subselect_sj_mat.result

set @subselect_sj_mat_tmp= @@optimizer_switch;
set optimizer_switch=ifnull(@subselect_mat_test_optimizer_switch_value, 'semijoin=on,firstmatch=on,loosescan=on,semijoin_with_cache=on');
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
set @optimizer_switch_local_default= @@optimizer_switch;
set @save_join_cache_level=@@join_cache_level;
set join_cache_level=1;
drop table if exists t1, t2, t3, t4, t5, t1i, t2i, t3i;
drop table if exists columns;
drop table if exists t1_16, t2_16, t3_16;
drop view if exists v1, v2, v1m, v2m;
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
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;
set @@optimizer_switch='materialization=on,in_to_exists=off,firstmatch=off';
/******************************************************************************
* Simple tests.
******************************************************************************/
# non-indexed nullable fields
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b1` > '0'))
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b1` > '0'))
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b1` > '0'))
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
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using temporary
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from  <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`) join `test`.`t1` where ((`<subquery2>`.`b1` = `test`.`t1`.`a1`) and (`<subquery2>`.`min(b2)` = `test`.`t1`.`a2`))
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	t2i	index	it2i1,it2i3	it2i1	#	NULL	5	40.00	Using where; Using index; LooseScan
1	PRIMARY	t1i	ref	_it1_idx	_it1_idx	#	_ref_	1	100.00	
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) where ((`test`.`t1i`.`a1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` > '0'))
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 max(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	it1i1,it1i3	#	18	#	3	100.00	#
1	PRIMARY	<subquery2>	eq_ref	distinct_key	#	8	#	1	100.00	#
2	MATERIALIZED	t2i	index	it2i1,it2i3	#	9	#	5	100.00	#
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from  <materialize> (select max(`test`.`t2i`.`b1`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1i` where (`<subquery2>`.`max(b1)` = `test`.`t1i`.`a1`)
select * from t1i where a1 in (select max(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	t2i	index	it2i1,it2i2,it2i3	it2i3	#	NULL	5	40.00	Using where; Using index; LooseScan
1	PRIMARY	t1i	ref	_it1_idx	_it1_idx	#	_ref_	1	100.00	
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) where ((`test`.`t1i`.`a1` = `test`.`t2i`.`b1`) and (`test`.`t1i`.`a2` = `test`.`t2i`.`b2`) and (`test`.`t2i`.`b1` > '0'))
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, max(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	it1i1,it1i2,it1i3	#	#	#	3	100.00	#
1	PRIMARY	<subquery2>	eq_ref	distinct_key	#	#	#	1	100.00	#
2	MATERIALIZED	t2i	range	it2i1,it2i3	#	#	#	3	100.00	#
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from  <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1i` where ((`<subquery2>`.`b1` = `test`.`t1i`.`a1`) and (`<subquery2>`.`max(b2)` = `test`.`t1i`.`a2`))
select * from t1i where (a1, a2) in (select b1, max(b2) 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, 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	it1i1,it1i2,it1i3	#	#	#	3	100.00	#
1	PRIMARY	<subquery2>	eq_ref	distinct_key	#	#	#	1	100.00	#
2	MATERIALIZED	t2i	range	it2i1,it2i3	#	#	#	3	100.00	#
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from  <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1i` where ((`<subquery2>`.`b1` = `test`.`t1i`.`a1`) and (`<subquery2>`.`min(b2)` = `test`.`t1i`.`a2`))
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
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	100.00	
2	MATERIALIZED	t2i	range	NULL	it2i3	9	NULL	3	100.00	Using index for group-by
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from  <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1`) join `test`.`t1` where ((`<subquery2>`.`b1` = `test`.`t1`.`a1`) and (`<subquery2>`.`max(b2)` = `test`.`t1`.`a2`))
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
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	
2	MATERIALIZED	t2i	range	NULL	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
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	
2	MATERIALIZED	t2i	range	NULL	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
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	100.00	
2	MATERIALIZED	t2i	range	it2i1,it2i3	it2i3	18	NULL	3	100.00	Using where; Using index for group-by
