
|
7 18 z cc 18 10
|
|
7 18 z aa 82 15
|
|
7 18 z bb 40 23
|
|
1 30 c bb 40 23
|
|
3 15 x dd 20 12
|
|
8 12 t aa 82 15
|
|
11 33 a bbf 50 33
|
|
17 10 s ccf 28 20
|
|
17 10 s aaf 92 25
|
|
17 10 s bbf 50 33
|
|
11 20 v bbf 50 33
|
|
12 23 y aaf 92 25
|
|
12 23 y aaf 92 25
|
|
17 18 a ccf 28 20
|
|
17 18 a aaf 92 25
|
|
17 18 a bbf 50 33
|
|
11 30 d bbf 50 33
|
|
17 20 xf ccf 28 20
|
|
17 20 xf aaf 92 25
|
|
17 20 xf bbf 50 33
|
|
11 30 af bbf 50 33
|
|
12 33 bf aaf 92 25
|
|
12 33 bf aaf 92 25
|
|
17 28 zf ccf 28 20
|
|
17 28 zf aaf 92 25
|
|
17 28 zf bbf 50 33
|
|
13 25 xf ddf 30 22
|
|
18 22 tf aaf 92 25
|
|
select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
a b c t_c max min
|
|
7 10 x cc 18 10
|
|
7 10 x aa 82 15
|
|
7 10 x bb 40 23
|
|
1 20 a bb 40 23
|
|
2 23 b aa 82 15
|
|
2 23 b aa 82 15
|
|
7 18 z cc 18 10
|
|
7 18 z aa 82 15
|
|
7 18 z bb 40 23
|
|
1 30 c bb 40 23
|
|
3 15 x dd 20 12
|
|
8 12 t aa 82 15
|
|
11 33 a bbf 50 33
|
|
17 10 s ccf 28 20
|
|
17 10 s aaf 92 25
|
|
17 10 s bbf 50 33
|
|
11 20 v bbf 50 33
|
|
12 23 y aaf 92 25
|
|
12 23 y aaf 92 25
|
|
17 18 a ccf 28 20
|
|
17 18 a aaf 92 25
|
|
17 18 a bbf 50 33
|
|
11 30 d bbf 50 33
|
|
17 20 xf ccf 28 20
|
|
17 20 xf aaf 92 25
|
|
17 20 xf bbf 50 33
|
|
11 30 af bbf 50 33
|
|
12 33 bf aaf 92 25
|
|
12 33 bf aaf 92 25
|
|
17 28 zf ccf 28 20
|
|
17 28 zf aaf 92 25
|
|
17 28 zf bbf 50 33
|
|
13 25 xf ddf 30 22
|
|
18 22 tf aaf 92 25
|
|
explain extended select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 90 60.00 Using where
|
|
1 PRIMARY t3 ref idx_a idx_a 5 test.t2.a 1 100.00 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 128 test.t3.c 10 100.00
|
|
2 DERIVED t4 ALL idx_c NULL NULL NULL 160 100.00 Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`t`.`c` AS `t_c`,`t`.`max` AS `max`,`t`.`min` AS `min` from `test`.`t2` join `test`.`t3` join (/* select#2 */ select `test`.`t4`.`c` AS `c`,max(`test`.`t4`.`b`) AS `max`,min(`test`.`t4`.`b`) AS `min` from `test`.`t4` group by `test`.`t4`.`c`) `t` where `test`.`t3`.`a` = `test`.`t2`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t2`.`b` < 40
|
|
explain format=json select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
|
|
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 90,
|
|
"filtered": 60,
|
|
"attached_condition": "t2.b < 40 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_a"],
|
|
"key": "idx_a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t3.c"],
|
|
"rows": 10,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t4.c",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx_c"],
|
|
"rows": 160,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='split_materialized=off' for select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
a b c a b c c b sum(b) over (partition by c)
|
|
7 82 y 7 10 bb bb 23 125
|
|
7 82 y 7 10 bb bb 30 125
|
|
7 82 y 7 10 bb bb 32 125
|
|
7 82 y 7 10 bb bb 40 125
|
|
7 82 y 7 17 cc cc 10 40
|
|
7 82 y 7 17 cc cc 12 40
|
|
7 82 y 7 17 cc cc 18 40
|
|
7 82 y 7 18 aa aa 15 259
|
|
7 82 y 7 18 aa aa 15 259
|
|
7 82 y 7 18 aa aa 20 259
|
|
7 82 y 7 18 aa aa 50 259
|
|
7 82 y 7 18 aa aa 77 259
|
|
7 82 y 7 18 aa aa 82 259
|
|
select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
a b c a b c c b sum(b) over (partition by c)
|
|
7 82 y 7 10 bb bb 23 125
|
|
7 82 y 7 10 bb bb 30 125
|
|
7 82 y 7 10 bb bb 32 125
|
|
7 82 y 7 10 bb bb 40 125
|
|
7 82 y 7 17 cc cc 10 40
|
|
7 82 y 7 17 cc cc 12 40
|
|
7 82 y 7 17 cc cc 18 40
|
|
7 82 y 7 18 aa aa 15 259
|
|
7 82 y 7 18 aa aa 15 259
|
|
7 82 y 7 18 aa aa 20 259
|
|
7 82 y 7 18 aa aa 50 259
|
|
7 82 y 7 18 aa aa 77 259
|
|
7 82 y 7 18 aa aa 82 259
|
|
explain extended select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 range idx idx 133 NULL 2 100.00 Using index condition; Using where
|
|
1 PRIMARY t3 ref idx_a idx_a 5 test.t2.a 1 100.00 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 128 test.t3.c 2 100.00
|
|
2 LATERAL DERIVED t4 ref idx_c idx_c 128 test.t3.c 2 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`c` AS `c`,`t`.`c` AS `c`,`t`.`b` AS `b`,`t`.`sum(b) over (partition by c)` AS `sum(b) over (partition by c)` from `test`.`t2` join `test`.`t3` join (/* select#2 */ select `test`.`t4`.`c` AS `c`,`test`.`t4`.`b` AS `b`,sum(`test`.`t4`.`b`) over ( partition by `test`.`t4`.`c`) AS `sum(b) over (partition by c)` from `test`.`t4` where `test`.`t4`.`c` = `test`.`t3`.`c`) `t` where `test`.`t3`.`a` = `test`.`t2`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t2`.`b` between 80 and 85 and `test`.`t2`.`c` in ('y','z')
|
|
explain format=json select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "range",
|
|
"possible_keys": ["idx"],
|
|
"key": "idx",
|
|
"key_length": "133",
|
|
"used_key_parts": ["c", "b"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"index_condition": "t2.b between 80 and 85 and t2.c in ('y','z')",
|
|
"attached_condition": "t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_a"],
|
|
"key": "idx_a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t3.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t3.c is not null",
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t4.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_c"],
|
|
"key": "idx_c",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t3.c"],
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set statement optimizer_switch='split_materialized=off' for select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
a b c a b c c b sum(b) over (partition by c)
|
|
1 20 a 1 14 bb bb 23 125
|
|
1 20 a 1 14 bb bb 30 125
|
|
1 20 a 1 14 bb bb 32 125
|
|
1 20 a 1 14 bb bb 40 125
|
|
1 30 c 1 14 bb bb 23 125
|
|
1 30 c 1 14 bb bb 30 125
|
|
1 30 c 1 14 bb bb 32 125
|
|
1 30 c 1 14 bb bb 40 125
|
|
11 20 v 11 24 bbf bbf 33 165
|
|
11 20 v 11 24 bbf bbf 40 165
|
|
11 20 v 11 24 bbf bbf 42 165
|
|
11 20 v 11 24 bbf bbf 50 165
|
|
11 30 af 11 24 bbf bbf 33 165
|
|
11 30 af 11 24 bbf bbf 40 165
|
|
11 30 af 11 24 bbf bbf 42 165
|
|
11 30 af 11 24 bbf bbf 50 165
|
|
11 30 d 11 24 bbf bbf 33 165
|
|
11 30 d 11 24 bbf bbf 40 165
|
|
11 30 d 11 24 bbf bbf 42 165
|
|
11 30 d 11 24 bbf bbf 50 165
|
|
11 33 a 11 24 bbf bbf 33 165
|
|
11 33 a 11 24 bbf bbf 40 165
|
|
11 33 a 11 24 bbf bbf 42 165
|
|
11 33 a 11 24 bbf bbf 50 165
|
|
12 23 y 12 21 aaf aaf 25 319
|
|
12 23 y 12 21 aaf aaf 25 319
|
|
12 23 y 12 21 aaf aaf 30 319
|
|
12 23 y 12 21 aaf aaf 60 319
|
|
12 23 y 12 21 aaf aaf 87 319
|
|
12 23 y 12 21 aaf aaf 92 319
|
|
12 23 y 12 22 aaf aaf 25 319
|
|
12 23 y 12 22 aaf aaf 25 319
|
|
12 23 y 12 22 aaf aaf 30 319
|
|
12 23 y 12 22 aaf aaf 60 319
|
|
12 23 y 12 22 aaf aaf 87 319
|
|
12 23 y 12 22 aaf aaf 92 319
|
|
12 33 bf 12 21 aaf aaf 25 319
|
|
12 33 bf 12 21 aaf aaf 25 319
|
|
12 33 bf 12 21 aaf aaf 30 319
|
|
12 33 bf 12 21 aaf aaf 60 319
|
|
12 33 bf 12 21 aaf aaf 87 319
|
|
12 33 bf 12 21 aaf aaf 92 319
|
|
12 33 bf 12 22 aaf aaf 25 319
|
|
12 33 bf 12 22 aaf aaf 25 319
|
|
12 33 bf 12 22 aaf aaf 30 319
|
|
12 33 bf 12 22 aaf aaf 60 319
|
|
12 33 bf 12 22 aaf aaf 87 319
|
|
12 33 bf 12 22 aaf aaf 92 319
|
|
13 25 xf 13 21 ddf ddf 22 52
|
|
13 25 xf 13 21 ddf ddf 30 52
|
|
17 10 s 17 20 bbf bbf 33 165
|
|
17 10 s 17 20 bbf bbf 40 165
|
|
17 10 s 17 20 bbf bbf 42 165
|
|
17 10 s 17 20 bbf bbf 50 165
|
|
17 10 s 17 27 ccf ccf 20 70
|
|
17 10 s 17 27 ccf ccf 22 70
|
|
17 10 s 17 27 ccf ccf 28 70
|
|
17 10 s 17 28 aaf aaf 25 319
|
|
17 10 s 17 28 aaf aaf 25 319
|
|
17 10 s 17 28 aaf aaf 30 319
|
|
17 10 s 17 28 aaf aaf 60 319
|
|
17 10 s 17 28 aaf aaf 87 319
|
|
17 10 s 17 28 aaf aaf 92 319
|
|
17 18 a 17 20 bbf bbf 33 165
|
|
17 18 a 17 20 bbf bbf 40 165
|
|
17 18 a 17 20 bbf bbf 42 165
|
|
17 18 a 17 20 bbf bbf 50 165
|
|
17 18 a 17 27 ccf ccf 20 70
|
|
17 18 a 17 27 ccf ccf 22 70
|
|
17 18 a 17 27 ccf ccf 28 70
|
|
17 18 a 17 28 aaf aaf 25 319
|
|
17 18 a 17 28 aaf aaf 25 319
|
|
17 18 a 17 28 aaf aaf 30 319
|
|
17 18 a 17 28 aaf aaf 60 319
|
|
17 18 a 17 28 aaf aaf 87 319
|
|
17 18 a 17 28 aaf aaf 92 319
|
|
17 20 xf 17 20 bbf bbf 33 165
|
|
17 20 xf 17 20 bbf bbf 40 165
|
|
17 20 xf 17 20 bbf bbf 42 165
|
|
17 20 xf 17 20 bbf bbf 50 165
|
|
17 20 xf 17 27 ccf ccf 20 70
|
|
17 20 xf 17 27 ccf ccf 22 70
|
|
17 20 xf 17 27 ccf ccf 28 70
|
|
17 20 xf 17 28 aaf aaf 25 319
|
|
17 20 xf 17 28 aaf aaf 25 319
|
|
17 20 xf 17 28 aaf aaf 30 319
|
|
17 20 xf 17 28 aaf aaf 60 319
|
|
17 20 xf 17 28 aaf aaf 87 319
|
|
17 20 xf 17 28 aaf aaf 92 319
|
|
17 28 zf 17 20 bbf bbf 33 165
|
|
17 28 zf 17 20 bbf bbf 40 165
|
|
17 28 zf 17 20 bbf bbf 42 165
|
|
17 28 zf 17 20 bbf bbf 50 165
|
|
17 28 zf 17 27 ccf ccf 20 70
|
|
17 28 zf 17 27 ccf ccf 22 70
|
|
17 28 zf 17 27 ccf ccf 28 70
|
|
17 28 zf 17 28 aaf aaf 25 319
|
|
17 28 zf 17 28 aaf aaf 25 319
|
|
17 28 zf 17 28 aaf aaf 30 319
|
|
17 28 zf 17 28 aaf aaf 60 319
|
|
17 28 zf 17 28 aaf aaf 87 319
|
|
17 28 zf 17 28 aaf aaf 92 319
|
|
18 22 tf 18 21 aaf aaf 25 319
|
|
18 22 tf 18 21 aaf aaf 25 319
|
|
18 22 tf 18 21 aaf aaf 30 319
|
|
18 22 tf 18 21 aaf aaf 60 319
|
|
18 22 tf 18 21 aaf aaf 87 319
|
|
18 22 tf 18 21 aaf aaf 92 319
|
|
2 23 b 2 11 aa aa 15 259
|
|
2 23 b 2 11 aa aa 15 259
|
|
2 23 b 2 11 aa aa 20 259
|
|
2 23 b 2 11 aa aa 50 259
|
|
2 23 b 2 11 aa aa 77 259
|
|
2 23 b 2 11 aa aa 82 259
|
|
2 23 b 2 12 aa aa 15 259
|
|
2 23 b 2 12 aa aa 15 259
