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b753ac066b
This task deals with packing the sort key inside the sort buffer, which would
lead to efficient usage of the memory allocated for the sort buffer.
The changes brought by this feature are
1) Sort buffers would have sort keys of variable length
2) The format for sort keys inside the sort buffer would look like
|<sort_length><null_byte><key_part1><null_byte><key_part2>.......|
sort_length is the extra bytes that are required to store the variable
length of a sort key.
3) When packing of sort key is done we store the ORIGINAL VALUES inside
the sort buffer and not the STRXFRM form (mem-comparable sort keys).
4) Special comparison function packed_keys_comparison() is introduced
to compare 2 sort keys.
This patch also contains contributions from Sergei Petrunia.
851 lines
22 KiB
Text
851 lines
22 KiB
Text
drop table if exists t0,t1,t2,t3;
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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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# r_filtered=30%, because 3 rows match: 0,1,2
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analyze format=json select * from t0 where a<3;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t0",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 30,
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"attached_condition": "t0.a < 3"
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}
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}
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}
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create table t1 (a int, b int, c int, key(a));
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insert into t1 select A.a*10 + B.a, A.a*10 + B.a, A.a*10 + B.a from t0 A, t0 B;
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analyze
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select * from t0, t1 where t1.a=t0.a and t0.a > 9;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 0.00 Using where
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1 SIMPLE t1 ref a a 5 test.t0.a 1 NULL 100.00 NULL
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analyze format=json
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select * from t0, t1 where t1.a=t0.a and t0.a > 9;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t0",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 0,
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"attached_condition": "t0.a > 9 and t0.a is not null"
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},
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"table": {
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"table_name": "t1",
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"access_type": "ref",
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"possible_keys": ["a"],
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"key": "a",
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"key_length": "5",
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"used_key_parts": ["a"],
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"ref": ["test.t0.a"],
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"r_loops": 0,
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"rows": 1,
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"r_rows": null,
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"filtered": 100,
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"r_filtered": null
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}
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}
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}
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analyze
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select * from t0, t1 where t1.a=t0.a and t1.b<4;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
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1 SIMPLE t1 ref a a 5 test.t0.a 1 1.00 100.00 40.00 Using where
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analyze format=json
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select * from t0, t1 where t1.a=t0.a and t1.b<4;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t0",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 100,
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"attached_condition": "t0.a is not null"
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},
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"table": {
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"table_name": "t1",
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"access_type": "ref",
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"possible_keys": ["a"],
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"key": "a",
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"key_length": "5",
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"used_key_parts": ["a"],
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"ref": ["test.t0.a"],
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"r_loops": 10,
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"rows": 1,
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"r_rows": 1,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 40,
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"attached_condition": "t1.b < 4"
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}
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}
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}
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analyze
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select * from t1 tbl1, t1 tbl2 where tbl1.b<2 and tbl2.b>5;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE tbl1 ALL NULL NULL NULL NULL 100 100.00 100.00 2.00 Using where
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1 SIMPLE tbl2 ALL NULL NULL NULL NULL 100 100.00 100.00 94.00 Using where; Using join buffer (flat, BNL join)
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analyze format=json
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select * from t1 tbl1, t1 tbl2 where tbl1.b<20 and tbl2.b<60;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "tbl1",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 100,
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"r_rows": 100,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 20,
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"attached_condition": "tbl1.b < 20"
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},
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"block-nl-join": {
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"table": {
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"table_name": "tbl2",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 100,
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"r_rows": 100,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 60,
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"attached_condition": "tbl2.b < 60"
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},
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"buffer_type": "flat",
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"buffer_size": "1Kb",
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"join_type": "BNL",
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"r_filtered": 100
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}
