mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 20:12:31 +01:00
724 lines
21 KiB
Text
724 lines
21 KiB
Text
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set join_cache_level=6;
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show variables like 'join_cache_level';
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Variable_name Value
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join_cache_level 6
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drop table if exists t0, t1, t2, t3;
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drop view if exists v1;
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (
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a int,
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b int
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);
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insert into t1 values (1,1),(1,1),(2,2);
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create table t2 (
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a int,
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b int,
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key(b)
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);
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insert into t2 select a, a/2 from t0;
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select * from t1;
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a b
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1 1
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1 1
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2 2
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select * from t2;
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a b
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0 0
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1 1
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2 1
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3 2
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4 2
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5 3
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6 3
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7 4
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8 4
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9 5
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explain select * from t2 where b in (select a from t1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Materialize; Scan
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1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer
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select * from t2 where b in (select a from t1);
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a b
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1 1
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2 1
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3 2
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4 2
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create table t3 (
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a int,
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b int,
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key(b),
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pk1 char(200), pk2 char(200), pk3 char(200),
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primary key(pk1, pk2, pk3)
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) engine=innodb;
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insert into t3 select a,a, a,a,a from t0;
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explain select * from t3 where b in (select a from t1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL b NULL NULL NULL 10
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3); Using join buffer
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select * from t3 where b in (select a from t1);
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a b pk1 pk2 pk3
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1 1 1 1 1
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2 2 2 2 2
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set @save_max_heap_table_size= @@max_heap_table_size;
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set max_heap_table_size=16384;
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set @save_join_buffer_size = @@join_buffer_size;
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set join_buffer_size= 8000;
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drop table t3;
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create table t3 (
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a int,
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b int,
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key(b),
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pk1 char(200), pk2 char(200),
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primary key(pk1, pk2)
