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Merge 5.3->main -> 5.3-mwl90

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Sergey Petrunya 2011-05-29 12:58:44 +04:00
commit 5cd18326c2
40 changed files with 5352 additions and 1933 deletions
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2
mysql-test/r/subselect.result
View file

@ -1364,7 +1364,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index
1 PRIMARY t3 index a a 5 NULL 3 100.00 Using where; Using index
1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.61 Using index; FirstMatch(t2)
1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.00 Using index; FirstMatch(t2)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` = `test`.`t3`.`a`))
insert into t1 values (3,31);

39
mysql-test/r/subselect4.result
View file

@ -1,3 +1,4 @@
drop table if exists t1,t2,t3,t4,t5,t6;
#
# Bug #46791: Assertion failed:(table->key_read==0),function unknown
# function,file sql_base.cc
@ -356,7 +357,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
@ -371,13 +372,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
DEALLOCATE PREPARE stmt;
@ -394,7 +395,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
@ -409,13 +410,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
DEALLOCATE PREPARE stmt;
@ -431,7 +432,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
@ -446,13 +447,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
DEALLOCATE PREPARE stmt;
@ -579,7 +580,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
@ -594,13 +595,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
DEALLOCATE PREPARE stmt;
@ -617,7 +618,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
@ -632,13 +633,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
DEALLOCATE PREPARE stmt;
@ -654,7 +655,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
@ -669,13 +670,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
DEALLOCATE PREPARE stmt;
@ -735,6 +736,7 @@ WHERE ( t1.f10 ) IN ( SELECT f11 FROM t2 GROUP BY f11 ));
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
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
2 SUBQUERY <subquery3> eq_ref distinct_key distinct_key 5 test.t1.f10 1
3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary
SELECT * FROM t1
WHERE f3 = (
@ -749,6 +751,7 @@ WHERE ( f10, f10 ) IN ( SELECT f11, f11 FROM t2 GROUP BY f11 ));
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
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
2 SUBQUERY <subquery3> eq_ref distinct_key distinct_key 10 test.t1.f10,test.t1.f10 1
3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary
SELECT * FROM t1
WHERE f3 = (

271
mysql-test/r/subselect_mat.result
View file

@ -1,4 +1,7 @@
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
drop table if exists t1, t2, t3, t1i, t2i, t3i;
drop table if exists columns;
drop table if exists t1_16, t2_16, t3_16;
drop view if exists v1, v2, v1m, v2m;
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
@ -30,7 +33,7 @@ create index it3i3 on t3i (c1, c2);
insert into t1i select * from t1;
insert into t2i select * from t2;
insert into t3i select * from t3;
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
set @@optimizer_switch='materialization=on,in_to_exists=off,firstmatch=off';
/******************************************************************************
* Simple tests.
******************************************************************************/
@ -41,7 +44,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`))))))
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
a1 a2
1 - 01 2 - 01
@ -52,7 +55,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`))))))
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
a1 a2
1 - 01 2 - 01
@ -63,7 +66,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`))))))
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
a1 a2
1 - 01 2 - 01
@ -74,7 +77,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`min(b2)`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`min(b2)`))))))
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
a1 a2
1 - 01 2 - 01
@ -82,10 +85,10 @@ a1 a2
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
2 SUBQUERY t2i index it2i1,it2i3 it2i1 9 NULL 5 100.00 Using where; Using index
1 PRIMARY t1i index NULL _it1_idx # NULL 3 100.00 Using where;
2 SUBQUERY t2i index it2i1,it2i3 it2i1 # NULL 5 100.00 Using where;
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`))))))
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
a1 a2
1 - 01 2 - 01
@ -93,10 +96,10 @@ a1 a2
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
2 SUBQUERY t2i range it2i1,it2i3 it2i1 9 NULL 3 100.00 Using where; Using index for group-by
1 PRIMARY t1i index NULL # 18 # 3 100.00 #
2 SUBQUERY t2i range it2i1,it2i3 # 9 # 3 100.00 #
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`))))))
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
a1 a2
1 - 01 2 - 01
@ -104,10 +107,10 @@ a1 a2
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
2 SUBQUERY t2i index it2i1,it2i3 it2i3 18 NULL 5 100.00 Using where; Using index
1 PRIMARY t1i index NULL _it1_idx # NULL 3 100.00 Using where;
2 SUBQUERY t2i index it2i1,it2i3 it2i3 # NULL 5 100.00 Using where;
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`))))))
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
a1 a2
1 - 01 2 - 01
@ -115,10 +118,10 @@ a1 a2
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by
1 PRIMARY t1i index NULL # # # 3 100.00 #
2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 #
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`))))))
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
a1 a2
1 - 01 2 - 01
@ -126,10 +129,10 @@ a1 a2
explain extended
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by
1 PRIMARY t1i index NULL # # # 3 100.00 #
2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 #
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`min(b2)`))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`min(b2)`))))))
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
a1 a2
1 - 01 2 - 01
@ -140,7 +143,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2i range NULL it2i3 9 NULL 3 100.00 Using index for group-by
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`max(b2)`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`max(b2)`))))))
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
a1 a2
1 - 01 2 - 01
@ -169,47 +172,48 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`min(b2)`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`min(b2)`))))))
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
a1 a2
1 - 01 2 - 01
1 - 02 2 - 02
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1);
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='default,semijoin=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on';
set @@optimizer_switch='default,materialization=off';
execute st1;
a1 a2
1 - 01 2 - 01
1 - 02 2 - 02
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
set @@optimizer_switch='default,semijoin=off';
execute st1;
a1 a2
1 - 01 2 - 01
1 - 02 2 - 02
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on';
set @@optimizer_switch='default,materialization=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
set @@optimizer_switch='default,semijoin=off';
execute st1;
a1 a2
1 - 01 2 - 01
1 - 02 2 - 02
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on';
set @@optimizer_switch='default,materialization=off';
execute st1;
a1 a2
1 - 01 2 - 01
1 - 02 2 - 02
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
set @@optimizer_switch=@save_optimizer_switch;
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`))))))
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
a1 a2
1 - 01 2 - 01
@ -220,7 +224,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
2 SUBQUERY t2i index NULL it2i3 18 NULL 5 100.00 Using index
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`))))))
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
a1 a2
1 - 01 2 - 01
@ -275,7 +279,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
4 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`)))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery4>`.`b1`) and (`test`.`t3`.`c2` = `<subquery4>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery3>`.`c1`) and (`test`.`t1`.`a2` = `<subquery3>`.`c2`)))))))
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
(a1, a2) in (select c1, c2 from t3
@ -289,12 +293,12 @@ where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
3 SUBQUERY t3i index NULL it3i3 18 NULL 4 100.00 Using where; Using index
4 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
2 SUBQUERY t2i index it2i1,it2i3 it2i3 18 NULL 5 100.00 Using where; Using index
1 PRIMARY t1i index NULL # # # 3 100.00 #
3 SUBQUERY t3i index NULL # # # 4 100.00 #
4 SUBQUERY t2i index it2i2 # # # 5 100.00 #
2 SUBQUERY t2i index it2i1,it2i3 # # # 5 100.00 #
Warnings:
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3i`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`c2`)))))))
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `<subquery4>`.`b1`) and (`test`.`t3i`.`c2` = `<subquery4>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery3>`.`c1`) and (`test`.`t1i`.`a2` = `<subquery3>`.`c2`)))))))
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
@ -317,7 +321,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`))))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`)))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3`.`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
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
@ -342,7 +346,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(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 `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 `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` = `materialized subselect`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (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` = `materialized subselect`.`b1`) and (`test`.`t3c`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`)))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(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 `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 `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`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (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
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
@ -366,19 +370,19 @@ where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
5 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
6 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
7 UNION t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
9 SUBQUERY t3i index NULL it3i3 18 NULL 4 100.00 Using where; Using index
10 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
8 SUBQUERY t2i index it2i1,it2i3 it2i3 18 NULL 5 100.00 Using where; Using index
NULL UNION RESULT <union1,7> ALL NULL NULL NULL NULL NULL NULL
1 PRIMARY t1 ALL NULL # # # 3 100.00 #
5 SUBQUERY t3 ALL NULL # # # 4 100.00 #
6 SUBQUERY t2i index it2i2 # # # 5 100.00 #
2 SUBQUERY t2 ALL NULL # # # 5 100.00 #
4 SUBQUERY t3 ALL NULL # # # 4 100.00 #
3 SUBQUERY t3 ALL NULL # # # 4 100.00 #
7 UNION t1i index NULL # # # 3 100.00 #
9 SUBQUERY t3i index NULL # # # 4 100.00 #
10 SUBQUERY t2i index it2i2 # # # 5 100.00 #
8 SUBQUERY t2i index it2i1,it2i3 # # # 5 100.00 #
NULL UNION RESULT <union1,7> ALL NULL # # # NULL NULL #
Warnings:
Note 1003 (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`))))))) group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`)))))))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3i`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`c2`))))))))
Note 1003 (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3`.`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`)))))))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery8>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery8>`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `<subquery10>`.`b1`) and (`test`.`t3i`.`c2` = `<subquery10>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery9>`.`c1`) and (`test`.`t1i`.`a2` = `<subquery9>`.`c2`))))))))
(select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
@ -407,7 +411,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`)))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery5>`.`b1`) and (`test`.`t3`.`c2` = `<subquery5>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery4>`.`c1`) and (`test`.`t1`.`a2` = `<subquery4>`.`c2`)))))))
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(a1, a2) in (select c1, c2 from t3
@ -430,7 +434,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`c1` = `test`.`t1`.`a1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`c1`) and (`test`.`t3`.`c2` = `materialized subselect`.`c2`)))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`c1` = `test`.`t1`.`a1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery5>`.`b1`) and (`test`.`t3`.`c2` = `<subquery5>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery4>`.`c1`) and (`test`.`t3`.`c2` = `<subquery4>`.`c2`)))))))
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(c1, c2) in (select c1, c2 from t3
@ -476,7 +480,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
Warnings:
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 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(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 `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 `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` = `materialized subselect`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where (<expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`,`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 `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(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 `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 `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`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where (<expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`,`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
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
@ -549,7 +553,6 @@ a1 a2
Test that BLOBs are not materialized (except when arguments of some functions).
*/
# force materialization to be always considered
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
set @prefix_len = 6;
set @blob_len = 16;
set @suffix_len = @blob_len - @prefix_len;
@ -611,7 +614,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select substr(`test`.`t2_16`.`b1`,1,16) from `test`.`t2_16` where (`test`.`t2_16`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `materialized subselect`.`substring(b1,1,16)`))))))
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select substr(`test`.`t2_16`.`b1`,1,16) from `test`.`t2_16` where (`test`.`t2_16`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `<subquery2>`.`substring(b1,1,16)`))))))
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
@ -640,7 +643,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
@ -662,7 +665,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><concat(`test`.`t1`.`a1`,'x')>(<in_optimizer>(concat(`test`.`t1`.`a1`,'x'),<exists>(select left(`test`.`t1_16`.`a1`,8) from `test`.`t1_16` where (<expr_cache><`test`.`t1_16`.`a2`,`test`.`t1_16`.`a1`>(<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` join `test`.`t2` where ((`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and <expr_cache><`test`.`t2`.`b1`>(<in_optimizer>(`test`.`t2`.`b1`,`test`.`t2`.`b1` in ( <materialize> (select `test`.`t3`.`c1` from `test`.`t3` where (`test`.`t3`.`c2` > '0') ), <primary_index_lookup>(`test`.`t2`.`b1` in <temporary table> on distinct_key where ((`test`.`t2`.`b1` = `materialized subselect`.`c1`)))))) and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`) and (<cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`))))) and (<cache>(concat(`test`.`t1`.`a1`,'x')) = left(`test`.`t1_16`.`a1`,8))))))
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><concat(`test`.`t1`.`a1`,'x')>(<in_optimizer>(concat(`test`.`t1`.`a1`,'x'),<exists>(select left(`test`.`t1_16`.`a1`,8) from `test`.`t1_16` where (<expr_cache><`test`.`t1_16`.`a2`,`test`.`t1_16`.`a1`>(<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` join `test`.`t2` where ((`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and <expr_cache><`test`.`t2`.`b1`>(<in_optimizer>(`test`.`t2`.`b1`,`test`.`t2`.`b1` in ( <materialize> (select `test`.`t3`.`c1` from `test`.`t3` where (`test`.`t3`.`c2` > '0') ), <primary_index_lookup>(`test`.`t2`.`b1` in <temporary table> on distinct_key where ((`test`.`t2`.`b1` = `<subquery4>`.`c1`)))))) and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`) and (<cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`))))) and (<cache>(concat(`test`.`t1`.`a1`,'x')) = left(`test`.`t1_16`.`a1`,8))))))
drop table t1_16, t2_16, t3_16;
set @blob_len = 512;
set @suffix_len = @blob_len - @prefix_len;
@ -724,7 +727,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select substr(`test`.`t2_512`.`b1`,1,512) from `test`.`t2_512` where (`test`.`t2_512`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `materialized subselect`.`substring(b1,1,512)`))))))
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select substr(`test`.`t2_512`.`b1`,1,512) from `test`.`t2_512` where (`test`.`t2_512`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`substring(b1,1,512)`))))))
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
@ -738,7 +741,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
@ -751,7 +754,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
@ -831,7 +834,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
@ -844,7 +847,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
@ -924,7 +927,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
@ -937,7 +940,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `materialized subselect`.`group_concat(b1)`))))))
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
@ -951,7 +954,6 @@ insert into t1bit values (b'010', b'110');
insert into t2bit values (b'001', b'101');
insert into t2bit values (b'010', b'110');
insert into t2bit values (b'110', b'111');
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain extended select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
@ -959,7 +961,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1bit ALL NULL NULL NULL NULL 3 100.00 Using where
2 SUBQUERY t2bit ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` where <expr_cache><`test`.`t1bit`.`a2`,`test`.`t1bit`.`a1`>(<in_optimizer>((`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`),(`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`) in ( <materialize> (select `test`.`t2bit`.`b1`,`test`.`t2bit`.`b2` from `test`.`t2bit` ), <primary_index_lookup>(`test`.`t1bit`.`a1` in <temporary table> on distinct_key where ((`test`.`t1bit`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1bit`.`a2` = `materialized subselect`.`b2`))))))
Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` where <expr_cache><`test`.`t1bit`.`a2`,`test`.`t1bit`.`a1`>(<in_optimizer>((`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`),(`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`) in ( <materialize> (select `test`.`t2bit`.`b1`,`test`.`t2bit`.`b2` from `test`.`t2bit` ), <primary_index_lookup>(`test`.`t1bit`.`a1` in <temporary table> on distinct_key where ((`test`.`t1bit`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1bit`.`a2` = `<subquery2>`.`b2`))))))
select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
@ -994,7 +996,7 @@ drop table t1, t2, t3, t1i, t2i, t3i, columns;
/******************************************************************************
* Test the cache of the left operand of IN.
******************************************************************************/
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
# Test that default values of Cached_item are not used for comparison
create table t1 (s1 int);
create table t2 (s2 int);
insert into t1 values (5),(1),(0);
@ -1030,7 +1032,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`))))))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
select a from t1 where a in (select c from t2 where d >= 20);
a
2
@ -1044,7 +1046,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using where; Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`))))))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
select a from t1 where a in (select c from t2 where d >= 20);
a
2
@ -1058,7 +1060,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using where; Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`))))))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
select a from t1 where a in (select c from t2 where d >= 20);
a
2
@ -1071,7 +1073,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`))))))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
select a from t1 group by a having a in (select c from t2 where d >= 20);
a
2
@ -1083,7 +1085,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`))))))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
select a from t1 group by a having a in (select c from t2 where d >= 20);
a
2
@ -1136,47 +1138,47 @@ drop table t2;
create table t1 (a1 int key);
create table t2 (b1 int);
insert into t1 values (5);
Only the last query returns correct result. Filed as BUG#40037.
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
min(a1)
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off';
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='default,materialization=off';
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
min(a1)
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
select min(a1) from t1 where 7 in (select b1 from t2);
min(a1)
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off';
set @@optimizer_switch='default,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
select min(a1) from t1 where 7 in (select b1 from t2);
min(a1)
set @@optimizer_switch='materialization=off,in_to_exists=off,semijoin=on';
set @@optimizer_switch='default,materialization=off';
# with MariaDB and MWL#90, this particular case is solved:
explain select min(a1) from t1 where 7 in (select b1 from t2);
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
select min(a1) from t1 where 7 in (select b1 from t2);
min(a1)
NULL
# but when we go around MWL#90 code, the problem still shows up:
explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
min(a1)
set @@optimizer_switch= @save_optimizer_switch;
drop table t1,t2;
create table t1 (a char(2), b varchar(10));
insert into t1 values ('a', 'aaa');
insert into t1 values ('aa', 'aaaa');
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain select a,b from t1 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
@ -1196,15 +1198,17 @@ INSERT INTO t1 (f1, f2) VALUES (10, 1.668);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1, 1.789);
INSERT INTO t2 VALUES (13, 1.454);
SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
set @save_optimizer_switch=@@optimizer_switch;
SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
COUNT(*)
2
set @@optimizer_switch= @save_optimizer_switch;
DROP TABLE t1, t2;
CREATE TABLE t1 (
pk int,
@ -1217,11 +1221,12 @@ PRIMARY KEY (pk)
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
set @save_optimizer_switch=@@optimizer_switch;
SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Rowid-ordered scan
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
pk
@ -1230,6 +1235,7 @@ SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
pk
2
DROP TABLE t1, t2;
set optimizer_switch=@save_optimizer_switch;
#
# BUG#50019: Wrong result for IN-subquery with materialization
#
@ -1281,6 +1287,66 @@ a a in (select a from t1)
1 0
2 0
drop table t0, t1;
set optimizer_switch='firstmatch=on';
#
# MWL#90, review feedback: check what happens when the subquery
# looks like candidate for MWL#90 checking at the first glance
# but then subselect_hash_sj_engine::init_permanent() discovers
# that it's not possible to perform duplicate removal for the
# selected datatypes, and so materialization isn't applicable after
# all.
#
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
explain select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 Using where
select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
left(a1,7) left(a2,7)
1 - 01x 2 - 01x
drop table t1_1024, t2_1024;
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
create table t0 (a int);
insert into t0 values (0),(1),(2);
create table t1 (a int);
insert into t1 values (0),(1),(2);
explain select a, a in (select a from t1) from t0;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 3
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
select a, a in (select a from t1) from t0;
a a in (select a from t1)
0 1
1 1
2 1
prepare s from 'select a, a in (select a from t1) from t0';
execute s;
a a in (select a from t1)
0 1
1 1
2 1
update t1 set a=123;
execute s;
a a in (select a from t1)
0 0
1 0
2 0
drop table t0, t1;
#
# LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and
# partial_match_table_scan=on
@ -1371,7 +1437,7 @@ SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Rowid-ordered scan
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
pk
@ -1381,6 +1447,29 @@ pk
2
DROP TABLE t1, t2;
#
# BUG#724228: Wrong result with materialization=on and three aggregates in maria-5.3-mwl90
#
CREATE TABLE t1 ( f2 int(11)) ;
INSERT IGNORE INTO t1 VALUES ('7'),('9'),('7'),('4'),('2'),('6'),('8'),('5'),('6'),('188'),('2'),('1'),('1'),('0'),('9'),('4');
CREATE TABLE t2 ( f1 int(11), f2 int(11)) ENGINE=MyISAM;
INSERT IGNORE INTO t2 VALUES ('1','1');
CREATE TABLE t3 ( f1 int(11), f2 int(11), f3 int(11), PRIMARY KEY (f1)) ;
INSERT IGNORE INTO t3 VALUES ('16','6','1'),('18','3','4'),('19',NULL,'9'),('20','0','6'),('41','2','0'),('42','2','5'),('43','9','6'),('44','7','4'),('45','1','4'),('46','222','238'),('47','3','6'),('48','6','6'),('49',NULL,'1'),('50','5','1');
SET @_save_join_cache_level = @@join_cache_level;
SET @_save_optimizer_switch = @@optimizer_switch;
SET join_cache_level = 1;
SET optimizer_switch='materialization=on';
SELECT f1 FROM t3
WHERE
f1 NOT IN (SELECT MAX(f2) FROM t1) AND
f3 IN (SELECT MIN(f1) FROM t2) AND
f1 IN (SELECT COUNT(f2) FROM t1);
f1
16
SET @@join_cache_level = @_save_join_cache_level;
SET @@optimizer_switch = @_save_optimizer_switch;
drop table t1, t2, t3;
#
# LPBUG#719198 Ordered_key::cmp_key_with_search_key(rownum_t): Assertion `!compare_pred[i]->null_value'
# failed with subquery on both sides of NOT IN and materialization
#