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}
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}
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analyze format=json
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select * from t1 tbl1, t1 tbl2 where tbl1.b<20 and tbl2.b<60 and tbl1.c > tbl2.c;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "tbl1",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 100,
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"r_rows": 100,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 20,
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"attached_condition": "tbl1.b < 20"
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},
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"block-nl-join": {
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"table": {
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"table_name": "tbl2",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 100,
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"r_rows": 100,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 60,
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"attached_condition": "tbl2.b < 60"
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},
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"buffer_type": "flat",
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"buffer_size": "1Kb",
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"join_type": "BNL",
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"attached_condition": "tbl1.c > tbl2.c",
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"r_filtered": 15.833
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}
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}
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}
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drop table t1;
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drop table t0;
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#
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# MDEV-7674: ANALYZE shows r_rows=0
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#
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create table t1(a int);
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insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t2 (a int, key(a));
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insert into t2 values (0),(1);
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analyze format=json select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t1",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 100,
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"attached_condition": "t1.a is not null"
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},
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"table": {
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"table_name": "t2",
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"access_type": "ref",
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"possible_keys": ["a"],
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"key": "a",
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"key_length": "5",
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"used_key_parts": ["a"],
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"ref": ["test.t1.a"],
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"r_loops": 10,
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"rows": 2,
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"r_rows": 0.2,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 100,
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"using_index": true
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}
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}
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}
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drop table t1,t2;
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create table t1(a int);
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insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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#
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# MDEV-7679: ANALYZE crashes when printing WHERE when no default db
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#
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select database();
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database()
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test
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connect con1,localhost,root,,*NO-ONE*;
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connection con1;
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select database();
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database()
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NULL
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analyze format=json select * from test.t1 where t1.a<5;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t1",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 50,
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"attached_condition": "test.t1.a < 5"
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}
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}
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}
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disconnect con1;
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connection default;
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drop table t1;
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#
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# MDEV-7812: ANALYZE FORMAT=JSON UPDATE/DELETE doesnt print
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# the r_total_time_ms
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#
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create table t2(a int);
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insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t3(a int);
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insert into t3 select A.a + B.a* 10 + C.a * 100 from t2 A, t2 B, t2 C;
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create table t1 (pk int primary key);
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insert into t1 select a from t3;
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alter table t1 add b int;
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analyze format=json
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update t1 set b=pk;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"update": 1,
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"table_name": "t1",
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"access_type": "ALL",
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"rows": 1000,
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"r_rows": 1000,
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"r_filtered": 100,
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"r_total_time_ms": "REPLACED"
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}
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}
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}
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analyze format=json
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select * from t1 where pk < 10 and b > 4;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t1",