|
|
2 23 b 2 12 aa aa 20 259
|
|
2 23 b 2 12 aa aa 50 259
|
|
2 23 b 2 12 aa aa 77 259
|
|
2 23 b 2 12 aa aa 82 259
|
|
3 15 x 3 11 dd dd 12 32
|
|
3 15 x 3 11 dd dd 20 32
|
|
7 10 x 7 10 bb bb 23 125
|
|
7 10 x 7 10 bb bb 30 125
|
|
7 10 x 7 10 bb bb 32 125
|
|
7 10 x 7 10 bb bb 40 125
|
|
7 10 x 7 17 cc cc 10 40
|
|
7 10 x 7 17 cc cc 12 40
|
|
7 10 x 7 17 cc cc 18 40
|
|
7 10 x 7 18 aa aa 15 259
|
|
7 10 x 7 18 aa aa 15 259
|
|
7 10 x 7 18 aa aa 20 259
|
|
7 10 x 7 18 aa aa 50 259
|
|
7 10 x 7 18 aa aa 77 259
|
|
7 10 x 7 18 aa aa 82 259
|
|
7 18 z 7 10 bb bb 23 125
|
|
7 18 z 7 10 bb bb 30 125
|
|
7 18 z 7 10 bb bb 32 125
|
|
7 18 z 7 10 bb bb 40 125
|
|
7 18 z 7 17 cc cc 10 40
|
|
7 18 z 7 17 cc cc 12 40
|
|
7 18 z 7 17 cc cc 18 40
|
|
7 18 z 7 18 aa aa 15 259
|
|
7 18 z 7 18 aa aa 15 259
|
|
7 18 z 7 18 aa aa 20 259
|
|
7 18 z 7 18 aa aa 50 259
|
|
7 18 z 7 18 aa aa 77 259
|
|
7 18 z 7 18 aa aa 82 259
|
|
8 12 t 8 11 aa aa 15 259
|
|
8 12 t 8 11 aa aa 15 259
|
|
8 12 t 8 11 aa aa 20 259
|
|
8 12 t 8 11 aa aa 50 259
|
|
8 12 t 8 11 aa aa 77 259
|
|
8 12 t 8 11 aa aa 82 259
|
|
select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
a b c a b c c b sum(b) over (partition by c)
|
|
1 20 a 1 14 bb bb 23 125
|
|
1 20 a 1 14 bb bb 30 125
|
|
1 20 a 1 14 bb bb 32 125
|
|
1 20 a 1 14 bb bb 40 125
|
|
1 30 c 1 14 bb bb 23 125
|
|
1 30 c 1 14 bb bb 30 125
|
|
1 30 c 1 14 bb bb 32 125
|
|
1 30 c 1 14 bb bb 40 125
|
|
11 20 v 11 24 bbf bbf 33 165
|
|
11 20 v 11 24 bbf bbf 40 165
|
|
11 20 v 11 24 bbf bbf 42 165
|
|
11 20 v 11 24 bbf bbf 50 165
|
|
11 30 af 11 24 bbf bbf 33 165
|
|
11 30 af 11 24 bbf bbf 40 165
|
|
11 30 af 11 24 bbf bbf 42 165
|
|
11 30 af 11 24 bbf bbf 50 165
|
|
11 30 d 11 24 bbf bbf 33 165
|
|
11 30 d 11 24 bbf bbf 40 165
|
|
11 30 d 11 24 bbf bbf 42 165
|
|
11 30 d 11 24 bbf bbf 50 165
|
|
11 33 a 11 24 bbf bbf 33 165
|
|
11 33 a 11 24 bbf bbf 40 165
|
|
11 33 a 11 24 bbf bbf 42 165
|
|
11 33 a 11 24 bbf bbf 50 165
|
|
12 23 y 12 21 aaf aaf 25 319
|
|
12 23 y 12 21 aaf aaf 25 319
|
|
12 23 y 12 21 aaf aaf 30 319
|
|
12 23 y 12 21 aaf aaf 60 319
|
|
12 23 y 12 21 aaf aaf 87 319
|
|
12 23 y 12 21 aaf aaf 92 319
|
|
12 23 y 12 22 aaf aaf 25 319
|
|
12 23 y 12 22 aaf aaf 25 319
|
|
12 23 y 12 22 aaf aaf 30 319
|
|
12 23 y 12 22 aaf aaf 60 319
|
|
12 23 y 12 22 aaf aaf 87 319
|
|
12 23 y 12 22 aaf aaf 92 319
|
|
12 33 bf 12 21 aaf aaf 25 319
|
|
12 33 bf 12 21 aaf aaf 25 319
|
|
12 33 bf 12 21 aaf aaf 30 319
|
|
12 33 bf 12 21 aaf aaf 60 319
|
|
12 33 bf 12 21 aaf aaf 87 319
|
|
12 33 bf 12 21 aaf aaf 92 319
|
|
12 33 bf 12 22 aaf aaf 25 319
|
|
12 33 bf 12 22 aaf aaf 25 319
|
|
12 33 bf 12 22 aaf aaf 30 319
|
|
12 33 bf 12 22 aaf aaf 60 319
|
|
12 33 bf 12 22 aaf aaf 87 319
|
|
12 33 bf 12 22 aaf aaf 92 319
|
|
13 25 xf 13 21 ddf ddf 22 52
|
|
13 25 xf 13 21 ddf ddf 30 52
|
|
17 10 s 17 20 bbf bbf 33 165
|
|
17 10 s 17 20 bbf bbf 40 165
|
|
17 10 s 17 20 bbf bbf 42 165
|
|
17 10 s 17 20 bbf bbf 50 165
|
|
17 10 s 17 27 ccf ccf 20 70
|
|
17 10 s 17 27 ccf ccf 22 70
|
|
17 10 s 17 27 ccf ccf 28 70
|
|
17 10 s 17 28 aaf aaf 25 319
|
|
17 10 s 17 28 aaf aaf 25 319
|
|
17 10 s 17 28 aaf aaf 30 319
|
|
17 10 s 17 28 aaf aaf 60 319
|
|
17 10 s 17 28 aaf aaf 87 319
|
|
17 10 s 17 28 aaf aaf 92 319
|
|
17 18 a 17 20 bbf bbf 33 165
|
|
17 18 a 17 20 bbf bbf 40 165
|
|
17 18 a 17 20 bbf bbf 42 165
|
|
17 18 a 17 20 bbf bbf 50 165
|
|
17 18 a 17 27 ccf ccf 20 70
|
|
17 18 a 17 27 ccf ccf 22 70
|
|
17 18 a 17 27 ccf ccf 28 70
|
|
17 18 a 17 28 aaf aaf 25 319
|
|
17 18 a 17 28 aaf aaf 25 319
|
|
17 18 a 17 28 aaf aaf 30 319
|
|
17 18 a 17 28 aaf aaf 60 319
|
|
17 18 a 17 28 aaf aaf 87 319
|
|
17 18 a 17 28 aaf aaf 92 319
|
|
17 20 xf 17 20 bbf bbf 33 165
|
|
17 20 xf 17 20 bbf bbf 40 165
|
|
17 20 xf 17 20 bbf bbf 42 165
|
|
17 20 xf 17 20 bbf bbf 50 165
|
|
17 20 xf 17 27 ccf ccf 20 70
|
|
17 20 xf 17 27 ccf ccf 22 70
|
|
17 20 xf 17 27 ccf ccf 28 70
|
|
17 20 xf 17 28 aaf aaf 25 319
|
|
17 20 xf 17 28 aaf aaf 25 319
|
|
17 20 xf 17 28 aaf aaf 30 319
|
|
17 20 xf 17 28 aaf aaf 60 319
|
|
17 20 xf 17 28 aaf aaf 87 319
|
|
17 20 xf 17 28 aaf aaf 92 319
|
|
17 28 zf 17 20 bbf bbf 33 165
|
|
17 28 zf 17 20 bbf bbf 40 165
|
|
17 28 zf 17 20 bbf bbf 42 165
|
|
17 28 zf 17 20 bbf bbf 50 165
|
|
17 28 zf 17 27 ccf ccf 20 70
|
|
17 28 zf 17 27 ccf ccf 22 70
|
|
17 28 zf 17 27 ccf ccf 28 70
|
|
17 28 zf 17 28 aaf aaf 25 319
|
|
17 28 zf 17 28 aaf aaf 25 319
|
|
17 28 zf 17 28 aaf aaf 30 319
|
|
17 28 zf 17 28 aaf aaf 60 319
|
|
17 28 zf 17 28 aaf aaf 87 319
|
|
17 28 zf 17 28 aaf aaf 92 319
|
|
18 22 tf 18 21 aaf aaf 25 319
|
|
18 22 tf 18 21 aaf aaf 25 319
|
|
18 22 tf 18 21 aaf aaf 30 319
|
|
18 22 tf 18 21 aaf aaf 60 319
|
|
18 22 tf 18 21 aaf aaf 87 319
|
|
18 22 tf 18 21 aaf aaf 92 319
|
|
2 23 b 2 11 aa aa 15 259
|
|
2 23 b 2 11 aa aa 15 259
|
|
2 23 b 2 11 aa aa 20 259
|
|
2 23 b 2 11 aa aa 50 259
|
|
2 23 b 2 11 aa aa 77 259
|
|
2 23 b 2 11 aa aa 82 259
|
|
2 23 b 2 12 aa aa 15 259
|
|
2 23 b 2 12 aa aa 15 259
|
|
2 23 b 2 12 aa aa 20 259
|
|
2 23 b 2 12 aa aa 50 259
|
|
2 23 b 2 12 aa aa 77 259
|
|
2 23 b 2 12 aa aa 82 259
|
|
3 15 x 3 11 dd dd 12 32
|
|
3 15 x 3 11 dd dd 20 32
|
|
7 10 x 7 10 bb bb 23 125
|
|
7 10 x 7 10 bb bb 30 125
|
|
7 10 x 7 10 bb bb 32 125
|
|
7 10 x 7 10 bb bb 40 125
|
|
7 10 x 7 17 cc cc 10 40
|
|
7 10 x 7 17 cc cc 12 40
|
|
7 10 x 7 17 cc cc 18 40
|
|
7 10 x 7 18 aa aa 15 259
|
|
7 10 x 7 18 aa aa 15 259
|
|
7 10 x 7 18 aa aa 20 259
|
|
7 10 x 7 18 aa aa 50 259
|
|
7 10 x 7 18 aa aa 77 259
|
|
7 10 x 7 18 aa aa 82 259
|
|
7 18 z 7 10 bb bb 23 125
|
|
7 18 z 7 10 bb bb 30 125
|
|
7 18 z 7 10 bb bb 32 125
|
|
7 18 z 7 10 bb bb 40 125
|
|
7 18 z 7 17 cc cc 10 40
|
|
7 18 z 7 17 cc cc 12 40
|
|
7 18 z 7 17 cc cc 18 40
|
|
7 18 z 7 18 aa aa 15 259
|
|
7 18 z 7 18 aa aa 15 259
|
|
7 18 z 7 18 aa aa 20 259
|
|
7 18 z 7 18 aa aa 50 259
|
|
7 18 z 7 18 aa aa 77 259
|
|
7 18 z 7 18 aa aa 82 259
|
|
8 12 t 8 11 aa aa 15 259
|
|
8 12 t 8 11 aa aa 15 259
|
|
8 12 t 8 11 aa aa 20 259
|
|
8 12 t 8 11 aa aa 50 259
|
|
8 12 t 8 11 aa aa 77 259
|
|
8 12 t 8 11 aa aa 82 259
|
|
explain extended select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 90 60.00 Using where
|
|
1 PRIMARY t3 ref idx_a idx_a 5 test.t2.a 1 100.00 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 128 test.t3.c 10 100.00
|
|
2 DERIVED t4 ALL idx_c NULL NULL NULL 160 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`c` AS `c`,`t`.`c` AS `c`,`t`.`b` AS `b`,`t`.`sum(b) over (partition by c)` AS `sum(b) over (partition by c)` from `test`.`t2` join `test`.`t3` join (/* select#2 */ select `test`.`t4`.`c` AS `c`,`test`.`t4`.`b` AS `b`,sum(`test`.`t4`.`b`) over ( partition by `test`.`t4`.`c`) AS `sum(b) over (partition by c)` from `test`.`t4`) `t` where `test`.`t3`.`a` = `test`.`t2`.`a` and `t`.`c` = `test`.`t3`.`c` and `test`.`t2`.`b` < 40
|
|
explain format=json select *
|
|
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
|
|
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 90,
|
|
"filtered": 60,
|
|
"attached_condition": "t2.b < 40 and t2.a is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ref",
|
|
"possible_keys": ["idx_a"],
|
|
"key": "idx_a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t2.a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t3.c"],
|
|
"rows": 10,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"window_functions_computation": {
|
|
"sorts": [
|
|
{
|
|
"filesort": {
|
|
"sort_key": "t4.c"
|
|
}
|
|
}
|
|
],
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["idx_c"],
|
|
"rows": 160,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop table t1,t2,t3,t4;
|
|
#
|
|
# MDEV-13709: Optimization for semi-joins of grouping derived tables
|
|
# (Splitting derived tables / views with GROUP BY)
|
|
#
|
|
CREATE TABLE t1 (i int);
|
|
INSERT INTO t1 VALUES (1),(9),(3);
|
|
CREATE TABLE t2 (a int, i int);
|
|
INSERT INTO t2 VALUES (1,9),(2,3),(3,7),(4,1);
|
|
CREATE TABLE t3 (a int, c char(127), index(c));
|
|
INSERT INTO t3 VALUES (1,'foo'),(3,'bar'),(4,'foo'),(2,'bar');
|
|
INSERT INTO t3 SELECT a, concat(c,'a') FROM t3;
|
|
CREATE TABLE t4 (a int, c char(127), index(a));
|
|
INSERT INTO t4 VALUES
|
|
(3,'abc'),(1,'foo'),(4,'def'),(8,'xxx'),(3,'yyy'),
|
|
(5,'zzz'),(9,'xyz'),(2,'yxz'),(5,'zxy'),(7,'zyx') ;
|
|
ANALYZE TABLE t1,t2,t3,t4;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
test.t4 analyze status Engine-independent statistics collected
|
|
test.t4 analyze status OK
|
|
CREATE VIEW v1 AS
|
|
SELECT c FROM t3
|
|
WHERE a IN ( SELECT t2.a FROM t1 JOIN t2 WHERE t1.i = t2.i ) GROUP BY c ;
|
|
set statement optimizer_switch='split_materialized=off' for SELECT * FROM t4 WHERE c IN ( SELECT c FROM v1 ) and a < 2;
|
|
a c
|
|
1 foo
|
|
SELECT * FROM t4 WHERE c IN ( SELECT c FROM v1 ) and a < 2;
|
|
a c
|
|
1 foo
|
|
explain extended SELECT * FROM t4 WHERE c IN ( SELECT c FROM v1 ) and a < 2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t4 range a a 5 NULL 1 100.00 Using index condition; Using where
|
|
1 PRIMARY <derived3> ref key0 key0 128 test.t4.c 2 100.00 FirstMatch(t4)
|
|
3 LATERAL DERIVED t3 ref c c 128 test.t4.c 2 100.00
|
|
3 LATERAL DERIVED <subquery4> eq_ref distinct_key distinct_key 4 func 1 100.00
|
|
4 MATERIALIZED t1 ALL NULL NULL NULL NULL 3 100.00
|
|