2
mysql-test/r/subselect_no_mat.result
View file

@ -1368,7 +1368,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index
1 PRIMARY t3 index a a 5 NULL 3 100.00 Using where; Using index
1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.61 Using index; FirstMatch(t2)
1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.00 Using index; FirstMatch(t2)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` = `test`.`t3`.`a`))
insert into t1 values (3,31);

2
mysql-test/r/subselect_sj.result
View file

@ -961,7 +961,7 @@ FROM t1
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 105.00 Using where; FirstMatch(t2)
1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 100.00 Using where; FirstMatch(t2)
Warnings:
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_key` = `test`.`t2`.`varchar_nokey`) and (`test`.`t1`.`varchar_nokey` = `test`.`t2`.`varchar_nokey`) and ((`test`.`t2`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`))
SELECT varchar_nokey

4
mysql-test/r/subselect_sj2.result
View file

@ -354,6 +354,10 @@ Canada
China
Czech Republic
drop table t1, t2;
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)

4
mysql-test/r/subselect_sj2_jcl6.result
View file

@ -361,6 +361,10 @@ Canada
China
Czech Republic
drop table t1, t2;
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)

24
mysql-test/r/subselect_sj2_mat.result
View file

@ -33,7 +33,7 @@ a b
9 5
explain select * from t2 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 3
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t2 ref b b 5 test.t1.a 2
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where
select * from t2 where b in (select a from t1);
@ -53,7 +53,7 @@ insert into t3 select a,a, a,a,a from t0;
explain select * from t3 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL b NULL NULL NULL 10
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
select * from t3 where b in (select a from t1);
a b pk1 pk2 pk3
@ -76,7 +76,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
1 PRIMARY t3 ref b b 5 test.t0.a 1
2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where
set @save_ecp= @@engine_condition_pushdown;
@ -103,7 +103,7 @@ set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY t2 index b b 5 NULL 10 Using index
select * from t1;
a b
@ -131,7 +131,7 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join)
2 SUBQUERY it ALL NULL NULL NULL NULL 22
select
@ -165,7 +165,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY it ALL NULL NULL NULL NULL 32
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
@ -199,7 +199,7 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join)
2 SUBQUERY it ALL NULL NULL NULL NULL 22
select
@ -233,7 +233,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY it ALL NULL NULL NULL NULL 52
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
@ -353,7 +353,7 @@ 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 subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where
SELECT Name FROM t1
WHERE t1.Code IN (
@ -364,6 +364,10 @@ Canada
China
Czech Republic
drop table t1, t2;
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)
@ -697,7 +701,7 @@ 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 subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
2 SUBQUERY t3 index a a 5 NULL 30000 Using index
select count(a) from t2 where a in ( SELECT a FROM t3);
count(a)

2
mysql-test/r/subselect_sj_jcl6.result
View file

@ -969,7 +969,7 @@ FROM t1
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 105.00 Using where; FirstMatch(t2); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 100.00 Using where; FirstMatch(t2); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
Warnings:
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_key` = `test`.`t2`.`varchar_nokey`) and (`test`.`t1`.`varchar_nokey` = `test`.`t2`.`varchar_nokey`) and ((`test`.`t2`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`))
SELECT varchar_nokey

1360
mysql-test/r/subselect_sj_mat.result Normal file
View file

File diff suppressed because it is too large Load diff

103
mysql-test/r/subselect_sj_nonmerged.result Normal file
View file

@ -0,0 +1,103 @@
drop table if exists t0, t1, t2, t3, t4;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='materialization=on';
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select * from t0;
# The following should use full scan on <subquery2> and it must scan 1 row:
explain select * from t0 where a in (select max(a) from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 1
1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
2 SUBQUERY t1 ALL NULL NULL NULL NULL 10
select * from t0 where a in (select max(a) from t1);
a
9
insert into t1 values (11);
select * from t0 where a in (select max(a) from t1);
a
delete from t1 where a=11;
insert into t0 values (NULL);
select * from t0 where a in (select max(a) from t1);
a
9
delete from t0 where a is NULL;
delete from t1;
select * from t0 where a in (select max(a) from t1);
a
insert into t0 values (NULL);
select * from t0 where a in (select max(a) from t1);
a
delete from t0 where a is NULL;
drop table t1;
create table t1 (a int, b int);
insert into t1 select a,a from t0;
create table t2 as select * from t1 where a<5;
create table t3 as select (A.a + 10*B.a) as a from t0 A, t0 B;
alter table t3 add primary key(a);
# The following should have do a full scan on <subquery2> and scan 5 rows
# (despite that subquery's join output estimate is 50 rows)
explain select * from t3 where a in (select max(t2.a) from t1, t2 group by t2.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 5 Using where
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 8 <subquery2>.max(t2.a) 1 Using where; Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary
2 SUBQUERY t1 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
# Compare to this which really will have 50 record combinations:
explain select * from t3 where a in (select max(t2.a) from t1, t2 group by t2.b, t1.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 50 Using where
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 8 <subquery2>.max(t2.a) 1 Using where; Using index
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary
2 SUBQUERY t1 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
# Outer joins also work:
explain select * from t3
where a in (select max(t2.a) from t1 left join t2 on t1.a=t2.a group by t2.b, t1.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 50 Using where
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 8 <subquery2>.max(t2.a) 1 Using where; Using index
2 SUBQUERY t1 ALL NULL NULL NULL NULL 10 Using temporary
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where
create table t4 (a int, b int, filler char(20), unique key(a,b));
insert into t4 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t0 A, t0 B;
explain select * from t0, t4 where
t4.b=t0.a and t4.a in (select max(t2.a) from t1, t2 group by t2.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 10
1 PRIMARY t4 ALL a NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.t4.a 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary
2 SUBQUERY t1 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
insert into t4 select 100 + (B.a *100 + A.a), 100 + (B.a*100 + A.a), 'filler' from t4 A, t0 B;
explain select * from t4 where
t4.a in (select max(t2.a) from t1, t2 group by t2.b) and
t4.b in (select max(t2.a) from t1, t2 group by t2.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 5 Using where
1 PRIMARY <subquery3> ALL distinct_key NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t4 ref a a 10 <subquery2>.max(t2.a),<subquery3>.max(t2.a) 12
3 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary
3 SUBQUERY t1 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary
2 SUBQUERY t1 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
drop table t1,t2,t3,t4;
drop table t0;
#
# BUG#780359: Crash with get_fanout_with_deps in maria-5.3-mwl90
#
CREATE TABLE t1 (f1 int);
INSERT INTO t1 VALUES (2),(2);
CREATE TABLE t2 (f3 int);
INSERT INTO t2 VALUES (2),(2);
SELECT *
FROM t1
WHERE ( f1 ) IN (
SELECT t2.f3
FROM t2
WHERE t2.f3 = 97
AND t2.f3 = 50
GROUP BY 1
);
f1
DROP TABLE t1, t2;
set optimizer_switch=@save_optimizer_switch;

4
mysql-test/suite/vcol/inc/vcol_view.inc
View file

@ -69,10 +69,14 @@ create table t1 (a int not null,
insert into t1 (a) values (1), (2), (3), (4);
create view v1 as select b+1 from t1 order by 1 desc limit 2;
select * from v1;
--echo MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
--echo MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
explain select * from v1;
drop view v1;
create view v1 as select c+1 from t1 order by 1 desc limit 2;
select * from v1;
--echo MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
--echo MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
explain select * from v1;
drop view v1;
drop table t1;

4
mysql-test/suite/vcol/r/vcol_view_innodb.result
View file

@ -103,6 +103,8 @@ select * from v1;
b+1
0
-1
MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
@ -113,6 +115,8 @@ select * from v1;
c+1
0
-1
MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2

4
mysql-test/suite/vcol/r/vcol_view_myisam.result
View file

@ -103,6 +103,8 @@ select * from v1;
b+1
0
-1
MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
@ -113,6 +115,8 @@ select * from v1;
c+1
0
-1
MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2

3
mysql-test/t/subselect4.test
View file

@ -1,5 +1,8 @@
# General purpose bug fix tests go here : subselect.test too large
--disable_warnings
drop table if exists t1,t2,t3,t4,t5,t6;
--enable_warnings
--echo #
--echo # Bug #46791: Assertion failed:(table->key_read==0),function unknown