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"access_type": "range",
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"possible_keys": ["PRIMARY"],
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"key": "PRIMARY",
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"key_length": "4",
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"used_key_parts": ["pk"],
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 50,
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"index_condition": "t1.pk < 10",
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"attached_condition": "t1.b > 4"
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}
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}
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}
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analyze format=json
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delete from t1 where pk < 10 and b > 4;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"delete": 1,
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"table_name": "t1",
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"access_type": "range",
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"possible_keys": ["PRIMARY"],
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"key": "PRIMARY",
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"key_length": "4",
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"used_key_parts": ["pk"],
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"rows": 10,
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"r_rows": 10,
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"r_filtered": 50,
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"r_total_time_ms": "REPLACED",
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"attached_condition": "t1.pk < 10 and t1.b > 4"
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}
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}
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}
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drop table t1, t3, t2;
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#
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# MDEV-7833:ANALYZE FORMAT=JSON and Range checked for each record
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#
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create table t3(a int);
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insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t4(a int);
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insert into t4 select A.a + B.a* 10 + C.a * 100 from t3 A, t3 B, t3 C;
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create table t1 (lb1 int, rb1 int, lb2 int, rb2 int, c1 int, c2 int);
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insert into t1 values (1,2,10,20,15,15);
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insert into t1 values (3,5,10,20,15,15);
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insert into t1 values (10,20,10,20,15,15);
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insert into t1 values (10,20,1,2,15,15);
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insert into t1 values (10,20,10,20,1,3);
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create table t2 (key1 int, key2 int, key3 int, key4 int, col1 int,
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key(key1), key(key2), key(key3), key(key4));
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insert into t2 select a,a,a,a,a from t3;
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insert into t2 select 15,15,15,15,15 from t4;
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analyze format=json
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select * from t1, t2 where (t2.key1 between t1.lb1 and t1.rb1) and
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(t2.key2 between t1.lb2 and t1.rb2) and
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(t2.key3=t1.c1 OR t2.key4=t1.c2);
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t1",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 5,
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"r_rows": 5,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 100
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},
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"range-checked-for-each-record": {
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"keys": ["key1", "key2", "key3", "key4"],
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"r_keys": {
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"full_scan": 1,
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"index_merge": 1,
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"range": {
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"key1": 2,
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"key2": 1,
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"key3": 0,
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"key4": 0
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}
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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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"possible_keys": ["key1", "key2", "key3", "key4"],
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"r_loops": 5,
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"rows": 1010,
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"r_rows": 203.8,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 98.135
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}
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}
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}
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}
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drop table t1,t2,t3,t4;
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#
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# MDEV-7904: ANALYZE FORMAT=JSON SELECT .. UNION SELECT doesn't print r_rows for union output
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#
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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 (a int);
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INSERT INTO t1 select * from t0;
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analyze format=json (select * from t1 tbl1 where a<5) union (select * from t1 tbl2 where a in (2,3));
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ANALYZE
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{
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"query_block": {
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"union_result": {
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"table_name": "<union1,2>",
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"access_type": "ALL",
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"r_loops": 1,
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"r_rows": 5,
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"query_specifications": [
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "tbl1",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 10,
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"r_rows": 10,
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"r_table_time_ms": "REPLACED",
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"r_other_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 50,