4 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`c` AS `c` from `test`.`t4` semi join (`test`.`v1`) where `v1`.`c` = `test`.`t4`.`c` and `test`.`t4`.`a` < 2
|
|
explain format=json SELECT * FROM t4 WHERE c IN ( SELECT c FROM v1 ) and a < 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t4",
|
|
"access_type": "range",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"index_condition": "t4.a < 2",
|
|
"attached_condition": "t4.c is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived3>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t4.c"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"first_match": "t4",
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"const_condition": "1",
|
|
"outer_ref_condition": "t4.c is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ref",
|
|
"possible_keys": ["c"],
|
|
"key": "c",
|
|
"key_length": "128",
|
|
"used_key_parts": ["c"],
|
|
"ref": ["test.t4.c"],
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery4>",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["distinct_key"],
|
|
"key": "distinct_key",
|
|
"key_length": "4",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["func"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 4,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "65",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.i = t1.i and t2.i = t1.i"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2,t3,t4;
|
|
#
|
|
# MDEV-13710: Optimization for equi-joins of grouping derived tables
|
|
# (Splitting derived tables / views with GROUP BY) :
|
|
# FROM list of the derived table contains constant tables
|
|
#
|
|
CREATE TABLE t1 (a int, INDEX(a)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (9),(5),(1);
|
|
CREATE TABLE t2 (b int) ENGINE=MyISAM;
|
|
CREATE TABLE t3 (c varchar(8), d int) ENGINE=MyISAM;
|
|
INSERT INTO t3 VALUES ('foo',2),('bar',6);
|
|
CREATE VIEW v1 AS SELECT a FROM t1, t2 GROUP BY a;
|
|
SELECT * FROM t3
|
|
WHERE d IN ( SELECT * FROM v1 ) AND c LIKE 'z%' OR c IS NULL;
|
|
c d
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# MDEV-13734: Optimization for equi-joins of grouping derived tables
|
|
# (Splitting derived tables / views with GROUP BY) :
|
|
# derived table / view is empty
|
|
#
|
|
CREATE TABLE t1 (a int, b int, INDEX(a)) ENGINE=MyISAM;
|
|
CREATE TABLE t2 (c int) ENGINE=MyISAM;
|
|
CREATE VIEW v1 AS SELECT a, b FROM t1 STRAIGHT_JOIN t2;
|
|
CREATE VIEW v2 AS SELECT a, max(b) as bmax FROM v1 GROUP BY a;
|
|
CREATE VIEW v3 AS SELECT v2.* FROM t1 JOIN v2 ON t1.b = v2.bmax ;
|
|
SELECT * FROM v3 JOIN t1 ON (bmax = b);
|
|
a bmax a b
|
|
DROP VIEW v1,v2,v3;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-14845: Impossible where for derived with GROUP BY
|
|
#
|
|
CREATE TABLE t1 (pk INT PRIMARY KEY);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
WITH cte AS ( SELECT pk FROM t1 WHERE pk IS NULL GROUP BY pk )
|
|
SELECT * FROM cte;
|
|
pk
|
|
EXPLAIN EXTENDED WITH cte AS ( SELECT pk FROM t1 WHERE pk IS NULL GROUP BY pk )
|
|
SELECT * FROM cte;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived2> system NULL NULL NULL NULL 0 0.00 Const row not found
|
|
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
|
Warnings:
|
|
Note 1003 with cte as (/* select#2 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` where 0 group by `test`.`t1`.`pk`)/* select#1 */ select NULL AS `pk` from `cte`
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-14880: assertion failure in optimizer when splitting is applied
|
|
#
|
|
CREATE TABLE t1 (pk1 INT PRIMARY KEY, f INT) ENGINE=Aria;
|
|
INSERT INTO t1 VALUES (1,0),(2,0);
|
|
CREATE TABLE t2 (pk2 INT PRIMARY KEY) ENGINE=Aria;
|
|
INSERT INTO t2 VALUES (1),(2),(3);
|
|
CREATE VIEW v2 AS SELECT pk2, COUNT(*) AS cnt FROM t2 GROUP BY pk2;
|
|
SELECT * FROM t1 INNER JOIN v2 ON pk1 = pk2 WHERE f <> 5;
|
|
pk1 f pk2 cnt
|
|
1 0 1 1
|
|
2 0 2 1
|
|
EXPLAIN EXTENDED SELECT * FROM t1 INNER JOIN v2 ON pk1 = pk2 WHERE f <> 5;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 2 100.00 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 4 test.t1.pk1 2 100.00
|
|
2 LATERAL DERIVED t2 eq_ref PRIMARY PRIMARY 4 test.t1.pk1 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`pk1` AS `pk1`,`test`.`t1`.`f` AS `f`,`v2`.`pk2` AS `pk2`,`v2`.`cnt` AS `cnt` from `test`.`t1` join `test`.`v2` where `v2`.`pk2` = `test`.`t1`.`pk1` and `test`.`t1`.`f` <> 5
|
|
EXPLAIN FORMAT=JSON SELECT * FROM t1 INNER JOIN v2 ON pk1 = pk2 WHERE f <> 5;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["PRIMARY"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.f <> 5"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "4",
|
|
"used_key_parts": ["pk2"],
|
|
"ref": ["test.t1.pk1"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["PRIMARY"],
|
|
"key": "PRIMARY",
|
|
"key_length": "4",
|
|
"used_key_parts": ["pk2"],
|
|
"ref": ["test.t1.pk1"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"using_index": true
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
DROP VIEW v2;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-15017: splittable table is constant table
|
|
#
|
|
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
|
|
CREATE TABLE t2 (pk INT, b INT, PRIMARY KEY (pk)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (1,2),(3,4);
|
|
CREATE VIEW v2 AS SELECT pk, MIN(b) FROM t2 GROUP BY pk;
|
|
SELECT * FROM t1 LEFT JOIN v2 ON (a = pk);
|
|
a pk MIN(b)
|
|
DROP VIEW v2;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-14994: splittable table with no rows
|
|
#
|
|
CREATE TABLE t1 (f INT PRIMARY KEY) ENGINE=MyISAM;
|
|
CREATE VIEW v1 AS SELECT a.* FROM t1 AS a STRAIGHT_JOIN t1 AS b;
|
|
CREATE VIEW v2 AS SELECT f FROM v1 GROUP BY f;
|
|
SELECT * FROM v1 JOIN v2 ON v1.f = v2.f;
|
|
f f
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM v1 JOIN v2 ON v1.f = v2.f;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select NULL AS `f`,`v2`.`f` AS `f` from `test`.`t1` `a` straight_join `test`.`t1` `b` join `test`.`v2` where 0
|
|
DROP VIEW v1,v2;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-15899: derived with WF without any key access
|
|
#
|
|
create table t1 (f1 int, f2 int, f4 int);
|
|
insert into t1 values
|
|
(3,1,1), (3,0,9), (0,1,8), (9,0,0), (3,0,9);
|
|
with
|
|
cte as (select median(f2) over (partition by f1) as k1 from t1 order by f1),
|
|
cte1 as (select median(f4) over (partition by f1) as k2 from t1)
|
|
select k1,k2 from cte1, cte;
|
|
k1 k2
|
|
0.0000000000 0.0000000000
|
|
0.0000000000 0.0000000000
|
|
0.0000000000 0.0000000000
|
|
0.0000000000 0.0000000000
|
|
0.0000000000 8.0000000000
|
|
0.0000000000 8.0000000000
|
|
0.0000000000 8.0000000000
|
|
0.0000000000 8.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
0.0000000000 9.0000000000
|
|
1.0000000000 0.0000000000
|
|
1.0000000000 8.0000000000
|
|
1.0000000000 9.0000000000
|
|
1.0000000000 9.0000000000
|
|
1.0000000000 9.0000000000
|
|
explain with
|
|
cte as (select median(f2) over (partition by f1) as k1 from t1 order by f1),
|
|
cte1 as (select median(f4) over (partition by f1) as k2 from t1)
|
|
select k1,k2 from cte1, cte;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 5
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 5 Using temporary
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
|
|
drop table t1;
|
|
#
|
|
# MDEV-16104: embedded splittable materialized derived/views
|
|
#
|
|
CREATE TABLE t1 (f int PRIMARY KEY) ENGINE=MyISAM;
|
|
INSERT INTO t1
|
|
VALUES (3), (7), (1), (4), (8), (5), (9);
|
|
CREATE ALGORITHM=MERGE VIEW v1 AS
|
|
SELECT a2.*
|
|
FROM
|
|
( SELECT f, COUNT(*) as c FROM t1 GROUP BY f ) AS a1
|
|
JOIN
|
|
t1 AS a2
|
|
USING (f);
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM ( SELECT STRAIGHT_JOIN f, COUNT(*) as c FROM v1 GROUP BY f ) AS s;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 7 100.00
|
|
2 DERIVED <derived4> ALL NULL NULL NULL NULL 7 100.00 Using temporary; Using filesort
|
|
2 DERIVED a2 eq_ref PRIMARY PRIMARY 4 a1.f 1 100.00 Using index
|
|
4 DERIVED t1 index PRIMARY PRIMARY 4 NULL 7 100.00 Using index; Using temporary; Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `s`.`f` AS `f`,`s`.`c` AS `c` from (/* select#2 */ select straight_join `a2`.`f` AS `f`,count(0) AS `c` from (/* select#4 */ select `test`.`t1`.`f` AS `f`,count(0) AS `c` from `test`.`t1` group by `test`.`t1`.`f`) `a1` join `test`.`t1` `a2` where `a2`.`f` = `a1`.`f` group by `a2`.`f`) `s`
|
|
SELECT * FROM ( SELECT STRAIGHT_JOIN f, COUNT(*) as c FROM v1 GROUP BY f ) AS s;
|
|
f c
|
|
1 1
|
|
3 1
|
|
4 1
|
|
5 1
|
|
7 1
|
|
8 1
|
|
9 1
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-16801: splittable materialized derived/views with
|
|
# one grouping field from table without keys
|
|
#
|
|
CREATE TABLE t1 (a int, b int, INDEX idx_a(a), INDEX idx_b(b)) ENGINE=MYISAM;
|
|
CREATE TABLE t2 (c int) ENGINE=MYISAM;
|
|
CREATE TABLE t3 (d int) ENGINE=MYISAM;
|
|
INSERT INTO t1 VALUES
|
|
(77,7), (11,1), (33,3), (44,4), (8,88),
|
|
(78,7), (98,9), (38,3), (28,2), (79,7),
|
|
(58,5), (42,4), (71,7), (27,2), (91,9);
|
|
INSERT INTO t1 SELECT a+100, b+10 FROM t1;
|
|
INSERT INTO t2 VALUES
|
|
(100), (700), (200), (100), (200);
|
|
INSERT INTO t3 VALUES
|
|
(3), (4), (1), (8), (3);
|
|
ANALYZE tables t1,t2,t3;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
SELECT *
|
|
FROM t3,
