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Commit a87f2277 authored by Yuchen Pei's avatar Yuchen Pei
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MDEV-22534 Decorrelate IN subquery 

Transform

in (select inner_col' from inner_table where inner_col = outer_col)

to

, outer_col in (select inner_col', inner_col from inner_table)

Achieved by implementing Item_in_subselect::exists2in_processor(),
accompanied with comprehensive test coverage. Factored out common code
between the two transformations.

Caveat:

- Cannot recognise bad item mismatch in equalities that causes
  materialization to not materialize down the road
parent 6219630d
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Showing with 1979 additions and 295 deletions
mysql-test/main/explain_json.result
View file @ a87f2277
...@@ -906,7 +906,7 @@ EXPLAIN ...@@ -906,7 +906,7 @@ EXPLAIN
"buffer_type": "flat", "buffer_type": "flat",
"buffer_size": "141", "buffer_size": "141",
"join_type": "BNL", "join_type": "BNL",
"attached_condition": "t1.b = t2.b and t1.a = t2.a" "attached_condition": "t1.a = t2.a and t1.b = t2.b"
} }
} }
] ]
...@@ -921,7 +921,8 @@ explain ...@@ -921,7 +921,8 @@ explain
select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b); select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 1 PRIMARY t2 ALL NULL NULL NULL NULL 10
1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 10
explain format=json explain format=json
select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b); select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b);
EXPLAIN EXPLAIN
...@@ -929,6 +930,7 @@ EXPLAIN ...@@ -929,6 +930,7 @@ EXPLAIN
"query_block": { "query_block": {
"select_id": 1, "select_id": 1,
"cost": "COST_REPLACED", "cost": "COST_REPLACED",
"const_condition": "1",
"nested_loop": [ "nested_loop": [
{ {
"table": { "table": {
...@@ -941,25 +943,36 @@ EXPLAIN ...@@ -941,25 +943,36 @@ EXPLAIN
} }
}, },
{ {
"duplicates_removal": [ "table": {
"table_name": "<subquery2>",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "8",
"used_key_parts": ["a", "b"],
"ref": ["func", "func"],
"rows": 1,
"filtered": 100,
"materialized": {
"unique": 1,
"query_block": {
"select_id": 2,
"nested_loop": [
{ {
"block-nl-join": {
"table": { "table": {
"table_name": "t1", "table_name": "t1",
"access_type": "ALL", "access_type": "ALL",
"loops": 10, "loops": 1,
"rows": 10, "rows": 10,
"cost": "COST_REPLACED", "cost": "COST_REPLACED",
"filtered": 10 "filtered": 100
},
"buffer_type": "flat",
"buffer_size": "206",
"join_type": "BNL",
"attached_condition": "t1.b = t2.b and t1.a = t2.a"
} }
} }
] ]
} }
}
}
}
] ]
} }
} }
......
mysql-test/main/innodb_ext_key.result
View file @ a87f2277
...@@ -384,15 +384,16 @@ EXPLAIN ...@@ -384,15 +384,16 @@ EXPLAIN
SELECT a FROM t1 AS t, t2 as t2_out SELECT a FROM t1 AS t, t2 as t2_out
WHERE t2_out.c = t.a AND t.b IN (SELECT b FROM t1, t2 WHERE b = t.b); WHERE t2_out.c = t.a AND t.b IN (SELECT b FROM t1, t2 WHERE b = t.b);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index b b 7 NULL 10 Using index; Start temporary 1 PRIMARY t index a,b b 7 NULL 10 Using index
1 PRIMARY t ref a,b b 3 test.t1.b 2 Using index
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; End temporary; Using join buffer (flat, BNL join)
1 PRIMARY t2_out eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index 1 PRIMARY t2_out eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED t1 index b b 7 NULL 10 Using index
2 MATERIALIZED t2 index NULL PRIMARY 4 NULL 11 Using index; Using join buffer (flat, BNL join)
SELECT a FROM t1 AS t, t2 as t2_out SELECT a FROM t1 AS t, t2 as t2_out
WHERE t2_out.c = t.a AND t.b IN (SELECT b FROM t1, t2 WHERE b = t.b); WHERE t2_out.c = t.a AND t.b IN (SELECT b FROM t1, t2 WHERE b = t.b);
a a
24 24
Last_query_cost 0.120558 Last_query_cost 0.083937
DROP TABLE t1,t2; DROP TABLE t1,t2;
# #
# LP Bug #923236: hash join + extended_keys = on # LP Bug #923236: hash join + extended_keys = on
......