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from  <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1` where ((`<subquery2>`.`b1` = `test`.`t1`.`a1`) and (`<subquery2>`.`min(b2)` = `test`.`t1`.`a2`))
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 MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='semijoin=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='materialization=off,in_to_exists=on';
execute st1;
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='semijoin=off';
execute st1;
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='materialization=off,in_to_exists=on';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='semijoin=off';
execute st1;
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='materialization=off,in_to_exists=on';
execute st1;
a1	a2
1 - 01	2 - 01
1 - 02	2 - 02
set @@optimizer_switch=@save_optimizer_switch;
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from  <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2`) join `test`.`t1` where ((`<subquery2>`.`b1` = `test`.`t1`.`a1`) and (`<subquery2>`.`b2` = `test`.`t1`.`a2`))
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	it1i1,it1i2,it1i3	it1i3	18	NULL	3	100.00	Using where; Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1i.a1,test.t1i.a2	1	100.00	
2	MATERIALIZED	t2i	index	NULL	it2i3	18	NULL	5	100.00	Using index
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from  <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2`) join `test`.`t1i` where ((`<subquery2>`.`b1` = `test`.`t1i`.`a1`) and (`<subquery2>`.`b2` = `test`.`t1i`.`a2`))
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	
1	PRIMARY	<subquery3>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
3	MATERIALIZED	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	80.00	Using where; Using index; Using join buffer (flat, BNL join)
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (`test`.`t2`.`b1` > '0') and (`test`.`t3`.`c2` > '0'))
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 >  '0') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
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	t2i	index	it2i1,it2i2,it2i3	#	#	#	5	40.00	#
1	PRIMARY	t1i	ref	it1i1,it1i2,it1i3	#	#	#	1	100.00	#
1	PRIMARY	t3i	ref	it3i1,it3i2,it3i3	#	#	#	1	100.00	#
1	PRIMARY	t2i	ref	it2i1,it2i2,it2i3	#	#	#	2	100.00	#
Warnings:
Note	1003	select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) semi join (`test`.`t2i` join `test`.`t3i`) where ((`test`.`t1i`.`a1` = `test`.`t2i`.`b1`) and (`test`.`t3i`.`c1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` = `test`.`t2i`.`b1`) and (`test`.`t1i`.`a2` = `test`.`t2i`.`b2`) and (`test`.`t3i`.`c2` = `test`.`t2i`.`b2`) and (`test`.`t2i`.`b2` = `test`.`t2i`.`b2`) and (`test`.`t2i`.`b1` > '0') and (`test`.`t2i`.`b2` > '0'))
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
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	
1	PRIMARY	<subquery5>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
5	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
5	MATERIALIZED	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	80.00	Using where; Using index; Using join buffer (flat, BNL join)
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (`test`.`t3`.`c2` > '0'))
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
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	
1	PRIMARY	<subquery5>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
5	MATERIALIZED	t3c	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
5	MATERIALIZED	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	80.00	Using where; Using index; Using join buffer (flat, BNL join)
4	MATERIALIZED	t3b	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
3	DEPENDENT SUBQUERY	t3a	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3` `t3c`) where ((`test`.`t2i`.`b1` = `test`.`t3c`.`c1`) and (`test`.`t2`.`b1` = `test`.`t1`.`a1`) and (`test`.`t2i`.`b2` = `test`.`t3c`.`c2`) and (`test`.`t2`.`b2` = `test`.`t1`.`a2`) and (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select `test`.`t3a`.`c2` from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (`test`.`t3c`.`c2` > '0'))
select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 t3a where c1 = a1) or
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
(a1, a2) in (select c1, c2 from t3 t3c
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
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	#	#	#	3	100.00	#
1	PRIMARY	<subquery5>	eq_ref	distinct_key	#	#	#	1	100.00	#
1	PRIMARY	<subquery2>	eq_ref	distinct_key	#	#	#	1	100.00	#
5	MATERIALIZED	t3	ALL	NULL	#	#	#	4	100.00	#
5	MATERIALIZED	t2i	index	it2i1,it2i2,it2i3	#	#	#	5	80.00	#
2	MATERIALIZED	t2	ALL	NULL	#	#	#	5	100.00	#