|
|
(SELECT t1.b, t2.c
|
|
FROM t1, t2
|
|
GROUP BY t1.b,t2.c) dt
|
|
WHERE t3.d = dt.b;
|
|
d b c
|
|
3 3 700
|
|
3 3 200
|
|
3 3 100
|
|
4 4 700
|
|
4 4 200
|
|
4 4 100
|
|
1 1 700
|
|
1 1 200
|
|
1 1 100
|
|
3 3 700
|
|
3 3 200
|
|
3 3 100
|
|
EXPLAIN EXTENDED SELECT *
|
|
FROM t3,
|
|
(SELECT t1.b, t2.c
|
|
FROM t1, t2
|
|
GROUP BY t1.b,t2.c) dt
|
|
WHERE t3.d = dt.b;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t3.d 2 100.00
|
|
2 LATERAL DERIVED t1 ref idx_b idx_b 5 test.t3.d 1 100.00 Using index; Using temporary; Using filesort
|
|
2 LATERAL DERIVED t2 ALL NULL NULL NULL NULL 5 100.00 Using join buffer (flat, BNL join)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t3`.`d` AS `d`,`dt`.`b` AS `b`,`dt`.`c` AS `c` from `test`.`t3` join (/* select#2 */ select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`b` = `test`.`t3`.`d` group by `test`.`t1`.`b`,`test`.`t2`.`c`) `dt` where `dt`.`b` = `test`.`t3`.`d`
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# MDEV-17419: splittable materialized derived/view
|
|
# when join_cache_level = 4
|
|
#
|
|
set join_cache_level = 4;
|
|
CREATE TABLE t1 (
|
|
id INT UNSIGNED NOT NULL AUTO_INCREMENT,
|
|
username VARCHAR(50) NULL DEFAULT '0',
|
|
PRIMARY KEY (id)
|
|
) COLLATE='utf8_general_ci';
|
|
CREATE TABLE t2 (
|
|
id INT UNSIGNED NOT NULL AUTO_INCREMENT,
|
|
userid INT UNSIGNED NOT NULL,
|
|
logindate DATETIME NOT NULL,
|
|
PRIMARY KEY (id)
|
|
) COLLATE='utf8_general_ci';
|
|
INSERT INTO t1 (id, username) VALUES
|
|
(1,"user1"), (2, "user2");
|
|
INSERT INTO t2 (id, userid, logindate) VALUES
|
|
(1,1,"2015-06-19 12:17:02.828"),
|
|
(2,1,"2016-06-19 12:17:02.828"),
|
|
(3,2,"2017-06-19 12:17:02.828"),
|
|
(4,2,"2018-06-19 12:17:02.828");
|
|
EXPLAIN select * from t1 as u
|
|
left join
|
|
(select * from t2 as au group by au.userid) as auditlastlogin
|
|
on u.id=auditlastlogin.userid;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY u ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.u.id 2
|
|
2 DERIVED au ALL NULL NULL NULL NULL 4 Using temporary; Using filesort
|
|
select * from t1 as u
|
|
left join
|
|
(select * from t2 as au group by au.userid) as auditlastlogin
|
|
on u.id=auditlastlogin.userid;
|
|
id username id userid logindate
|
|
1 user1 1 1 2015-06-19 12:17:02
|
|
2 user2 3 2 2017-06-19 12:17:02
|
|
set join_cache_level=default;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-21614: potentially splittable materialized derived/view
|
|
# within materialized semi-join
|
|
#
|
|
create table t1 (
|
|
id int not null auto_increment primary key,
|
|
a int not null
|
|
) engine=myisam;
|
|
create table t2 (
|
|
id int not null auto_increment primary key,
|
|
ro_id int not null,
|
|
flag int not null, key (ro_id)
|
|
) engine=myisam;
|
|
insert into t1(a) select seq+100 from seq_1_to_20;
|
|
insert into t2(ro_id,flag) select seq, 1 from seq_1_to_20;
|
|
insert into t2(ro_id,flag) select seq, 0 from seq_1_to_20;
|
|
create view v1 as
|
|
select t1.* from t1 left join t2 on (t1.id = t2.ro_id AND t2.flag = 1)
|
|
group by t1.id;
|
|
select id, a from t1 where id in (select id from v1);
|
|
id a
|
|
1 101
|
|
2 102
|
|
3 103
|
|
4 104
|
|
5 105
|
|
6 106
|
|
7 107
|
|
8 108
|
|
9 109
|
|
10 110
|
|
11 111
|
|
12 112
|
|
13 113
|
|
14 114
|
|
15 115
|
|
16 116
|
|
17 117
|
|
18 118
|
|
19 119
|
|
20 120
|
|
explain extended select id, a from t1 where id in (select id from v1);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 20 100.00
|
|
1 PRIMARY <derived3> ref key0 key0 4 test.t1.id 2 100.00 FirstMatch(t1)
|
|
3 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 4 test.t1.id 1 100.00
|
|
3 LATERAL DERIVED t2 ref ro_id ro_id 4 test.t1.id 1 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`v1`) where `v1`.`id` = `test`.`t1`.`id`
|
|
select id, a from t1
|
|
where id in (select id
|
|
from (select t1.* from t1 left join t2
|
|
on (t1.id = t2.ro_id AND t2.flag = 1)
|
|
group by t1.id) dt);
|
|
id a
|
|
1 101
|
|
2 102
|
|
3 103
|
|
4 104
|
|
5 105
|
|
6 106
|
|
7 107
|
|
8 108
|
|
9 109
|
|
10 110
|
|
11 111
|
|
12 112
|
|
13 113
|
|
14 114
|
|
15 115
|
|
16 116
|
|
17 117
|
|
18 118
|
|
19 119
|
|
20 120
|
|
explain extended select id, a from t1
|
|
where id in (select id
|
|
from (select t1.* from t1 left join t2
|
|
on (t1.id = t2.ro_id AND t2.flag = 1)
|
|
group by t1.id) dt);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 20 100.00
|
|
1 PRIMARY <derived3> ref key0 key0 4 test.t1.id 2 100.00 FirstMatch(t1)
|
|
3 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 4 test.t1.id 1 100.00
|
|
3 LATERAL DERIVED t2 ref ro_id ro_id 4 test.t1.id 1 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`a` AS `a` from `test`.`t1` semi join ((/* select#3 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`a` AS `a` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`ro_id` = `test`.`t1`.`id` and `test`.`t2`.`flag` = 1) where `test`.`t1`.`id` = `test`.`t1`.`id` group by `test`.`t1`.`id`) `dt`) where `dt`.`id` = `test`.`t1`.`id`
|
|
drop view v1;
|
|
drop table t1,t2;
|
|
#
|
|
# MDEV-21883: potentially splittable materialized derived
|
|
# that uses a join of 32 tables
|
|
#
|
|
CREATE TABLE t (id INT NOT NULL PRIMARY KEY);
|
|
INSERT INTO t values (1),(2),(3);
|
|
set statement optimizer_switch='split_materialized=off' for SELECT t.id FROM t
|
|
LEFT JOIN (
|
|
SELECT t0.id FROM t AS t0
|
|
LEFT JOIN t AS t1 ON 0=1
|
|
LEFT JOIN t AS t2 ON 0=1
|
|
LEFT JOIN t AS t3 ON 0=1
|
|
LEFT JOIN t AS t4 ON 0=1
|
|
LEFT JOIN t AS t5 ON 0=1
|
|
LEFT JOIN t AS t6 ON 0=1
|
|
LEFT JOIN t AS t7 ON 0=1
|
|
LEFT JOIN t AS t8 ON 0=1
|
|
LEFT JOIN t AS t9 ON 0=1
|
|
LEFT JOIN t AS t10 ON 0=1
|
|
LEFT JOIN t AS t11 ON 0=1
|
|
LEFT JOIN t AS t12 ON 0=1
|
|
LEFT JOIN t AS t13 ON 0=1
|
|
LEFT JOIN t AS t14 ON 0=1
|
|
LEFT JOIN t AS t15 ON 0=1
|
|
LEFT JOIN t AS t16 ON 0=1
|
|
LEFT JOIN t AS t17 ON 0=1
|
|
LEFT JOIN t AS t18 ON 0=1
|
|
LEFT JOIN t AS t19 ON 0=1
|
|
LEFT JOIN t AS t20 ON 0=1
|
|
LEFT JOIN t AS t21 ON 0=1
|
|
LEFT JOIN t AS t22 ON 0=1
|
|
LEFT JOIN t AS t23 ON 0=1
|
|
LEFT JOIN t AS t24 ON 0=1
|
|
LEFT JOIN t AS t25 ON 0=1
|
|
LEFT JOIN t AS t26 ON 0=1
|
|
LEFT JOIN t AS t27 ON 0=1
|
|
LEFT JOIN t AS t28 ON 0=1
|
|
LEFT JOIN t AS t29 ON 0=1
|
|
LEFT JOIN t AS t30 ON 0=1
|
|
LEFT JOIN t AS t31 ON 0=1
|
|
GROUP BY t0.id) AS dt ON dt.id = t.id;
|
|
id
|
|
1
|
|
2
|
|
3
|
|
set statement optimizer_switch='split_materialized=on' for SELECT t.id FROM t
|
|
LEFT JOIN (
|
|
SELECT t0.id FROM t AS t0
|
|
LEFT JOIN t AS t1 ON 0=1
|
|
LEFT JOIN t AS t2 ON 0=1
|
|
LEFT JOIN t AS t3 ON 0=1
|
|
LEFT JOIN t AS t4 ON 0=1
|
|
LEFT JOIN t AS t5 ON 0=1
|
|
LEFT JOIN t AS t6 ON 0=1
|
|
LEFT JOIN t AS t7 ON 0=1
|
|
LEFT JOIN t AS t8 ON 0=1
|
|
LEFT JOIN t AS t9 ON 0=1
|
|
LEFT JOIN t AS t10 ON 0=1
|
|
LEFT JOIN t AS t11 ON 0=1
|
|
LEFT JOIN t AS t12 ON 0=1
|
|
LEFT JOIN t AS t13 ON 0=1
|
|
LEFT JOIN t AS t14 ON 0=1
|
|
LEFT JOIN t AS t15 ON 0=1
|
|
LEFT JOIN t AS t16 ON 0=1
|
|
LEFT JOIN t AS t17 ON 0=1
|
|
LEFT JOIN t AS t18 ON 0=1
|
|
LEFT JOIN t AS t19 ON 0=1
|
|
LEFT JOIN t AS t20 ON 0=1
|
|
LEFT JOIN t AS t21 ON 0=1
|
|
LEFT JOIN t AS t22 ON 0=1
|
|
LEFT JOIN t AS t23 ON 0=1
|
|
LEFT JOIN t AS t24 ON 0=1
|
|
LEFT JOIN t AS t25 ON 0=1
|
|
LEFT JOIN t AS t26 ON 0=1
|
|
LEFT JOIN t AS t27 ON 0=1
|
|
LEFT JOIN t AS t28 ON 0=1
|
|
LEFT JOIN t AS t29 ON 0=1
|
|
LEFT JOIN t AS t30 ON 0=1
|
|
LEFT JOIN t AS t31 ON 0=1
|
|
GROUP BY t0.id) AS dt ON dt.id = t.id;
|
|
id
|
|
1
|
|
2
|
|
3
|
|
DROP TABLE t;
|
|
#
|
|
# MDEV-23804: Server crashes in st_select_lex::collect_grouping_fields_for_derived
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (3),(4);
|
|
CREATE VIEW v1 AS SELECT a FROM t1 UNION VALUES (3),(4);
|
|
ANALYZE FORMAT=JSON SELECT * from v1 WHERE a=3;
|
|
ANALYZE
|
|
{
|
|
"query_optimization": {
|
|
"r_total_time_ms": "REPLACED"
|
|
},
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 4,
|
|
"r_rows": 2,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 50,
|
|
"attached_condition": "v1.a = 3",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"r_rows": 2,
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 2,
|
|
"r_rows": 2,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_filtered": 50,
|
|
"attached_condition": "t1.a = 3"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"message": "No tables used"
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
SELECT * from v1 WHERE a=3;
|
|
a
|
|
3
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-25128: Split optimization for join with materialized semi-join
|
|
#
|
|
create table t1 (id int, a int, index (a), index (id, a)) engine=myisam;
|
|
insert into t1 values
|
|
(17,1),(17,3010),(17,3013),(17,3053),(21,2446),(21,2467),(21,2);
|
|
create table t2 (a int) engine=myisam;
|
|
insert into t2 values (1),(2),(3);
|
|
create table t3 (id int) engine=myisam;
|
|
insert into t3 values (1),(2);
|
|
analyze table t1,t2,t3;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
set optimizer_switch="split_materialized=off";
|
|
select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2);
|
|
id a a id
|
|
17 1 1 1
|
|
21 2 2 2
|
|
explain select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where
|
|
1 PRIMARY t1 ref a a 5 test.t3.id 1
|
|
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t3.id 2