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) engine=innodb;
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insert into t3 select
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A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
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from t0 A, t0 B where B.a <5;
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explain select * from t3 where b in (select a from t0);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where; Materialize; Scan
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1 PRIMARY t3 ref b b 5 test.t0.a 1
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set @save_ecp= @@engine_condition_pushdown;
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set engine_condition_pushdown=0;
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select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5);
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a b pk1 pk2
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0 0 0 0
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1 1 1 1
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2 2 2 2
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3 3 3 3
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4 4 4 4
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5 5 5 5
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6 6 6 6
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7 7 7 7
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8 8 8 8
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9 9 9 9
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10 10 10 10
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11 11 11 11
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12 12 12 12
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13 13 13 13
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set engine_condition_pushdown=@save_ecp;
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set join_buffer_size= @save_join_buffer_size;
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set max_heap_table_size= @save_max_heap_table_size;
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explain select * from t1 where a in (select b from t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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1 PRIMARY t2 index b b 5 NULL 10 Using index; Materialize
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select * from t1;
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a b
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1 1
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1 1
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2 2
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select * from t1 where a in (select b from t2);
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a b
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1 1
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1 1
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2 2
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drop table t1, t2, t3;
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set @save_join_buffer_size = @@join_buffer_size;
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set join_buffer_size= 8000;
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create table t1 (a int, filler1 binary(200), filler2 binary(200));
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insert into t1 select a, 'filler123456', 'filler123456' from t0;
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insert into t1 select a+10, 'filler123456', 'filler123456' from t0;
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create table t2 as select * from t1;
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insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
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insert into t1 values (2, 'duplicate ok', 'duplicate ok');
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insert into t1 values (18, 'duplicate ok', 'duplicate ok');
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insert into t2 values (3, 'duplicate ok', 'duplicate ok');
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insert into t2 values (19, 'duplicate ok', 'duplicate ok');
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY it ALL NULL NULL NULL NULL 22 Materialize; Scan
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1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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a mid(filler1, 1,10) Z
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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3 filler1234 1
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
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7 filler1234 1
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8 filler1234 1
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9 filler1234 1
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10 filler1234 1