4	MATERIALIZED	t3	ALL	NULL	#	#	#	4	100.00	#
3	MATERIALIZED	t3	ALL	NULL	#	#	#	4	100.00	#
7	UNION	t2i	index	it2i1,it2i2,it2i3	#	#	#	5	40.00	#
7	UNION	t1i	ref	it1i1,it1i2,it1i3	#	#	#	1	100.00	#
7	UNION	t3i	ref	it3i1,it3i2,it3i3	#	#	#	1	100.00	#
7	UNION	t2i	ref	it2i1,it2i2,it2i3	#	#	#	2	100.00	#
NULL	UNION RESULT	<union1,7>	ALL	NULL	#	#	#	NULL	NULL	#
Warnings:
Note	1003	(select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (`test`.`t3`.`c2` > '0'))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) semi join (`test`.`t2i` join `test`.`t3i`) where ((`test`.`t1i`.`a1` = `test`.`t2i`.`b1`) and (`test`.`t3i`.`c1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` = `test`.`t2i`.`b1`) and (`test`.`t1i`.`a2` = `test`.`t2i`.`b2`) and (`test`.`t3i`.`c2` = `test`.`t2i`.`b2`) and (`test`.`t2i`.`b2` = `test`.`t2i`.`b2`) and (`test`.`t2i`.`b1` > '0') and (`test`.`t2i`.`b2` > '0')))
(select * from t1
where (a1, a2) in (select b1, b2 from t2
where b2 in (select c2 from t3 where c2 LIKE '%02') or
b2 in (select c2 from t3 where c2 LIKE '%03')
group by b1, b2) and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
(a1, a2) in (select c1, c2 from t3i
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
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
1	PRIMARY	<subquery4>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
4	MATERIALIZED	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	80.00	Using where; Using index; Using join buffer (flat, BNL join)
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	
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and (`test`.`t3`.`c2` > '0'))
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
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 (flat, BNL join)
1	PRIMARY	<subquery4>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
4	MATERIALIZED	t2i	index	it2i1,it2i2,it2i3	it2i3	18	NULL	5	80.00	Using where; Using index; Using join buffer (flat, BNL join)
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	
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) join `test`.`t3` where ((`test`.`t3`.`c1` = `test`.`t1`.`a1`) and (`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and (`test`.`t3`.`c2` > '0'))
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	
Warnings:
Note	1003	select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`>(<in_optimizer>(`test`.`t3`.`c1`,<exists>(select `test`.`t1`.`a1` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1`)) union select `test`.`t2`.`b1` 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
1	PRIMARY	t2i	ref	it2i1,it2i2,it2i3	it2i3	18	test.t1.a1,test.t1.a2	2	100.00	Using index; Start temporary
1	PRIMARY	t3c	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; End temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
4	MATERIALIZED	t3b	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
3	DEPENDENT SUBQUERY	t3a	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
Note	1276	Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3` `t3c`) where ((`test`.`t2i`.`b1` = `test`.`t1`.`a1`) and (`test`.`t3c`.`c1` = `test`.`t1`.`a1`) and (`test`.`t2`.`b1` = `test`.`t1`.`a1`) and (`test`.`t2i`.`b2` = `test`.`t1`.`a2`) and (`test`.`t3c`.`c2` = `test`.`t1`.`a2`) and (`test`.`t2`.`b2` = `test`.`t1`.`a2`) and (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select `test`.`t3a`.`c2` from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))))
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 `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select '1 - 01','2 - 01' having (((<cache>(`test`.`t1`.`a1`) = '1 - 01') or isnull('1 - 01')) and ((<cache>(`test`.`t1`.`a2`) = '2 - 01') or isnull('2 - 01')) and <is_not_null_test>('1 - 01') and <is_not_null_test>('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 `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select '1 - 01','2 - 01' having (((<cache>(`test`.`t1`.`a1`) = '1 - 01') or isnull('1 - 01')) and ((<cache>(`test`.`t1`.`a2`) = '2 - 01') or isnull('2 - 01')) and <is_not_null_test>('1 - 01') and <is_not_null_test>('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	
2	SUBQUERY	columns	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by (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 `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a1`) in columns on PRIMARY where trigcond((<cache>(`test`.`t1`.`a1`) = `test`.`columns`.`col`))))))
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	
2	SUBQUERY	columns	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` order by (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 that BLOBs are not materialized (except when arguments of some functions).