mysql-test/main/rowid_filter_innodb.result
View file @ a87f2277
...@@ -3435,11 +3435,11 @@ WHERE t1.c1 NOT IN (SELECT t2.c1 FROM t2, t1 AS a1 ...@@ -3435,11 +3435,11 @@ WHERE t1.c1 NOT IN (SELECT t2.c1 FROM t2, t1 AS a1
WHERE t2.i1 = t1.pk AND t2.i1 BETWEEN 3 AND 5); WHERE t2.i1 = t1.pk AND t2.i1 BETWEEN 3 AND 5);
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 60 100.00 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 60 100.00 Using where
2 DEPENDENT SUBQUERY t2 ref|filter c1,i1 c1|i1 3|5 func 38 (25%) 25.00 Using where; Full scan on NULL key; Using rowid filter 2 MATERIALIZED t2 ALL c1,i1 NULL NULL NULL 192 25.00 Using where
2 DEPENDENT SUBQUERY a1 ALL NULL NULL NULL NULL 60 100.00 Using join buffer (flat, BNL join) 2 MATERIALIZED a1 ALL NULL NULL NULL NULL 60 100.00 Using join buffer (flat, BNL join)
Warnings: Warnings:
Note 1276 Field or reference 'test.t1.pk' of SELECT #2 was resolved in SELECT #1 Note 1276 Field or reference 'test.t1.pk' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`c1` AS `c1` from `test`.`t1` where !<expr_cache><`test`.`t1`.`c1`,`test`.`t1`.`pk`>(<in_optimizer>(`test`.`t1`.`c1`,<exists>(/* select#2 */ select `test`.`t2`.`c1` from `test`.`t2` join `test`.`t1` `a1` where `test`.`t2`.`i1` = `test`.`t1`.`pk` and `test`.`t2`.`i1` between 3 and 5 and trigcond(<cache>(`test`.`t1`.`c1`) = `test`.`t2`.`c1`)))) Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`c1` AS `c1` from `test`.`t1` where !<expr_cache><`test`.`t1`.`c1`,`test`.`t1`.`pk`>(<in_optimizer>((`test`.`t1`.`c1`,`test`.`t1`.`pk`),(`test`.`t1`.`c1`,`test`.`t1`.`pk`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`c1`,`test`.`t2`.`i1` from `test`.`t2` join `test`.`t1` `a1` where `test`.`t2`.`i1` is not null and `test`.`t2`.`i1` between 3 and 5 ), <primary_index_lookup>(`test`.`t1`.`c1` in <temporary table> on distinct_key where `test`.`t1`.`c1` = `<subquery2>`.`c1` and `test`.`t1`.`pk` = `<subquery2>`.`i1`))))
SELECT * FROM t1 SELECT * FROM t1
WHERE t1.c1 NOT IN (SELECT t2.c1 FROM t2, t1 AS a1 WHERE t1.c1 NOT IN (SELECT t2.c1 FROM t2, t1 AS a1
WHERE t2.i1 = t1.pk AND t2.i1 BETWEEN 3 AND 5); WHERE t2.i1 = t1.pk AND t2.i1 BETWEEN 3 AND 5);
......