|
|
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
|
|
2 DERIVED cp2 range NULL a 5 NULL 8 Using index for group-by
|
|
explain format=json select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.`id` is not null and t3.`id` is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t3.id"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["distinct_key"],
|
|
"key": "distinct_key",
|
|
"key_length": "4",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["func"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t3.id"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "cp2",
|
|
"access_type": "range",
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"rows": 8,
|
|
"filtered": 100,
|
|
"using_index_for_group_by": true
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set optimizer_switch="split_materialized=default";
|
|
select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2);
|
|
id a a id
|
|
17 1 1 1
|
|
21 2 2 2
|
|
explain select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where
|
|
1 PRIMARY t1 ref a a 5 test.t3.id 1
|
|
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t3.id 2
|
|
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
|
|
2 LATERAL DERIVED cp2 ref a a 5 test.t1.a 1 Using where; Using index
|
|
explain format=json select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2);
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.`id` is not null and t3.`id` is not null"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t3.id"],
|
|
"rows": 1,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<subquery3>",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["distinct_key"],
|
|
"key": "distinct_key",
|
|
"key_length": "4",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["func"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"unique": 1,
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t3.id"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"outer_ref_condition": "t1.a is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "cp2",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.a"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "cp2.a = t3.`id`",
|
|
"using_index": true
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
prepare stmt from "select * from t1, (select a from t1 cp2 group by a) dt, t3
|
|
where dt.a = t1.a and t1.a = t3.id and t1.a in (select a from t2)";
|
|
execute stmt;
|
|
id a a id
|
|
17 1 1 1
|
|
21 2 2 2
|
|
execute stmt;
|
|
id a a id
|
|
17 1 1 1
|
|
21 2 2 2
|
|
deallocate prepare stmt;
|
|
drop table t1,t2,t3;
|
|
#
|
|
# MDEV-MDEV-27132: Splittable derived with equality in WHERE
|
|
#
|
|
CREATE TABLE t1 (
|
|
id int PRIMARY KEY
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
(-1),(2070),(4826),(4827),(4828),(4829),(4830),(4831),(4832),(4833),(4834),
|
|
(4835),(4836),(4837),(4838),(4839),(4840),(4841),(4842),(4843),(4844),
|
|
(4845),(4846),(4847),(4848),(4849),(4850),(4851),(4852),(4853),(4854),
|
|
(4855),(4856),(4857),(4858),(4859),(4860),(4861),(4862),(4863),(4864),
|
|
(4865),(4866),(4867),(4868),(4869),(4870),(4871),(4872),(4873),(4874),
|
|
(4875),(4876);
|
|
CREATE TABLE t2 (
|
|
id int PRIMARY KEY AUTO_INCREMENT,
|
|
deleted int(1),
|
|
t1_id int,
|
|
email varchar(255),
|
|
reporting_person int(1),
|
|
KEY t1_id (t1_id)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES
|
|
(1,0,2064,'1test@test.ee',1),(2,1626095588,2066,'2test@test.ee',1),
|
|
(3,0,2066,'3test@test.ee',1),(4,0,2068,'4test@test.ee',1),
|
|
(5,0,2068,'5test@test.ee',1),(6,0,2069,'6test@test.ee',1),(7,0,2070,'',0),
|
|
(8,0,2070,'',0),(9,0,2071,'',0),(10,0,2071,'',0),(11,0,2072,'',0),
|
|
(12,0,2072,'',0),(13,0,2072,'13test@test.ee',1),(14,0,2073,'14test@test.ee',1),
|
|
(15,0,2074,'15test@test.ee',1),(16,0,2075,'16test@test.ee',1),(17,0,2075,'',0),
|
|
(18,0,2075,'',0),(19,0,2076,'19test@test.ee',1),(20,0,2077,'',0),
|
|
(21,0,2078,'21test@test.ee',1),(22,0,2078,'22test@test.ee',1);
|
|
INSERT INTO t2(deleted, t1_id, email, reporting_person)
|
|
SELECT deleted, t1_id, email, reporting_person FROM t2;
|
|
INSERT INTO t2(deleted, t1_id, email, reporting_person)
|
|
SELECT deleted, t1_id+10000, email, reporting_person FROM t2;
|
|
INSERT INTO t2(deleted, t1_id, email, reporting_person)
|
|
SELECT deleted, t1_id+20000, email, reporting_person FROM t2;
|
|
INSERT INTO t2(deleted, t1_id, email, reporting_person)
|
|
SELECT deleted, t1_id+40000, email, reporting_person FROM t2;
|
|
INSERT INTO t2(deleted, t1_id, email, reporting_person)
|
|
SELECT deleted, t1_id+80000, email, reporting_person FROM t2;
|
|
INSERT INTO t2(deleted, t1_id, email, reporting_person)
|
|
SELECT deleted, t1_id+160000, email, reporting_person FROM t2;
|
|
CREATE TABLE t3 (
|
|
id int PRIMARY KEY,
|
|
deleted int,
|
|
t1_id int,
|
|
YEAR int(4),
|
|
quarter int(1),
|
|
KEY t1_id (t1_id,year,quarter)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t3 VALUES
|
|
(1,0,3885,2020,1),(2,0,2064,2020,1),(3,1611670734,2225,2020,1),
|
|
(4,0,2070,2020,1),(5,1611055981,2095,2020,1),(6,1610970096,2102,2020,1),
|
|
(7,0,3974,2020,1),(153,1609851928,3892,2020,2),(154,0,3885,2020,2),
|
|
(155,0,2064,2020,2),(156,1611670717,2225,2020,2),(157,0,2070,2020,2),
|
|
(317,0,2257,2020,2),(318,0,3885,2020,3),(319,0,2064,2020,3),
|
|
(320,1611670709,2225,2020,3),(321,0,2070,2020,3),(322,0,2095,2020,3),
|
|
(323,0,2102,2020,3),(324,0,3974,2020,3),(325,0,3886,2020,3),
|
|
(326,1609939963,2104,2020,3),(327,0,3887,2020,3),(328,0,3888,2020,3),
|
|
(329,0,2148,2020,3),(330,0,3889,2020,3),(331,0,3890,2020,3),
|
|
(332,0,2179,2020,3),(333,0,2115,2020,3),(334,0,2193,2020,3),
|
|
(335,0,2213,2020,3),(336,0,3891,2020,3),(337,1609851955,3892,2020,3),
|
|
(338,1610447706,2232,2020,3),(339,0,2235,2020,3),(340,0,2237,2020,3),
|
|
(341,0,3972,2020,3),(342,1610449357,2242,2020,3),(343,0,3893,2020,3),
|
|
(344,0,2257,2020,3),(345,0,3951,2020,3),(346,0,3894,2020,3),
|
|
(347,0,3912,2020,3),(348,0,3895,2020,3),(349,0,2301,2020,3),
|
|
(350,0,2304,2020,3),(351,0,3896,2020,3);
|
|
ANALYZE TABLE t1,t2,t3;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
set optimizer_switch='split_materialized=on';
|
|
SELECT t1.id
|
|
FROM t1
|
|
JOIN t3
|
|
ON t3.t1_id = t1.id
|
|
JOIN (SELECT t1_id FROM t2 WHERE reporting_person = 1 GROUP BY t1_id) tx
|
|
ON tx.t1_id = t1.id
|
|
WHERE t1.id BETWEEN 200 AND 100000;
|
|
id
|
|
EXPLAIN SELECT t1.id
|
|
FROM t1
|
|
JOIN t3
|
|
ON t3.t1_id = t1.id
|
|
JOIN (SELECT t1_id FROM t2 WHERE reporting_person = 1 GROUP BY t1_id) tx
|
|
ON tx.t1_id = t1.id
|
|
WHERE t1.id BETWEEN 200 AND 100000;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 range t1_id t1_id 5 NULL 47 Using where; Using index
|
|
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t3.t1_id 1 Using index
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t3.t1_id 2
|
|
2 LATERAL DERIVED t2 ref t1_id t1_id 5 test.t1.id 3 Using index condition; Using where
|
|
EXPLAIN FORMAT=JSON SELECT t1.id
|
|
FROM t1
|
|
JOIN t3
|
|
ON t3.t1_id = t1.id
|
|
JOIN (SELECT t1_id FROM t2 WHERE reporting_person = 1 GROUP BY t1_id) tx
|
|
ON tx.t1_id = t1.id
|
|
WHERE t1.id BETWEEN 200 AND 100000;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "range",
|
|
"possible_keys": ["t1_id"],
|
|
"key": "t1_id",
|
|
"key_length": "5",
|
|
"used_key_parts": ["t1_id"],
|
|
"rows": 47,
|
|
"filtered": 100,
|
|
"attached_condition": "t3.t1_id between 200 and 100000 and t3.t1_id is not null",
|
|
"using_index": true
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["PRIMARY"],
|
|
"key": "PRIMARY",
|
|
"key_length": "4",
|
|
"used_key_parts": ["id"],
|
|
"ref": ["test.t3.t1_id"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"using_index": true
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["t1_id"],
|
|
"ref": ["test.t3.t1_id"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ref",
|
|
"possible_keys": ["t1_id"],
|
|
"key": "t1_id",
|
|
"key_length": "5",
|
|
"used_key_parts": ["t1_id"],
|
|
"ref": ["test.t1.id"],
|
|
"rows": 3,
|
|
"filtered": 59.09090805,
|
|
"index_condition": "t2.t1_id between 200 and 100000 and t2.t1_id = t3.t1_id",
|
|
"attached_condition": "t2.reporting_person = 1"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set optimizer_switch='split_materialized=off';
|
|
SELECT t1.id
|
|
FROM t1
|
|
JOIN t3
|
|
ON t3.t1_id = t1.id
|
|
JOIN (SELECT t1_id FROM t2 WHERE reporting_person = 1 GROUP BY t1_id) tx
|
|
ON tx.t1_id = t1.id
|
|
WHERE t1.id BETWEEN 200 AND 100000;
|
|
id
|
|
set optimizer_switch='split_materialized=default';
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# MDEV-27510: Splittable derived with grouping over two tables
|
|
#
|
|
CREATE TABLE ledgers (
|
|
id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
|
|
name VARCHAR(32)
|
|
) ENGINE=MyISAM;
|
|
CREATE TABLE charges (
|
|
id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
|
|
from_ledger_id BIGINT UNSIGNED NOT NULL,
|
|
to_ledger_id BIGINT UNSIGNED NOT NULL,
|
|
amount INT NOT NULL,
|
|
KEY fk_charge_from_ledger (from_ledger_id),
|
|
KEY fk_charge_to_ledger (to_ledger_id)
|
|
) ENGINE=MyISAM;
|
|
CREATE TABLE transactions (
|
|
id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
|
|
ledger_id BIGINT UNSIGNED NOT NULL,
|
|
KEY fk_transactions_ledger (ledger_id)
|
|
) ENGINE=MyISAM;
|
|
CREATE TABLE transaction_items (
|
|