933
mysql-test/t/subselect_mat.test
View file

@ -3,913 +3,12 @@
# (WL#1110: Subquery optimization: materialization)
#
--disable_warnings
drop table if exists t1, t2, t3, t1i, t2i, t3i;
drop view if exists v1, v2, v1m, v2m;
--enable_warnings
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
create table t3 (c1 char(8), c2 char(8));
insert into t1 values ('1 - 00', '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t1 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 03', '2 - 03');
insert into t3 values ('1 - 01', '2 - 01');
insert into t3 values ('1 - 02', '2 - 02');
insert into t3 values ('1 - 03', '2 - 03');
insert into t3 values ('1 - 04', '2 - 04');
# Indexed columns
create table t1i (a1 char(8), a2 char(8));
create table t2i (b1 char(8), b2 char(8));
create table t3i (c1 char(8), c2 char(8));
create index it1i1 on t1i (a1);
create index it1i2 on t1i (a2);
create index it1i3 on t1i (a1, a2);
create index it2i1 on t2i (b1);
create index it2i2 on t2i (b2);
create index it2i3 on t2i (b1, b2);
create index it3i1 on t3i (c1);
create index it3i2 on t3i (c2);
create index it3i3 on t3i (c1, c2);
insert into t1i select * from t1;
insert into t2i select * from t2;
insert into t3i select * from t3;
# force the use of materialization
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
/******************************************************************************
* Simple tests.
******************************************************************************/
# non-indexed nullable fields
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
# indexed columns
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
explain extended
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
# BUG#31639: Wrong plan for uncorrelated subquery when loose scan is applicable.
explain extended
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st1;
execute st1;
prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st2;
execute st2;
explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
-- error 1235
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1);
# test re-optimization/re-execution with different execution methods
# prepare once, exec with different modes
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on';
execute st1;
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
execute st1;
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
--source t/subselect_sj_mat.test
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
execute st1;
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on';
execute st1;
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
# materialize the result of ORDER BY
# non-indexed fields
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
# indexed fields
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
/******************************************************************************
* Views, UNIONs, several levels of nesting.
******************************************************************************/
# materialize the result of subquery over temp-table view
create algorithm=merge view v1 as
select b1, c2 from t2, t3 where b2 > c2;
create algorithm=merge view v2 as
select b1, c2 from t2, t3 group by b2, c2;
create algorithm=temptable view v1m as
select b1, c2 from t2, t3 where b2 > c2;
create algorithm=temptable view v2m as
select b1, c2 from t2, t3 group by b2, c2;
select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null);
select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null);
select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null);
select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null);
drop view v1, v2, v1m, v2m;
# nested subqueries, views
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
explain extended
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# as above with correlated innermost subquery
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# multiple levels of nesting subqueries, unions
explain extended
(select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')
group by b1, b2) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
(select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')
group by b1, b2) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
# UNION of subqueries as a subquery (thus it is not computed via materialization)
explain extended
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# as above, with a join conditon between the outer references
explain extended
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(c1, c2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
a1 = c1;
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(c1, c2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
a1 = c1;
/******************************************************************************
* Negative tests, where materialization should not be applied.
******************************************************************************/
# UNION in a subquery
explain extended
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
# correlation
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2));
# subquery has no tables
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');
explain extended
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
/******************************************************************************
* Subqueries in other uncovered clauses.
******************************************************************************/
/* SELECT clause */
select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1;
/* GROUP BY clause */
create table columns (col int key);
insert into columns values (1), (2);
explain extended
select * from t1 group by (select col from columns limit 1);
select * from t1 group by (select col from columns limit 1);
explain extended
select * from t1 group by (a1 in (select col from columns));
select * from t1 group by (a1 in (select col from columns));
/* ORDER BY clause */
explain extended
select * from t1 order by (select col from columns limit 1);
select * from t1 order by (select col from columns limit 1);
/******************************************************************************
* Column types/sizes that affect materialization.
******************************************************************************/
/*
Test that BLOBs are not materialized (except when arguments of some functions).
*/
# force materialization to be always considered
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
set @prefix_len = 6;
# BLOB == 16 (small blobs that could be stored in HEAP tables)
set @blob_len = 16;
set @suffix_len = @blob_len - @prefix_len;
create table t1_16 (a1 blob(16), a2 blob(16));
create table t2_16 (b1 blob(16), b2 blob(16));
create table t3_16 (c1 blob(16), c2 blob(16));
insert into t1_16 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512)
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
# BLOB column at the second (intermediate) level of nesting
explain extended
select * from t1
where concat(a1,'x') IN
(select left(a1,8) from t1_16
where (a1, a2) IN
(select t2_16.b1, t2_16.b2 from t2_16, t2
where t2.b2 = substring(t2_16.b2,1,6) and
t2.b1 IN (select c1 from t3 where c2 > '0')));
drop table t1_16, t2_16, t3_16;
# BLOB == 512 (CONVERT_IF_BIGGER_TO_BLOB == 512)
set @blob_len = 512;
set @suffix_len = @blob_len - @prefix_len;
create table t1_512 (a1 blob(512), a2 blob(512));
create table t2_512 (b1 blob(512), b2 blob(512));
create table t3_512 (c1 blob(512), c2 blob(512));
insert into t1_512 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512)
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
drop table t1_512, t2_512, t3_512;
# BLOB == 1024 (group_concat_max_len == 1024)
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
create table t3_1024 (c1 blob(1024), c2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1024)
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
drop table t1_1024, t2_1024, t3_1024;
# BLOB == 1025
set @blob_len = 1025;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1025 (a1 blob(1025), a2 blob(1025));
create table t2_1025 (b1 blob(1025), b2 blob(1025));
create table t3_1025 (c1 blob(1025), c2 blob(1025));
insert into t1_1025 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1025)
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
drop table t1_1025, t2_1025, t3_1025;
# test for BIT fields
create table t1bit (a1 bit(3), a2 bit(3));
create table t2bit (b1 bit(3), b2 bit(3));
insert into t1bit values (b'000', b'100');
insert into t1bit values (b'001', b'101');
insert into t1bit values (b'010', b'110');
insert into t2bit values (b'001', b'101');
insert into t2bit values (b'010', b'110');
insert into t2bit values (b'110', b'111');
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain extended select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
drop table t1bit, t2bit;
# test mixture of BIT and BLOB
create table t1bb (a1 bit(3), a2 blob(3));
create table t2bb (b1 bit(3), b2 blob(3));
insert into t1bb values (b'000', '100');
insert into t1bb values (b'001', '101');
insert into t1bb values (b'010', '110');
insert into t2bb values (b'001', '101');
insert into t2bb values (b'010', '110');
insert into t2bb values (b'110', '111');
explain extended select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);
select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);
drop table t1bb, t2bb;
drop table t1, t2, t3, t1i, t2i, t3i, columns;
/******************************************************************************
* Test the cache of the left operand of IN.
******************************************************************************/
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
# Test that default values of Cached_item are not used for comparison
create table t1 (s1 int);
create table t2 (s2 int);
insert into t1 values (5),(1),(0);
insert into t2 values (0), (1);
select s2 from t2 where s2 in (select s1 from t1);
drop table t1, t2;
create table t1 (a int not null, b int not null);
create table t2 (c int not null, d int not null);
create table t3 (e int not null);
# the first outer row has no matching inner row
insert into t1 values (1,10);
insert into t1 values (1,20);
insert into t1 values (2,10);
insert into t1 values (2,20);
insert into t1 values (2,30);
insert into t1 values (3,20);
insert into t1 values (4,40);
insert into t2 values (2,10);
insert into t2 values (2,20);
insert into t2 values (2,40);
insert into t2 values (3,20);
insert into t2 values (4,10);
insert into t2 values (5,10);
insert into t3 values (10);
insert into t3 values (10);
insert into t3 values (20);
insert into t3 values (30);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);
create index it1a on t1(a);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);
# the first outer row has a matching inner row
insert into t2 values (1,10);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);
# cacheing for IN predicates inside a having clause - here the cached
# items are changed to point to temporary tables.
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
select a from t1 group by a having a in (select c from t2 where d >= 20);
# create an index that can be used for the outer query GROUP BY
create index iab on t1(a, b);
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
select a from t1 group by a having a in (select c from t2 where d >= 20);
explain extended
select a from t1 group by a
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
select a from t1 group by a
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
explain extended
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
drop table t1, t2, t3;
#
# BUG#36133 "Assertion `exec_method != MATERIALIZATION || (exec_method == MATERIALIZATION &&"
#
create table t2 (a int, b int, key(a), key(b));
insert into t2 values (3,3),(3,3),(3,3);
select 1 from t2 where
t2.a > 1
or
t2.a = 3 and not t2.a not in (select t2.b from t2);
drop table t2;
#
# BUG#37896 Assertion on entry of Item_in_subselect::exec on subquery with AND NOT
#
create table t1 (a1 int key);
create table t2 (b1 int);
insert into t1 values (5);
-- echo Only the last query returns correct result. Filed as BUG#40037.
# Query with group by, executed via materialization
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
# Query with group by, executed via IN=>EXISTS
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
# Executed with materialization
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
# Executed via IN=>EXISTS
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
# Executed with semi-join. Notice, this time we get a different result (NULL).
# This is the only correct result of all five queries. This difference is
# filed as BUG#40037.
set @@optimizer_switch='materialization=off,in_to_exists=off,semijoin=on';
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
drop table t1,t2;
#
# BUG#36752 "subquery materialization produces wrong results when comparing different types"
#
create table t1 (a char(2), b varchar(10));
insert into t1 values ('a', 'aaa');
insert into t1 values ('aa', 'aaaa');
set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
explain select a,b from t1 where b in (select a from t1);
select a,b from t1 where b in (select a from t1);
prepare st1 from "select a,b from t1 where b in (select a from t1)";
execute st1;
execute st1;
drop table t1;
#
# Bug #44303 Assertion failures in Field_new_decimal::store_decimal
# when executing materialized InsideOut semijoin
#
CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM;
INSERT INTO t1 (f1, f2) VALUES (1, 1.789);
INSERT INTO t1 (f1, f2) VALUES (13, 1.454);
INSERT INTO t1 (f1, f2) VALUES (10, 1.668);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1, 1.789);
INSERT INTO t2 VALUES (13, 1.454);
SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
DROP TABLE t1, t2;
#
# BUG#46548 IN-subqueries return 0 rows with materialization=on
#
CREATE TABLE t1 (
pk int,
a varchar(1),
b varchar(4),
c varchar(4),
d varchar(4),
PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
DROP TABLE t1, t2;
--echo #
--echo # BUG#50019: Wrong result for IN-subquery with materialization
--echo #
create table t1(i int);
insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
create table t2(i int);
insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
create table t3(i int);
insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
set @save_optimizer_switch=@@optimizer_switch;
set session optimizer_switch='materialization=off,in_to_exists=on';
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
set session optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3;
#
# Test that the contents of the temp table of a materialized subquery is
# cleaned up between PS re-executions.
@ -1016,6 +115,36 @@ SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
DROP TABLE t1, t2;
-- echo #
-- echo # BUG#724228: Wrong result with materialization=on and three aggregates in maria-5.3-mwl90
-- echo #
CREATE TABLE t1 ( f2 int(11)) ;
INSERT IGNORE INTO t1 VALUES ('7'),('9'),('7'),('4'),('2'),('6'),('8'),('5'),('6'),('188'),('2'),('1'),('1'),('0'),('9'),('4');
CREATE TABLE t2 ( f1 int(11), f2 int(11)) ENGINE=MyISAM;
INSERT IGNORE INTO t2 VALUES ('1','1');
CREATE TABLE t3 ( f1 int(11), f2 int(11), f3 int(11), PRIMARY KEY (f1)) ;
INSERT IGNORE INTO t3 VALUES ('16','6','1'),('18','3','4'),('19',NULL,'9'),('20','0','6'),('41','2','0'),('42','2','5'),('43','9','6'),('44','7','4'),('45','1','4'),('46','222','238'),('47','3','6'),('48','6','6'),('49',NULL,'1'),('50','5','1');
SET @_save_join_cache_level = @@join_cache_level;
SET @_save_optimizer_switch = @@optimizer_switch;
SET join_cache_level = 1;
SET optimizer_switch='materialization=on';
SELECT f1 FROM t3
WHERE
f1 NOT IN (SELECT MAX(f2) FROM t1) AND
f3 IN (SELECT MIN(f1) FROM t2) AND
f1 IN (SELECT COUNT(f2) FROM t1);
SET @@join_cache_level = @_save_join_cache_level;
SET @@optimizer_switch = @_save_optimizer_switch;
drop table t1, t2, t3;
--echo #
--echo # LPBUG#719198 Ordered_key::cmp_key_with_search_key(rownum_t): Assertion `!compare_pred[i]->null_value'
--echo # failed with subquery on both sides of NOT IN and materialization

6
mysql-test/t/subselect_sj2.test
View file

@ -494,6 +494,12 @@ drop table t1, t2;
# Bug#33062: subquery in stored routine cause crash
#
--disable_warnings
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
--enable_warnings
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);