mysql-test/main/subselect4.result
View file @ a87f2277
...@@ -225,7 +225,7 @@ EXPLAIN ...@@ -225,7 +225,7 @@ EXPLAIN
SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2a.i FROM t2a WHERE t2a.pk = t1.pk); SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2a.i FROM t2a WHERE t2a.pk = t1.pk);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
2 DEPENDENT SUBQUERY t2a unique_subquery PRIMARY PRIMARY 8 const,test.t1.pk 1 Using index; Using where; Full scan on NULL key 2 DEPENDENT SUBQUERY t2a unique_subquery PRIMARY PRIMARY 8 const,func 1 Using index; Using where; Full scan on NULL key
SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2a.i FROM t2a WHERE t2a.pk = t1.pk); SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2a.i FROM t2a WHERE t2a.pk = t1.pk);
pk i pk i
SELECT * FROM t1 WHERE 1+NULL NOT IN (SELECT t2a.i FROM t2a WHERE t2a.pk = t1.pk); SELECT * FROM t1 WHERE 1+NULL NOT IN (SELECT t2a.i FROM t2a WHERE t2a.pk = t1.pk);
...@@ -265,7 +265,7 @@ EXPLAIN ...@@ -265,7 +265,7 @@ EXPLAIN
SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk); SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,test.t1.pk 1 Using index; Using where; Full scan on NULL key 2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,func 1 Using index; Using where; Full scan on NULL key
SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk); SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk);
pk i pk i
SELECT * FROM t1 WHERE NULL IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk) IS UNKNOWN; SELECT * FROM t1 WHERE NULL IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk) IS UNKNOWN;
...@@ -303,7 +303,7 @@ EXPLAIN ...@@ -303,7 +303,7 @@ EXPLAIN
SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2a.i, t2a.pk FROM t2a WHERE t2a.pk = t1.pk); SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2a.i, t2a.pk FROM t2a WHERE t2a.pk = t1.pk);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
2 DEPENDENT SUBQUERY t2a unique_subquery PRIMARY PRIMARY 8 const,test.t1.pk 1 Using index; Using where; Full scan on NULL key 2 DEPENDENT SUBQUERY t2a const PRIMARY PRIMARY 8 const,const 1 Using where; Using index; Full scan on NULL key
SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2a.i, t2a.pk FROM t2a WHERE t2a.pk = t1.pk); SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2a.i, t2a.pk FROM t2a WHERE t2a.pk = t1.pk);
pk i pk i
0 10 0 10
...@@ -335,7 +335,7 @@ EXPLAIN ...@@ -335,7 +335,7 @@ EXPLAIN
SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2c.i, t2c.pk FROM t2c WHERE t2c.pk = t1.pk); SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2c.i, t2c.pk FROM t2c WHERE t2c.pk = t1.pk);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,test.t1.pk 1 Using index; Using where; Full scan on NULL key 2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,const 0 Using index; Using where; Full scan on NULL key
SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2c.i, t2c.pk FROM t2c WHERE t2c.pk = t1.pk); SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2c.i, t2c.pk FROM t2c WHERE t2c.pk = t1.pk);
pk i pk i
0 10 0 10
......
mysql-test/main/subselect_decorrelate_in.result 0 → 100644
View file @ a87f2277
This diff is collapsed.
mysql-test/main/subselect_decorrelate_in.test 0 → 100644
View file @ a87f2277
This diff is collapsed.
mysql-test/main/subselect_extra_no_semijoin.result
View file @ a87f2277
...@@ -454,7 +454,7 @@ WHERE t2.c = v1.c AND t2.c = v1.b AND v1.b = t3.c); ...@@ -454,7 +454,7 @@ WHERE t2.c = v1.c AND t2.c = v1.b AND v1.b = t3.c);
id select_type table type possible_keys key key_len ref rows Extra 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 t3 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 1 2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY <derived3> ref key1 key1 8 const,const 0 Using where 2 DEPENDENT SUBQUERY <derived3> ref key0 key0 8 const,const 0 Using where
3 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where 3 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where
SELECT * FROM t3 SELECT * FROM t3
WHERE t3.b IN (SELECT v1.b FROM v1, t2 WHERE t3.b IN (SELECT v1.b FROM v1, t2
...@@ -476,7 +476,7 @@ EXPLAIN ...@@ -476,7 +476,7 @@ EXPLAIN
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a); SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 5 test.t1.a 1 Using where 2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 10 func,func 1 Using where
3 DERIVED t2 ALL NULL NULL NULL NULL 2 3 DERIVED t2 ALL NULL NULL NULL NULL 2
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a); SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
a b a b
......
