set optimizer_switch='materialization=on';
set @old_opt_switch=@@optimizer_switch;
set optimizer_switch='subquery_materialization_cost_based=off';
drop table if exists t1, t2, t3, t1i, t2i, t3i;
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));
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');
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;
/******************************************************************************
* Simple tests.
******************************************************************************/
# non-indexed nullable fields
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '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
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`)))))
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
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#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`)))))
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group 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	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ 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 <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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
1 - 02	2 - 02
explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
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; Using filesort
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` having 1 ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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
1 - 02	2 - 02
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
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (/* select#2 */ select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`)))))
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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	index	it2i1,it2i3	it2i1	9	NULL	5	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (/* select#2 */ select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`)))))
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#2 */ 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 <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`b2`)))))
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#2 */ 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 <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`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
1 - 02	2 - 02
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
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` having 1 ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`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
1 - 02	2 - 02
explain extended
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
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	9	NULL	3	100.00	Using index for group-by
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1` having 1 ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`max(b2)`)))))
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
2	SUBQUERY	t2i	range	it2i1,it2i3	it2i3	9	NULL	3	Using index for group-by
execute st1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
2	SUBQUERY	t2i	range	it2i1,it2i3	it2i3	9	NULL	3	Using index for group-by
prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st2;
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
execute st2;
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
explain extended
select * from t1 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	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#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` having 1 ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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'
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	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where 1 ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`b2`)))))
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i order 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	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where 1 ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`b2`)))))
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
/******************************************************************************
* 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;
Warnings:
Warning	1354	View merge algorithm can't be used here for now (assumed undefined algorithm)
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);
b1	c2
1 - 02	2 - 01
1 - 02	2 - 01
1 - 03	2 - 01
1 - 03	2 - 02
select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null);
b1	c2
1 - 02	2 - 01
1 - 02	2 - 01
1 - 03	2 - 01
1 - 03	2 - 02
select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null);
b1	c2
1 - 02	2 - 01
1 - 02	2 - 01
1 - 03	2 - 01
1 - 03	2 - 02
select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null);
b1	c2
1 - 02	2 - 01
1 - 02	2 - 01
1 - 03	2 - 01
1 - 03	2 - 02
drop view v1, v2, v1m, v2m;
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'));
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
3	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
4	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	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#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ 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 <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`b2`))))) and <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#3 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#4 */ 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 <auto_key> where ((`test`.`t3`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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'));
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	it3i1,it3i2,it3i3	it3i3	18	NULL	4	100.00	Using where; Using index
4	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
2	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#2 */ 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 <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`b2`))))) and <in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#3 */ select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (/* select#4 */ 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 <auto_key> where ((`test`.`t3i`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3i`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`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
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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'));
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	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
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#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#3 */ select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on <auto_key> where ((`test`.`t2`.`b2` = `materialized-subquery`.`c2`))))) or <in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on <auto_key> where ((`test`.`t2`.`b2` = `materialized-subquery`.`c2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`b2`))))) and <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#5 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#6 */ 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 <auto_key> where ((`test`.`t3`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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
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'));
a1	a2
1 - 02	2 - 02
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'));
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	t3c	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
6	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
4	SUBQUERY	t3b	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
3	DEPENDENT SUBQUERY	t3a	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` where ((<in_optimizer>(`test`.`t2`.`b2`,<exists>(/* select#3 */ select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`)))) or <in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on <auto_key> where ((`test`.`t2`.`b2` = `materialized-subquery`.`c2`)))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`)))) and <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#5 */ select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (/* select#6 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3c`.`c1` in <temporary table> on <auto_key> where ((`test`.`t3c`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3c`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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
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'));
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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')));
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	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
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	it3i1,it3i2,it3i3	it3i3	18	NULL	4	100.00	Using where; Using index
10	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
8	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
NULL	UNION RESULT	<union1,7>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using temporary
Warnings:
Note	1003	(/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#3 */ select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on <auto_key> where ((`test`.`t2`.`b2` = `materialized-subquery`.`c2`))))) or <in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on <auto_key> where ((`test`.`t2`.`b2` = `materialized-subquery`.`c2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`b2`))))) and <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#5 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#6 */ 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 <auto_key> where ((`test`.`t3`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`c2`))))))) union (/* select#7 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#8 */ 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 <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`b2`))))) and <in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (/* select#9 */ select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (/* select#10 */ 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 <auto_key> where ((`test`.`t3i`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3i`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1i`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1i`.`a2` = `materialized-subquery`.`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
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')));
a1	a2
1 - 02	2 - 02
1 - 01	2 - 01
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'));
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
4	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
5	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
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	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select 1,1 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#3 */ select 1,1 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 <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#4 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#5 */ 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 <auto_key> where ((`test`.`t3`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1`.`a1` = `materialized-subquery`.`c1`) and (`test`.`t1`.`a2` = `materialized-subquery`.`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
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