id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
|
|
transaction_id BIGINT UNSIGNED NOT NULL,
|
|
charge_id BIGINT UNSIGNED,
|
|
amount INT NOT NULL,
|
|
KEY fk_items_transaction (transaction_id),
|
|
KEY fk_items_charge (charge_id)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO ledgers (id, name) VALUES
|
|
(1, 'Anna'), (2, 'John'), (3, 'Fred');
|
|
INSERT INTO charges (id, from_ledger_id, to_ledger_id, amount) VALUES
|
|
(1, 2, 1, 200), (2, 1, 2, 330), (3, 1, 2, 640), (4, 3, 1, 640), (5, 3, 2, 1000),
|
|
(6, 3, 1, 660), (7, 2, 3, 650), (8, 3, 2, 160), (9, 2, 1, 740), (10, 3, 2, 310),
|
|
(11, 2, 1, 640), (12, 3, 2, 240), (13, 3, 2, 340), (14, 2, 1, 720),
|
|
(15, 2, 3, 100),
|
|
(16, 2, 3, 980), (17, 2, 1, 80), (18, 1, 2, 760), (19, 2, 3, 740),
|
|
(20, 2, 1, 990);
|
|
INSERT INTO transactions (id, ledger_id) VALUES
|
|
(2, 1), (3, 1), (5, 1), (8, 1), (12, 1), (18, 1), (22, 1), (28, 1),
|
|
(34, 1), (35, 1),
|
|
(40, 1), (1, 2), (4, 2), (6, 2), (10, 2), (13, 2), (16, 2), (17, 2),
|
|
(20, 2), (21, 2),
|
|
(24, 2), (26, 2), (27, 2), (29, 2), (31, 2), (33, 2), (36, 2), (37, 2),
|
|
(39, 2), (7, 3),
|
|
(9, 3), (11, 3), (14, 3), (15, 3), (19, 3), (23, 3), (25, 3), (30, 3),
|
|
(32, 3), (38, 3);
|
|
INSERT INTO transaction_items (id, transaction_id, charge_id, amount) VALUES
|
|
(1, 1, 1, -200), (2, 2, 1, 200), (3, 3, 2, -330), (4, 4, 2, 330),
|
|
(5, 5, 3, -640),
|
|
(6, 6, 3, 640), (7, 7, 4, -640), (8, 8, 4, 640), (9, 9, 5, -1000),
|
|
(10, 10, 5, 1000),
|
|
(11, 11, 6, -660), (12, 12, 6, 660), (13, 13, 7, -650), (14, 14, 7, 650),
|
|
(15, 15, 8, -160),
|
|
(16, 16, 8, 160), (17, 17, 9, -740), (18, 18, 9, 740), (19, 19, 10, -310),
|
|
(20, 20, 10, 310),
|
|
(21, 21, 11, -640), (22, 22, 11, 640), (23, 23, 12, -240), (24, 24, 12, 240),
|
|
(25, 25, 13, -340),
|
|
(26, 26, 13, 340), (27, 27, 14, -720), (28, 28, 14, 720), (29, 29, 15, -100),
|
|
(30, 30, 15, 100),
|
|
(31, 31, 16, -980), (32, 32, 16, 980), (33, 33, 17, -80), (34, 34, 17, 80),
|
|
(35, 35, 18, -760),
|
|
(36, 36, 18, 760), (37, 37, 19, -740), (38, 38, 19, 740), (39, 39, 20, -990),
|
|
(40, 40, 20, 990);
|
|
ANALYZE TABLE ledgers, charges, transactions, transaction_items;
|
|
Table Op Msg_type Msg_text
|
|
test.ledgers analyze status Engine-independent statistics collected
|
|
test.ledgers analyze status OK
|
|
test.charges analyze status Engine-independent statistics collected
|
|
test.charges analyze status OK
|
|
test.transactions analyze status Engine-independent statistics collected
|
|
test.transactions analyze status OK
|
|
test.transaction_items analyze status Engine-independent statistics collected
|
|
test.transaction_items analyze status OK
|
|
set optimizer_switch='split_materialized=on';
|
|
SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
INNER JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id from_ledger_id to_ledger_id from_num_rows
|
|
2 1 2 1
|
|
3 1 2 1
|
|
5 3 2 1
|
|
8 3 2 1
|
|
10 3 2 1
|
|
12 3 2 1
|
|
13 3 2 1
|
|
18 1 2 1
|
|
EXPLAIN SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
INNER JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY charges ALL PRIMARY,fk_charge_from_ledger,fk_charge_to_ledger NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 17 test.charges.from_ledger_id,test.charges.id 2
|
|
2 LATERAL DERIVED transaction_items ref fk_items_transaction,fk_items_charge fk_items_charge 9 test.charges.id 2
|
|
2 LATERAL DERIVED transactions eq_ref PRIMARY,fk_transactions_ledger PRIMARY 8 test.transaction_items.transaction_id 1 Using where
|
|
EXPLAIN FORMAT=JSON SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
INNER JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "charges",
|
|
"access_type": "ALL",
|
|
"possible_keys": [
|
|
"PRIMARY",
|
|
"fk_charge_from_ledger",
|
|
"fk_charge_to_ledger"
|
|
],
|
|
"rows": 20,
|
|
"filtered": 40,
|
|
"attached_condition": "charges.to_ledger_id = 2"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "17",
|
|
"used_key_parts": ["ledger_id", "charge_id"],
|
|
"ref": ["test.charges.from_ledger_id", "test.charges.id"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "transaction_items",
|
|
"access_type": "ref",
|
|
"possible_keys": ["fk_items_transaction", "fk_items_charge"],
|
|
"key": "fk_items_charge",
|
|
"key_length": "9",
|
|
"used_key_parts": ["charge_id"],
|
|
"ref": ["test.charges.id"],
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "transactions",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["PRIMARY", "fk_transactions_ledger"],
|
|
"key": "PRIMARY",
|
|
"key_length": "8",
|
|
"used_key_parts": ["id"],
|
|
"ref": ["test.transaction_items.transaction_id"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "transactions.ledger_id = charges.from_ledger_id"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set optimizer_switch='split_materialized=off';
|
|
SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
INNER JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id from_ledger_id to_ledger_id from_num_rows
|
|
2 1 2 1
|
|
3 1 2 1
|
|
5 3 2 1
|
|
8 3 2 1
|
|
10 3 2 1
|
|
12 3 2 1
|
|
13 3 2 1
|
|
18 1 2 1
|
|
EXPLAIN SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
INNER JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY charges ALL PRIMARY,fk_charge_from_ledger,fk_charge_to_ledger NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 17 test.charges.from_ledger_id,test.charges.id 4
|
|
2 DERIVED transaction_items ALL fk_items_transaction NULL NULL NULL 40 Using temporary; Using filesort
|
|
2 DERIVED transactions eq_ref PRIMARY PRIMARY 8 test.transaction_items.transaction_id 1
|
|
INSERT INTO charges (id, from_ledger_id, to_ledger_id, amount) VALUES
|
|
(101, 4, 2, 100), (102, 7, 2, 200);
|
|
set optimizer_switch='split_materialized=on';
|
|
SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
LEFT JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id from_ledger_id to_ledger_id from_num_rows
|
|
2 1 2 1
|
|
3 1 2 1
|
|
5 3 2 1
|
|
8 3 2 1
|
|
10 3 2 1
|
|
12 3 2 1
|
|
13 3 2 1
|
|
18 1 2 1
|
|
101 4 2 NULL
|
|
102 7 2 NULL
|
|
EXPLAIN SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
LEFT JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY charges ALL fk_charge_to_ledger NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 18 test.charges.from_ledger_id,test.charges.id 2
|
|
2 LATERAL DERIVED transaction_items ref fk_items_transaction,fk_items_charge fk_items_charge 9 test.charges.id 2
|
|
2 LATERAL DERIVED transactions eq_ref PRIMARY,fk_transactions_ledger PRIMARY 8 test.transaction_items.transaction_id 1 Using where
|
|
EXPLAIN FORMAT=JSON SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
LEFT JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "charges",
|
|
"access_type": "ALL",
|
|
"possible_keys": ["fk_charge_to_ledger"],
|
|
"rows": 20,
|
|
"filtered": 50,
|
|
"attached_condition": "charges.to_ledger_id = 2"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "18",
|
|
"used_key_parts": ["ledger_id", "charge_id"],
|
|
"ref": ["test.charges.from_ledger_id", "test.charges.id"],
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "transaction_items",
|
|
"access_type": "ref",
|
|
"possible_keys": ["fk_items_transaction", "fk_items_charge"],
|
|
"key": "fk_items_charge",
|
|
"key_length": "9",
|
|
"used_key_parts": ["charge_id"],
|
|
"ref": ["test.charges.id"],
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "transactions",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": ["PRIMARY", "fk_transactions_ledger"],
|
|
"key": "PRIMARY",
|
|
"key_length": "8",
|
|
"used_key_parts": ["id"],
|
|
"ref": ["test.transaction_items.transaction_id"],
|
|
"rows": 1,
|
|
"filtered": 100,
|
|
"attached_condition": "transactions.ledger_id = charges.from_ledger_id"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
set optimizer_switch='split_materialized=off';
|
|
SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
LEFT JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id from_ledger_id to_ledger_id from_num_rows
|
|
2 1 2 1
|
|
3 1 2 1
|
|
5 3 2 1
|
|
8 3 2 1
|
|
10 3 2 1
|
|
12 3 2 1
|
|
13 3 2 1
|
|
18 1 2 1
|
|
101 4 2 NULL
|
|
102 7 2 NULL
|
|
EXPLAIN SELECT
|
|
charges.id,
|
|
charges.from_ledger_id,
|
|
charges.to_ledger_id,
|
|
from_agg_items.num_rows AS from_num_rows
|
|
FROM charges
|
|
LEFT JOIN (
|
|
SELECT
|
|
transactions.ledger_id,
|
|
transaction_items.charge_id,
|
|
count(*) as num_rows
|
|
FROM transaction_items
|
|
INNER JOIN transactions ON transaction_items.transaction_id = transactions.id
|
|
GROUP BY transactions.ledger_id, transaction_items.charge_id
|
|
) AS from_agg_items
|
|
ON from_agg_items.charge_id = charges.id AND
|
|
from_agg_items.ledger_id = charges.from_ledger_id
|
|
WHERE charges.to_ledger_id = 2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY charges ALL fk_charge_to_ledger NULL NULL NULL 20 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 18 test.charges.from_ledger_id,test.charges.id 4
|
|
2 DERIVED transaction_items ALL fk_items_transaction NULL NULL NULL 40 Using temporary; Using filesort
|
|
2 DERIVED transactions eq_ref PRIMARY PRIMARY 8 test.transaction_items.transaction_id 1
|
|
set optimizer_switch='split_materialized=default';
|
|
DROP TABLE transaction_items;
|
|
DROP TABLE transactions;
|
|
DROP TABLE charges;
|
|
DROP TABLE ledgers;