mysql-test/main/subselect_mat.result
View file @ a87f2277
...@@ -387,10 +387,10 @@ id select_type table type possible_keys key key_len ref rows filtered Extra ...@@ -387,10 +387,10 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
6 MATERIALIZED t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index 6 MATERIALIZED t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where 4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where
3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where 3 MATERIALIZED t3a ALL NULL NULL NULL NULL 4 100.00
Warnings: Warnings:
Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(/* select#3 */ select `test`.`t3a`.`c2` from `test`.`t3` `t3a` where `test`.`t3a`.`c1` = `test`.`t1`.`a1` and <cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where `test`.`t3b`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#5 */ select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c1`,`test`.`t3c`.`c2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (/* select#6 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where `test`.`t2i`.`b2` > '0' ), <primary_index_lookup>(`test`.`t3c`.`c1` in <temporary table> on distinct_key where `test`.`t3c`.`c1` = `<subquery6>`.`b1` and `test`.`t3c`.`c2` = `<subquery6>`.`b2`)))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery5>`.`c1` and `test`.`t1`.`a2` = `<subquery5>`.`c2`)))) Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t2`.`b2`,`test`.`t1`.`a1`),(`test`.`t2`.`b2`,`test`.`t1`.`a1`) in ( <materialize> (/* select#3 */ select `test`.`t3a`.`c2`,`test`.`t3a`.`c1` from `test`.`t3` `t3a` where 1 ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery3>`.`c2` and `test`.`t1`.`a1` = `<subquery3>`.`c1`)))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where `test`.`t3b`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#5 */ select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c1`,`test`.`t3c`.`c2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (/* select#6 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where `test`.`t2i`.`b2` > '0' ), <primary_index_lookup>(`test`.`t3c`.`c1` in <temporary table> on distinct_key where `test`.`t3c`.`c1` = `<subquery6>`.`b1` and `test`.`t3c`.`c2` = `<subquery6>`.`b2`)))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery5>`.`c1` and `test`.`t1`.`a2` = `<subquery5>`.`c2`))))
select * from t1 select * from t1
where (a1, a2) in (select b1, b2 from t2 where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or where b2 in (select c2 from t3 t3a where c1 = a1) or
...@@ -520,11 +520,11 @@ id select_type table type possible_keys key key_len ref rows filtered Extra ...@@ -520,11 +520,11 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
6 DEPENDENT SUBQUERY t2i index_subquery it2i1,it2i2,it2i3 it2i3 18 func,func 1 100.00 Using index; Using where 6 DEPENDENT SUBQUERY t2i index_subquery it2i1,it2i2,it2i3 it2i3 18 func,func 1 100.00 Using index; Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where 4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where
3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where 3 MATERIALIZED t3a ALL NULL NULL NULL NULL 4 100.00
Warnings: Warnings:
Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
Note 1276 Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1 Note 1276 Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(/* select#3 */ select `test`.`t3a`.`c2` from `test`.`t3` `t3a` where `test`.`t3a`.`c1` = `test`.`t1`.`a1` and <cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where `test`.`t3b`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#5 */ select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c1`,`test`.`t3c`.`c2`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),<exists>(<index_lookup>(<cache>(`test`.`t3c`.`c1`) in t2i on it2i3 where (`test`.`t2i`.`b2` > '0' or `test`.`t2i`.`b2` = `test`.`t1`.`a2`) and <cache>(`test`.`t3c`.`c1`) = `test`.`t2i`.`b1` and <cache>(`test`.`t3c`.`c2`) = `test`.`t2i`.`b2`)))) and <cache>(`test`.`t1`.`a1`) = `test`.`t3c`.`c1` and <cache>(`test`.`t1`.`a2`) = `test`.`t3c`.`c2`))) Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t2`.`b2`,`test`.`t1`.`a1`),(`test`.`t2`.`b2`,`test`.`t1`.`a1`) in ( <materialize> (/* select#3 */ select `test`.`t3a`.`c2`,`test`.`t3a`.`c1` from `test`.`t3` `t3a` where 1 ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery3>`.`c2` and `test`.`t1`.`a1` = `<subquery3>`.`c1`)))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where `test`.`t3b`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#5 */ select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c1`,`test`.`t3c`.`c2`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),<exists>(<index_lookup>(<cache>(`test`.`t3c`.`c1`) in t2i on it2i3 where (`test`.`t2i`.`b2` > '0' or `test`.`t2i`.`b2` = `test`.`t1`.`a2`) and <cache>(`test`.`t3c`.`c1`) = `test`.`t2i`.`b1` and <cache>(`test`.`t3c`.`c2`) = `test`.`t2i`.`b2`)))) and <cache>(`test`.`t1`.`a1`) = `test`.`t3c`.`c1` and <cache>(`test`.`t1`.`a2`) = `test`.`t3c`.`c2`)))
explain extended explain extended
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01');
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
......
mysql-test/main/subselect_mat_cost_bugs.result
View file @ a87f2277
...@@ -446,8 +446,8 @@ SELECT i2 FROM t2 RIGHT JOIN t3 ON (c3 = c2) WHERE pk3 = i1 ...@@ -446,8 +446,8 @@ SELECT i2 FROM t2 RIGHT JOIN t3 ON (c3 = c2) WHERE pk3 = i1
); );
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t3 const PRIMARY PRIMARY 4 const 1 2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1
2 DEPENDENT SUBQUERY t2 index i2 i2 11 NULL 2 Using where; Using index 2 DEPENDENT SUBQUERY t2 index NULL i2 11 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
DROP TABLE t1,t2,t3; DROP TABLE t1,t2,t3;
# #
# MDEV-7599: in-to-exists chosen after min/max optimization # MDEV-7599: in-to-exists chosen after min/max optimization
......