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;
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
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Using join buffer (Block Nested Loop)
4	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
5	SUBQUERY	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
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	Using temporary
Warnings:
Note	1003	/* select#1 */ 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 <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select 1,1 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#3 */ select 1,1 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 <in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#4 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#5 */ 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 <auto_key> where ((`test`.`t3`.`c1` = `materialized-subquery`.`b1`) and (`test`.`t3`.`c2` = `materialized-subquery`.`b2`))))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on <auto_key> where ((`test`.`t3`.`c1` = `materialized-subquery`.`c1`) and (`test`.`t3`.`c2` = `materialized-subquery`.`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
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
a1 = c1;
a1	a2	c1	c2
1 - 01	2 - 01	1 - 01	2 - 01
1 - 02	2 - 02	1 - 02	2 - 02
/******************************************************************************
* 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');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
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	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <in_optimizer>(`test`.`t3`.`c1`,<exists>(/* select#2 */ select 1 from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1`)) union /* select#3 */ select 1 from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t3`.`c1`) = `test`.`t2`.`b1`))))
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
c1	c2
1 - 01	2 - 01
1 - 02	2 - 02
1 - 03	2 - 03
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));
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	DEPENDENT SUBQUERY	t3c	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
6	DEPENDENT SUBQUERY	t2i	index_subquery	it2i1,it2i2,it2i3	it2i3	18	func,func	2	100.00	Using index; Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
4	SUBQUERY	t3b	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
3	DEPENDENT SUBQUERY	t3a	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
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#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` where ((<in_optimizer>(`test`.`t2`.`b2`,<exists>(/* select#3 */ select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`)))) or <in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on <auto_key> where ((`test`.`t2`.`b2` = `materialized-subquery`.`c2`)))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`)))) and <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#5 */ select 1,1 from `test`.`t3` `t3c` where (<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
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select '1 - 01','2 - 01' having ((<cache>(`test`.`t1`.`a1`) = '1 - 01') and (<cache>(`test`.`t1`.`a2`) = '2 - 01'))))
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01');
a1	a2
1 - 01	2 - 01
explain extended
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
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	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select '1 - 01','2 - 01' having ((<cache>(`test`.`t1`.`a1`) = '1 - 01') and (<cache>(`test`.`t1`.`a2`) = '2 - 01'))))
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
a1	a2
1 - 01	2 - 01
/******************************************************************************
* Subqueries in other uncovered clauses.
******************************************************************************/
/* SELECT clause */
select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1;
((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL
0
0
0
/* 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);
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	NULL
2	SUBQUERY	columns	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by (/* select#2 */ select `test`.`columns`.`col` from `test`.`columns` limit 1)
select * from t1 group by (select col from columns limit 1);
a1	a2
1 - 00	2 - 00
explain extended
select * from t1 group by (a1 in (select col from columns));
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 temporary; Using filesort
2	DEPENDENT SUBQUERY	columns	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index; Using where; Full scan on NULL key
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by <in_optimizer>(`test`.`t1`.`a1`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a1`) in columns on PRIMARY where <if>(outer_field_is_not_null, (<cache>(`test`.`t1`.`a1`) = `test`.`columns`.`col`), true))))
select * from t1 group by (a1 in (select col from columns));
a1	a2
1 - 00	2 - 00
/* ORDER BY clause */
explain extended
select * from t1 order by (select col from columns limit 1);
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	NULL
2	SUBQUERY	columns	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` order by (/* select#2 */ select `test`.`columns`.`col` from `test`.`columns` limit 1)
select * from t1 order by (select col from columns limit 1);
a1	a2
1 - 00	2 - 00
1 - 01	2 - 01
1 - 02	2 - 02
/******************************************************************************
* Column types/sizes that affect materialization.
******************************************************************************/
# 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);
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	NULL
Warnings:
Note	1003	/* select#1 */ select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` where <in_optimizer>((`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`),(`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2bit`.`b1`,`test`.`t2bit`.`b2` from `test`.`t2bit` where 1 ), <primary_index_lookup>(`test`.`t1bit`.`a1` in <temporary table> on <auto_key> where ((`test`.`t1bit`.`a1` = `materialized-subquery`.`b1`) and (`test`.`t1bit`.`a2` = `materialized-subquery`.`b2`)))))
select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);
bin(a1)	bin(a2)
1	101
10	110
drop table t1bit, t2bit;
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);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1bb	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	DEPENDENT SUBQUERY	t2bb	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select conv(`test`.`t1bb`.`a1`,10,2) AS `bin(a1)`,`test`.`t1bb`.`a2` AS `a2` from `test`.`t1bb` where <in_optimizer>((`test`.`t1bb`.`a1`,`test`.`t1bb`.`a2`),<exists>(/* select#2 */ select 1,1 from `test`.`t2bb` where ((<cache>(`test`.`t1bb`.`a1`) = `test`.`t2bb`.`b1`) and (<cache>(`test`.`t1bb`.`a2`) = `test`.`t2bb`.`b2`))))
select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);
bin(a1)	a2
1	101
10	110
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);
s2
0
1
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);
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);
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#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`c`)))))
select a from t1 where a in (select c from t2 where d >= 20);
a
2
2
2
3
create index it1a on t1(a);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
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#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`c`)))))
select a from t1 where a in (select c from t2 where d >= 20);
a
2
2
2
3
insert into t2 values (1,10);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
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#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`c`)))))
select a from t1 where a in (select c from t2 where d >= 20);
a
2
2
2
3
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	it1a	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#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`c`)))))
select a from t1 group by a having a in (select c from t2 where d >= 20);
a
2
3
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);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	it1a,iab	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#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`c`)))))
select a from t1 group by a having a in (select c from t2 where d >= 20);
a
2
3
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));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	it1a,iab	iab	8	NULL	7	100.00	Using index
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where
3	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select 1 from `test`.`t2` where (<nop>(<in_optimizer>(`test`.`t2`.`d`,<exists>(/* select#3 */ select 1 from `test`.`t3` where (max(`test`.`t1`.`b`) = `test`.`t3`.`e`) having (<cache>(`test`.`t2`.`d`) >= <ref_null_helper>(`test`.`t3`.`e`))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`))))
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));
a
2
3
explain extended
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	iab	8	NULL	7	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where
3	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select 1 from `test`.`t2` where (<nop>(<in_optimizer>(`test`.`t2`.`d`,<exists>(/* select#3 */ select 1 from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`))))
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
a
1
2
2
2
3
drop table t1, t2, t3;
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);
1
1
1
1
drop table t2;
create table t1 (a1 int key);
create table t2 (b1 int);
insert into t1 values (5);
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	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 group by b1);
min(a1)
NULL
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	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
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');
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
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	NULL
select a,b from t1 where b in (select a from t1);
a	b
prepare st1 from "select a,b from t1 where b in (select a from t1)";
execute st1;
a	b
execute st1;
a	b
drop table t1;
CREATE TABLE t1 (a varchar(5), b varchar(10));
INSERT INTO t1 VALUES
('AAA', 5), ('BBB', 4), ('BBB', 1), ('CCC', 2),
('CCC', 7), ('AAA', 2), ('AAA', 4), ('BBB', 3), ('AAA', 8);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a	b
BBB	4
CCC	7
AAA	8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	Using where
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	9	Using temporary; Using filesort
ALTER TABLE t1 ADD INDEX(a);
FLUSH STATUS;
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a	b
BBB	4
CCC	7
AAA	8
SHOW SESSION STATUS LIKE 'Sort_scan%';
Variable_name	Value
Sort_scan	1
EXPLAIN SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	Using where
2	SUBQUERY	t1	ALL	a	NULL	NULL	NULL	9	Using temporary; Using filesort
DROP TABLE t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(/* select#2 */ select 1 from `test`.`t1` where 1))
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(/* select#2 */ select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3)))
DROP TABLE t1;
#
# BUG#49630: Segfault in select_describe() with double 
#            nested subquery and materialization
#
CREATE TABLE t1 (t1i int);
CREATE TABLE t2 (t2i int);
CREATE TABLE t3 (t3i int);
CREATE TABLE t4 (t4i int);
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1),(2);
INSERT INTO t3 VALUES (1),(2);
INSERT INTO t4 VALUES (1),(2);