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11 filler1234 1
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12 filler1234 1
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13 filler1234 1
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14 filler1234 1
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15 filler1234 1
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16 filler1234 1
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17 filler1234 1
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18 filler1234 1
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19 filler1234 1
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2 duplicate 1
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18 duplicate 1
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
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from t2 ot where a in (select a from t1 it);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY ot ALL NULL NULL NULL NULL 22
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1 PRIMARY it ALL NULL NULL NULL NULL 32 Materialize
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
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from t2 ot where a in (select a from t1 it);
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a mid(filler1, 1,10) length(filler1)=length(filler2)
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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3 filler1234 1
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
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7 filler1234 1
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8 filler1234 1
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9 filler1234 1
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10 filler1234 1
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11 filler1234 1
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12 filler1234 1
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13 filler1234 1
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14 filler1234 1
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15 filler1234 1
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16 filler1234 1
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17 filler1234 1
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18 filler1234 1
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19 filler1234 1
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3 duplicate 1
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19 duplicate 1
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insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
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insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY it ALL NULL NULL NULL NULL 22 Materialize; Scan
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1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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a mid(filler1, 1,10) Z
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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|
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3 filler1234 1
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|
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
|
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|
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7 filler1234 1
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8 filler1234 1
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|
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9 filler1234 1
|
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|
|
10 filler1234 1
|
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|
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11 filler1234 1
|
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|
|
12 filler1234 1
|
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|
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13 filler1234 1
|
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|
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14 filler1234 1
|
||
|
|
15 filler1234 1
|
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|
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16 filler1234 1
|
||
|
|
17 filler1234 1
|
||
|
|
18 filler1234 1
|
||
|
|
19 filler1234 1
|
||
|
|
2 duplicate 1
|
||
|
|
18 duplicate 1
|
||
|
|
explain select
|
||
|
|
a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||
|
|
from t2 ot where a in (select a from t1 it);
|
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|
|
id select_type table type possible_keys key key_len ref rows Extra
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|
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1 PRIMARY ot ALL NULL NULL NULL NULL 22
|
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|
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1 PRIMARY it ALL NULL NULL NULL NULL 52 Materialize