|
|
#
|
|
# MDEV-30081: Splitting from a constant mergeable derived table
|
|
# used in inner part of an outer join.
|
|
#
|
|
CREATE TABLE t1 ( id int PRIMARY KEY ) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (3),(4),(7);
|
|
CREATE TABLE t2 (
|
|
id int, id1 int, wid int, PRIMARY KEY (id), KEY (id1), KEY (wid)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (4,4,6),(7,7,7);
|
|
CREATE TABLE t3 (
|
|
wid int, wtid int, otid int, oid int,
|
|
PRIMARY KEY (wid), KEY (wtid), KEY (otid), KEY (oid)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t3 VALUES (6,30,6,6),(7,17,7,7);
|
|
CREATE TABLE t4 ( id int, a int, PRIMARY KEY (id), KEY (a) ) ENGINE=MyISAM;
|
|
INSERT INTO t4 VALUES (1,17),(2,15),(3,49),(4,3),(5,45),(6,38),(7,17);
|
|
CREATE TABLE t5 (
|
|
id int, id1 int, PRIMARY KEY (id), KEY id1 (id1)
|
|
) ENGINE=MyISAM ;
|
|
INSERT INTO t5 VALUES (1,17),(2,15),(3,49),(4,3),(5,45),(6,38),(7,17);
|
|
ANALYZE TABLE t1,t2,t3,t4,t5;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
test.t4 analyze status Engine-independent statistics collected
|
|
test.t4 analyze status OK
|
|
test.t5 analyze status Engine-independent statistics collected
|
|
test.t5 analyze status OK
|
|
CREATE VIEW v1 AS (SELECT id1 FROM t5 GROUP BY id1);
|
|
SELECT t3.*, t1.id AS t1_id, t2.id AS t2_id, dt.*, v1.*
|
|
FROM
|
|
t1, t2, t3
|
|
LEFT JOIN
|
|
(SELECT t4.* FROM t4 WHERE t4.a=3) dt
|
|
ON t3.oid = dt.id AND t3.otid = 14
|
|
LEFT JOIN v1
|
|
ON (v1.id1 = dt.a)
|
|
WHERE t3.oid = t1.id AND t3.oid = t2.id AND t3.wid = 7;
|
|
wid wtid otid oid t1_id t2_id id a id1
|
|
7 17 7 7 7 7 NULL NULL NULL
|
|
EXPLAIN SELECT t3.*, t1.id AS t1_id, t2.id AS t2_id, dt.*, v1.*
|
|
FROM
|
|
t1, t2, t3
|
|
LEFT JOIN
|
|
(SELECT t4.* FROM t4 WHERE t4.a=3) dt
|
|
ON t3.oid = dt.id AND t3.otid = 14
|
|
LEFT JOIN v1
|
|
ON (v1.id1 = dt.a)
|
|
WHERE t3.oid = t1.id AND t3.oid = t2.id AND t3.wid = 7;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 const PRIMARY,oid PRIMARY 4 const 1
|
|
1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY t2 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY t4 const PRIMARY,a NULL NULL NULL 1 Impossible ON condition
|
|
1 PRIMARY <derived3> ref key0 key0 5 const 0 Using where
|
|
3 LATERAL DERIVED t5 ref id1 id1 5 const 0 Using index
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2,t3,t4,t5;
|
|
# End of 10.3 tests
|
|
#
|
|
# MDEV-18679: materialized view with SELECT S containing materialized
|
|
# derived when impossible WHERE has been detected for S
|
|
#
|
|
create table t1 (pk int, f varchar(1));
|
|
insert into t1 values
|
|
(3,'y'), (1,'x'), (7,'z');
|
|
create view v1 as
|
|
select t1.f
|
|
from t1, (select distinct * from t1) t
|
|
where t.f = t1.f and 1 = 0
|
|
group by t1.f;
|
|
select * from v1;
|
|
f
|
|
explain select * from v1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> system NULL NULL NULL NULL 0 Const row not found
|
|
2 DERIVED NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 3 Using temporary
|
|
drop view v1;
|
|
drop table t1;
|
|
#
|
|
# MDEV-31102: execution of PS for query where pushdown of condition
|
|
# into view defined as union is applied
|
|
#
|
|
create table t1 (
|
|
n int,
|
|
lv varchar(31) charset latin1,
|
|
mv varchar(31) charset utf8mb3
|
|
) engine=myisam;
|
|
insert into t1 values (1,'aa','xxx'), ('2','bb','yyy'), (3,'cc','zzz');
|
|
create view v1 as
|
|
select case when n=1 then lv when n=2 then mv else NULL end as r from t1
|
|
union
|
|
select 'a';
|
|
select * from v1 where r < 'x';
|
|
r
|
|
aa
|
|
a
|
|
explain extended select * from v1 where r < 'x';
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `v1`.`r` AS `r` from `test`.`v1` where `v1`.`r` < 'x'
|
|
explain format=json select * from v1 where r < 'x';
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "v1.r < 'x'",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 3,
|
|
"filtered": 100,
|
|
"attached_condition": "case when t1.n = 1 then convert(t1.lv using utf8mb3) when t1.n = 2 then t1.mv else NULL end < 'x'"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"message": "No tables used"
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
prepare stmt from "select * from v1 where r < 'x'";
|
|
execute stmt;
|
|
r
|
|
aa
|
|
a
|
|
execute stmt;
|
|
r
|
|
aa
|
|
a
|
|
deallocate prepare stmt;
|
|
drop view v1;
|
|
drop table t1;
|
|
#
|
|
# MDEV-31240: condition pushed into splittable derived has reference to
|
|
# outer column and does not refer to any column of embedding
|
|
# select
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 select seq from seq_1_to_1000;
|
|
create table t2 (a int, b int, key (a));
|
|
insert into t2 select mod(seq,100), rand(13) * mod(seq,500) from seq_1_to_1000;
|
|
create table t3 (a int);
|
|
insert into t3 values (3), (1);
|
|
analyze table t1, t2, t3 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status Table is already up to date
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
explain select
|
|
a,
|
|
( select concat(t3.a,'=',dt.s)
|
|
from
|
|
(select a, sum(b) as s from t2 group by a) as dt,
|
|
t3
|
|
where dt.a=t1.a and t3.a < 3
|
|
) as SUBQ
|
|
from t1 limit 5;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 1000
|
|
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where
|
|
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 5 test.t1.a 2
|
|
3 LATERAL DERIVED t2 ref a a 5 test.t1.a 10
|
|
select
|
|
a,
|
|
( select concat(t3.a,'=',dt.s)
|
|
from
|
|
(select a, sum(b) as s from t2 group by a) as dt,
|
|
t3
|
|
where dt.a=t1.a and t3.a < 3
|
|
) as SUBQ
|
|
from t1 limit 5;
|
|
a SUBQ
|
|
1 1=804
|
|
2 1=1056
|
|
3 1=846
|
|
4 1=947
|
|
5 1=973
|
|
truncate table t2;
|
|
insert into t2 select mod(seq,10), rand(15) * mod(seq,500) from seq_1_to_1000;
|
|
analyze table t2 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status Table is already up to date
|
|
explain select
|
|
a,
|
|
( select concat(t3.a,'=',dt.s)
|
|
from
|
|
(select a, sum(b) as s from t2 group by a) as dt,
|
|
t3
|
|
where dt.a=t1.a and t3.a < 3
|
|
) as SUBQ
|
|
from t1 limit 5;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 1000
|
|
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where
|
|
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 5 test.t1.a 100
|
|
3 DERIVED t2 ALL a NULL NULL NULL 1000 Using temporary; Using filesort
|
|
select
|
|
a,
|
|
( select concat(t3.a,'=',dt.s)
|
|
from
|
|
(select a, sum(b) as s from t2 group by a) as dt,
|
|
t3
|
|
where dt.a=t1.a and t3.a < 3
|
|
) as SUBQ
|
|
from t1 limit 5;
|
|
a SUBQ
|
|
1 1=11858
|
|
2 1=11380
|
|
3 1=11588
|
|
4 1=11373
|
|
5 1=11612
|
|
drop table t1,t2,t3;
|
|
#
|
|
# MDEV-32064: usage of splittable derived table in query
|
|
# with IN subquery in WHERE
|
|
#
|
|
CREATE TABLE t1 (
|
|
id int unsigned NOT NULL,
|
|
valint1 int unsigned,
|
|
valdouble double,
|
|
valdate datetime,
|
|
PRIMARY KEY (id),
|
|
KEY (valint1),
|
|
KEY (valint1,valdate)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
(1,3289763,1,'2021-02-09 18:31:35'),(2,3289750,1,'2021-02-09 18:31:35'),
|
|
(3,3289780,1173,'2021-02-09 18:31:35'),(4,3289762,2,'2021-02-09 18:31:36'),
|
|
(5,3289774,2334,'2021-02-09 18:31:36'),(6,3289739,1934,'2021-02-09 18:31:36'),
|
|
(7,3289761,1,'2021-02-09 18:31:37'),(8,3289763,1,'2021-02-10 11:05:19'),
|
|
(9,3289750,1,'2021-02-10 11:05:19'),(10,3289780,0,'2021-02-10 11:05:35'),
|
|
(11,3289762,2,'2021-02-10 11:05:47'),(12,3289774,429,'2021-02-10 11:05:47'),
|
|
(13,3289739,1958,'2021-02-10 11:06:00'),(14,3289761,1,'2021-02-10 11:06:08'),
|
|
(15,3289957,0,'2021-02-10 13:04:44'),(16,3289988,1993,'2021-02-10 13:04:45'),
|
|
(17,3289951,1896,'2021-02-10 13:04:59'),(18,3289957,1994,'2021-02-10 13:07:40'),
|
|
(19,3289988,5,'2021-02-10 13:07:40'),(20,3289951,1897,'2021-02-10 13:07:40'),
|
|
(21,3289594,0,'2021-02-11 14:19:38'),(22,3289642,0,'2021-02-11 14:19:38'),
|
|
(23,3289626,2150,'2021-02-11 14:19:38'),(24,3289562,0,'2021-02-11 14:19:39'),
|
|
(25,3289593,1046,'2021-02-11 14:19:39'),(26,3289496,1,'2021-02-11 14:19:45'),
|
|
(27,3289475,1074,'2021-02-11 14:19:50'),(28,3289658,1155,'2021-02-11 14:19:56'),
|
|
(29,3289595,0,'2021-02-11 14:20:01'),(30,3290334,903,'2021-02-11 16:22:44'),
|
|
(31,3290284,479,'2021-02-11 16:23:00'),(32,3290327,236,'2021-02-11 16:23:00'),
|
|
(33,3290854,0,'2021-02-15 17:29:59'),(34,3290824,0,'2021-02-15 17:30:13'),
|
|
(35,3290875,0,'2021-02-15 17:30:14'),(36,3290897,2,'2021-02-15 17:30:19'),
|
|
(37,3290800,0,'2021-02-15 17:30:24'),(38,3290822,0,'2021-02-15 17:30:25'),
|
|
(39,3290901,2667,'2021-02-15 17:30:30'),(40,3290835,0,'2021-02-15 17:30:36'),
|
|
(41,3290875,0,'2021-02-15 17:35:33'),(42,3290824,1330,'2021-02-15 17:35:39'),
|
|
(43,3290854,769,'2021-02-15 17:35:44'),(44,3290897,2,'2021-02-15 17:35:50'),
|
|
(45,3290822,748,'2021-02-15 17:35:50'),(46,3290800,1007,'2021-02-15 17:35:56'),
|
|
(47,3290901,7018,'2021-02-15 17:35:56'),(48,3290835,779,'2021-02-15 17:36:17'),
|
|
(49,3290824,1329,'2021-02-15 17:40:30'),(50,3290875,764,'2021-02-15 17:40:31'),
|
|
(51,3290854,763,'2021-02-15 17:40:36'),(52,3290897,2347,'2021-02-15 17:40:47'),
|
|
(53,3290822,1,'2021-02-15 17:41:01'),(54,3290800,1018,'2021-02-15 17:41:07'),
|
|
(55,3290901,3936,'2021-02-15 17:41:08'),(56,3290835,784,'2021-02-15 17:41:24'),
|
|
(57,3290824,1313,'2021-02-15 17:44:47'),(58,3290875,758,'2021-02-15 17:44:48'),
|
|
(59,3290854,767,'2021-02-15 17:44:48'),(60,3290897,2438,'2021-02-15 17:44:48'),
|
|
(61,3290822,738,'2021-02-15 17:44:49'),(62,3290800,1003,'2021-02-15 17:44:54'),
|
|
(63,3290901,4686,'2021-02-15 17:44:55'),(64,3290835,778,'2021-02-15 17:45:13'),
|
|
(65,3290824,1303,'2021-02-15 17:51:16'),(66,3290875,753,'2021-02-15 17:51:16'),
|
|
(67,3290854,766,'2021-02-15 17:51:22'),(68,3290897,1,'2021-02-15 17:51:22'),
|
|
(69,3290822,743,'2021-02-15 17:51:28'),(70,3290901,5718,'2021-02-15 17:51:33'),
|
|
(71,3290800,1018,'2021-02-15 17:51:34'),(72,3290835,785,'2021-02-15 17:51:48'),
|
|
(73,3290824,1310,'2021-02-15 18:21:30'),(74,3290875,754,'2021-02-15 18:21:30'),
|
|
(75,3290854,782,'2021-02-15 18:21:36'),(76,3290897,2,'2021-02-15 18:21:36'),
|
|
(77,3290822,745,'2021-02-15 18:21:53'),(78,3290800,1011,'2021-02-15 18:21:54'),
|
|
(79,3290901,8998,'2021-02-15 18:21:54'),(80,3290835,0,'2021-02-15 18:22:00'),
|
|
(81,3290936,0,'2021-02-15 18:25:28'),(82,3290895,0,'2021-02-15 18:25:28'),
|
|
(83,3290832,0,'2021-02-15 18:25:28'),(84,3290878,796,'2021-02-15 18:25:52'),
|
|
(85,3290900,730,'2021-02-15 18:25:52'),(86,3290856,0,'2021-02-15 18:26:11'),
|
|
(87,3290904,816,'2021-02-15 18:26:17'),(88,3290882,0,'2021-02-15 18:26:25'),
|
|
(89,3290883,1031,'2021-02-15 18:27:16'),(90,3290918,1749,'2021-02-15 18:27:17'),
|
|
(91,3290831,0,'2021-02-15 18:59:11'),(92,3290884,477,'2021-02-15 18:59:12'),
|
|
(93,3290899,483,'2021-02-15 18:59:12'),(94,3290848,486,'2021-02-15 18:59:35'),
|
|
(95,3290880,487,'2021-02-15 18:59:35'),(96,3290798,0,'2021-02-15 18:59:52'),
|
|
(97,3290777,983,'2021-02-15 19:00:10'),(98,3290811,488,'2021-02-15 19:00:10'),
|
|
(99,3290917,1283,'2021-02-15 19:00:36'),(100,3290858,482,'2021-02-15 19:00:42');
|
|
CREATE TABLE t2 (a int) ENGINE=MYISAM;
|
|
INSERT INTO t2 VALUES
|
|
(3289475),(3289496),(3289562),(3289593),(3289594),(3289595),(3289626),
|
|
(3289642),(3289658),(3289739),(3289750),(3289761),(3289762),(3289763),
|
|
(3289774),(3289780),(3289951),(3289957),(3289988),(3290034),(1231562);
|
|
ANALYZE TABLE t1,t2;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
EXPLAIN SELECT t1.valdouble, t1.valint1
|
|
FROM t1,
|
|
(SELECT max(t.valdate) AS maxdate, t.valint1 FROM t1 t GROUP BY t.valint1)
|
|
AS dt
|
|
WHERE t1.valint1 = dt.valint1 AND
|
|
t1.valdate = dt.maxdate AND
|
|
t1.valint1 IN (SELECT * FROM t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <subquery3> ALL distinct_key NULL NULL NULL 21
|
|
1 PRIMARY t1 ref valint1,valint1_2 valint1 5 test.t2.a 2 Using index condition; Using where
|
|
1 PRIMARY <derived2> ref key0 key0 11 test.t1.valdate,test.t1.valint1 5
|
|
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 21 Using where
|
|
2 DERIVED t range valint1,valint1_2 valint1_2 5 NULL 51 Using index for group-by; Using temporary; Using filesort
|
|
SELECT t1.valdouble, t1.valint1
|
|
FROM t1,
|
|
(SELECT max(t.valdate) AS maxdate, t.valint1 FROM t1 t GROUP BY t.valint1)
|
|
AS dt
|
|
WHERE t1.valint1 = dt.valint1 AND
|
|
t1.valdate = dt.maxdate AND
|
|
t1.valint1 IN (SELECT * FROM t2);
|
|
valdouble valint1
|
|
1074 3289475
|
|
1 3289496
|
|
0 3289562
|
|
1046 3289593
|
|
0 3289594
|
|
0 3289595
|
|
2150 3289626
|
|
0 3289642
|
|
1155 3289658
|
|
1958 3289739
|
|
1 3289750
|
|
1 3289761
|
|
2 3289762
|
|
1 3289763
|
|
429 3289774
|
|
0 3289780
|
|
1897 3289951
|
|
1994 3289957
|
|
5 3289988
|
|
DROP TABLE t1,t2;