EXPLAIN 
SELECT t1i
FROM t1 JOIN t4 ON t1i=t4i  
WHERE (t1i)  IN (  
SELECT t2i
FROM t2  
WHERE (t2i)  IN (  
SELECT t3i
FROM t3  
GROUP BY t3i
)  
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	NULL
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
3	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	NULL
DROP TABLE t1,t2,t3,t4;
#
# BUG#46680 - Assertion failed in file item_subselect.cc, 
#             line 305 crashing on HAVING subquery
#
# Create tables
#
CREATE TABLE t1 (
pk INT,
v VARCHAR(1) DEFAULT NULL,
PRIMARY KEY(pk)
);
CREATE TABLE t2 LIKE t1;
CREATE TABLE t3 LIKE t1;
CREATE TABLE empty1 (a int);
INSERT INTO t1 VALUES (1,'c'),(2,NULL);
INSERT INTO t2 VALUES (3,'m'),(4,NULL);
INSERT INTO t3 VALUES (1,'n');

#
# 1) Test that subquery materialization is setup for query with
#    premature optimize() exit due to "Impossible WHERE"
#
SELECT MIN(t2.pk)
FROM t2 JOIN t1 ON t1.pk=t2.pk
WHERE 'j'
HAVING ('m') IN ( 
SELECT v
FROM t2);
MIN(t2.pk)
NULL
Warnings:
Warning	1292	Truncated incorrect INTEGER value: 'j'

EXPLAIN
SELECT MIN(t2.pk)
FROM t2 JOIN t1 ON t1.pk=t2.pk
WHERE 'j'
HAVING ('m') IN ( 
SELECT v
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
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
Warnings:
Warning	1292	Truncated incorrect INTEGER value: 'j'

#
# 2) Test that subquery materialization is setup for query with
#    premature optimize() exit due to "No matching min/max row"
#
SELECT MIN(t2.pk)
FROM t2 
WHERE t2.pk>10
HAVING ('m') IN ( 
SELECT v
FROM t2);
MIN(t2.pk)
NULL

EXPLAIN
SELECT MIN(t2.pk)
FROM t2 
WHERE t2.pk>10
HAVING ('m') IN ( 
SELECT v
FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where

#
# 3) Test that subquery materialization is setup for query with
#    premature optimize() exit due to "Select tables optimized away"
#
SELECT MIN(pk)
FROM t1
WHERE pk=NULL
HAVING ('m') IN ( 
SELECT v
FROM t2);
MIN(pk)
NULL

EXPLAIN
SELECT MIN(pk)
FROM t1
WHERE pk=NULL
HAVING ('m') IN ( 
SELECT v
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
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where

#
# 4) Test that subquery materialization is setup for query with
#    premature optimize() exit due to "No matching row in const table"
#

SELECT MIN(a)
FROM (SELECT a FROM empty1) tt
HAVING ('m') IN ( 
SELECT v
FROM t2);
MIN(a)
NULL

EXPLAIN 
SELECT MIN(a)
FROM (SELECT a FROM empty1) tt
HAVING ('m') IN ( 
SELECT v
FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
3	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table

#
# 5) Test that subquery materialization is setup for query with
#    premature optimize() exit due to "Impossible WHERE noticed 
#    after reading const tables"
#
SELECT min(t1.pk)
FROM t1
WHERE t1.pk IN (SELECT 1 from t3 where pk>10)
HAVING ('m') IN ( 
SELECT v
FROM t2);
min(t1.pk)
NULL