974
mysql-test/t/subselect_sj_mat.test Normal file
View file

@ -0,0 +1,974 @@
#
# Hash semi-join regression tests
# (WL#1110: Subquery optimization: materialization)
#
--disable_warnings
drop table if exists t1, t2, t3, t1i, t2i, t3i;
drop table if exists columns;
drop table if exists t1_16, t2_16, t3_16;
drop view if exists v1, v2, v1m, v2m;
--enable_warnings
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
create table t3 (c1 char(8), c2 char(8));
insert into t1 values ('1 - 00', '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t1 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 03', '2 - 03');
insert into t3 values ('1 - 01', '2 - 01');
insert into t3 values ('1 - 02', '2 - 02');
insert into t3 values ('1 - 03', '2 - 03');
insert into t3 values ('1 - 04', '2 - 04');
# Indexed columns
create table t1i (a1 char(8), a2 char(8));
create table t2i (b1 char(8), b2 char(8));
create table t3i (c1 char(8), c2 char(8));
create index it1i1 on t1i (a1);
create index it1i2 on t1i (a2);
create index it1i3 on t1i (a1, a2);
create index it2i1 on t2i (b1);
create index it2i2 on t2i (b2);
create index it2i3 on t2i (b1, b2);
create index it3i1 on t3i (c1);
create index it3i2 on t3i (c2);
create index it3i3 on t3i (c1, c2);
insert into t1i select * from t1;
insert into t2i select * from t2;
insert into t3i select * from t3;
# force the use of materialization
set @@optimizer_switch='materialization=on,in_to_exists=off,firstmatch=off';
/******************************************************************************
* Simple tests.
******************************************************************************/
# non-indexed nullable fields
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
# indexed columns
--replace_column 7 #
--replace_regex /it1.*/_it1_idx/ /test.t2i.*/_ref_/ /Using index$// /Using where$//
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
--replace_column 6 # 8 # 11 #
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
--replace_column 7 #
--replace_regex /it1.*/_it1_idx/ /test.t2i.*/_ref_/ /Using index$// /Using where$//
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
--replace_column 6 # 7 # 8 # 11 #
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
--replace_column 6 # 7 # 8 # 11 #
explain extended
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
# BUG#31639: Wrong plan for uncorrelated subquery when loose scan is applicable.
explain extended
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st1;
execute st1;
prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st2;
execute st2;
explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
-- error 1235
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1);
# test re-optimization/re-execution with different execution methods
# prepare once, exec with different modes
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='default,semijoin=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='default,materialization=off';
execute st1;
set @@optimizer_switch='default,semijoin=off';
execute st1;
set @@optimizer_switch='default,materialization=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='default,semijoin=off';
execute st1;
set @@optimizer_switch='default,materialization=off';
execute st1;
set @@optimizer_switch=@save_optimizer_switch;
# materialize the result of ORDER BY
# non-indexed fields
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
# indexed fields
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
/******************************************************************************
* Views, UNIONs, several levels of nesting.
******************************************************************************/
# materialize the result of subquery over temp-table view
create algorithm=merge view v1 as
select b1, c2 from t2, t3 where b2 > c2;
create algorithm=merge view v2 as
select b1, c2 from t2, t3 group by b2, c2;
create algorithm=temptable view v1m as
select b1, c2 from t2, t3 where b2 > c2;
create algorithm=temptable view v2m as
select b1, c2 from t2, t3 group by b2, c2;
select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null);
select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null);
select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null);
select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null);
drop view v1, v2, v1m, v2m;
# nested subqueries, views
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
--replace_column 6 # 7 # 8 # 11 #
explain extended
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# as above with correlated innermost subquery
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# multiple levels of nesting subqueries, unions
--replace_column 6 # 7 # 8 # 11 #
explain extended
(select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')
group by b1, b2) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
(select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')
group by b1, b2) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
# UNION of subqueries as a subquery (thus it is not computed via materialization)
explain extended
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# as above, with a join conditon between the outer references
explain extended
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(c1, c2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
a1 = c1;
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(c1, c2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
a1 = c1;
/******************************************************************************
* Negative tests, where materialization should not be applied.
******************************************************************************/
# UNION in a subquery
explain extended
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
# correlation
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2));
# subquery has no tables
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');
explain extended
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
/******************************************************************************
* Subqueries in other uncovered clauses.
******************************************************************************/
/* SELECT clause */
select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1;
/* GROUP BY clause */
create table columns (col int key);
insert into columns values (1), (2);
explain extended
select * from t1 group by (select col from columns limit 1);
select * from t1 group by (select col from columns limit 1);
explain extended
select * from t1 group by (a1 in (select col from columns));
select * from t1 group by (a1 in (select col from columns));
/* ORDER BY clause */
explain extended
select * from t1 order by (select col from columns limit 1);
select * from t1 order by (select col from columns limit 1);
/******************************************************************************
* Column types/sizes that affect materialization.
******************************************************************************/
/*
Test that BLOBs are not materialized (except when arguments of some functions).
*/
# force materialization to be always considered
set @prefix_len = 6;
# BLOB == 16 (small blobs that could be stored in HEAP tables)
set @blob_len = 16;
set @suffix_len = @blob_len - @prefix_len;
create table t1_16 (a1 blob(16), a2 blob(16));
create table t2_16 (b1 blob(16), b2 blob(16));
create table t3_16 (c1 blob(16), c2 blob(16));
insert into t1_16 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512)
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
# BLOB column at the second (intermediate) level of nesting
explain extended
select * from t1
where concat(a1,'x') IN
(select left(a1,8) from t1_16
where (a1, a2) IN
(select t2_16.b1, t2_16.b2 from t2_16, t2
where t2.b2 = substring(t2_16.b2,1,6) and
t2.b1 IN (select c1 from t3 where c2 > '0')));
drop table t1_16, t2_16, t3_16;
# BLOB == 512 (CONVERT_IF_BIGGER_TO_BLOB == 512)
set @blob_len = 512;
set @suffix_len = @blob_len - @prefix_len;
create table t1_512 (a1 blob(512), a2 blob(512));
create table t2_512 (b1 blob(512), b2 blob(512));
create table t3_512 (c1 blob(512), c2 blob(512));
insert into t1_512 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512)
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
drop table t1_512, t2_512, t3_512;
# BLOB == 1024 (group_concat_max_len == 1024)
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
create table t3_1024 (c1 blob(1024), c2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1024)
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
drop table t1_1024, t2_1024, t3_1024;
# BLOB == 1025
set @blob_len = 1025;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1025 (a1 blob(1025), a2 blob(1025));
create table t2_1025 (b1 blob(1025), b2 blob(1025));
create table t3_1025 (c1 blob(1025), c2 blob(1025));
insert into t1_1025 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');
# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1025)
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
drop table t1_1025, t2_1025, t3_1025;
# test for BIT fields
create table t1bit (a1 bit(3), a2 bit(3));
create table t2bit (b1 bit(3), b2 bit(3));
insert into t1bit values (b'000', b'100');
insert into t1bit values (b'001', b'101');
insert into t1bit values (b'010', b'110');
insert into t2bit values (b'001', b'101');
insert into t2bit values (b'010', b'110');
insert into t2bit values (b'110', b'111');
explain extended select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
drop table t1bit, t2bit;
# test mixture of BIT and BLOB
create table t1bb (a1 bit(3), a2 blob(3));
create table t2bb (b1 bit(3), b2 blob(3));
insert into t1bb values (b'000', '100');
insert into t1bb values (b'001', '101');
insert into t1bb values (b'010', '110');
insert into t2bb values (b'001', '101');
insert into t2bb values (b'010', '110');
insert into t2bb values (b'110', '111');
explain extended select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);
select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);
drop table t1bb, t2bb;
drop table t1, t2, t3, t1i, t2i, t3i, columns;
/******************************************************************************
* Test the cache of the left operand of IN.
******************************************************************************/
# Test that default values of Cached_item are not used for comparison
create table t1 (s1 int);
create table t2 (s2 int);
insert into t1 values (5),(1),(0);
insert into t2 values (0), (1);
select s2 from t2 where s2 in (select s1 from t1);
drop table t1, t2;
create table t1 (a int not null, b int not null);
create table t2 (c int not null, d int not null);
create table t3 (e int not null);
# the first outer row has no matching inner row
insert into t1 values (1,10);
insert into t1 values (1,20);
insert into t1 values (2,10);
insert into t1 values (2,20);
insert into t1 values (2,30);
insert into t1 values (3,20);
insert into t1 values (4,40);
insert into t2 values (2,10);
insert into t2 values (2,20);
insert into t2 values (2,40);
insert into t2 values (3,20);
insert into t2 values (4,10);
insert into t2 values (5,10);
insert into t3 values (10);
insert into t3 values (10);
insert into t3 values (20);
insert into t3 values (30);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);
create index it1a on t1(a);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);
# the first outer row has a matching inner row
insert into t2 values (1,10);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);
# cacheing for IN predicates inside a having clause - here the cached
# items are changed to point to temporary tables.
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
select a from t1 group by a having a in (select c from t2 where d >= 20);
# create an index that can be used for the outer query GROUP BY
create index iab on t1(a, b);
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
select a from t1 group by a having a in (select c from t2 where d >= 20);
explain extended
select a from t1 group by a
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
select a from t1 group by a
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
explain extended
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
drop table t1, t2, t3;
#
# BUG#36133 "Assertion `exec_method != MATERIALIZATION || (exec_method == MATERIALIZATION &&"
#
create table t2 (a int, b int, key(a), key(b));
insert into t2 values (3,3),(3,3),(3,3);
select 1 from t2 where
t2.a > 1
or
t2.a = 3 and not t2.a not in (select t2.b from t2);
drop table t2;
#
# BUG#37896 Assertion on entry of Item_in_subselect::exec on subquery with AND NOT
#
create table t1 (a1 int key);
create table t2 (b1 int);
insert into t1 values (5);
# Query with group by, executed via materialization
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
# Query with group by, executed via IN=>EXISTS
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='default,materialization=off';
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
# Executed with materialization
set @@optimizer_switch='default,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
# Executed with semi-join. Notice, this time we get a different result (NULL).
# This is the only correct result of all four queries. This difference is
# filed as BUG#40037.
set @@optimizer_switch='default,materialization=off';
-- echo # with MariaDB and MWL#90, this particular case is solved:
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
-- echo # but when we go around MWL#90 code, the problem still shows up:
explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
set @@optimizer_switch= @save_optimizer_switch;
drop table t1,t2;
#
# BUG#36752 "subquery materialization produces wrong results when comparing different types"
#
create table t1 (a char(2), b varchar(10));
insert into t1 values ('a', 'aaa');
insert into t1 values ('aa', 'aaaa');
explain select a,b from t1 where b in (select a from t1);
select a,b from t1 where b in (select a from t1);
prepare st1 from "select a,b from t1 where b in (select a from t1)";
execute st1;
execute st1;
drop table t1;
#
# Bug #44303 Assertion failures in Field_new_decimal::store_decimal
# when executing materialized InsideOut semijoin
#
CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM;
INSERT INTO t1 (f1, f2) VALUES (1, 1.789);
INSERT INTO t1 (f1, f2) VALUES (13, 1.454);
INSERT INTO t1 (f1, f2) VALUES (10, 1.668);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1, 1.789);
INSERT INTO t2 VALUES (13, 1.454);
set @save_optimizer_switch=@@optimizer_switch;
SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
set @@optimizer_switch= @save_optimizer_switch;
DROP TABLE t1, t2;
#
# BUG#46548 IN-subqueries return 0 rows with materialization=on
#
CREATE TABLE t1 (
pk int,
a varchar(1),
b varchar(4),
c varchar(4),
d varchar(4),
PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
set @save_optimizer_switch=@@optimizer_switch;
SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
DROP TABLE t1, t2;
set optimizer_switch=@save_optimizer_switch;
--echo #
--echo # BUG#50019: Wrong result for IN-subquery with materialization
--echo #
create table t1(i int);
insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
create table t2(i int);
insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
create table t3(i int);
insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
set @save_optimizer_switch=@@optimizer_switch;
set session optimizer_switch='materialization=off,in_to_exists=on';
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
set session optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3;
#
# Test that the contents of the temp table of a materialized subquery is
# cleaned up between PS re-executions.
#
create table t0 (a int);
insert into t0 values (0),(1),(2);
create table t1 (a int);
insert into t1 values (0),(1),(2);
explain select a, a in (select a from t1) from t0;
select a, a in (select a from t1) from t0;
prepare s from 'select a, a in (select a from t1) from t0';
execute s;
update t1 set a=123;
execute s;
drop table t0, t1;
set optimizer_switch='firstmatch=on';
--echo #
--echo # MWL#90, review feedback: check what happens when the subquery
--echo # looks like candidate for MWL#90 checking at the first glance
--echo # but then subselect_hash_sj_engine::init_permanent() discovers
--echo # that it's not possible to perform duplicate removal for the
--echo # selected datatypes, and so materialization isn't applicable after
--echo # all.
--echo #
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
explain select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
drop table t1_1024, t2_1024;

99
mysql-test/t/subselect_sj_nonmerged.test Normal file
View file

@ -0,0 +1,99 @@
#
# Tests for non-merged semi-joins
#
--disable_warnings
drop table if exists t0, t1, t2, t3, t4;
--enable_warnings
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='materialization=on';
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
# Check the case of subquery having agggregates but not having grouping
create table t1 as select * from t0;
--echo # The following should use full scan on <subquery2> and it must scan 1 row:
explain select * from t0 where a in (select max(a) from t1);
select * from t0 where a in (select max(a) from t1);
# Ok, now check the trivial match/no-match/NULL on the left/NULL on the right cases
insert into t1 values (11);
select * from t0 where a in (select max(a) from t1);
delete from t1 where a=11;
insert into t0 values (NULL);
select * from t0 where a in (select max(a) from t1);
delete from t0 where a is NULL;
delete from t1;
select * from t0 where a in (select max(a) from t1);
insert into t0 values (NULL);
select * from t0 where a in (select max(a) from t1);
delete from t0 where a is NULL;
drop table t1;
#
# Try with join subqueries
#
create table t1 (a int, b int);
insert into t1 select a,a from t0; # 10 rows
create table t2 as select * from t1 where a<5; # 5 rows
create table t3 as select (A.a + 10*B.a) as a from t0 A, t0 B; # 100 rows
alter table t3 add primary key(a);
--echo # The following should have do a full scan on <subquery2> and scan 5 rows
--echo # (despite that subquery's join output estimate is 50 rows)
explain select * from t3 where a in (select max(t2.a) from t1, t2 group by t2.b);
--echo # Compare to this which really will have 50 record combinations:
explain select * from t3 where a in (select max(t2.a) from t1, t2 group by t2.b, t1.b);
--echo # Outer joins also work:
explain select * from t3
where a in (select max(t2.a) from t1 left join t2 on t1.a=t2.a group by t2.b, t1.b);
#
# Check if joins on the outer side also work
#
create table t4 (a int, b int, filler char(20), unique key(a,b));
insert into t4 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t0 A, t0 B; # 100 rows
explain select * from t0, t4 where
t4.b=t0.a and t4.a in (select max(t2.a) from t1, t2 group by t2.b);
insert into t4 select 100 + (B.a *100 + A.a), 100 + (B.a*100 + A.a), 'filler' from t4 A, t0 B;
explain select * from t4 where
t4.a in (select max(t2.a) from t1, t2 group by t2.b) and
t4.b in (select max(t2.a) from t1, t2 group by t2.b);
drop table t1,t2,t3,t4;
drop table t0;
--echo #
--echo # BUG#780359: Crash with get_fanout_with_deps in maria-5.3-mwl90
--echo #
CREATE TABLE t1 (f1 int);
INSERT INTO t1 VALUES (2),(2);
CREATE TABLE t2 (f3 int);
INSERT INTO t2 VALUES (2),(2);
SELECT *
FROM t1
WHERE ( f1 ) IN (
SELECT t2.f3
FROM t2
WHERE t2.f3 = 97
AND t2.f3 = 50
GROUP BY 1
);
DROP TABLE t1, t2;
set optimizer_switch=@save_optimizer_switch;

1
sql-bench/test-table-elimination.sh
View file

@ -1,3 +1,4 @@
#!@PERL@
# Test of table elimination feature

3
sql/item.h
View file

@ -1249,7 +1249,8 @@ public:
virtual Item_equal *find_item_equal(COND_EQUAL *cond_equal) { return NULL; }
/**
Set the join tab index to the minimal (left-most) JOIN_TAB to which this
Item is attached.
Item is attached. The number is an index is depth_first_tab() traversal
order.
*/
virtual void set_join_tab_idx(uint join_tab_idx_arg)
{

57
sql/item_cmpfunc.cc
View file

@ -5813,28 +5813,12 @@ Item* Item_equal::get_first(Item *field_item)
{
/*
It's a field from an materialized semi-join. We can substitute it only
for a field from the same semi-join.
for a field from the same semi-join. Find the first of such items.
*/
JOIN_TAB *first= field_tab;
JOIN *join= field_tab->join;
int tab_idx= field_tab - field_tab->join->join_tab;
DBUG_ASSERT(join->join_tab[tab_idx].table->map &
emb_nest->sj_inner_tables);
/* Find the first table of this semi-join nest */
for (int i= tab_idx-1; i >= (int)join->const_tables; i--)
{
if (join->join_tab[i].table->map & emb_nest->sj_inner_tables)
first= join->join_tab + i;
else
// Found first tab that doesn't belong to current SJ.
break;
}
/* Find an item to substitute for. */
while ((item= it++))
{
if (it.get_curr_field()->table->reginfo.join_tab >= first)
if (it.get_curr_field()->table->pos_in_table_list->embedding == emb_nest)
{
/*
If we found given field then return NULL to avoid unnecessary
@ -5846,33 +5830,28 @@ Item* Item_equal::get_first(Item *field_item)
}
else
{
#if TO_BE_DELETED
/*
The field is not in SJ-Materialization nest. We must return the first
field that's not embedded in a SJ-Materialization nest.
Example: suppose we have a join order:
field in the join order. The field may be inside a semi-join nest, i.e
a join order may look like this:
SJ-Mat(it1 it2) ot1 ot2
and equality ot2.col = ot1.col = it2.col
If we're looking for best substitute for 'ot2.col', we should pick
ot1.col and not it2.col, because when we run a join between ot1 and ot2
execution of SJ-Mat(...) has already finished and we can't rely on the
value of it*.*.
psergey-fix-fix: ^^ THAT IS INCORRECT ^^. Pick the first, whatever that
is.
where we're looking what to substitute ot2.col for. In this case we must
still return it1.col, here's a proof why:
First let's note that either it1.col or it2.col participates in
subquery's IN-equality. It can't be otherwise, because materialization is
only applicable to uncorrelated subqueries, so the only way we could
infer "it1.col=ot1.col" is from the IN-equality. Ok, so IN-eqality has
it1.col or it2.col on its inner side. it1.col is first such item in the
join order, so it's not possible for SJ-Mat to be
SJ-Materialization-lookup, it is SJ-Materialization-Scan. The scan part
of this strategy will unpack value of it1.col=it2.col into it1.col
(that's the first equal item inside the subquery), and we'll be able to
get it from there. qed.
*/
while ((item= it++))
{
Item_field *fld_item= (Item_field *) (item->real_item());
TABLE_LIST *emb_nest= fld_item->field->table->pos_in_table_list->embedding;
if (!emb_nest || !emb_nest->sj_mat_info ||
!emb_nest->sj_mat_info->is_used)
{
return item;
}
}
#endif
return equal_items.head();
}
// Shouldn't get here.