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"attached_condition": "tbl1.a < 5"
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}
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}
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},
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{
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"query_block": {
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"select_id": 2,
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"operation": "UNION",
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
|
|
"table": {
|
|
"table_name": "tbl2",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 10,
|
|
"r_rows": 10,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 20,
|
|
"attached_condition": "tbl2.a in (2,3)"
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
drop table t0, t1;
|
|
#
|
|
# MDEV-7970: EXPLAIN FORMAT=JSON does not print HAVING
|
|
#
|
|
create table t0(a int);
|
|
insert into t0 values (0),(1),(2),(3);
|
|
create table t1(a int);
|
|
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
|
|
create table t2 (
|
|
a int,
|
|
b int,
|
|
key (a)
|
|
);
|
|
insert into t2 select A.a*1000 + B.a, A.a*1000 + B.a from t0 A, t1 B;
|
|
# normal HAVING
|
|
analyze format=json select a, max(b) as TOP from t2 group by a having TOP > a;
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"having_condition": "TOP > t2.a",
|
|
"filesort": {
|
|
"sort_key": "t2.a",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"r_used_priority_queue": false,
|
|
"r_output_rows": 0,
|
|
"r_buffer_size": "REPLACED",
|
|
"r_sort_mode": "sort_key,rowid",
|
|
"temporary_table": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 256,
|
|
"r_rows": 256,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
# HAVING is always TRUE (not printed)
|
|
analyze format=json select a, max(b) as TOP from t2 group by a having 1<>2;
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"filesort": {
|
|
"sort_key": "t2.a",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"r_used_priority_queue": false,
|
|
"r_output_rows": 256,
|
|
"r_buffer_size": "REPLACED",
|
|
"r_sort_mode": "sort_key,rowid",
|
|
"temporary_table": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 256,
|
|
"r_rows": 256,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
# HAVING is always FALSE (intercepted by message)
|
|
analyze format=json select a, max(b) as TOP from t2 group by a having 1=2;
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"table": {
|
|
"message": "Impossible HAVING"
|
|
}
|
|
}
|
|
}
|
|
# HAVING is absent
|
|
analyze format=json select a, max(b) as TOP from t2 group by a;
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"filesort": {
|
|
"sort_key": "t2.a",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"r_used_priority_queue": false,
|
|
"r_output_rows": 256,
|
|
"r_buffer_size": "REPLACED",
|
|
"r_sort_mode": "sort_key,rowid",
|
|
"temporary_table": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 256,
|
|
"r_rows": 256,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
drop table t0, t1, t2;
|
|
#
|
|
# MDEV-7267: Server crashes in Item_field::print on ANALYZE FORMAT=JSON
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (b INT);
|
|
INSERT INTO t2 VALUES (3),(4);
|
|
ANALYZE FORMAT=JSON SELECT STRAIGHT_JOIN * FROM t1, t2 WHERE b IN ( SELECT a FROM t1 );
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"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",
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
},
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 2,
|
|
"r_rows": 2,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 0,
|
|
"attached_condition": "<in_optimizer>(t2.b,t2.b in (subquery#2))"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "65",
|
|
"join_type": "BNL",
|
|
"attached_condition": "<in_optimizer>(t2.b,t2.b in (subquery#2))",
|
|
"r_filtered": null
|
|
},
|
|
"subqueries": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"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",
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop table t1,t2;
|
|
#
|
|
# MDEV-8864: Server crash #2 in Item_field::print on ANALYZE FORMAT=JSON
|
|
#
|
|
CREATE TABLE t1 (f1 INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (f2 INT) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (2),(3);
|
|
CREATE TABLE t3 (f3 INT) ENGINE=MyISAM;
|
|
INSERT INTO t3 VALUES (3),(4);
|
|
ANALYZE FORMAT=JSON
|
|
SELECT GROUP_CONCAT(f3) AS gc, ( SELECT MAX(f1) FROM t1, t2 WHERE f2 = f3 ) sq
|
|
FROM t2, t3
|
|
WHERE f3 IN ( 1, 2 )
|
|
GROUP BY sq ORDER BY gc;
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"filesort": {
|
|
"sort_key": "group_concat(t3.f3 separator ',')",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"r_used_priority_queue": false,
|
|
"r_output_rows": 0,
|
|
"r_buffer_size": "REPLACED",
|
|
"r_sort_mode": "packed_sort_key,rowid",
|
|
"temporary_table": {
|
|
"filesort": {
|
|
"sort_key": "(subquery#2)",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"r_used_priority_queue": false,
|
|
"r_output_rows": 0,
|
|
"r_buffer_size": "REPLACED",
|
|
"r_sort_mode": "sort_key,rowid",
|
|
"temporary_table": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 2,
|
|
"r_rows": 2,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
},
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 2,
|
|
"r_rows": 2,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 0,
|
|
"attached_condition": "t3.f3 in (1,2)"
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "1",
|
|
"join_type": "BNL",
|
|
"r_filtered": null
|
|
},
|
|
"subqueries": [
|
|
{
|
|
"expression_cache": {
|
|
"state": "uninitialized",
|
|
"r_loops": 0,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"r_loops": 0,
|
|
"rows": 2,
|
|
"r_rows": null,
|
|
"filtered": 100,
|
|
"r_filtered": null
|
|
},
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 0,
|
|
"rows": 2,
|
|
"r_rows": null,
|
|
"filtered": 100,
|
|
"r_filtered": null
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "65",
|
|
"join_type": "BNL",
|
|
"attached_condition": "t2.f2 = t3.f3",
|
|
"r_filtered": null
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
drop table t1,t2,t3;
|
|
#
|
|
# MDEV-13286: Floating point exception in Filesort_tracker::print_json_members(Json_writer*)
|
|
#
|
|
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, c int);
|
|
insert into t1 select a,a,a from t0;
|
|
create table t2 as select * from t1;
|
|
analyze format=json select a, (select t2.b from t2 where t2.a<t1.a order by t2.c limit 1) from t1 where t1.a<0;
|
|
ANALYZE
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"r_loops": 1,
|
|
"rows": 10,
|
|
"r_rows": 10,
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_filtered": 0,
|
|
"attached_condition": "t1.a < 0"
|
|
},
|
|
"subqueries": [
|
|
{
|
|
"expression_cache": {
|
|
"state": "uninitialized",
|
|
"r_loops": 0,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"read_sorted_file": {
|
|
"r_rows": null,
|
|
"filesort": {
|
|
"sort_key": "t2.c",
|
|
"r_loops": null,
|
|
"r_limit": null,
|
|
"r_used_priority_queue": null,
|
|
"r_output_rows": null,
|
|
"r_sort_mode": "sort_key,rowid",
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"r_loops": 0,
|
|
"rows": 10,
|
|
"r_rows": null,
|
|
"filtered": 100,
|
|
"r_filtered": null,
|
|
"attached_condition": "t2.a < t1.a"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
drop table t0,t1,t2;
|