*/
# force materialization to be always considered
set @prefix_len = 6;
set @blob_len = 16;
set @suffix_len = @blob_len - @prefix_len;
create table t1_16 (a1 blob(16), a2 blob(16));
create table t2_16 (b1 blob(16), b2 blob(16));
create table t3_16 (c1 blob(16), c2 blob(16));
insert into t1_16 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t1_16`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t2_16`.`b2` = `test`.`t1_16`.`a2`) and (`test`.`t1_16`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	19	func	1	100.00	Using where
2	MATERIALIZED	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1003	select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` > '0') and (`test`.`t1_16`.`a1` = substr(`test`.`t2_16`.`b1`,1,16)))
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	DEPENDENT SUBQUERY	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,<exists>(select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` having (<cache>(`test`.`t1_16`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_16`.`b1` separator ','))))))
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
set @@group_concat_max_len = 256;
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_16.a1	1	100.00	Using where
2	MATERIALIZED	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2`) join `test`.`t1_16` where (`test`.`t1_16`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended
select * from t1
where concat(a1,'x') IN
(select left(a1,8) from t1_16
where (a1, a2) IN
(select t2_16.b1, t2_16.b2 from t2_16, t2
where t2.b2 = substring(t2_16.b2,1,6) and
t2.b1 IN (select c1 from t3 where c2 > '0')));
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	
1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t3` join `test`.`t2_16` join `test`.`t2` join `test`.`t1_16`) where ((`test`.`t2`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t2_16`.`b2` = `test`.`t1_16`.`a2`) and (`test`.`t2`.`b2` = substr(`test`.`t1_16`.`a2`,1,6)) and (`test`.`t3`.`c2` > '0') and (concat(`test`.`t1`.`a1`,'x') = left(`test`.`t1_16`.`a1`,8)))
drop table t1_16, t2_16, t3_16;
set @blob_len = 512;
set @suffix_len = @blob_len - @prefix_len;
create table t1_512 (a1 blob(512), a2 blob(512));
create table t2_512 (b1 blob(512), b2 blob(512));
create table t3_512 (c1 blob(512), c2 blob(512));
insert into t1_512 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` = `test`.`t1_512`.`a1`) and (`test`.`t1_512`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` = `test`.`t1_512`.`a1`) and (`test`.`t2_512`.`b2` = `test`.`t1_512`.`a2`) and (`test`.`t1_512`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_512	ALL	NULL	NULL	NULL	NULL	3	100.00	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	516	func	1	100.00	Using where
2	MATERIALIZED	t2_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1003	select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` > '0') and (`test`.`t1_512`.`a1` = substr(`test`.`t2_512`.`b1`,1,512)))
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_512.a1	1	100.00	Using where
2	MATERIALIZED	t2_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2`) join `test`.`t1_512` where (`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
left(a1,7)	left(a2,7)
set @@group_concat_max_len = 256;
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_512.a1	1	100.00	Using where
2	MATERIALIZED	t2_512	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2`) join `test`.`t1_512` where (`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);
left(a1,7)	left(a2,7)
drop table t1_512, t2_512, t3_512;
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
create table t3_1024 (c1 blob(1024), c2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` = `test`.`t1_1024`.`a1`) and (`test`.`t1_1024`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` = `test`.`t1_1024`.`a1`) and (`test`.`t2_1024`.`b2` = `test`.`t1_1024`.`a2`) and (`test`.`t1_1024`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	
1	PRIMARY	t2_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` > '0') and (`test`.`t1_1024`.`a1` = substr(`test`.`t2_1024`.`b1`,1,1024)))
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_1024.a1	1	100.00	Using where
2	MATERIALIZED	t2_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2`) join `test`.`t1_1024` where (`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
left(a1,7)	left(a2,7)
set @@group_concat_max_len = 256;
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_1024.a1	1	100.00	Using where
2	MATERIALIZED	t2_1024	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2`) join `test`.`t1_1024` where (`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);
left(a1,7)	left(a2,7)