324
sql/item_subselect.cc
View file

@ -31,13 +31,14 @@
#include "mysql_priv.h"
#include "sql_select.h"
double get_post_group_estimate(JOIN* join, double join_op_rows);
Item_subselect::Item_subselect():
Item_result_field(), value_assigned(0), own_engine(TRUE),
thd(0), substitution(0),
expr_cache(0), engine(0), old_engine(0), used_tables_cache(0),
have_to_be_excluded(0), const_item_cache(1), inside_first_fix_fields(0),
done_first_fix_fields(FALSE), forced_const(FALSE), eliminated(FALSE),
Item_result_field(), value_assigned(0), own_engine(0), thd(0), old_engine(0),
used_tables_cache(0), have_to_be_excluded(0), const_item_cache(1),
inside_first_fix_fields(0), done_first_fix_fields(FALSE),
substitution(0), expr_cache(0), engine(0), forced_const(FALSE), eliminated(FALSE),
engine_changed(0), changed(0), is_correlated(FALSE)
{
DBUG_ENTER("Item_subselect::Item_subselect");
@ -238,13 +239,13 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref)
if (!(*ref)->fixed)
res= (*ref)->fix_fields(thd, ref);
goto end;
//psergey-merge: done_first_fix_fields= FALSE;
}
// Is it one field subselect?
if (engine->cols() > max_columns)
{
my_error(ER_OPERAND_COLUMNS, MYF(0), 1);
//psergey-merge: done_first_fix_fields= FALSE;
goto end;
}
fix_length_and_dec();
@ -262,6 +263,7 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref)
end:
done_first_fix_fields= FALSE;
inside_first_fix_fields= FALSE;
thd->where= save_where;
return res;
}
@ -556,6 +558,64 @@ bool Item_subselect::exec()
}
/*
int Item_subselect::optimize(double *out_rows, double *cost)
{
int res;
DBUG_ASSERT(0);
res= engine->optimize(out_rows, cost);
return res;
}
*/
int Item_in_subselect::optimize(double *out_rows, double *cost)
{
int res;
DBUG_ENTER("Item_in_subselect::optimize");
SELECT_LEX *save_select= thd->lex->current_select;
JOIN *join= unit->first_select()->join;
thd->lex->current_select= join->select_lex;
if ((res= join->optimize()))
DBUG_RETURN(res);
/* Calculate #rows and cost of join execution */
join->get_partial_cost_and_fanout(join->table_count - join->const_tables,
table_map(-1),
cost, out_rows);
/*
Adjust join output cardinality. There can be these cases:
- Have no GROUP BY and no aggregate funcs: we won't get into this
function because such join will be processed as a merged semi-join
(TODO: does it really mean we don't need to handle such cases here at
all? put ASSERT)
- Have no GROUP BY but have aggregate funcs: output is 1 record.
- Have GROUP BY and have (or not) aggregate funcs: need to adjust output
cardinality.
*/
thd->lex->current_select= save_select;
if (!join->group_list && !join->group_optimized_away &&
join->tmp_table_param.sum_func_count)
{
DBUG_PRINT("info",("Materialized join will have only 1 row (it has "
"aggregates but no GROUP BY"));
*out_rows= 1;
}
/* Now with grouping */
if (join->group_list)
{
DBUG_PRINT("info",("Materialized join has grouping, trying to estimate it"));
double output_rows= get_post_group_estimate(join, *out_rows);
DBUG_PRINT("info",("Got value of %g", output_rows));
*out_rows= output_rows;
}
DBUG_RETURN(res);
}
/**
Check if an expression cache is needed for this subquery
@ -865,9 +925,6 @@ Item_singlerow_subselect::select_transformer(JOIN *join)
void Item_singlerow_subselect::store(uint i, Item *item)
{
row[i]->store(item);
//psergey-merge: can do without that: row[i]->cache_value();
//psergey-backport-timours: ^ really, without that ^
//psergey-try-merge-again:
row[i]->cache_value();
}
@ -1089,7 +1146,9 @@ bool Item_in_subselect::test_limit(st_select_lex_unit *unit_arg)
Item_in_subselect::Item_in_subselect(Item * left_exp,
st_select_lex *select_lex):
Item_exists_subselect(), left_expr_cache(0), first_execution(TRUE),
optimizer(0), pushed_cond_guards(NULL), in_strategy(0), upper_item(0)
optimizer(0), pushed_cond_guards(NULL), in_strategy(0),
is_jtbm_merged(FALSE), is_flattenable_semijoin(FALSE),
upper_item(0)
{
DBUG_ENTER("Item_in_subselect::Item_in_subselect");
left_expr= left_exp;
@ -2415,7 +2474,8 @@ bool Item_in_subselect::setup_mat_engine()
if (!(mat_engine= new subselect_hash_sj_engine(thd, this, select_engine)))
DBUG_RETURN(TRUE);
if (mat_engine->init(&select_engine->join->fields_list))
if (mat_engine->init(&select_engine->join->fields_list,
engine->get_identifier()))
DBUG_RETURN(TRUE);
engine= mat_engine;
@ -2444,7 +2504,7 @@ bool Item_in_subselect::init_left_expr_cache()
An IN predicate might be evaluated in a query for which all tables have
been optimzied away.
*/
if (!outer_join || !outer_join->tables || !outer_join->tables_list)
if (!outer_join || !outer_join->table_count || !outer_join->tables_list)
return TRUE;
if (!(left_expr_cache= new List<Cached_item>))
@ -2829,9 +2889,9 @@ int subselect_single_select_engine::exec()
pushed down into the subquery. Those optimizations are ref[_or_null]
acceses. Change them to be full table scans.
*/
for (uint i=join->const_tables ; i < join->tables ; i++)
for (JOIN_TAB *tab= first_linear_tab(join, WITHOUT_CONST_TABLES); tab;
tab= next_linear_tab(join, tab, WITH_BUSH_ROOTS))
{
JOIN_TAB *tab=join->join_tab+i;
if (tab && tab->keyuse)
{
for (uint i= 0; i < tab->ref.key_parts; i++)
@ -3943,6 +4003,8 @@ bitmap_init_memroot(MY_BITMAP *map, uint n_bits, MEM_ROOT *mem_root)
reexecution.
@param tmp_columns the items that produce the data for the temp table
@param subquery_id subquery's identifier (to make "<subquery%d>" name for
EXPLAIN)
@details
- Create a temporary table to store the result of the IN subquery. The
@ -3958,7 +4020,7 @@ bitmap_init_memroot(MY_BITMAP *map, uint n_bits, MEM_ROOT *mem_root)
@retval FALSE otherwise
*/
bool subselect_hash_sj_engine::init(List<Item> *tmp_columns)
bool subselect_hash_sj_engine::init(List<Item> *tmp_columns, uint subquery_id)
{
select_union *result_sink;
/* Options to create_tmp_table. */
@ -3996,10 +4058,18 @@ bool subselect_hash_sj_engine::init(List<Item> *tmp_columns)
*/
if (!(result_sink= new select_materialize_with_stats))
DBUG_RETURN(TRUE);
char buf[32];
uint len= my_snprintf(buf, sizeof(buf), "<subquery%d>", subquery_id);
char *name;
if (!(name= (char*)thd->alloc(len + 1)))
DBUG_RETURN(TRUE);
memcpy(name, buf, len+1);
result_sink->get_tmp_table_param()->materialized_subquery= true;
if (result_sink->create_result_table(thd, tmp_columns, TRUE,
tmp_create_options,
"materialized subselect", TRUE))
name, TRUE))
DBUG_RETURN(TRUE);
tmp_table= result_sink->table;
@ -4092,13 +4162,14 @@ bool subselect_hash_sj_engine::make_semi_join_conds()
if (!(tmp_table_ref= (TABLE_LIST*) thd->alloc(sizeof(TABLE_LIST))))
DBUG_RETURN(TRUE);
tmp_table_ref->init_one_table("", "materialized subselect", TL_READ);
tmp_table_ref->init_one_table("", tmp_table->alias.c_ptr(), TL_READ);
tmp_table_ref->table= tmp_table;
context= new Name_resolution_context;
context->init();
context->first_name_resolution_table=
context->last_name_resolution_table= tmp_table_ref;
semi_join_conds_context= context;
for (uint i= 0; i < item_in->left_expr->cols(); i++)
{
@ -4227,6 +4298,223 @@ void subselect_hash_sj_engine::cleanup()
}
/*
Get fanout produced by tables specified in the table_map
*/
double get_fanout_with_deps(JOIN *join, table_map tset)
{
/* Handle the case of "Impossible WHERE" */
if (join->table_count == 0)
return 0.0;
/* First, recursively get all tables we depend on */
table_map deps_to_check= tset;
table_map checked_deps= 0;
table_map further_deps;
do
{
further_deps= 0;
Table_map_iterator tm_it(deps_to_check);
int tableno;
while ((tableno = tm_it.next_bit()) != Table_map_iterator::BITMAP_END)
{
/* get tableno's dependency tables that are not in needed_set */
further_deps |= join->map2table[tableno]->ref.depend_map & ~checked_deps;
}
checked_deps |= deps_to_check;
deps_to_check= further_deps;
} while (further_deps != 0);
/* Now, walk the join order and calculate the fanout */
double fanout= 1;
for (JOIN_TAB *tab= first_top_level_tab(join, WITHOUT_CONST_TABLES); tab;
tab= next_top_level_tab(join, tab))
{
if ((tab->table->map & checked_deps) && !tab->emb_sj_nest &&
tab->records_read != 0)
{
fanout *= rows2double(tab->records_read);
}
}
return fanout;
}
#if 0
void check_out_index_stats(JOIN *join)
{
ORDER *order;
uint n_order_items;
/*
First, collect the keys that we can use in each table.
We can use a key if
- all tables refer to it.
*/
key_map key_start_use[MAX_TABLES];
key_map key_infix_use[MAX_TABLES];
table_map key_used=0;
table_map non_key_used= 0;
bzero(&key_start_use, sizeof(key_start_use)); //psergey-todo: safe initialization!
bzero(&key_infix_use, sizeof(key_infix_use));
for (order= join->group_list; order; order= order->next)
{
Item *item= order->item[0];
if (item->real_type() == Item::FIELD_ITEM)
{
if (item->used_tables() & OUTER_REF_TABLE_BIT)
continue; /* outside references are like constants for us */
Field *field= ((Item_field*)item->real_item())->field;
uint table_no= field->table->tablenr;
if (!(non_key_used && table_map(1) << table_no) &&
!field->part_of_key.is_clear_all())
{
key_map infix_map= field->part_of_key;
infix_map.subtract(field->key_start);
key_start_use[table_no].merge(field->key_start);
key_infix_use[table_no].merge(infix_map);
key_used |= table_no;
}
continue;
}
/*
Note: the below will cause clauses like GROUP BY YEAR(date) not to be
handled.
*/
non_key_used |= item->used_tables();
}
Table_map_iterator tm_it(key_used & ~non_key_used);
int tableno;
while ((tableno = tm_it.next_bit()) != Table_map_iterator::BITMAP_END)
{
key_map::iterator key_it(key_start_use);
int keyno;
while ((keyno = tm_it.next_bit()) != key_map::iterator::BITMAP_END)
{
for (order= join->group_list; order; order= order->next)
{
Item *item= order->item[0];
if (item->used_tables() & (table_map(1) << tableno))
{
DBUG_ASSERT(item->real_type() == Item::FIELD_ITEM);
}
}
/*
if (continuation)
{
walk through list and find which key parts are occupied;
// note that the above can't be made any faster.
}
else
use rec_per_key[0];
find out the cardinality.
check if cardinality decreases if we use it;
*/
}
}
}
#endif
/*
Get an estimate of how many records will be produced after the GROUP BY
operation.
@param join Join we're operating on
@param join_op_rows How many records will be produced by the join
operations (this is what join optimizer produces)
@seealso
See also optimize_semijoin_nests(), grep for "Adjust output cardinality
estimates". Very similar code there that is not joined with this one
because we operate on different data structs and too much effort is
needed to abstract them out.
@return
Number of records we expect to get after the GROUP BY operation
*/
double get_post_group_estimate(JOIN* join, double join_op_rows)
{
table_map tables_in_group_list= table_map(0);
/* Find out which tables are used in GROUP BY list */
for (ORDER *order= join->group_list; order; order= order->next)
{
Item *item= order->item[0];
if (item->used_tables() & RAND_TABLE_BIT)
{
/* Each join output record will be in its own group */
return join_op_rows;
}
tables_in_group_list|= item->used_tables();
}
tables_in_group_list &= ~PSEUDO_TABLE_BITS;
/*
Use join fanouts to calculate the max. number of records in the group-list
*/
double fanout_rows[MAX_KEY];
bzero(&fanout_rows, sizeof(fanout_rows));
double out_rows;
out_rows= get_fanout_with_deps(join, tables_in_group_list);
#if 0
/* The following will be needed when making use of index stats: */
/*
Also generate max. number of records for each of the tables mentioned
in the group-list. We'll use that a baseline number that we'll try to
reduce by using
- #table-records
- index statistics.
*/
Table_map_iterator tm_it(tables_in_group_list);
int tableno;
while ((tableno = tm_it.next_bit()) != Table_map_iterator::BITMAP_END)
{
fanout_rows[tableno]= get_fanout_with_deps(join, table_map(1) << tableno);
}
/*
Try to bring down estimates using index statistics.
*/
//check_out_index_stats(join);
#endif
return out_rows;
}
/*
Optimize the underlying subselect's join
@param out_rows OUT How many records we expect to get in the
materialized table
@param cost OUT Cost to materialize the subquery
@return
0 OK
1 Fatal error
*/
#if 0
int subselect_hash_sj_engine::optimize(double *out_rows, double *cost)
{
DBUG_ENTER("subselect_hash_sj_engine::optimize");
DBUG_ASSERT(0);
DBUG_RETURN(0);
}
#endif
/**
Execute a subquery IN predicate via materialization.