EXPLAIN
SELECT min(t1.pk)
FROM t1
WHERE t1.pk IN (SELECT 1 from t3 where pk>10)
HAVING ('m') IN ( 
SELECT v
FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	2	Using where; Using index
3	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
#
# Cleanup for BUG#46680
#
DROP TABLE IF EXISTS t1,t2,t3,empty1;
#
# BUG#52344 - Subquery materialization: 
#  	     Assertion if subquery in on-clause of outer join
#
CREATE TABLE t1 (i INTEGER);
INSERT INTO t1 VALUES (10);
CREATE TABLE t2 (j INTEGER);
INSERT INTO t2 VALUES (5);
CREATE TABLE t3 (k INTEGER);
EXPLAIN
SELECT i, j FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	NULL
1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	NULL
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
SELECT i, j FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
i	j
10	NULL
EXPLAIN
SELECT i, j FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	NULL
1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	NULL
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
SELECT i, j FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
i	j
10	NULL
DROP TABLE t1, t2, t3;
# End BUG#52344
CREATE TABLE t1 (
pk INTEGER AUTO_INCREMENT,
col_int_nokey INTEGER,
col_int_key INTEGER,
col_varchar_key VARCHAR(1),
PRIMARY KEY (pk),
KEY (col_int_key),
KEY (col_varchar_key, col_int_key)
)
;
INSERT INTO t1 (
col_int_key, col_int_nokey, col_varchar_key
) 
VALUES
(2, NULL, 'w'),
(9, 7, 'm'),
(3, 9, 'm'),
(9, 7, 'k'),
(NULL, 4, 'r'),
(9, 2, 't'),
(3, 6, 'j'),
(8, 8, 'u'),
(8, NULL, 'h'),
(53, 5, 'o'),
(0, NULL, NULL),
(5, 6, 'k'),
(166, 188, 'e'),
(3, 2, 'n'),
(0, 1, 't'),
(1, 1, 'c'),
(9, 0, 'm'),
(5, 9, 'y'),
(6, NULL, 'f'),
(2, 4, 'd')
;
SELECT table2.col_varchar_key AS field1,
table2.col_int_nokey AS field2
FROM ( t1 AS table1 LEFT OUTER JOIN t1 AS table2
ON (table2.col_varchar_key = table1.col_varchar_key  ) ) 
WHERE table1.pk = 6
HAVING  ( field2 ) IN 
( SELECT SUBQUERY2_t2.col_int_nokey AS SUBQUERY2_field2 
FROM ( t1 AS SUBQUERY2_t1 JOIN t1 AS SUBQUERY2_t2
ON (SUBQUERY2_t2.col_varchar_key = SUBQUERY2_t1.col_varchar_key ) ) )
ORDER BY field2 
;
field1	field2
t	1
t	2
drop table t1;
#
# BUG#53103: MTR test ps crashes in optimize_cond() 
#            when running with --debug
#
CREATE TABLE t1(track varchar(15));
INSERT INTO t1 VALUES ('CAD'), ('CAD');
PREPARE STMT FROM
"SELECT 1 FROM t1
  WHERE
        track IN (SELECT track FROM t1
                                    GROUP BY track 
                                      HAVING track>='CAD')";
EXECUTE STMT ;
1
1
1
EXECUTE STMT ;
1
1
1
DEALLOCATE PREPARE STMT;
DROP TABLE t1;
# End of BUG#53103
#
# BUG#54511 - Assertion failed: cache != 0L in file 
#             sql_select.cc::sub_select_cache on HAVING
#
CREATE TABLE t1 (i int(11));
CREATE TABLE t2 (c char(1));
CREATE TABLE t3 (c char(1));
INSERT INTO t1 VALUES (1), (2);
INSERT INTO t2 VALUES ('a'), ('b');
INSERT INTO t3 VALUES ('x'), ('y');
SELECT COUNT( i ),i
FROM t1
HAVING ('c')  
IN (SELECT t2.c FROM (t2 JOIN t3));
COUNT( i )	i
DROP TABLE t1,t2,t3;
# End BUG#54511
#
# BUG#56367 - Assertion exec_method != EXEC_MATERIALIZATION...
#             on subquery in FROM
#
CREATE TABLE t1 (a INTEGER);
CREATE TABLE t2 (b INTEGER);
INSERT INTO t2 VALUES (1);
explain SELECT a FROM (
SELECT t1.* FROM t1 LEFT JOIN t2 ON t1.a > 3 OR t2.b IN (SELECT a FROM t1)
) table1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
3	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
SELECT a FROM (
SELECT t1.* FROM t1 LEFT JOIN t2 ON t1.a > 3 OR t2.b IN (SELECT a FROM t1)
) table1;
a
DROP TABLE t1, t2;
# End BUG#56367
#
# Bug#59833 - materialization=on/off leads to different result set
#             when using IN
#
CREATE TABLE t1 (
pk int NOT NULL,
f1 int DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=MyISAM;
CREATE TABLE t2 (
pk int NOT NULL,
f1 int DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (10,0);
INSERT INTO t2 VALUES (10,0),(11,0);
explain SELECT * FROM t1 JOIN t2 USING (f1)
WHERE t1.f1 IN (SELECT t1.pk FROM t1 ORDER BY t1.f1);
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	DEPENDENT SUBQUERY	t1	system	PRIMARY	NULL	NULL	NULL	1	NULL
SELECT * FROM t1 JOIN t2 USING (f1)
WHERE t1.f1 IN (SELECT t1.pk FROM t1 ORDER BY t1.f1);
f1	pk	pk
DROP TABLE t1, t2;
# End Bug#59833
#
# Bug#11852644 - CRASH IN ITEM_REF::SAVE_IN_FIELD ON SELECT DISTINCT
#
CREATE TABLE t1 (
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
KEY col_varchar_key (col_varchar_key)) 
;
INSERT INTO t1 VALUES
('v','v'),('r','r');
CREATE TABLE t2 (
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
KEY col_varchar_key(col_varchar_key)) 
;
INSERT INTO t2 VALUES
('r','r'),('c','c');
CREATE VIEW v3 AS SELECT * FROM t2;
SELECT DISTINCT alias2.col_varchar_key 
FROM t1 AS alias1 JOIN v3 AS alias2 
ON alias2.col_varchar_key = alias1.col_varchar_key
HAVING col_varchar_key IN (SELECT col_varchar_nokey FROM t2)
;
col_varchar_key
r
DROP TABLE t1, t2;
DROP VIEW v3;
# End Bug#11852644