|
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|
|
select
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|
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
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|
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from t2 ot where a in (select a from t1 it);
|
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|
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a mid(filler1, 1,10) length(filler1)=length(filler2)
|
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|
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0 filler1234 1
|
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|
|
1 filler1234 1
|
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|
|
2 filler1234 1
|
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|
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3 filler1234 1
|
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|
|
4 filler1234 1
|
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|
|
5 filler1234 1
|
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|
|
6 filler1234 1
|
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|
|
7 filler1234 1
|
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|
|
8 filler1234 1
|
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|
|
9 filler1234 1
|
||
|
|
10 filler1234 1
|
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|
|
11 filler1234 1
|
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|
|
12 filler1234 1
|
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|
|
13 filler1234 1
|
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|
|
14 filler1234 1
|
||
|
|
15 filler1234 1
|
||
|
|
16 filler1234 1
|
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|
|
17 filler1234 1
|
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|
|
18 filler1234 1
|
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19 filler1234 1
|
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3 duplicate 1
|
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19 duplicate 1
|
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drop table t1, t2;
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|
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create table t1 (a int, b int, key(a));
|
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|
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create table t2 (a int, b int, key(a));
|
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|
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create table t3 (a int, b int, key(a));
|
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|
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insert into t1 select a,a from t0;
|
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|
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insert into t2 select a,a from t0;
|
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|
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insert into t3 select a,a from t0;
|
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|
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t2 and t3 must be use 'ref', not 'ALL':
|
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|
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explain select *
|
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|
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from t0 where a in
|
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|
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(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
|
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|
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id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 10
|
||
|
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1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Start temporary; Using join buffer
|
||
|
|
1 PRIMARY t2 ref a a 5 test.t1.a 1 Using index
|
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|
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1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary
|
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drop table t0, t1,t2,t3;
|
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|
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CREATE TABLE t1 (
|
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|
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ID int(11) NOT NULL auto_increment,
|
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Name char(35) NOT NULL default '',
|
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Country char(3) NOT NULL default '',
|
||
|
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Population int(11) NOT NULL default '0',
|
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|
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PRIMARY KEY (ID),
|
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|
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INDEX (Population),