164
sql/item_subselect.h
View file

@ -37,26 +37,6 @@ class Item_subselect :public Item_result_field
protected:
/* thread handler, will be assigned in fix_fields only */
THD *thd;
/*
Used inside Item_subselect::fix_fields() according to this scenario:
> Item_subselect::fix_fields
> engine->prepare
> child_join->prepare
(Here we realize we need to do the rewrite and set
substitution= some new Item, eg. Item_in_optimizer )
< child_join->prepare
< engine->prepare
*ref= substitution;
< Item_subselect::fix_fields
*/
Item *substitution;
public:
/* unit of subquery */
st_select_lex_unit *unit;
protected:
Item *expr_cache;
/* engine that perform execution of subselect (single select or union) */
subselect_engine *engine;
/* old engine if engine was changed */
subselect_engine *old_engine;
/* cache of used external tables */
@ -72,6 +52,26 @@ protected:
bool inside_first_fix_fields;
bool done_first_fix_fields;
public:
/*
Used inside Item_subselect::fix_fields() according to this scenario:
> Item_subselect::fix_fields
> engine->prepare
> child_join->prepare
(Here we realize we need to do the rewrite and set
substitution= some new Item, eg. Item_in_optimizer )
< child_join->prepare
< engine->prepare
*ref= substitution;
substitution= NULL;
< Item_subselect::fix_fields
*/
Item *substitution;
/* unit of subquery */
st_select_lex_unit *unit;
Item *expr_cache;
/* engine that perform execution of subselect (single select or union) */
subselect_engine *engine;
/*
Set to TRUE if at optimization or execution time we determine that this
item's value is a constant. We need this member because it is not possible
@ -79,7 +79,6 @@ protected:
*/
bool forced_const;
public:
/* A reference from inside subquery predicate to somewhere outside of it */
class Ref_to_outside : public Sql_alloc
{
@ -161,6 +160,7 @@ public:
bool mark_as_dependent(THD *thd, st_select_lex *select, Item *item);
void fix_after_pullout(st_select_lex *new_parent, Item **ref);
void recalc_used_tables(st_select_lex *new_parent, bool after_pullout);
//virtual int optimize(double *out_rows, double *cost);
virtual bool exec();
/*
If subquery optimization or execution determines that the subquery has
@ -348,6 +348,8 @@ public:
};
TABLE_LIST * const NO_JOIN_NEST=(TABLE_LIST*)0x1;
/*
Possible methods to execute an IN predicate. These are set by the optimizer
based on user-set optimizer switches, semantic analysis and cost comparison.
@ -393,9 +395,11 @@ protected:
all JOIN in UNION
*/
Item *expr;
Item_in_optimizer *optimizer;
bool was_null;
bool abort_on_null;
public:
Item_in_optimizer *optimizer;
protected:
/* Used to trigger on/off conditions that were pushed down to subselect */
bool *pushed_cond_guards;
Comp_creator *func;
@ -419,19 +423,13 @@ public:
/*
Used by subquery optimizations to keep track about in which clause this
subquery predicate is located:
(TABLE_LIST*) 1 - the predicate is an AND-part of the WHERE
NO_JOIN_NEST - the predicate is an AND-part of the WHERE
join nest pointer - the predicate is an AND-part of ON expression
of a join nest
NULL - for all other locations
See also THD::emb_on_expr_nest.
*/
TABLE_LIST *emb_on_expr_nest;
/*
Location of the subquery predicate. It is either
- pointer to join nest if the subquery predicate is in the ON expression
- (TABLE_LIST*)1 if the predicate is in the WHERE.
*/
TABLE_LIST *expr_join_nest;
/*
Types of left_expr and subquery's select list allow to perform subquery
materialization. Currently, we set this to FALSE when it as well could
@ -443,10 +441,31 @@ public:
Same as above, but they also allow to scan the materialized table.
*/
bool sjm_scan_allowed;
double jtbm_read_time;
double jtbm_record_count;
/* A bitmap of possible execution strategies for an IN predicate. */
uchar in_strategy;
bool is_jtbm_merged;
/*
TRUE<=>this is a flattenable semi-join, false overwise.
*/
bool is_flattenable_semijoin;
/*
Used to determine how this subselect item is represented in the item tree,
in case there is a need to locate it there and replace with something else.
Two options are possible:
1. This item is there 'as-is'.
1. This item is wrapped within Item_in_optimizer.
*/
Item *original_item()
{
return is_flattenable_semijoin ? (Item*)this : (Item*)optimizer;
}
bool *get_cond_guard(int i)
{
return pushed_cond_guards ? pushed_cond_guards + i : NULL;
@ -463,8 +482,9 @@ public:
Item_in_subselect(Item * left_expr, st_select_lex *select_lex);
Item_in_subselect()
:Item_exists_subselect(), left_expr_cache(0), first_execution(TRUE),
optimizer(0), abort_on_null(0),
abort_on_null(0), optimizer(0),
pushed_cond_guards(NULL), func(NULL), in_strategy(SUBS_NOT_TRANSFORMED),
is_jtbm_merged(FALSE),
upper_item(0)
{}
void cleanup();
@ -501,6 +521,7 @@ public:
void set_first_execution() { if (first_execution) first_execution= FALSE; }
bool expr_cache_is_needed(THD *thd);
int optimize(double *out_rows, double *cost);
/*
Return the identifier that we could use to identify the subquery for the
user.
@ -572,6 +593,7 @@ public:
THD * get_thd() { return thd; }
virtual int prepare()= 0;
virtual void fix_length_and_dec(Item_cache** row)= 0;
//virtual int optimize(double *out_rows, double *cost) { DBUG_ASSERT(0); return 0; }
/*
Execute the engine
@ -808,7 +830,7 @@ inline bool Item_subselect::is_uncacheable() const
class subselect_hash_sj_engine : public subselect_engine
{
protected:
public:
/* The table into which the subquery is materialized. */
TABLE *tmp_table;
/* TRUE if the subquery was materialized into a temp table. */
@ -820,63 +842,35 @@ protected:
of subselect_single_select_engine::[prepare | cols].
*/
subselect_single_select_engine *materialize_engine;
/* The engine used to compute the IN predicate. */
subselect_engine *lookup_engine;
/*
QEP to execute the subquery and materialize its result into a
temporary table. Created during the first call to exec().
*/
JOIN *materialize_join;
/* Keyparts of the only non-NULL composite index in a rowid merge. */
MY_BITMAP non_null_key_parts;
/* Keyparts of the single column indexes with NULL, one keypart per index. */
MY_BITMAP partial_match_key_parts;
uint count_partial_match_columns;
uint count_null_only_columns;
/*
A conjunction of all the equality condtions between all pairs of expressions
that are arguments of an IN predicate. We need these to post-filter some
IN results because index lookups sometimes match values that are actually
not equal to the search key in SQL terms.
*/
*/
Item_cond_and *semi_join_conds;
/* Possible execution strategies that can be used to compute hash semi-join.*/
enum exec_strategy {
UNDEFINED,
COMPLETE_MATCH, /* Use regular index lookups. */
PARTIAL_MATCH, /* Use some partial matching strategy. */
PARTIAL_MATCH_MERGE, /* Use partial matching through index merging. */
PARTIAL_MATCH_SCAN, /* Use partial matching through table scan. */
IMPOSSIBLE /* Subquery materialization is not applicable. */
};
/* The chosen execution strategy. Computed after materialization. */
exec_strategy strategy;
protected:
exec_strategy get_strategy_using_schema();
exec_strategy get_strategy_using_data();
ulonglong rowid_merge_buff_size(bool has_non_null_key,
bool has_covering_null_row,
MY_BITMAP *partial_match_key_parts);
void choose_partial_match_strategy(bool has_non_null_key,
bool has_covering_null_row,
MY_BITMAP *partial_match_key_parts);
bool make_semi_join_conds();
subselect_uniquesubquery_engine* make_unique_engine();
Name_resolution_context *semi_join_conds_context;
public:
subselect_hash_sj_engine(THD *thd, Item_subselect *in_predicate,
subselect_single_select_engine *old_engine)
:subselect_engine(thd, in_predicate, NULL), tmp_table(NULL),
is_materialized(FALSE), materialize_engine(old_engine), lookup_engine(NULL),
materialize_join(NULL), count_partial_match_columns(0),
count_null_only_columns(0), semi_join_conds(NULL), strategy(UNDEFINED)
: subselect_engine(thd, in_predicate, NULL),
tmp_table(NULL), is_materialized(FALSE), materialize_engine(old_engine),
materialize_join(NULL), semi_join_conds(NULL), lookup_engine(NULL),
count_partial_match_columns(0), count_null_only_columns(0),
strategy(UNDEFINED)
{}
~subselect_hash_sj_engine();
bool init(List<Item> *tmp_columns);
bool init(List<Item> *tmp_columns, uint subquery_id);
void cleanup();
int prepare();
//int optimize(double *out_rows, double *cost);
int exec();
virtual void print(String *str, enum_query_type query_type);
uint cols()
@ -898,6 +892,38 @@ public:
select_result_interceptor *result,
bool temp= FALSE);
bool no_tables();//=>base class
protected:
/* The engine used to compute the IN predicate. */
subselect_engine *lookup_engine;
/* Keyparts of the only non-NULL composite index in a rowid merge. */
MY_BITMAP non_null_key_parts;
/* Keyparts of the single column indexes with NULL, one keypart per index. */
MY_BITMAP partial_match_key_parts;
uint count_partial_match_columns;
uint count_null_only_columns;
/* Possible execution strategies that can be used to compute hash semi-join.*/
enum exec_strategy {
UNDEFINED,
COMPLETE_MATCH, /* Use regular index lookups. */
PARTIAL_MATCH, /* Use some partial matching strategy. */
PARTIAL_MATCH_MERGE, /* Use partial matching through index merging. */
PARTIAL_MATCH_SCAN, /* Use partial matching through table scan. */
IMPOSSIBLE /* Subquery materialization is not applicable. */
};
/* The chosen execution strategy. Computed after materialization. */
exec_strategy strategy;
exec_strategy get_strategy_using_schema();
exec_strategy get_strategy_using_data();
ulonglong rowid_merge_buff_size(bool has_non_null_key,
bool has_covering_null_row,
MY_BITMAP *partial_match_key_parts);
void choose_partial_match_strategy(bool has_non_null_key,
bool has_covering_null_row,
MY_BITMAP *partial_match_key_parts);
bool make_semi_join_conds();
subselect_uniquesubquery_engine* make_unique_engine();
};

12
sql/opt_range.cc
View file

@ -341,8 +341,9 @@ public:
SEL_ARG(Field *field, uint8 part, uchar *min_value, uchar *max_value,
uint8 min_flag, uint8 max_flag, uint8 maybe_flag);
SEL_ARG(enum Type type_arg)
:min_flag(0),elements(1),use_count(1),left(0),right(0),next_key_part(0),
color(BLACK), type(type_arg)
:min_flag(0), max_part_no(0) /* first key part means 1. 0 mean 'no parts'*/,
elements(1),use_count(1),left(0),right(0),
next_key_part(0), color(BLACK), type(type_arg)
{}
inline bool is_same(SEL_ARG *arg)
{
@ -2926,7 +2927,8 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use,
quick=0;
needed_reg.clear_all();
quick_keys.clear_all();
if (keys_to_use.is_clear_all())
DBUG_ASSERT(!head->is_filled_at_execution());
if (keys_to_use.is_clear_all() || head->is_filled_at_execution())
DBUG_RETURN(0);
records= head->file->stats.records;
if (!records)
@ -4344,7 +4346,7 @@ double get_sweep_read_cost(const PARAM *param, ha_rows records)
return 1;
*/
JOIN *join= param->thd->lex->select_lex.join;
if (!join || join->tables == 1)
if (!join || join->table_count == 1)
{
/* No join, assume reading is done in one 'sweep' */
result= busy_blocks*(DISK_SEEK_BASE_COST +
@ -11287,7 +11289,7 @@ get_best_group_min_max(PARAM *param, SEL_TREE *tree)
/* Perform few 'cheap' tests whether this access method is applicable. */
if (!join)
DBUG_RETURN(NULL); /* This is not a select statement. */
if ((join->tables != 1) || /* The query must reference one table. */
if ((join->table_count != 1) || /* The query must reference one table. */
((!join->group_list) && /* Neither GROUP BY nor a DISTINCT query. */
(!join->select_distinct)) ||
(join->select_lex->olap == ROLLUP_TYPE)) /* Check (B3) for ROLLUP */

757
sql/opt_subselect.cc
View file

File diff suppressed because it is too large Load diff

10
sql/opt_subselect.h
View file

@ -1,4 +1,6 @@
/* */
/*
Semi-join subquery optimization code definitions
*/
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
@ -366,4 +368,10 @@ int clear_sj_tmp_tables(JOIN *join);
int rewrite_to_index_subquery_engine(JOIN *join);
void get_delayed_table_estimates(TABLE *table,
ha_rows *out_rows,
double *scan_time,
double *startup_cost);
enum_nested_loop_state join_tab_execution_startup(JOIN_TAB *tab);

30
sql/sql_base.cc
View file

@ -7759,7 +7759,6 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
table_list= table_list->next_leaf, tablenr++)
{
TABLE *table= table_list->table;
table->pos_in_table_list= table_list;
if (first_select_table &&
table_list->top_table() == first_select_table)
{
@ -7767,9 +7766,19 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
first_select_table= 0;
tablenr= 0;
}
setup_table_map(table, table_list, tablenr);
if (table_list->process_index_hints(table))
DBUG_RETURN(1);
if (table_list->jtbm_subselect)
{
table_list->jtbm_table_no= tablenr;
}
else
{
table->pos_in_table_list= table_list;
setup_table_map(table, table_list, tablenr);
if (table_list->process_index_hints(table))
DBUG_RETURN(1);
}
}
if (tablenr > MAX_TABLES)
{
@ -7796,6 +7805,17 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
if (res)
DBUG_RETURN(1);
}
if (table_list->jtbm_subselect)
{
Item *item= table_list->jtbm_subselect->optimizer;
if (table_list->jtbm_subselect->optimizer->fix_fields(thd, &item))
{
my_error(ER_TOO_MANY_TABLES,MYF(0),MAX_TABLES); /* psergey-todo: WHY ER_TOO_MANY_TABLES ???*/
DBUG_RETURN(1);
}
DBUG_ASSERT(item == table_list->jtbm_subselect->optimizer);
}
}
/* Precompute and store the row types of NATURAL/USING joins. */
@ -8217,7 +8237,7 @@ int setup_conds(THD *thd, TABLE_LIST *tables, TABLE_LIST *leaves,
goto err_no_arena;
}
thd->thd_marker.emb_on_expr_nest= (TABLE_LIST*)1;
thd->thd_marker.emb_on_expr_nest= NO_JOIN_NEST;
if (*conds)
{
thd->where="where clause";

18
sql/sql_cursor.cc
View file

@ -363,7 +363,6 @@ Sensitive_cursor::open(JOIN *join_arg)
join= join_arg;
THD *thd= join->thd;
/* First non-constant table */
JOIN_TAB *join_tab= join->join_tab + join->const_tables;
DBUG_ENTER("Sensitive_cursor::open");
join->change_result(result);
@ -381,26 +380,29 @@ Sensitive_cursor::open(JOIN *join_arg)
/* Prepare JOIN for reading rows. */
join->tmp_table= 0;
join->join_tab[join->tables-1].next_select= setup_end_select_func(join);
join->join_tab[join->top_join_tab_count - 1].next_select= setup_end_select_func(join);
join->send_records= 0;
join->fetch_limit= join->unit->offset_limit_cnt;
/* Disable JOIN CACHE as it is not working with cursors yet */
for (JOIN_TAB *tab= join_tab;
tab != join->join_tab + join->tables - 1;
tab++)
for (JOIN_TAB *tab= first_linear_tab(join, WITHOUT_CONST_TABLES);
tab != join->join_tab + join->top_join_tab_count - 1;
tab= next_linear_tab(join, tab, WITH_BUSH_ROOTS))
{
if (tab->next_select == sub_select_cache)
tab->next_select= sub_select;
}
DBUG_ASSERT(join_tab->table->reginfo.not_exists_optimize == 0);
DBUG_ASSERT(join_tab->not_used_in_distinct == 0);
#ifndef DBUG_OFF
JOIN_TAB *first_tab= first_linear_tab(join, WITHOUT_CONST_TABLES);
DBUG_ASSERT(first_tab->table->reginfo.not_exists_optimize == 0);
DBUG_ASSERT(first_tab->not_used_in_distinct == 0);
/*
null_row is set only if row not found and it's outer join: should never
happen for the first table in join_tab list
*/
DBUG_ASSERT(join_tab->table->null_row == 0);
DBUG_ASSERT(first_tab->table->null_row == 0);
#endif
DBUG_RETURN(0);
}