# Bug#12668294 - GROUP BY ON EMPTY RESULT GIVES EMPTY ROW
# INSTEAD OF NULL WHEN MATERIALIZATION ON

CREATE TABLE t1 (col_int_nokey INT) ENGINE=MEMORY;
CREATE TABLE t2 (col_int_nokey INT) ENGINE=MEMORY;
INSERT INTO t2 VALUES (8),(7);
CREATE TABLE t3 (col_int_nokey INT) ENGINE=MEMORY;
INSERT INTO t3 VALUES (7);
SELECT MIN(t3.col_int_nokey),t1.col_int_nokey AS field3
FROM t3
LEFT JOIN t1
ON t1.col_int_nokey
WHERE (194, 200) IN (
SELECT SQ4_alias1.col_int_nokey,
SQ4_alias2.col_int_nokey
FROM t2 AS SQ4_alias1
JOIN
t2 AS SQ4_alias2
ON SQ4_alias2.col_int_nokey = 5
)
GROUP BY field3 ;
MIN(t3.col_int_nokey)	field3
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
#
# Bug#13419028 - SUBQUERY MATERIALIZATION NOT USED IN CREATE
# SELECT
#
CREATE TABLE t1(a int);
INSERT INTO t1 values(1),(2);
CREATE TABLE t2(a int);
INSERT INTO t2 values(1),(2);
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT * FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	NULL
FLUSH STATUS;
SELECT * FROM t1 WHERE a IN (SELECT * FROM t2);
a
1
2
CREATE TABLE t3 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2);
SELECT * FROM t3;
a
1
2
SHOW STATUS LIKE "CREATED_TMP_TABLES";
Variable_name	Value
Created_tmp_tables	2
DROP TABLE t1,t2,t3;
#
# Bug#13552968: Extra row with materialization on join + subquery in
#
CREATE TABLE t1 (
col_varchar_nokey varchar(1) NOT NULL
) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('b');
CREATE TABLE t2 (
col_varchar_nokey varchar(1) NOT NULL
) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('k');
CREATE TABLE t3 (
col_varchar_nokey varchar(1) NOT NULL
) ENGINE=MyISAM;
explain SELECT STRAIGHT_JOIN *
FROM t1 LEFT JOIN t2 ON t1.col_varchar_nokey IN (SELECT col_varchar_nokey
FROM t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	NULL
1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	NULL
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
SELECT STRAIGHT_JOIN *
FROM t1 LEFT JOIN t2 ON t1.col_varchar_nokey IN (SELECT col_varchar_nokey
FROM t3);
col_varchar_nokey	col_varchar_nokey
b	NULL
DROP TABLE t1, t2, t3;
# End of test for bug#13552968
#
# Bug#13591383: Assertion !(*tab->on_expr_ref && .. && is_expensive())
# in join_read_const_table()
#
CREATE TABLE t1 (v INTEGER) ENGINE=MyISAM;
INSERT INTO t1 VALUES(1);
CREATE TABLE t2 (v INTEGER) ENGINE=MyISAM;
SELECT *
FROM t1 LEFT JOIN t2
ON t2.v IN(SELECT v FROM t1);
v	v
1	NULL
DROP TABLE t1, t2;
# End of test for bug#13591383.
#
# Bug#13607423: Assertion !(*tab->on_expr_ref->is_expensive())
# in join_read_const_table()
#
CREATE TABLE t1 (
pk int NOT NULL,
col_int_nokey int DEFAULT NULL,
col_int_key int DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,2,4), (2,150,62);
CREATE TABLE t2 (
pk int NOT NULL,
col_int_key int DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,7);
explain SELECT table1.pk, table2.pk
FROM t2 AS table1 LEFT JOIN t2 AS table2
ON table2.pk = table1.pk AND
table2.col_int_key IN
(SELECT col_int_key
FROM t1 AS innr
WHERE innr.col_int_nokey > innr.col_int_nokey
GROUP BY col_int_key
HAVING COUNT(*) > 0
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	table1	system	NULL	NULL	NULL	NULL	1	NULL
1	PRIMARY	table2	system	PRIMARY	NULL	NULL	NULL	1	NULL
2	DEPENDENT SUBQUERY	innr	ALL	col_int_key	NULL	NULL	NULL	2	Using where; Using temporary; Using filesort
FLUSH STATUS;
SELECT table1.pk, table2.pk
FROM t2 AS table1 LEFT JOIN t2 AS table2
ON table2.pk = table1.pk AND
table2.col_int_key IN
(SELECT col_int_key
FROM t1 AS innr
WHERE innr.col_int_nokey > innr.col_int_nokey
GROUP BY col_int_key
HAVING COUNT(*) > 0
);
pk	pk
1	NULL
SHOW SESSION STATUS LIKE 'Sort_scan%';
Variable_name	Value
Sort_scan	1
DROP TABLE t1, t2;
# End of test for bug#13607423.

Test of WL#6094 "Allow subquery materialization in NOT IN if all
columns are not nullable"

create table t1(a int not null);
create table t2(a int not null);
insert into t1 values(1),(2);
insert into t2 values(1),(2);
Test in SELECT list

cols not nullable => subq materialization
explain extended select a, (a,a) in (select a,a from t2) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`a`),(`test`.`t1`.`a`,`test`.`t1`.`a`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`a`,`test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`a`) and (`test`.`t1`.`a` = `materialized-subquery`.`a`))))) AS `(a,a) in (select a,a from t2)` from `test`.`t1`
select a, (a,a) in (select a,a from t2) from t1;
a	(a,a) in (select a,a from t2)
1	1
2	1

cols not nullable => subq materialization
explain extended select t1.a, t2.a, (t1.a,t1.a) in (select a,a from t2 as t3)
from t1 join t2 on t1.a+t2.a=1000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`a`),(`test`.`t1`.`a`,`test`.`t1`.`a`) in ( <materialize> (/* select#2 */ select `test`.`t3`.`a`,`test`.`t3`.`a` from `test`.`t2` `t3` where 1 having 1 ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`a`) and (`test`.`t1`.`a` = `materialized-subquery`.`a`))))) AS `(t1.a,t1.a) in (select a,a from t2 as t3)` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` + `test`.`t2`.`a`) = 1000)
select t1.a, t2.a, (t1.a,t1.a) in (select a,a from t2 as t3)
from t1 join t2 on t1.a+t2.a=1000;
a	a	(t1.a,t1.a) in (select a,a from t2 as t3)

t2.a is not nullable, but in the query it may appear as NULL
as it's in an outer join. So, no materialization.
explain extended select t1.a, t2.a, (t2.a,t2.a) in (select a,a from t2 as t3)
from t1 left join t2 on t1.a+t2.a=1000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`a`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` `t3` where (<if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`a`) = `test`.`t3`.`a`) or <cache>(isnull(`test`.`t3`.`a`))), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`a`) = `test`.`t3`.`a`) or <cache>(isnull(`test`.`t3`.`a`))), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t3`.`a`), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t3`.`a`), true)))) AS `(t2.a,t2.a) in (select a,a from t2 as t3)` from `test`.`t1` left join `test`.`t2` on(((`test`.`t1`.`a` + `test`.`t2`.`a`) = 1000)) where 1
select t1.a, t2.a, (t2.a,t2.a) in (select a,a from t2 as t3)
from t1 left join t2 on t1.a+t2.a=1000;
a	a	(t2.a,t2.a) in (select a,a from t2 as t3)
1	NULL	NULL
2	NULL	NULL

alter table t2 modify a int;
two nullable inner cols => no subq materialization
explain extended select t1.a, t2.a, (t1.a,t1.a) in (select a,a from t2 as t3)
from t1 join t2 on t1.a+t2.a=1000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`a`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` `t3` where (((<cache>(`test`.`t1`.`a`) = `test`.`t3`.`a`) or isnull(`test`.`t3`.`a`)) and ((<cache>(`test`.`t1`.`a`) = `test`.`t3`.`a`) or isnull(`test`.`t3`.`a`))) having (<is_not_null_test>(`test`.`t3`.`a`) and <is_not_null_test>(`test`.`t3`.`a`)))) AS `(t1.a,t1.a) in (select a,a from t2 as t3)` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` + `test`.`t2`.`a`) = 1000)
select t1.a, t2.a, (t1.a,t1.a) in (select a,a from t2 as t3)
from t1 join t2 on t1.a+t2.a=1000;
a	a	(t1.a,t1.a) in (select a,a from t2 as t3)
alter table t2 modify a int not null;