drop table t1_1024, t2_1024, t3_1024;
set @blob_len = 1025;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1025 (a1 blob(1025), a2 blob(1025));
create table t2_1025 (b1 blob(1025), b2 blob(1025));
create table t3_1025 (c1 blob(1025), c2 blob(1025));
insert into t1_1025 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` = `test`.`t1_1025`.`a1`) and (`test`.`t1_1025`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	t2_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` = `test`.`t1_1025`.`a1`) and (`test`.`t2_1025`.`b2` = `test`.`t1_1025`.`a2`) and (`test`.`t1_1025`.`a1` > '0'))
select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	
1	PRIMARY	t2_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` > '0') and (`test`.`t1_1025`.`a1` = substr(`test`.`t2_1025`.`b1`,1,1025)))
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
1 - 02x	2 - 02x
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_1025.a1	1	100.00	Using where
2	MATERIALIZED	t2_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2`) join `test`.`t1_1025` where (`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
left(a1,7)	left(a2,7)
set @@group_concat_max_len = 256;
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	260	test.t1_1025.a1	1	100.00	Using where
2	MATERIALIZED	t2_1025	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
Warnings:
Note	1003	select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from  <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2`) join `test`.`t1_1025` where (`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`)
select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);
left(a1,7)	left(a2,7)
drop table t1_1025, t2_1025, t3_1025;
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	100.00	
2	MATERIALIZED	t2bit	ALL	NULL	NULL	NULL	NULL	3	100.00	
Warnings:
Note	1003	select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` semi join (`test`.`t2bit`) where 1
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	
1	PRIMARY	t2bb	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select conv(`test`.`t1bb`.`a1`,10,2) AS `bin(a1)`,`test`.`t1bb`.`a2` AS `a2` from `test`.`t1bb` semi join (`test`.`t2bb`) where ((`test`.`t2bb`.`b1` = `test`.`t1bb`.`a1`) and (`test`.`t2bb`.`b2` = `test`.`t1bb`.`a2`))
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	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	6	100.00	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and (`test`.`t2`.`d` >= 20))
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	it1a	it1a	4	NULL	7	100.00	Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` >= 20))
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	it1a	it1a	4	NULL	7	100.00	Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	100.00	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` >= 20))
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	NULL	it1a	4	NULL	7	100.00	Using index
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`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	NULL	it1a	4	NULL	7	100.00	Using index
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`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	NULL	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 `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`,max(`test`.`t1`.`b`),max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`c` from `test`.`t2` where (<nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`,max(`test`.`t1`.`b`),max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` 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	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	Start temporary
1	PRIMARY	t1	ref	it1a,iab	iab	4	test.t2.c	1	100.00	Using where; Using index; End temporary
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 `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`)))))))
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
a
2
2
2
3
1
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 max(b1) from t2 group by b1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	<subquery2>	const	distinct_key	distinct_key	4	const	1	
2	MATERIALIZED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
select min(a1) from t1 where 7 in (select max(b1) from t2 group by b1);
min(a1)
NULL
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='materialization=off,in_to_exists=on';
explain select min(a1) from t1 where 7 in (select max(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	Impossible WHERE
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
select min(a1) from t1 where 7 in (select max(b1) from t2 group by b1);
min(a1)
NULL
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