7
sql/sql_delete.cc
View file

@ -681,9 +681,10 @@ multi_delete::initialize_tables(JOIN *join)
walk= delete_tables;
for (JOIN_TAB *tab=join->join_tab, *end=join->join_tab+join->tables;
tab < end;
tab++)
for (JOIN_TAB *tab= first_linear_tab(join, WITH_CONST_TABLES);
tab;
tab= next_linear_tab(join, tab, WITH_BUSH_ROOTS))
{
if (tab->table->map & tables_to_delete_from)
{

219
sql/sql_join_cache.cc
View file

@ -33,6 +33,7 @@
#define NO_MORE_RECORDS_IN_BUFFER (uint)(-1)
static void save_or_restore_used_tabs(JOIN_TAB *join_tab, bool save);
/*****************************************************************************
* Join cache module
@ -138,52 +139,6 @@ uint add_table_data_fields_to_join_cache(JOIN_TAB *tab,
return len;
}
/*
Get the next table whose records are stored in the join buffer of this cache
SYNOPSIS
get_next_table()
tab the table for which the next table is to be returned
DESCRIPTION
For a given table whose records are stored in this cache the function
returns the next such table if there is any.
The function takes into account that the tables whose records are
are stored in the same cache now can interleave with tables from
materialized semijoin subqueries.
TODO
This function should be modified/simplified after the new code for
materialized semijoins is merged.
RETURN
The next join table whose records are stored in the buffer of this cache
if such table exists, 0 - otherwise
*/
JOIN_TAB *JOIN_CACHE::get_next_table(JOIN_TAB *tab)
{
if (++tab == join_tab)
return NULL;
if (join_tab->first_sjm_sibling)
return tab;
uint i= tab-join->join_tab;
/*
Temporary measure before MWL#90 refactorings are there: if 'tab' is at upper
level (i.e. it's not inside an SJM nest), still include into the join buffer
the tables from within SJM nest. We might need the subquery's select list
columns, because SJ-Materialization-Scan upacks data to those.
while (sj_is_materialize_strategy(join->best_positions[i].sj_strategy) &&
i < join->tables)
i+= join->best_positions[i].n_sj_tables;
*/
return join->join_tab+i < join_tab ? join->join_tab+i : NULL;
}
/*
Determine different counters of fields associated with a record in the cache
@ -203,12 +158,55 @@ JOIN_TAB *JOIN_CACHE::get_next_table(JOIN_TAB *tab)
void JOIN_CACHE::calc_record_fields()
{
JOIN_TAB *tab = prev_cache ? prev_cache->join_tab :
(join_tab->first_sjm_sibling ?
join_tab->first_sjm_sibling :
join->join_tab+join->const_tables);
tables= join_tab-tab;
JOIN_TAB *tab;
if (prev_cache)
tab= prev_cache->join_tab;
else
{
if (join_tab->bush_root_tab)
{
/*
--ot1--SJM1--------------ot2--...
|
|
+-it1--...--itN
^____________ this->join_tab is somewhere here,
inside an sjm nest.
The join buffer should store the values of it1.*, it2.*, ..
It should not store values of ot1.*.
*/
tab= join_tab->bush_root_tab->bush_children->start;
}
else
{
/*
-ot1--ot2--SJM1--SJM2--------------ot3--...--otN
| | ^
| +-it21--...--it2N |
| \-- we're somewhere here,
+-it11--...--it1N at the top level
The join buffer should store the values of
ot1.*, ot2.*, it1{i}, it2{j}.*, ot3.*, ...
that is, we should start from the first non-const top-level table.
We will need to store columns of SJ-inner tables (it_X_Y.*), but we're
not interested in storing the columns of materialization tables
themselves. Beause of that, if the first non-const top-level table is a
materialized table, we move to its bush_children:
*/
tab= join->join_tab + join->const_tables;
if (tab->bush_children)
tab= tab->bush_children->start;
}
}
DBUG_ASSERT(!tab->bush_children);
start_tab= tab;
fields= 0;
blobs= 0;
flag_fields= 0;
@ -216,7 +214,11 @@ void JOIN_CACHE::calc_record_fields()
data_field_ptr_count= 0;
referenced_fields= 0;
for ( ; tab ; tab= get_next_table(tab))
/*
The following loop will get inside SJM nests, because data may be unpacked
to sjm-inner tables.
*/
for (; tab != join_tab ; tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
tab->calc_used_field_length(FALSE);
flag_fields+= test(tab->used_null_fields || tab->used_uneven_bit_fields);
@ -245,7 +247,8 @@ void JOIN_CACHE::calc_record_fields()
that occur in the ref expressions and marks these fields in the bitmap
tab->table->tmp_set. The function counts the number of them stored
in this cache and the total number of them stored in the previous caches
and saves the results of the counting in 'local_key_arg_fields' and 'external_key_arg_fields' respectively.
and saves the results of the counting in 'local_key_arg_fields' and
'external_key_arg_fields' respectively.
NOTES
The function does not do anything if no key is used to join the records
@ -269,8 +272,8 @@ void JOIN_CACHE::collect_info_on_key_args()
cache= this;
do
{
for (tab= cache->join_tab-cache->tables; tab ;
tab= cache->get_next_table(tab))
for (tab= cache->start_tab; tab != cache->join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
uint key_args;
bitmap_clear_all(&tab->table->tmp_set);
@ -386,7 +389,8 @@ void JOIN_CACHE::create_flag_fields()
&copy);
/* Create fields for all null bitmaps and null row flags that are needed */
for (tab= join_tab-tables; tab; tab= get_next_table(tab))
for (tab= start_tab; tab != join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
TABLE *table= tab->table;
@ -473,8 +477,8 @@ void JOIN_CACHE::create_key_arg_fields()
while (ext_key_arg_cnt)
{
cache= cache->prev_cache;
for (tab= cache->join_tab-cache->tables; tab;
tab= cache->get_next_table(tab))
for (tab= cache->start_tab; tab != cache->join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
CACHE_FIELD *copy_end;
MY_BITMAP *key_read_set= &tab->table->tmp_set;
@ -524,7 +528,8 @@ void JOIN_CACHE::create_key_arg_fields()
/* Now create local fields that are used to build ref for this key access */
copy= field_descr+flag_fields;
for (tab= join_tab-tables; tab; tab= get_next_table(tab))
for (tab= start_tab; tab != join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
length+= add_table_data_fields_to_join_cache(tab, &tab->table->tmp_set,
&data_field_count, &copy,
@ -573,14 +578,15 @@ void JOIN_CACHE::create_key_arg_fields()
none
*/
void JOIN_CACHE:: create_remaining_fields()
void JOIN_CACHE::create_remaining_fields()
{
JOIN_TAB *tab;
bool all_read_fields= !is_key_access();
CACHE_FIELD *copy= field_descr+flag_fields+data_field_count;
CACHE_FIELD **copy_ptr= blob_ptr+data_field_ptr_count;
for (tab= join_tab-tables; tab; tab= get_next_table(tab))
for (tab= start_tab; tab != join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
MY_BITMAP *rem_field_set;
TABLE *table= tab->table;
@ -737,8 +743,11 @@ ulong JOIN_CACHE::get_min_join_buffer_size()
if (!min_buff_size)
{
size_t len= 0;
for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++)
for (JOIN_TAB *tab= start_tab; tab != join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
len+= tab->get_max_used_fieldlength();
}
len+= get_record_max_affix_length() + get_max_key_addon_space_per_record();
size_t min_sz= len*min_records;
size_t add_sz= 0;
@ -790,8 +799,11 @@ ulong JOIN_CACHE::get_max_join_buffer_size(bool optimize_buff_size)
size_t max_sz;
size_t min_sz= get_min_join_buffer_size();
size_t len= 0;
for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++)
for (JOIN_TAB *tab= start_tab; tab != join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
len+= tab->get_used_fieldlength();
}
len+= get_record_max_affix_length();
avg_record_length= len;
len+= get_max_key_addon_space_per_record() + avg_aux_buffer_incr;
@ -865,7 +877,9 @@ int JOIN_CACHE::alloc_buffer()
set_if_bigger(max_records, 10);
min_buff_size= get_min_join_buffer_size();
buff_size= get_max_join_buffer_size(optimize_buff_size);
for (tab= join->join_tab+join->const_tables; tab <= join_tab; tab++)
for (tab= start_tab; tab!= join_tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
cache= tab->cache;
if (cache)
@ -2154,10 +2168,19 @@ enum_nested_loop_state JOIN_CACHE::join_matching_records(bool skip_last)
join_tab->select->quick= 0;
}
/* Prepare to retrieve all records of the joined table */
if ((error= join_tab_scan->open()))
goto finish; /* psergey-note: if this returns error, we will assert in net_send_statement() */
if ((rc= join_tab_execution_startup(join_tab)) < 0)
goto finish2;
/* Prepare to retrieve all records of the joined table */
if ((error= join_tab_scan->open()))
{
/*
TODO: if we get here, we will assert in net_send_statement(). Add test
coverage and fix.
*/
goto finish;
}
while (!(error= join_tab_scan->next()))
{
if (join->thd->killed)
@ -2199,6 +2222,7 @@ enum_nested_loop_state JOIN_CACHE::join_matching_records(bool skip_last)
finish:
if (error)
rc= error < 0 ? NESTED_LOOP_NO_MORE_ROWS: NESTED_LOOP_ERROR;
finish2:
join_tab_scan->close();
return rc;
}
@ -3219,12 +3243,7 @@ uint JOIN_CACHE_HASHED::get_next_key(uchar ** key)
int JOIN_TAB_SCAN::open()
{
JOIN_TAB *bound= join_tab-cache->tables;
for (JOIN_TAB *tab= join_tab-1; tab != bound && !tab->cache; tab--)
{
tab->status= tab->table->status;
tab->table->status= 0;
}
save_or_restore_used_tabs(join_tab, FALSE);
is_first_record= TRUE;
return join_init_read_record(join_tab);
}
@ -3279,6 +3298,49 @@ int JOIN_TAB_SCAN::next()
}
/*
Walk back in join order from join_tab until we encounter a join tab with
tab->cache!=NULL, and save/restore tab->table->status along the way.
@param save TRUE save
FALSE restore
*/
static void save_or_restore_used_tabs(JOIN_TAB *join_tab, bool save)
{
JOIN_TAB *first= join_tab->bush_root_tab?
join_tab->bush_root_tab->bush_children->start :
join_tab->join->join_tab + join_tab->join->const_tables;
for (JOIN_TAB *tab= join_tab-1; tab != first && !tab->cache; tab--)
{
if (tab->bush_children)
{
for (JOIN_TAB *child= tab->bush_children->start;
child != tab->bush_children->end;
child++)
{
if (save)
child->table->status= child->status;
else
{
tab->status= tab->table->status;
tab->table->status= 0;
}
}
}
if (save)
tab->table->status= tab->status;
else
{
tab->status= tab->table->status;
tab->table->status= 0;
}
}
}
/*
Perform finalizing actions for a scan over the table records
@ -3295,9 +3357,7 @@ int JOIN_TAB_SCAN::next()
void JOIN_TAB_SCAN::close()
{
JOIN_TAB *bound= join_tab-cache->tables;
for (JOIN_TAB *tab= join_tab-1; tab != bound && !tab->cache; tab--)
tab->table->status= tab->status;
save_or_restore_used_tabs(join_tab, TRUE);
}
@ -3697,12 +3757,7 @@ int JOIN_TAB_SCAN_MRR::open()
/* Dynamic range access is never used with BKA */
DBUG_ASSERT(join_tab->use_quick != 2);
JOIN_TAB *bound= join_tab-cache->tables;
for (JOIN_TAB *tab= join_tab-1; tab != bound && !tab->cache; tab--)
{
tab->status= tab->table->status;
tab->table->status= 0;
}
save_or_restore_used_tabs(join_tab, FALSE);
init_mrr_buff();

13
sql/sql_join_cache.h
View file

@ -121,11 +121,14 @@ protected:
*/
JOIN *join;
/*
Cardinality of the range of join tables whose fields can be put into the
cache. A table from the range not necessarily contributes to the cache.
/*
JOIN_TAB of the first table that can have it's fields in the join cache.
That is, tables in the [start_tab, tab) range can have their fields in the
join cache.
If a join tab in the range represents an SJM-nest, then all tables from the
nest can have their fields in the join cache, too.
*/
uint tables;
JOIN_TAB *start_tab;
/*
The total number of flag and data fields that can appear in a record
@ -647,8 +650,6 @@ public:
buff= 0;
}
JOIN_TAB *get_next_table(JOIN_TAB *tab);
friend class JOIN_CACHE_HASHED;
friend class JOIN_CACHE_BNL;
friend class JOIN_CACHE_BKA;

8
sql/sql_lex.cc
View file

@ -3114,8 +3114,16 @@ bool st_select_lex::optimize_unflattened_subqueries()
for (SELECT_LEX_UNIT *un= first_inner_unit(); un; un= un->next_unit())
{
Item_subselect *subquery_predicate= un->item;
if (subquery_predicate)
{
if (subquery_predicate->substype() == Item_subselect::IN_SUBS)
{
Item_in_subselect *in_subs=(Item_in_subselect*)subquery_predicate;
if (in_subs->is_jtbm_merged)
continue;
}
for (SELECT_LEX *sl= un->first_select(); sl; sl= sl->next_select())
{
JOIN *inner_join= sl->join;