|
||
|
|
INDEX (Country)
|
||
|
|
);
|
||
|
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CREATE TABLE t2 (
|
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|
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Code char(3) NOT NULL default '',
|
||
|
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Name char(52) NOT NULL default '',
|
||
|
|
SurfaceArea float(10,2) NOT NULL default '0.00',
|
||
|
|
Population int(11) NOT NULL default '0',
|
||
|
|
Capital int(11) default NULL,
|
||
|
|
PRIMARY KEY (Code),
|
||
|
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UNIQUE INDEX (Name),
|
||
|
|
INDEX (Population)
|
||
|
|
);
|
||
|
|
CREATE TABLE t3 (
|
||
|
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Country char(3) NOT NULL default '',
|
||
|
|
Language char(30) NOT NULL default '',
|
||
|
|
Percentage float(3,1) NOT NULL default '0.0',
|
||
|
|
PRIMARY KEY (Country, Language),
|
||
|
|
INDEX (Percentage)
|
||
|
|
);
|
||
|
|
EXPLAIN
|
||
|
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SELECT Name FROM t2
|
||
|
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WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000)
|
||
|
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AND
|
||
|
|
t2.Code IN (SELECT Country FROM t3
|
||
|
|
WHERE Language='English' AND Percentage > 10 AND
|
||
|
|
t2.Population > 100000);
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Using MRR
|
||
|
|
1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where; Using join buffer
|
||
|
|
1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition(BKA); Using where; Using join buffer
|
||
|
|
DROP TABLE t1,t2,t3;
|
||
|
|
CREATE TABLE t1 (
|
||
|
|
Code char(3) NOT NULL DEFAULT '',
|
||
|
|
Name char(52) NOT NULL DEFAULT '',
|
||
|
|
Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL DEFAULT 'Asia',
|
||
|
|
Region char(26) NOT NULL DEFAULT '',
|
||
|
|
SurfaceArea float(10,2) NOT NULL DEFAULT '0.00',
|
||
|
|
IndepYear smallint(6) DEFAULT NULL,
|
||
|
|
Population int(11) NOT NULL DEFAULT '0',
|
||
|
|
LifeExpectancy float(3,1) DEFAULT NULL,
|
||
|
|
GNP float(10,2) DEFAULT NULL,
|
||
|
|
GNPOld float(10,2) DEFAULT NULL,
|
||
|
|
LocalName char(45) NOT NULL DEFAULT '',
|
||
|
|
GovernmentForm char(45) NOT NULL DEFAULT '',
|
||
|
|
HeadOfState char(60) DEFAULT NULL,
|
||
|
|
Capital int(11) DEFAULT NULL,
|
||
|
|
Code2 char(2) NOT NULL DEFAULT '',
|
||
|
|
PRIMARY KEY (Code)
|
||
|
|
);
|
||
|
|
CREATE TABLE t2 (
|
||
|
|
ID int(11) NOT NULL AUTO_INCREMENT,
|
||
|
|
Name char(35) NOT NULL DEFAULT '',
|
||
|
|
CountryCode char(3) NOT NULL DEFAULT '',
|
||
|
|
District char(20) NOT NULL DEFAULT '',
|
||
|
|
Population int(11) NOT NULL DEFAULT '0',
|
||
|
|
PRIMARY KEY (ID),
|
||
|
|
KEY CountryCode (CountryCode)
|
||
|
|
);
|
||
|
|
Fill the table with test data
|
||
|
|
This must not use LooseScan:
|
||
|
|
EXPLAIN SELECT Name FROM t1
|
||
|
|
WHERE t1.Code IN (
|
||
|
|
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
|
||
|
|
1 PRIMARY t2 ALL CountryCode NULL NULL NULL 545 Using where; Materialize
|
||
|
|
SELECT Name FROM t1
|
||
|
|
WHERE t1.Code IN (
|
||
|
|
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
|
||
|
|
Name
|
||
|
|
Austria
|
||
|
|
Canada
|
||
|
|
China
|
||
|
|
Czech Republic
|
||
|
|
drop table t1, t2;
|
||
|
|
CREATE TABLE t1(a INT);
|
||
|
|
CREATE TABLE t2(c INT);
|
||
|
|
CREATE PROCEDURE p1(v1 int)
|
||
|
|
BEGIN
|
||
|
|
SELECT 1 FROM t1 WHERE a = v1 AND a IN (SELECT c FROM t2);
|
||
|
|
END
|
||
|
|
//
|
||
|
|
CREATE PROCEDURE p2(v1 int)
|
||
|
|
BEGIN
|
||
|
|
SELECT 1 FROM t1 WHERE a IN (SELECT c FROM t2);
|
||
|
|
END
|
||
|
|
//
|
||
|
|
CREATE PROCEDURE p3(v1 int)
|
||
|
|
BEGIN
|
||
|
|
SELECT 1
|
||
|
|
FROM
|
||
|
|
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
|
||
|
|
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
|
||
|
|
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
|
||
|
|
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
|
||
|
|
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
|
||
|
|
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
|
||
|
|
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
|
||
|
|
t1 t57,t1 t58,t1 t59,t1 t60
|
||
|
|
WHERE t01.a IN (SELECT c FROM t2);
|
||
|
|
END
|
||
|
|
//
|
||
|
|
CREATE PROCEDURE p4(v1 int)
|
||
|
|
BEGIN
|
||
|
|
SELECT 1
|
||
|
|
FROM
|
||
|
|
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
|
||
|
|
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
|
||
|
|
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
|
||
|
|
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
|
||
|
|
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
|
||
|
|
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
|
||
|
|
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
|
||
|
|
t1 t57,t1 t58,t1 t59,t1 t60
|
||
|
|
WHERE t01.a = v1 AND t01.a IN (SELECT c FROM t2);
|
||
|
|
END
|
||
|
|
//
|
||
|
|
CALL p1(1);
|
||
|
|
1
|
||
|