|
|
# End of 10.4 tests
|
|
# MDEV-34506 2nd execution name resolution problem with pushdown into
|
|
# unions
|
|
#
|
|
# Statements affected by this bug need all the following to be true
|
|
# 1) a derived table table or view whose specification contains a set
|
|
# operation at the top level.
|
|
# 2) a grouping operator (group by/having) operating on a column alias
|
|
# other than in the first select of the union/intersect
|
|
# 3) an outer condition that will be pushed into all selects in this
|
|
# union/intersect, either into the where or having clause
|
|
#
|
|
# When pushing a condition into all selects of a unit with more than one
|
|
# select, pushdown_cond_for_derived() renames items so we can re-use the
|
|
# condition being pushed.
|
|
# These names need to be saved and reset for correct name resolution on
|
|
# second execution of prepared statements.
|
|
create table t1 (c1 int, c2 int, c3 int);
|
|
insert into t1 values (1,2,3),(1,2,2),(4,5,6);
|
|
insert into t1 values (17,8,9),(11,11,12);
|
|
create table t2 (c4 int, c5 int, c6 int);
|
|
insert into t2 values (7,8,9),(10,11,12);
|
|
prepare stmt from 'select * from
|
|
(
|
|
select c1, sum(c3) as s from t1 group by c1
|
|
union
|
|
select c4 as c, sum(c6) as u from t2 group by c
|
|
) dt
|
|
where c1 > 6';
|
|
execute stmt;
|
|
c1 s
|
|
11 12
|
|
17 9
|
|
7 9
|
|
10 12
|
|
execute stmt;
|
|
c1 s
|
|
11 12
|
|
17 9
|
|
7 9
|
|
10 12
|
|
prepare stmt from 'explain format=json select * from
|
|
(
|
|
select c1, sum(c3) as s from t1 group by c1
|
|
union
|
|
select c4 as c, sum(c6) as u from t2 group by c
|
|
) dt
|
|
where c1 > 6';
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.c1 > 6",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.c1",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c1 > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"filesort": {
|
|
"sort_key": "t2.c4",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c4 > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.c1 > 6",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"filesort": {
|
|
"sort_key": "t1.c1",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c1 > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"filesort": {
|
|
"sort_key": "t2.c4",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c4 > 6"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
prepare stmt from 'select * from
|
|
(
|
|
select c1, c2, sum(c3) as s from t1 group by c1, c2 having s > 2
|
|
union
|
|
select c4, c5, sum(c6) as u from t2 group by c4, c5 having u > 3
|
|
) dt
|
|
where c2 > 5';
|
|
execute stmt;
|
|
c1 c2 s
|
|
11 11 12
|
|
17 8 9
|
|
7 8 9
|
|
10 11 12
|
|
execute stmt;
|
|
c1 c2 s
|
|
11 11 12
|
|
17 8 9
|
|
7 8 9
|
|
10 11 12
|
|
prepare stmt from 'explain format=json select * from
|
|
(
|
|
select c1, c2, sum(c3) as s from t1 group by c1, c2 having s > 2
|
|
union
|
|
select c4, c5, sum(c6) as u from t2 group by c4, c5 having u > 3
|
|
) dt
|
|
where c2 > 5';
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.c2 > 5",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "s > 2",
|
|
"filesort": {
|
|
"sort_key": "t1.c1, t1.c2",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c2 > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "s > 3",
|
|
"filesort": {
|
|
"sort_key": "t2.c4, t2.c5",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c5 > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.c2 > 5",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "s > 2",
|
|
"filesort": {
|
|
"sort_key": "t1.c1, t1.c2",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.c2 > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "s > 3",
|
|
"filesort": {
|
|
"sort_key": "t2.c4, t2.c5",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100,
|
|
"attached_condition": "t2.c5 > 5"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
prepare stmt from 'select *
|
|
from
|
|
(
|
|
select c1, c2, max(c3) as max_c, avg(c3) as avg_c
|
|
from t1
|
|
group by c1,c2
|
|
having max_c < 7
|
|
union
|
|
select c4, c5, max(c6) as u, avg(c6) as w
|
|
from t2
|
|
group by c4, c5
|
|
having u < 10
|
|
) dt,
|
|
t2
|
|
where dt.max_c > 6 and t2.c6 > dt.c1';
|
|
execute stmt;
|
|
c1 c2 max_c avg_c c4 c5 c6
|
|
7 8 9 9.0000 7 8 9
|
|
7 8 9 9.0000 10 11 12
|
|
execute stmt;
|
|
c1 c2 max_c avg_c c4 c5 c6
|
|
7 8 9 9.0000 7 8 9
|
|
7 8 9 9.0000 10 11 12
|
|
prepare stmt from 'explain format=json select *
|
|
from
|
|
(
|
|
select c1, c2, max(c3) as max_c, avg(c3) as avg_c
|
|
from t1
|
|
group by c1,c2
|
|
having max_c < 7
|
|
union
|
|
select c4, c5, max(c6) as u, avg(c6) as w
|
|
from t2
|
|
group by c4, c5
|
|
having u < 10
|
|
) dt,
|
|
t2
|
|
where dt.max_c > 6 and t2.c6 > dt.c1';
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.max_c > 6"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.c6 > dt.c1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 7 and max_c > 6",
|
|
"filesort": {
|
|
"sort_key": "t1.c1, t1.c2",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "max_c < 10 and max_c > 6",
|
|
"filesort": {
|
|
"sort_key": "t2.c4, t2.c5",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
execute stmt;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 7,
|
|
"filtered": 100,
|
|
"attached_condition": "dt.max_c > 6"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "173",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.c6 > dt.c1",
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<union2,3>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"having_condition": "max_c < 7 and max_c > 6",
|
|
"filesort": {
|
|
"sort_key": "t1.c1, t1.c2",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "UNION",
|
|
"having_condition": "max_c < 10 and max_c > 6",
|
|
"filesort": {
|
|
"sort_key": "t2.c4, t2.c5",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 2,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop table t1, t2;
|
|
#
|
|
# MDEV-35276: Assertion failure in find_producing_item upon a query
|
|
# from a view
|
|
#
|
|
# Note: for all followng queries with DEFAULT(f) hishdown is
|
|
# prohibited
|
|
CREATE VIEW v AS select 0 AS f;
|
|
SELECT * FROM v WHERE f = DEFAULT(f);
|
|
f
|
|
0
|
|
CREATE TABLE t1 (c int DEFAULT 0);
|
|
insert into t1 values (0), (1);
|
|
SELECT * FROM v,t1 WHERE f = DEFAULT(c);
|
|
f c
|
|
0 0
|
|
0 1
|
|
ALTER TABLE t1 ALTER c SET DEFAULT 1;
|
|
SELECT * FROM v,t1 WHERE f = DEFAULT(c);
|
|
f c
|
|
drop table t1;
|
|
create table t1 (a int, c int DEFAULT a);
|
|
insert into t1 values (0, -1), (1, -2);
|
|
SELECT * FROM v,t1 WHERE f = DEFAULT(c);
|
|
f a c
|
|
0 0 -1
|
|
DROP VIEW v;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-32395: update_depend_map_for_order: SEGV at
|
|
# /mariadb-11.3.0/sql/sql_select.cc:16583
|
|
#
|
|
create table t1 (c1 int);
|
|
insert into t1 values (1), (2);
|
|
create table t2 (c2 int);
|
|
insert into t2 values (1), (2);
|
|
create table t3 (c3 int);
|
|
insert into t3 values (1), (2);
|
|
set statement optimizer_switch='condition_pushdown_for_derived=off,condition_pushdown_for_subquery=off,condition_pushdown_from_having=off' for
|
|
select t1.c1 as a from t2, t1 where t1.c1=t2.c2
|
|
order by (select c3 from t3 group by a having a=2);
|
|
a
|
|
1
|
|
2
|
|
drop table t1, t2, t3;
|
|
# Test case 2
|
|
CREATE TABLE t1 ( x BOOLEAN NOT NULL );
|
|
INSERT INTO t1 ( x ) VALUES ( 1 ) ;
|
|
UPDATE t1 SET x = 1 WHERE x = 1 ;
|
|
INSERT INTO t1 ( x ) VALUES ( 1 ) , ( x IN ( SELECT x FROM ( SELECT ( SELECT EXISTS ( SELECT * FROM ( SELECT DISTINCT ( - CASE WHEN x = 1 THEN 1 ELSE x + 1 END >= x IS NOT NULL = 1 AND x = 1 ) OR x = x OR x = 'x' FROM t1 AS x GROUP BY x ) AS x WHERE 1 / x GROUP BY x HAVING ( 1 = 1 AND x = 1 ) ) FROM t1 GROUP BY EXISTS ( SELECT 1 ) ) FROM t1 UNION SELECT x FROM t1 ) AS x ) ) ;
|
|
DROP TABLE t1;
|
|
# Test case 3
|
|
CREATE TABLE t0 ( c6 INT , c21 INT ) ;
|
|
INSERT INTO t0 VALUES ( 55 , -95 ) , ( 9 , 90 ) ;
|
|
ALTER TABLE t0 ADD COLUMN c37 INT AFTER c6 ;
|
|
INSERT INTO t0 VALUES ( ) , ( ) ;
|
|
SELECT t0 . c6 AS c42 FROM ( SELECT t0 . c6 = TRIM( TRAILING FROM 96 ) SOUNDS LIKE CONVERT ( t0 . c6 , UNSIGNED ) >> PI ( ) AS c49 FROM t0 ) AS t1 JOIN t0 ON RTRIM ( - RAND ( -66 ) BETWEEN FIND_IN_SET ( 20 , UNHEX ( -80 ) IS NULL OR IF ( 85 , -83 , -113 ) ) AND -125 ) / EXP ( c21 ) = t1 . c49 ORDER BY c42 , ( c42 + ( SELECT c21 AS c61 FROM t0 WHERE t0 . c37 >= -19.601384 = RAND ( ) / TRIM( t0 . c21 FROM 'C@rG3D(#9*17(a.,rV' ) = -106 GROUP BY c21 , c42 HAVING c42 = -73 LIMIT 1 ) ) ;
|
|
c42
|
|
9
|
|
9
|
|
55
|
|
55
|
|
drop table t0;
|
|
#
|
|
# MDEV-32329 pushdown from having into where: Server crashes at sub_select
|
|
#
|
|
WITH RECURSIVE cte AS ( SELECT 1 as x UNION SELECT x FROM cte)
|
|
SELECT ( SELECT 1 FROM ( SELECT 1 FROM cte) dt GROUP BY x HAVING x= 1 )
|
|
FROM cte
|
|
GROUP BY 1 ;
|
|
( SELECT 1 FROM ( SELECT 1 FROM cte) dt GROUP BY x HAVING x= 1 )
|
|
1
|
|
# Test case 2
|
|
WITH
|
|
cte1 AS ( SELECT 1 as x UNION SELECT 1),
|
|
cte2 AS ( SELECT 1 as x UNION SELECT 1)
|
|
SELECT
|
|
( SELECT 1 FROM ( SELECT 1 FROM cte1) dt GROUP BY x HAVING x= 1 )
|
|
FROM cte2
|
|
GROUP BY 1 ;
|
|
( SELECT 1 FROM ( SELECT 1 FROM cte1) dt GROUP BY x HAVING x= 1 )
|
|
1
|
|
# End of 10.5 tests
|
|
#
|
|
# MDEV-28958: condition pushable into view after simplification
|
|
# contains constant TRUE/FALSE as subformula
|
|
#
|
|
create table t1 (c1 int);
|
|
insert into t1 values (3), (7), (1), (3), (1), (3);
|
|
create table t2 (c2 int);
|
|
insert into t2 values (3), (5), (7), (3);
|
|
create view v1 as select * from t1 group by c1;
|
|
create view v2 as select c1 as a, c2 as b from v1,t2 where c1=c2;
|
|
select * from v2 group by a,b having a=b or b > a+10;
|
|
a b
|
|
3 3
|
|
7 7
|
|
drop view v1,v2;
|
|
drop table t1,t2;
|
|
# End of 10.7 tests
|