Test in WHERE

top-level => subq materialization. With one exception: if
semijoin is enabled in @@optimizer_switch, semijoin is chosen,
then rejected (due to outer join), and in that case, the
fallback is IN->EXISTS, subq-materialization is not tried...
explain extended select t1.a, t2.a
from t1 join t2 on t1.a+t2.a=3
where (t2.a,t2.a) in (select a,a from t2 as t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`a`),(`test`.`t2`.`a`,`test`.`t2`.`a`) in ( <materialize> (/* select#2 */ select `test`.`t3`.`a`,`test`.`t3`.`a` from `test`.`t2` `t3` where 1 ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on <auto_key> where ((`test`.`t2`.`a` = `materialized-subquery`.`a`) and (`test`.`t2`.`a` = `materialized-subquery`.`a`))))) and ((`test`.`t1`.`a` + `test`.`t2`.`a`) = 3))
select t1.a, t2.a
from t1 join t2 on t1.a+t2.a=3
where (t2.a,t2.a) in (select a,a from t2 as t3);
a	a
2	1
1	2

cols not nullable => subq materialization
explain extended select t1.a, t2.a
from t1 join t2 on t1.a+t2.a=3
where (t2.a,t2.a) not in (select a,a from t2 as t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((not(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`a`),(`test`.`t2`.`a`,`test`.`t2`.`a`) in ( <materialize> (/* select#2 */ select `test`.`t3`.`a`,`test`.`t3`.`a` from `test`.`t2` `t3` where 1 having 1 ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on <auto_key> where ((`test`.`t2`.`a` = `materialized-subquery`.`a`) and (`test`.`t2`.`a` = `materialized-subquery`.`a`))))))) and ((`test`.`t1`.`a` + `test`.`t2`.`a`) = 3))
select t1.a, t2.a
from t1 join t2 on t1.a+t2.a=3
where (t2.a,t2.a) not in (select a,a from t2 as t3);
a	a
drop table t1,t2;

Test of WL6095 "Allow subquery materialization in NOT IN if
single-column subquery"

create table t1(a int null);
create table t2(a int null);
insert into t1 values(1),(2);
insert into t2 values(1),(2);

one col => subq materialization
explain extended select a, a in (select a from t2) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`a`))))) AS `a in (select a from t2)` from `test`.`t1`
select a, a in (select a from t2) from t1;
a	a in (select a from t2)
1	1
2	1

t2.a is not nullable, but in the query it may appear as NULL
as it's in an outer join. But there is only one inner column so
materialization is possible
explain extended select t1.a, t2.a, t2.a in (select * from t2 as t3)
from t1 left join t2 on t1.a+t2.a=1000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,<in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (/* select#2 */ select `test`.`t3`.`a` from `test`.`t2` `t3` where 1 having 1 ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on <auto_key> where ((`test`.`t2`.`a` = `materialized-subquery`.`a`))))) AS `t2.a in (select * from t2 as t3)` from `test`.`t1` left join `test`.`t2` on(((`test`.`t1`.`a` + `test`.`t2`.`a`) = 1000)) where 1
select t1.a, t2.a, t2.a in (select * from t2 as t3)
from t1 left join t2 on t1.a+t2.a=1000;
a	a	t2.a in (select * from t2 as t3)
1	NULL	NULL
2	NULL	NULL

_two_ outer columns, nullable => no materialization
explain extended select t1.a, t2.a, (t2.a,t2.a) in (select a,a from t2 as t3)
from t1 left join t2 on t1.a+t2.a=1000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (Block Nested Loop)
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`a`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` `t3` where (<if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`a`) = `test`.`t3`.`a`) or isnull(`test`.`t3`.`a`)), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`a`) = `test`.`t3`.`a`) or isnull(`test`.`t3`.`a`)), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t3`.`a`), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t3`.`a`), true)))) AS `(t2.a,t2.a) in (select a,a from t2 as t3)` from `test`.`t1` left join `test`.`t2` on(((`test`.`t1`.`a` + `test`.`t2`.`a`) = 1000)) where 1
select t1.a, t2.a, (t2.a,t2.a) in (select a,a from t2 as t3)
from t1 left join t2 on t1.a+t2.a=1000;
a	a	(t2.a,t2.a) in (select a,a from t2 as t3)
1	NULL	NULL
2	NULL	NULL
drop table t1,t2;

Test in HAVING
create table t1(a int, b int);
create table t2(a int);
insert into t1 values(1,1),(1,2),(1,3),(2,1),(2,2),(2,3);
insert into t2 values(10),(20);
no NULLs.
explain extended select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary; Using filesort
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `z`,sum(`test`.`t1`.`b`) AS `sum(t1.b)` from `test`.`t1` group by `test`.`t1`.`a` having isnull(<in_optimizer>(`z`,`z` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`z` in <temporary table> on <auto_key> where ((`z` = `materialized-subquery`.`a`))))))
select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
z	sum(t1.b)
one outer NULL
insert into t1 values(null,null);
explain extended select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
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 temporary; Using filesort
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `z`,sum(`test`.`t1`.`b`) AS `sum(t1.b)` from `test`.`t1` group by `test`.`t1`.`a` having isnull(<in_optimizer>(`z`,`z` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`z` in <temporary table> on <auto_key> where ((`z` = `materialized-subquery`.`a`))))))
select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
z	sum(t1.b)
NULL	NULL
one outer NULL and one inner NULL
insert into t2 values(null);
explain extended select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
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 temporary; Using filesort
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `z`,sum(`test`.`t1`.`b`) AS `sum(t1.b)` from `test`.`t1` group by `test`.`t1`.`a` having isnull(<in_optimizer>(`z`,`z` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`z` in <temporary table> on <auto_key> where ((`z` = `materialized-subquery`.`a`))))))
select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
z	sum(t1.b)
NULL	NULL
1	6
2	6
one inner NULL
delete from t1 where a is null;
explain extended select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary; Using filesort
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `z`,sum(`test`.`t1`.`b`) AS `sum(t1.b)` from `test`.`t1` group by `test`.`t1`.`a` having isnull(<in_optimizer>(`z`,`z` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`z` in <temporary table> on <auto_key> where ((`z` = `materialized-subquery`.`a`))))))
select t1.a as z, sum(t1.b) from t1 group by t1.a
having (z in (select * from t2)) is null;
z	sum(t1.b)
1	6
2	6
drop table t1,t2;