mysql-test/main/subselect_sj2.result
View file @ a87f2277
...@@ -466,7 +466,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra ...@@ -466,7 +466,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2) 1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2)
Warnings: Warnings:
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1 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`.`a` = `test`.`t0`.`a` and `test`.`t1`.`a` = `test`.`t0`.`a` and `test`.`t1`.`b` = `test`.`t2`.`b` Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where `test`.`t1`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` = `test`.`t0`.`a` and `test`.`t1`.`a` = `test`.`t0`.`a`
select * from t0 select * from t0
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
t1.b=t2.b); t1.b=t2.b);
......
mysql-test/main/subselect_sj2_jcl6.result
View file @ a87f2277
...@@ -472,7 +472,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra ...@@ -472,7 +472,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2); Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan 1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2); Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
Warnings: Warnings:
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1 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`.`a` = `test`.`t0`.`a` and `test`.`t1`.`a` = `test`.`t0`.`a` and `test`.`t1`.`b` = `test`.`t2`.`b` Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where `test`.`t1`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` = `test`.`t0`.`a` and `test`.`t1`.`a` = `test`.`t0`.`a`
select * from t0 select * from t0
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
t1.b=t2.b); t1.b=t2.b);
......
mysql-test/main/subselect_sj2_mat.result
View file @ a87f2277
...@@ -468,7 +468,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra ...@@ -468,7 +468,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2) 1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2)
Warnings: Warnings:
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1 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`.`a` = `test`.`t0`.`a` and `test`.`t1`.`a` = `test`.`t0`.`a` and `test`.`t1`.`b` = `test`.`t2`.`b` Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where `test`.`t1`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` = `test`.`t0`.`a` and `test`.`t1`.`a` = `test`.`t0`.`a`
select * from t0 select * from t0
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
t1.b=t2.b); t1.b=t2.b);
......
mysql-test/main/update_use_source.result
View file @ a87f2277
...@@ -504,11 +504,13 @@ test.t1 analyze status OK ...@@ -504,11 +504,13 @@ test.t1 analyze status OK
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -1777,11 +1779,13 @@ test.t1 analyze status OK ...@@ -1777,11 +1779,13 @@ test.t1 analyze status OK
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -3051,11 +3055,13 @@ test.t1 analyze status OK ...@@ -3051,11 +3055,13 @@ test.t1 analyze status OK
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -4324,11 +4330,13 @@ test.t1 analyze status OK ...@@ -4324,11 +4330,13 @@ test.t1 analyze status OK
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -5598,11 +5606,13 @@ test.t1 analyze status OK ...@@ -5598,11 +5606,13 @@ test.t1 analyze status OK
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -6871,11 +6881,13 @@ test.t1 analyze status OK ...@@ -6871,11 +6881,13 @@ test.t1 analyze status OK
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -8145,11 +8157,13 @@ test.t1 analyze note The storage engine for the table doesn't support analyze ...@@ -8145,11 +8157,13 @@ test.t1 analyze note The storage engine for the table doesn't support analyze
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
...@@ -9410,11 +9424,13 @@ test.t1 analyze note The storage engine for the table doesn't support analyze ...@@ -9410,11 +9424,13 @@ test.t1 analyze note The storage engine for the table doesn't support analyze
explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain select * from t1 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); explain update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 32 1 PRIMARY t1 ALL NULL NULL NULL NULL 32
1 PRIMARY a ALL NULL NULL NULL NULL 32 Using where; FirstMatch(t1) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
2 MATERIALIZED a ALL NULL NULL NULL NULL 32
update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1); update t1 set c3=c3+110 where c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
affected rows: 32 affected rows: 32
info: Rows matched: 32 Changed: 32 Warnings: 0 info: Rows matched: 32 Changed: 32 Warnings: 0
......
sql/item_subselect.cc
View file @ a87f2277
This diff is collapsed.