|
CALL p2(1);
|
||
|
|
1
|
||
|
|
CALL p3(1);
|
||
|
|
1
|
||
|
|
CALL p4(1);
|
||
|
|
1
|
||
|
|
DROP TABLE t1, t2;
|
||
|
|
DROP PROCEDURE p1;
|
||
|
|
DROP PROCEDURE p2;
|
||
|
|
DROP PROCEDURE p3;
|
||
|
|
DROP PROCEDURE p4;
|
||
|
|
create table t0 (a int);
|
||
|
|
insert into t0 values (0),(1),(2),(3),(4);
|
||
|
|
create table t1 (a int, b int, key(a));
|
||
|
|
insert into t1 select a,a from t0;
|
||
|
|
create table t2 (a int, b int, primary key(a));
|
||
|
|
insert into t2 select * from t1;
|
||
|
|
Table t2, unlike table t1, should be displayed as pulled out
|
||
|
|
explain extended select * from t0
|
||
|
|
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
|
||
|
|
t1.b=t2.b);
|
||
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where
|
||
|
|
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Start temporary; Using join buffer
|
||
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary; Using join buffer
|
||
|
|
Warnings:
|
||
|
|
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1
|
||
|
|
Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`))
|
||
|
|
update t1 set a=3, b=11 where a=4;
|
||
|
|
update t2 set b=11 where a=3;
|
||
|
|
|
||
|
|
# The following query gives wrong result due to Bug#49129
|
||
|
|
select * from t0 where t0.a in
|
||
|
|
(select t1.a from t1, t2 where t2.a=t0.a and t1.b=t2.b);
|
||
|
|
a
|
||
|
|
0
|
||
|
|
drop table t0, t1, t2;
|
||
|
|
CREATE TABLE t1 (
|
||
|
|
id int(11) NOT NULL,
|
||
|
|
PRIMARY KEY (id));
|
||
|
|
CREATE TABLE t2 (
|
||
|
|
id int(11) NOT NULL,
|
||
|
|
fid int(11) NOT NULL,
|
||
|
|
PRIMARY KEY (id));
|
||
|
|
insert into t1 values(1);
|
||
|
|
insert into t2 values(1,7503),(2,1);
|
||
|
|
explain select count(*)
|
||
|
|
from t1
|
||
|
|
where fid IN (select fid from t2 where (id between 7502 and 8420) order by fid );
|
||
|
|
ERROR 42S22: Unknown column 'fid' in 'IN/ALL/ANY subquery'
|
||
|
|
drop table t1, t2;
|
||
|
|
create table t1 (a int, b int, key (a), key (b));
|
||
|
|
insert into t1 values (2,4),(2,4),(2,4);
|
||
|
|
select t1.a from t1
|
||
|
|
where
|
||
|
|
t1.a in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.a);
|
||
|
|
a
|
||
|
|
drop table t1;
|
||
|
|
create table t1(a int,b int,key(a),key(b));
|
||
|
|
insert into t1 values (1,1),(2,2),(3,3);
|
||
|
|
select 1 from t1
|
||
|
|
where t1.a not in (select 1 from t1
|
||
|
|
where t1.a in (select 1 from t1)
|
||
|
|
group by t1.b);
|
||
|
|
1
|
||
|
|
1
|
||
|
|
1
|
||
|
|
drop table t1;
|
||
|
|
CREATE TABLE t1
|
||
|
|
(EMPNUM CHAR(3) NOT NULL,
|
||
|
|
EMPNAME CHAR(20),
|
||
|
|
GRADE DECIMAL(4),
|
||
|
|
CITY CHAR(15));
|
||
|
|
CREATE TABLE t2
|
||
|
|
(PNUM CHAR(3) NOT NULL,
|
||
|
|
PNAME CHAR(20),
|
||
|
|
PTYPE CHAR(6),
|
||
|
|
BUDGET DECIMAL(9),
|
||
|
|
CITY CHAR(15));
|
||
|
|
CREATE TABLE t3
|
||
|
|
(EMPNUM CHAR(3) NOT NULL,
|
||
|
|
PNUM CHAR(3) NOT NULL,
|
||
|
|
HOURS DECIMAL(5));
|
||
|
|
INSERT INTO t1 VALUES ('E1','Alice',12,'Deale');
|
||
|
|
INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna');
|
||
|
|
INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna');
|
||
|
|
INSERT INTO t1 VALUES ('E4','Don',12,'Deale');
|
||
|
|
INSERT INTO t1 VALUES ('E5','Ed',13,'Akron');
|
||
|
|
INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale');
|
||
|
|
INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna');
|
||
|
|
INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa');
|
||
|
|
INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale');
|
||
|
|
INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna');
|
||
|
|
INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale');
|
||
|
|
INSERT INTO t3 VALUES ('E1','P1',40);
|
||
|
|
INSERT INTO t3 VALUES ('E1','P2',20);
|
||
|
|
INSERT INTO t3 VALUES ('E1','P3',80);
|
||
|
|
INSERT INTO t3 VALUES ('E1','P4',20);
|
||
|
|
INSERT INTO t3 VALUES ('E1','P5',12);
|
||
|
|
INSERT INTO t3 VALUES ('E1','P6',12);
|
||
|
|
INSERT INTO t3 VALUES ('E2','P1',40);
|
||
|
|
INSERT INTO t3 VALUES ('E2','P2',80);
|
||
|
|
INSERT INTO t3 VALUES ('E3','P2',20);
|
||
|
|
INSERT INTO t3 VALUES ('E4','P2',20);
|
||
|
|
INSERT INTO t3 VALUES ('E4','P4',40);
|
||
|
|
INSERT INTO t3 VALUES ('E4','P5',80);
|
||
|
|
SELECT * FROM t1;
|
||
|
|
EMPNUM EMPNAME GRADE CITY
|
||
|
|
E1 Alice 12 Deale
|
||
|
|
E2 Betty 10 Vienna
|
||
|
|
E3 Carmen 13 Vienna
|
||
|
|
E4 Don 12 Deale
|
||
|
|
E5 Ed 13 Akron
|
||
|
|
CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM);
|
||
|
|
SELECT EMPNAME
|
||
|
|
FROM t1
|
||
|
|
WHERE EMPNUM IN
|
||
|
|
(SELECT EMPNUM
|
||
|
|
FROM t3
|
||
|
|
WHERE PNUM IN
|
||
|
|
(SELECT PNUM
|
||
|
|
FROM t2
|
||
|
|
WHERE PTYPE = 'Design'));
|
||
|
|
EMPNAME
|
||
|
|
Alice
|
||
|
|
Betty
|
||
|
|
Don
|
||
|
|
DROP INDEX t1_IDX ON t1;
|
||
|
|
CREATE INDEX t1_IDX ON t1(EMPNUM);
|
||
|
|
SELECT EMPNAME
|
||
|
|
FROM t1
|
||
|
|
WHERE EMPNUM IN
|
||
|
|
(SELECT EMPNUM
|
||
|
|
FROM t3
|
||
|
|
WHERE PNUM IN
|
||
|
|
(SELECT PNUM
|
||
|
|
FROM t2
|
||
|
|
WHERE PTYPE = 'Design'));