Verify that an inner NULL is looked up only once (result is
cached).
create table t1(a int);
create table t2(a int);
insert into t1 values(1),(2),(3),(4),(5),(6);
insert into t1 select * from t1;
insert into t2 values(10),(20),(NULL);
explain extended select a, (a in (select * from t2)) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	12	100.00	NULL
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where 1 having 1 ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on <auto_key> where ((`test`.`t1`.`a` = `materialized-subquery`.`a`))))) AS `(a in (select * from t2))` from `test`.`t1`
flush status;
select a, (a in (select * from t2)) from t1;
a	(a in (select * from t2))
1	NULL
2	NULL
3	NULL
4	NULL
5	NULL
6	NULL
1	NULL
2	NULL
3	NULL
4	NULL
5	NULL
6	NULL
There will be one look-up in the temporary table for each row
of t1 (12), plus one additional look-up to check whether table
contains a NULL value.
show status like "handler_read_key";
Variable_name	Value
Handler_read_key	13
drop table t1,t2;
#
# Bug#13495157 - SUBQUERY MATERIALIZATION NOT USED FOR CERTAIN
# STATEMENTS
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(2),(3);
CREATE TABLE t2(a INT);
INSERT INTO t2 VALUES(1),(2),(4);
# subquery materialization used for SELECT:
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
a
1
# Also used for INSERT SELECT:
CREATE TABLE t3 SELECT * FROM t1;
EXPLAIN INSERT INTO t3 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
INSERT INTO t3 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
SELECT * FROM t3;
a
1
1
2
3
EXPLAIN INSERT INTO t2 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where; Using temporary
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
INSERT INTO t2 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
SELECT * FROM t2;
a
1
1
2
4
EXPLAIN INSERT INTO t2 SELECT * FROM t2 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Using temporary
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where
INSERT INTO t2 SELECT * FROM t2 WHERE a IN (SELECT * FROM t2 WHERE a <> 2);
SELECT * FROM t2;
a
1
1
1
1
2
4
4
# Not used for single-table UPDATE, DELETE:
EXPLAIN SELECT * FROM t2 WHERE a IN (SELECT * FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	Using where
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	NULL
EXPLAIN UPDATE t2 SET a=a-1 WHERE a IN (SELECT * FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
UPDATE t2 SET a=a-1 WHERE a IN (SELECT * FROM t1);
SELECT * FROM t2;
a
0
0
0
0
1
4
4
EXPLAIN DELETE FROM t2 WHERE a IN (SELECT * FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
DELETE FROM t2 WHERE a IN (SELECT * FROM t1);
SELECT * FROM t2;
a
0
0
0
0
4
4
EXPLAIN UPDATE t2 SET a=a-1 WHERE a IN (SELECT * FROM t2);
ERROR HY000: You can't specify target table 't2' for update in FROM clause
EXPLAIN DELETE FROM t2 WHERE a IN (SELECT * FROM t2);
ERROR HY000: You can't specify target table 't2' for update in FROM clause
UPDATE t2 SET a=3 WHERE a=0;
# Used for multi-table UPDATE, DELETE:
EXPLAIN SELECT * FROM t2,t3 WHERE t2.a IN (SELECT * FROM t1 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	6	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
EXPLAIN UPDATE t2,t3 SET t2.a=t2.a-2 WHERE t2.a IN (SELECT * FROM t1 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	6	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
UPDATE t2,t3 SET t2.a=t2.a-2 WHERE t2.a IN (SELECT * FROM t1 WHERE a <> 2);
SELECT * FROM t2;
a
1
1
1
1
4
4
EXPLAIN DELETE t2.* FROM t2,t3 WHERE t2.a IN (SELECT * FROM t1 WHERE a <> 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	NULL
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	6	Using where; Using join buffer (Block Nested Loop)
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
DELETE t2.* FROM t2,t3 WHERE t2.a IN (SELECT * FROM t1 WHERE a <> 2);
SELECT * FROM t2;
a
4
4
EXPLAIN UPDATE t2,t3 SET t2.a=10 WHERE t2.a IN (SELECT * FROM t2 WHERE a <> 2);
ERROR HY000: You can't specify target table 't2' for update in FROM clause
EXPLAIN DELETE t2.* FROM t2,t3 WHERE t2.a IN (SELECT * FROM t2 WHERE a <> 2);
ERROR HY000: You can't specify target table 't2' for update in FROM clause
DROP TABLE t1,t2,t3;
#
# Test that subquery materialization only does one lookup: does
# not try to read the next row if the first row failed the
# subquery's WHERE. We use a case where index lookup is not
# enough to satisfy IN(), because index has length two when the
# outer value has length three, and thus the post-filtering
# WHERE added by subselect_hash_sj_engine::setup() makes the
# decision.
#
create table t1 (a varchar(3));
create table t2 (a varchar(2));
insert into t1 values('aaa'), ('aaa');
insert into t2 values('aa'), ('aa');
explain select * from t1 where a in (select a from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	NULL
flush status;
select * from t1 where a in (select a from t2);
a
show status like "handler_read%";
Variable_name	Value
Handler_read_first	0
Handler_read_key	1
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	6
drop table t1,t2;
#
# Bug#13655791 DIFFERENT RESULT WITH WL6094 ON QUERY WITH XOR
# IN WHERE CLAUSE + MYISAM
#
CREATE TABLE t1 (
pk int NOT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (10,'x');
CREATE TABLE t2 (
pk int NOT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t2 VALUES (1,'v'), (5,'x'), (11,'z'), (12,'c'), (15,'y');