1574
sql/sql_select.cc
View file

File diff suppressed because it is too large Load diff

111
sql/sql_select.h
View file

@ -165,13 +165,25 @@ enum enum_nested_loop_state
typedef enum_nested_loop_state
(*Next_select_func)(JOIN *, struct st_join_table *, bool);
/*
Function prototype for reading first record for a join tab
RETURN
0 - OK
-1 - Record not found
Other - A fatal error
*/
typedef int (*Read_record_func)(struct st_join_table *tab);
Next_select_func setup_end_select_func(JOIN *join);
int rr_sequential(READ_RECORD *info);
int rr_sequential_and_unpack(READ_RECORD *info);
class JOIN_CACHE;
class SJ_TMP_TABLE;
class JOIN_TAB_RANGE;
typedef struct st_join_table {
st_join_table() {} /* Remove gcc warning */
@ -200,6 +212,21 @@ typedef struct st_join_table {
st_join_table *last_inner; /**< last table table for embedding outer join */
st_join_table *first_upper; /**< first inner table for embedding outer join */
st_join_table *first_unmatched; /**< used for optimization purposes only */
/*
For join tabs that are inside an SJM bush: root of the bush
*/
st_join_table *bush_root_tab;
/* TRUE <=> This join_tab is inside an SJM bush and is the last leaf tab here */
bool last_leaf_in_bush;
/*
ptr - this is a bush, and ptr points to description of child join_tab
range
NULL - this join tab has no bush children
*/
JOIN_TAB_RANGE *bush_children;
/* Special content for EXPLAIN 'Extra' column or NULL if none */
const char *info;
@ -237,7 +264,13 @@ typedef struct st_join_table {
method (but not 'index' for some reason), i.e. this matches method which
E(#records) is in found_records.
*/
ha_rows read_time;
double read_time;
/* psergey-todo: make the below have type double, like POSITION::records_read? */
ha_rows records_read;
/* Startup cost for execution */
double startup_cost;
double partial_join_cardinality;
@ -330,11 +363,11 @@ typedef struct st_join_table {
/*
Semi-join strategy to be used for this join table. This is a copy of
POSITION::sj_strategy field. This field is set up by the
fix_semijion_strategies_for_picked_join_order.
fix_semijoin_strategies_for_picked_join_order.
*/
uint sj_strategy;
struct st_join_table *first_sjm_sibling;
uint n_sj_tables;
void cleanup();
inline bool is_using_loose_index_scan()
@ -450,9 +483,6 @@ enum_nested_loop_state sub_select_cache(JOIN *join, JOIN_TAB *join_tab, bool
end_of_records);
enum_nested_loop_state sub_select(JOIN *join,JOIN_TAB *join_tab, bool
end_of_records);
enum_nested_loop_state sub_select_sjm(JOIN *join, JOIN_TAB *join_tab,
bool end_of_records);
enum_nested_loop_state
end_send_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
bool end_of_records);
@ -600,6 +630,13 @@ inline bool sj_is_materialize_strategy(uint strategy)
return strategy >= SJ_OPT_MATERIALIZE;
}
class JOIN_TAB_RANGE: public Sql_alloc
{
public:
JOIN_TAB *start;
JOIN_TAB *end;
};
class JOIN :public Sql_alloc
{
@ -652,20 +689,40 @@ protected:
bool choose_tableless_subquery_plan();
public:
JOIN_TAB *join_tab,**best_ref;
JOIN_TAB *join_tab, **best_ref;
JOIN_TAB **map2table; ///< mapping between table indexes and JOIN_TABs
JOIN_TAB *join_tab_save; ///< saved join_tab for subquery reexecution
List<JOIN_TAB_RANGE> join_tab_ranges;
/*
Base tables participating in the join. After join optimization is done, the
tables are stored in the join order (but the only really important part is
that const tables are first).
*/
TABLE **table;
TABLE **all_tables;
/**
The table which has an index that allows to produce the requried ordering.
A special value of 0x1 means that the ordering will be produced by
passing 1st non-const table to filesort(). NULL means no such table exists.
*/
TABLE *sort_by_table;
uint tables; /**< Number of tables in the join */
/*
Number of tables in the join.
(In MySQL, it is named 'tables' and is also the number of elements in
join->join_tab array. In MariaDB, the latter is not true, so we've renamed
the variable)
*/
uint table_count;
uint outer_tables; /**< Number of tables that are not inside semijoin */
uint const_tables;
/*
Number of tables in the top join_tab array. Normally this matches
(join_tab_ranges.head()->end - join_tab_ranges.head()->start).
We keep it here so that it is saved/restored with JOIN::restore_tmp.
*/
uint top_join_tab_count;
uint send_group_parts;
bool group; /**< If query contains GROUP BY clause */
/**
@ -692,7 +749,8 @@ public:
/* Tables removed by table elimination. Set to 0 before the elimination. */
table_map eliminated_tables;
/*
Bitmap of all inner tables from outer joins
Bitmap of all inner tables from outer joins (set at start of
make_join_statistics)
*/
table_map outer_join;
ha_rows send_records,found_records,examined_rows,row_limit, select_limit;
@ -741,7 +799,6 @@ public:
/* We also maintain a stack of join optimization states in * join->positions[] */
/******* Join optimization state members end *******/
Next_select_func first_select;
/*
The cost of best complete join plan found so far during optimization,
after optimization phase - cost of picked join order (not taking into
@ -893,6 +950,10 @@ public:
bool optimized; ///< flag to avoid double optimization in EXPLAIN
bool initialized; ///< flag to avoid double init_execution calls
/*
Subqueries that will need to be converted to semi-join nests, including
those converted to jtbm nests. The list is emptied when conversion is done.
*/
Array<Item_in_subselect> sj_subselects;
/*
Additional WHERE and HAVING predicates to be considered for IN=>EXISTS
@ -900,7 +961,7 @@ public:
*/
Item *in_to_exists_where;
Item *in_to_exists_having;
/* Temporary tables used to weed-out semi-join duplicates */
List<TABLE> sj_tmp_tables;
/* SJM nests that are executed with SJ-Materialization strategy */
@ -933,7 +994,8 @@ public:
{
join_tab= join_tab_save= 0;
table= 0;
tables= 0;
table_count= 0;
top_join_tab_count= 0;
const_tables= 0;
eliminated_tables= 0;
join_list= 0;
@ -990,7 +1052,6 @@ public:
rollup.state= ROLLUP::STATE_NONE;
no_const_tables= FALSE;
first_select= sub_select;
outer_ref_cond= 0;
in_to_exists_where= NULL;
in_to_exists_having= NULL;
@ -1056,7 +1117,7 @@ public:
}
inline table_map all_tables_map()
{
return (table_map(1) << tables) - 1;
return (table_map(1) << table_count) - 1;
}
/*
Return the table for which an index scan can be used to satisfy
@ -1079,8 +1140,13 @@ public:
max_allowed_join_cache_level > JOIN_CACHE_HASHED_BIT;
}
bool choose_subquery_plan(table_map join_tables);
void get_partial_join_cost(uint n_tables,
double *read_time_arg, double *record_count_arg);
void get_partial_cost_and_fanout(uint end_tab_idx,
table_map filter_map,
double *read_time_arg,
double *record_count_arg);
void get_prefix_cost_and_fanout(uint n_tables,
double *read_time_arg,
double *record_count_arg);
/* defined in opt_subselect.cc */
bool transform_max_min_subquery();
/* True if this JOIN is a subquery under an IN predicate. */
@ -1088,7 +1154,6 @@ public:
{
return (unit->item && unit->item->is_in_predicate());
}
private:
/**
TRUE if the query contains an aggregate function but has no GROUP
@ -1099,6 +1164,15 @@ private:
void cleanup_item_list(List<Item> &items) const;
};
enum enum_with_bush_roots { WITH_BUSH_ROOTS, WITHOUT_BUSH_ROOTS};
enum enum_with_const_tables { WITH_CONST_TABLES, WITHOUT_CONST_TABLES};
JOIN_TAB *first_linear_tab(JOIN *join, enum enum_with_const_tables const_tbls);
JOIN_TAB *next_linear_tab(JOIN* join, JOIN_TAB* tab,
enum enum_with_bush_roots include_bush_roots);
JOIN_TAB *first_top_level_tab(JOIN *join, enum enum_with_const_tables with_const);
JOIN_TAB *next_top_level_tab(JOIN *join, JOIN_TAB *tab);
typedef struct st_select_check {
uint const_ref,reg_ref;
@ -1351,6 +1425,7 @@ int safe_index_read(JOIN_TAB *tab);
COND *remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value);
int test_if_item_cache_changed(List<Cached_item> &list);
int join_init_read_record(JOIN_TAB *tab);
int join_read_record_no_init(JOIN_TAB *tab);
void set_position(JOIN *join,uint idx,JOIN_TAB *table,KEYUSE *key);
inline Item * and_items(Item* cond, Item *item)
{

5
sql/sql_show.cc
View file

@ -6637,14 +6637,15 @@ int make_schema_select(THD *thd, SELECT_LEX *sel,
bool get_schema_tables_result(JOIN *join,
enum enum_schema_table_state executed_place)
{
JOIN_TAB *tmp_join_tab= join->join_tab+join->tables;
THD *thd= join->thd;
LEX *lex= thd->lex;
bool result= 0;
DBUG_ENTER("get_schema_tables_result");
thd->no_warnings_for_error= 1;
for (JOIN_TAB *tab= join->join_tab; tab < tmp_join_tab; tab++)
for (JOIN_TAB *tab= first_linear_tab(join, WITH_CONST_TABLES);
tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
if (!tab->table || !tab->table->pos_in_table_list)
break;

89
sql/sql_test.cc
View file

@ -166,58 +166,67 @@ void TEST_filesort(SORT_FIELD *sortorder,uint s_length)
void
TEST_join(JOIN *join)
{
uint i,ref;
uint ref;
int i;
List_iterator<JOIN_TAB_RANGE> it(join->join_tab_ranges);
JOIN_TAB_RANGE *jt_range;
DBUG_ENTER("TEST_join");
/*
Assemble results of all the calls to full_name() first,
in order not to garble the tabular output below.
*/
String ref_key_parts[MAX_TABLES];
for (i= 0; i < join->tables; i++)
{
JOIN_TAB *tab= join->join_tab + i;
for (ref= 0; ref < tab->ref.key_parts; ref++)
{
ref_key_parts[i].append(tab->ref.items[ref]->full_name());
ref_key_parts[i].append(" ");
}
}
DBUG_LOCK_FILE;
VOID(fputs("\nInfo about JOIN\n",DBUG_FILE));
for (i=0 ; i < join->tables ; i++)
while ((jt_range= it++))
{
JOIN_TAB *tab=join->join_tab+i;
TABLE *form=tab->table;
char key_map_buff[128];
fprintf(DBUG_FILE,"%-16.16s type: %-7s q_keys: %s refs: %d key: %d len: %d\n",
form->alias.c_ptr(),
join_type_str[tab->type],
tab->keys.print(key_map_buff),
tab->ref.key_parts,
tab->ref.key,
tab->ref.key_length);
if (tab->select)
/*
Assemble results of all the calls to full_name() first,
in order not to garble the tabular output below.
*/
String ref_key_parts[MAX_TABLES];
int tables_in_range= jt_range->end - jt_range->start;
for (i= 0; i < tables_in_range; i++)
{
char buf[MAX_KEY/8+1];
if (tab->use_quick == 2)
fprintf(DBUG_FILE,
" quick select checked for each record (keys: %s)\n",
tab->select->quick_keys.print(buf));
else if (tab->select->quick)
JOIN_TAB *tab= jt_range->start + i;
for (ref= 0; ref < tab->ref.key_parts; ref++)
{
fprintf(DBUG_FILE, " quick select used:\n");
tab->select->quick->dbug_dump(18, FALSE);
ref_key_parts[i].append(tab->ref.items[ref]->full_name());
ref_key_parts[i].append(" ");
}
else
VOID(fputs(" select used\n",DBUG_FILE));
}
if (tab->ref.key_parts)
for (i= 0; i < tables_in_range; i++)
{
fprintf(DBUG_FILE,
JOIN_TAB *tab= jt_range->start + i;
TABLE *form=tab->table;
char key_map_buff[128];
fprintf(DBUG_FILE,"%-16.16s type: %-7s q_keys: %s refs: %d key: %d len: %d\n",
form->alias.c_ptr(),
join_type_str[tab->type],
tab->keys.print(key_map_buff),
tab->ref.key_parts,
tab->ref.key,
tab->ref.key_length);
if (tab->select)
{
char buf[MAX_KEY/8+1];
if (tab->use_quick == 2)
fprintf(DBUG_FILE,
" quick select checked for each record (keys: %s)\n",
tab->select->quick_keys.print(buf));
else if (tab->select->quick)
{
fprintf(DBUG_FILE, " quick select used:\n");
tab->select->quick->dbug_dump(18, FALSE);
}
else
VOID(fputs(" select used\n",DBUG_FILE));
}
if (tab->ref.key_parts)
{
fprintf(DBUG_FILE,
" refs: %s\n", ref_key_parts[i].c_ptr_safe());
}
}
VOID(fputs("\n",DBUG_FILE));
}
DBUG_UNLOCK_FILE;
DBUG_VOID_RETURN;

8
sql/sql_union.cc
View file

@ -137,6 +137,11 @@ select_union::create_result_table(THD *thd_arg, List<Item> *column_types,
(ORDER*) 0, is_union_distinct, 1,
options, HA_POS_ERROR, (char*) alias)))
return TRUE;
//psergey-merge-fix:
table->keys_in_use_for_query.clear_all();
for (uint i=0; i < table->s->fields; i++)
table->field[i]->flags &= ~PART_KEY_FLAG;
table->file->extra(HA_EXTRA_WRITE_CACHE);
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
return FALSE;
@ -712,7 +717,8 @@ bool st_select_lex_unit::cleanup()
if ((join= fake_select_lex->join))
{
join->tables_list= 0;
join->tables= 0;
join->table_count= 0;
join->top_join_tab_count= 0;
}
error|= fake_select_lex->cleanup();
/*

13
sql/table.cc
View file

@ -5345,6 +5345,19 @@ bool st_table::is_children_attached(void)
(parent && parent->children_attached));
}
/*
Return TRUE if the table is filled at execution phase
(and so, the optimizer must not do anything that depends on the contents of
the table, like range analysis or constant table detection)
*/
bool st_table::is_filled_at_execution()
{
return test(pos_in_table_list->jtbm_subselect);
}
/*
Cleanup this table for re-execution.

22
sql/table.h
View file

@ -66,7 +66,8 @@ typedef struct st_order {
bool counter_used; /* parameter was counter of columns */
Field *field; /* If tmp-table group */
char *buff; /* If tmp-table group */
table_map used, depend_map;
table_map used; /* NOTE: the below is only set to 0 but is still used by eq_ref_table */
table_map depend_map;
} ORDER;
/**
@ -966,6 +967,12 @@ struct st_table {
file->extra(HA_EXTRA_KEYREAD);
DBUG_VOID_RETURN;
}
/*
Returns TRUE if the table is filled at execution phase (and so, the
optimizer must not do anything that depends on the contents of the table,
like range analysis or constant table detection)
*/
bool is_filled_at_execution();
inline void disable_keyread()
{
DBUG_ENTER("disable_keyread");
@ -1194,7 +1201,7 @@ class Item_in_subselect;
1) table (TABLE_LIST::view == NULL)
- base table
(TABLE_LIST::derived == NULL)
- subquery - TABLE_LIST::table is a temp table
- FROM-clause subquery - TABLE_LIST::table is a temp table
(TABLE_LIST::derived != NULL)
- information schema table
(TABLE_LIST::schema_table != NULL)
@ -1213,6 +1220,8 @@ class Item_in_subselect;
(TABLE_LIST::natural_join != NULL)
- JOIN ... USING
(TABLE_LIST::join_using_fields != NULL)
- semi-join nest (sj_on_expr!= NULL && sj_subq_pred!=NULL)
4) jtbm semi-join (jtbm_subselect != NULL)
*/
class Index_hint;
@ -1255,8 +1264,15 @@ struct TABLE_LIST
*/
table_map sj_inner_tables;
/* Number of IN-compared expressions */
uint sj_in_exprs;
uint sj_in_exprs;
/* If this is a non-jtbm semi-join nest: corresponding subselect predicate */
Item_in_subselect *sj_subq_pred;
/* If this is a jtbm semi-join object: corresponding subselect predicate */
Item_in_subselect *jtbm_subselect;
uint jtbm_table_no;
SJ_MATERIALIZATION_INFO *sj_mat_info;
/*