|
||
|
|
EMPNAME
|
||
|
|
Alice
|
||
|
|
Betty
|
||
|
|
Don
|
||
|
|
DROP INDEX t1_IDX ON t1;
|
||
|
|
SELECT EMPNAME
|
||
|
|
FROM t1
|
||
|
|
WHERE EMPNUM IN
|
||
|
|
(SELECT EMPNUM
|
||
|
|
FROM t3
|
||
|
|
WHERE PNUM IN
|
||
|
|
(SELECT PNUM
|
||
|
|
FROM t2
|
||
|
|
WHERE PTYPE = 'Design'));
|
||
|
|
EMPNAME
|
||
|
|
Alice
|
||
|
|
Betty
|
||
|
|
Don
|
||
|
|
DROP TABLE t1, t2, t3;
|
||
|
|
CREATE TABLE t1 (f1 INT NOT NULL);
|
||
|
|
CREATE VIEW v1 (a) AS SELECT f1 IN (SELECT f1 FROM t1) FROM t1;
|
||
|
|
SELECT * FROM v1;
|
||
|
|
a
|
||
|
|
drop view v1;
|
||
|
|
drop table t1;
|
||
|
|
create table t0 (a int);
|
||
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
||
|
|
create table t1(a int, b int);
|
||
|
|
insert into t1 values (0,0),(1,1),(2,2);
|
||
|
|
create table t2 as select * from t1;
|
||
|
|
create table t3 (pk int, a int, primary key(pk));
|
||
|
|
insert into t3 select a,a from t0;
|
||
|
|
explain
|
||
|
|
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
||
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||
|
|
2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
|
||
|
|
drop table t0, t1, t2, t3;
|
||
|
|
create table t1 (a int);
|
||
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
||
|
|
create table t2 (a char(200), b char(200), c char(200), primary key (a,b,c)) engine=innodb;
|
||
|
|
insert into t2 select concat(a, repeat('X',198)),repeat('B',200),repeat('B',200) from t1;
|
||
|
|
insert into t2 select concat(a, repeat('Y',198)),repeat('B',200),repeat('B',200) from t1;
|
||
|
|
alter table t2 add filler1 int;
|
||
|
|
insert into t1 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
|
||
|
|
set @save_join_buffer_size=@@join_buffer_size;
|
||
|
|
set join_buffer_size=1;
|
||
|
|
select * from t2 where filler1 in ( select a from t1);
|
||
|
|
a b c filler1
|
||
|
|
set join_buffer_size=default;
|
||
|
|
drop table t1, t2;
|
||
|
|
create table t1 (a int not null);
|
||
|
|
drop procedure if exists p1;
|
||
|
|
CREATE PROCEDURE p1()
|
||
|
|
BEGIN
|
||
|
|
DECLARE EXIT HANDLER FOR SQLEXCEPTION select a from t1;
|
||
|
|
prepare s1 from '
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in (
|
||
|
|
select a from t1 where a in ( select a from t1)
|
||
|
|
)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))';
|
||
|
|
execute s1;
|
||
|
|
END;
|
||
|
|
|
|
||
|
|
call p1();
|
||
|
|
a
|
||
|
|
drop procedure p1;
|
||
|
|
drop table t1;
|
||
|
|
create table t0 (a int);
|
||
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
||
|
|
create table t1 (a int) as select A.a + 10 *(B.a + 10*C.a) as a from t0 A, t0 B, t0 C;
|
||
|
|
create table t2 (id int, a int, primary key(id), key(a)) as select a as id, a as a from t1;
|
||
|
|
show create table t2;
|
||
|
|
Table Create Table
|
||
|
|
t2 CREATE TABLE `t2` (
|
||
|
|
`id` int(11) NOT NULL DEFAULT '0',
|
||
|
|
`a` int(11) DEFAULT NULL,
|
||
|
|
PRIMARY KEY (`id`),
|
||
|
|
KEY `a` (`a`)
|
||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
||
|
|
set @a=0;
|
||
|
|
create table t3 as select * from t2 limit 0;
|
||
|
|
insert into t3 select @a:=@a+1, t2.a from t2, t0;
|
||
|
|
insert into t3 select @a:=@a+1, t2.a from t2, t0;
|
||
|
|
insert into t3 select @a:=@a+1, t2.a from t2, t0;
|
||
|
|
alter table t3 add primary key(id), add key(a);
|
||
|
|
The following must use loose index scan over t3, key a:
|
||
|
|
explain select count(a) from t2 where a in ( SELECT a FROM t3);
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY t2 index a a 5 NULL 1000 Using index
|
||
|
|
1 PRIMARY t3 index a a 5 NULL 30000 Using index; Materialize
|
||
|
|
select count(a) from t2 where a in ( SELECT a FROM t3);
|
||
|
|
count(a)
|
||
|
|
1000
|
||
|
|
drop table t0,t1,t2,t3;
|
||
|
|
|
||
|
|
BUG#42740: crash in optimize_semijoin_nests
|
||
|
|
|
||
|
|
create table t1 (c6 timestamp,key (c6)) engine=innodb;
|
||
|
|
create table t2 (c2 double) engine=innodb;
|
||
|
|
explain select 1 from t2 where c2 = any (select log10(null) from t1 where c6 <null) ;
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||
|
|
drop table t1, t2;
|
||
|
|
#
|
||
|
|
# BUG#42742: crash in setup_sj_materialization, Copy_field::set
|
||
|
|
#
|
||
|
|
create table t3 ( c1 year) engine=innodb;
|
||
|
|
insert into t3 values (2135),(2142);
|
||
|
|
create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb;
|
||
|
|
# The following must not crash, EXPLAIN should show one SJ strategy, not a mix:
|
||
|
|
explain select 1 from t2 where
|
||
|
|
c2 in (select 1 from t3, t2) and
|
||
|
|
c1 in (select convert(c6,char(1)) from t2);
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
|
||
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
|
||
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
|
||
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2)
|
||
|
|
drop table t2, t3;
|
||
|
|
set join_cache_level=default;
|
||
|
|
show variables like 'join_cache_level';
|
||
|
|
Variable_name Value
|
||
|
|
join_cache_level 1
|