CREATE TABLE t3 (
pk int NOT NULL,
col_int_key int DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
);
INSERT INTO t3 VALUES (10,8);
CREATE TABLE t4 (
pk int NOT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t4 VALUES (1,'x');
EXPLAIN SELECT OUTR.pk, OUTR.col_varchar_nokey, OUTR2.col_varchar_nokey
FROM t2 AS OUTR2
JOIN t4 AS OUTR
ON (OUTR2.col_varchar_nokey > OUTR.col_varchar_nokey)
WHERE
OUTR.col_varchar_nokey IN (
SELECT INNR.col_varchar_nokey
FROM t3 AS INNR2
LEFT JOIN t1 AS INNR
ON (INNR2.col_int_key >= INNR.pk)
)
XOR OUTR.pk < 6
;
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	DEPENDENT SUBQUERY	INNR2	system	NULL	NULL	NULL	NULL	1	NULL
2	DEPENDENT SUBQUERY	INNR	system	PRIMARY	NULL	NULL	NULL	1	NULL
FLUSH STATUS;
SELECT OUTR.pk, OUTR.col_varchar_nokey, OUTR2.col_varchar_nokey
FROM t2 AS OUTR2
JOIN t4 AS OUTR
ON (OUTR2.col_varchar_nokey > OUTR.col_varchar_nokey)
WHERE
OUTR.col_varchar_nokey IN (
SELECT INNR.col_varchar_nokey
FROM t3 AS INNR2
LEFT JOIN t1 AS INNR
ON (INNR2.col_int_key >= INNR.pk)
)
XOR OUTR.pk < 6
;
pk	col_varchar_nokey	col_varchar_nokey
SHOW STATUS LIKE "HANDLER_READ%";
Variable_name	Value
Handler_read_first	3
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	3
DROP TABLE t1,t2,t3,t4;
#
# Bug#13727407: Assert !item->const_item() || !item->not_null_tables()
#
CREATE TABLE t1 (
col_int_key INT,
KEY col_int_key (col_int_key)
);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (
col_int_key INT,
col_time_key TIME,
col_datetime_nokey DATETIME,
KEY col_int_key (col_int_key),
KEY col_time_key (col_time_key)
);
INSERT INTO t2 VALUES
(7,'14:03:03','2001-11-28 00:50:27'), (1,'01:46:09','2007-10-09 19:53:04');
EXPLAIN SELECT col_datetime_nokey AS x
FROM t2 AS outr
WHERE col_int_key IN (
SELECT STRAIGHT_JOIN col_int_key
FROM t1
) AND outr.col_int_key = 0
HAVING x = '2000-09-09'
ORDER BY col_time_key;
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	DEPENDENT SUBQUERY	t1	system	col_int_key	NULL	NULL	NULL	1	NULL
SELECT col_datetime_nokey AS x
FROM t2 AS outr
WHERE col_int_key IN (
SELECT STRAIGHT_JOIN col_int_key
FROM t1
) AND outr.col_int_key = 0
HAVING x = '2000-09-09'
ORDER BY col_time_key;
x
DROP TABLE t1, t2;
#
# Bug#13838501 ASSERTION `TABLE->FILE->INITED' FAILED IN
# SUBSELECT_HASH_SJ_ENGINE::EXEC
#
CREATE TABLE t1
(c1 bigint,c2 char,pk INT,c3 char,c4 int,c5 INT,key (c5))
ENGINE=InnoDB;
INSERT INTO t1 VALUES (763078661862588416,0,1,'',1,'');
Warnings:
Warning	1366	Incorrect integer value: '' for column 'c5' at row 1
CREATE TABLE t2 (c4k int,c4 int,cminnuk INT,key (cminnuk)) ENGINE=InnoDB;
INSERT INTO t2 VALUES(0,'','');
Warnings:
Warning	1366	Incorrect integer value: '' for column 'c4' at row 1
Warning	1366	Incorrect integer value: '' for column 'cminnuk' at row 1
CREATE TABLE t3
(c4 int,pk INT,c1 bigint,cyk year,cy year,key (cyk))
ENGINE=InnoDB;
INSERT INTO t3 VALUES(0,8,'',0,'');
Warnings:
Warning	1366	Incorrect integer value: '' for column 'c1' at row 1
Warning	1366	Incorrect integer value: '' for column 'cy' at row 1
EXPLAIN SELECT o.c2 AS x FROM t1 AS o
WHERE o.c1 IN
(SELECT innr.c4 AS y
FROM t2 AS innr2 JOIN t3 AS innr
ON (innr2.c4k=innr.c4)
WHERE innr.c1=6 OR NOT innr.c1=innr.pk
ORDER BY innr.c4)
AND o.c4=7 XOR o.pk=3 ORDER BY o.pk;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	o	ALL	NULL	NULL	NULL	NULL	1	Using where; Using filesort
2	SUBQUERY	innr2	ALL	NULL	NULL	NULL	NULL	1	NULL
2	SUBQUERY	innr	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (Block Nested Loop)
SELECT o.c2 AS x FROM t1 AS o
WHERE o.c1 IN
(SELECT innr.c4 AS y
FROM t2 AS innr2 JOIN t3 AS innr
ON (innr2.c4k=innr.c4)
WHERE innr.c1=6 OR NOT innr.c1=innr.pk
ORDER BY innr.c4)
AND o.c4=7 XOR o.pk=3 ORDER BY o.pk;
x
DROP TABLE t1,t2,t3;
#
# Bug#19297190 NOT IN DOESN'T RETURN EXPECTED RESULT
#
CREATE TABLE t1 (a VARCHAR(500) CHARACTER SET UTF8) ENGINE=INNODB;
SET @str= repeat("a",450);
SET @num=1000;
INSERT INTO t1 VALUES (CONCAT((@num:=@num+1), @str));
INSERT INTO t1 SELECT CONCAT((@num:=@num+1), @str) FROM t1;
INSERT INTO t1 SELECT CONCAT((@num:=@num+1), @str) FROM t1;
INSERT INTO t1 SELECT CONCAT((@num:=@num+1), @str) FROM t1;
INSERT INTO t1 SELECT CONCAT((@num:=@num+1), @str) FROM t1;
INSERT INTO t1 SELECT CONCAT((@num:=@num+1), @str) FROM t1;
SELECT COUNT(*) FROM t1;
COUNT(*)
32
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
set @save_heap_size= @@max_heap_table_size;
set @@max_heap_table_size= 16384;
EXPLAIN SELECT COUNT(*)
FROM t1
WHERE t1.a NOT IN (
SELECT t2.a FROM t1 as t2
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	32	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	32	Using where
SELECT COUNT(*)
FROM t1
WHERE t1.a NOT IN (
SELECT t2.a FROM t1 as t2
);
COUNT(*)
0
ALTER TABLE t1 MODIFY a VARCHAR(332) CHARACTER SET UTF8;
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
EXPLAIN SELECT COUNT(*)
FROM t1
WHERE t1.a NOT IN (
SELECT t2.a FROM t1 as t2
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	32	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	32	NULL
SELECT COUNT(*)
FROM t1
WHERE t1.a NOT IN (
SELECT t2.a FROM t1 as t2
);
COUNT(*)
0
DROP TABLE t1;
set @@max_heap_table_size= @save_heap_size;
# End of 5.6 tests
set @@optimizer_switch=@old_opt_switch;
set optimizer_switch=default;