sql/item_subselect.h
View file @ a87f2277
...@@ -365,6 +365,13 @@ class Item_maxmin_subselect :public Item_singlerow_subselect ...@@ -365,6 +365,13 @@ class Item_maxmin_subselect :public Item_singlerow_subselect
void no_rows_in_result() override; void no_rows_in_result() override;
}; };
typedef struct st_eq_field_outer
{
Item **eq_ref;
Item_ident *local_field;
Item *outer_exp;
} EQ_FIELD_OUTER;
/* exists subselect */ /* exists subselect */
class Item_exists_subselect :public Item_subselect class Item_exists_subselect :public Item_subselect
...@@ -375,7 +382,12 @@ class Item_exists_subselect :public Item_subselect ...@@ -375,7 +382,12 @@ class Item_exists_subselect :public Item_subselect
void init_length_and_dec(); void init_length_and_dec();
bool select_prepare_to_be_in(); bool select_prepare_to_be_in();
bool exists2in_prepare(THD *thd, Dynamic_array<EQ_FIELD_OUTER> &eqs,
bool *will_be_correlated);
bool exists2in_create_or_update_in(THD *thd,
const Dynamic_array<EQ_FIELD_OUTER> &eqs,
Item** left_exp_ref);
bool exists2in_and_is_not_nulls(uint offset, Item **left_exp_ref);
public: public:
/* /*
Used by subquery optimizations to keep track about in which clause this Used by subquery optimizations to keep track about in which clause this
...@@ -617,13 +629,22 @@ class Item_in_subselect :public Item_exists_subselect ...@@ -617,13 +629,22 @@ class Item_in_subselect :public Item_exists_subselect
*/ */
bool converted_from_in_predicate; bool converted_from_in_predicate;
/*
-1 means "do nothing"
Other value means that we can assume that left_expr->element_index(i)
cannot be NULL (because decorrelation code has added IS NOT NULL before
the subquery predicate).
*/
int not_nulls_after;
Item_in_subselect(THD *thd_arg, Item * left_expr, st_select_lex *select_lex); Item_in_subselect(THD *thd_arg, Item * left_expr, st_select_lex *select_lex);
Item_in_subselect(THD *thd_arg): Item_in_subselect(THD *thd_arg):
Item_exists_subselect(thd_arg), left_expr_cache(0), first_execution(TRUE), Item_exists_subselect(thd_arg), left_expr_cache(0), first_execution(TRUE),
in_strategy(SUBS_NOT_TRANSFORMED), in_strategy(SUBS_NOT_TRANSFORMED),
pushed_cond_guards(NULL), func(NULL), do_not_convert_to_sj(FALSE), pushed_cond_guards(NULL), func(NULL), do_not_convert_to_sj(FALSE),
is_jtbm_merged(FALSE), is_jtbm_const_tab(FALSE), upper_item(0), is_jtbm_merged(FALSE), is_jtbm_const_tab(FALSE), upper_item(0),
converted_from_in_predicate(FALSE) {} converted_from_in_predicate(FALSE),
not_nulls_after(-1) {}
void cleanup() override; void cleanup() override;
subs_type substype() override { return IN_SUBS; } subs_type substype() override { return IN_SUBS; }
void reset() override void reset() override
...@@ -757,10 +778,7 @@ class Item_in_subselect :public Item_exists_subselect ...@@ -757,10 +778,7 @@ class Item_in_subselect :public Item_exists_subselect
Item_subselect::walk(processor, walk_subquery, arg); Item_subselect::walk(processor, walk_subquery, arg);
} }
bool exists2in_processor(void *opt_arg __attribute__((unused))) override bool exists2in_processor(void *opt_arg) override;
{
return 0;
};
bool pushdown_cond_for_in_subquery(THD *thd, Item *cond); bool pushdown_cond_for_in_subquery(THD *thd, Item *cond);
...@@ -804,6 +822,7 @@ class Item_allany_subselect :public Item_in_subselect ...@@ -804,6 +822,7 @@ class Item_allany_subselect :public Item_in_subselect
bool is_maxmin_applicable(JOIN *join); bool is_maxmin_applicable(JOIN *join);
bool transform_into_max_min(JOIN *join); bool transform_into_max_min(JOIN *join);
void no_rows_in_result(); void no_rows_in_result();
bool exists2in_processor(void *arg) override { return FALSE; }
}; };
......
sql/opt_subselect.h
View file @ a87f2277
...@@ -431,3 +431,6 @@ void get_delayed_table_estimates(TABLE *table, ...@@ -431,3 +431,6 @@ void get_delayed_table_estimates(TABLE *table,
enum_nested_loop_state join_tab_execution_startup(JOIN_TAB *tab); enum_nested_loop_state join_tab_execution_startup(JOIN_TAB *tab);
bool is_materialization_applicable(THD *thd, Item_in_subselect *in_subs,
st_select_lex *child_select);
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