select min(a1) from t1 where 7 in (select b1 from t2);
min(a1)
NULL
set @@optimizer_switch=@optimizer_switch_local_default;
set @@optimizer_switch='materialization=off,in_to_exists=on';
# with MariaDB and MWL#90, this particular case is solved:
explain select min(a1) from t1 where 7 in (select b1 from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
select min(a1) from t1 where 7 in (select b1 from t2);
min(a1)
NULL
# but when we go around MWL#90 code, the problem still shows up:
explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
min(a1)
NULL
set @@optimizer_switch= @save_optimizer_switch;
drop table t1,t2;
create table t1 (a char(2), b varchar(10));
insert into t1 values ('a',  'aaa');
insert into t1 values ('aa', 'aaaa');
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	2	func	1	Using where
2	MATERIALIZED	t1	ALL	NULL	NULL	NULL	NULL	2	
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;
#
# 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 max(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	
1	PRIMARY	<subquery3>	eq_ref	distinct_key	distinct_key	4	const	1	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	Using temporary
DROP TABLE t1,t2,t3,t4;
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);
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
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>	ALL	NULL	NULL	NULL	NULL	2	
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
3	MATERIALIZED	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
set optimizer_switch=@tmp_optimizer_switch;
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	t1	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	const	1	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t1	system	NULL	NULL	NULL	NULL	1	
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;
CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM;
INSERT INTO t1 (f1, f2) VALUES (1, 1.789);
INSERT INTO t1 (f1, f2) VALUES (13, 1.454);
INSERT INTO t1 (f1, f2) VALUES (10, 1.668);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1, 1.789);
INSERT INTO t2 VALUES (13, 1.454);
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch=@optimizer_switch_local_default;
SET @@optimizer_switch='semijoin=on,materialization=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	2	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
COUNT(*)
2
set @@optimizer_switch= @save_optimizer_switch;
DROP TABLE t1, t2;
CREATE TABLE t1 (
pk int,
a varchar(1),
b varchar(4),
c varchar(4),
d varchar(4),
PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch=@optimizer_switch_local_default;
SET @@optimizer_switch='semijoin=on,materialization=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
2	MATERIALIZED	t2	range	PRIMARY	PRIMARY	4	NULL	2	Using index condition; Rowid-ordered scan
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
pk
2
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
pk
2
DROP TABLE t1, t2;
set optimizer_switch=@save_optimizer_switch;
#
# BUG#50019: Wrong result for IN-subquery with materialization
#
create table t1(i int);
insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
create table t2(i int);
insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
create table t3(i int);
insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
i
1
2
3
4
set @save_optimizer_switch=@@optimizer_switch;
set session optimizer_switch='materialization=off,in_to_exists=on';
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
i
4
3
2
1
set session optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3;
create table t0 (a int);
insert into t0 values (0),(1),(2);
create table t1 (a int);
insert into t1 values (0),(1),(2);
explain select a, a in (select a from t1) from t0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	3	
2	MATERIALIZED	t1	ALL	NULL	NULL	NULL	NULL	3	
select a, a in (select a from t1) from t0;
a	a in (select a from t1)
0	1
1	1
2	1
prepare s from 'select a, a in (select a from t1) from t0';
execute s;
a	a in (select a from t1)
0	1
1	1
2	1
update t1 set a=123;
execute s;
a	a in (select a from t1)
0	0
1	0
2	0
drop table t0, t1;
set optimizer_switch='firstmatch=on';
#
# MWL#90, review feedback: check what happens when the subquery
#   looks like candidate for MWL#90 checking at the first glance
#   but then subselect_hash_sj_engine::init_permanent() discovers
#   that it's not possible to perform duplicate removal for the 
#   selected datatypes, and so materialization isn't applicable after
#   all.
#
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
explain select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1_1024	ALL	NULL	NULL	NULL	NULL	3	Using where
2	DEPENDENT SUBQUERY	t2_1024	ALL	NULL	NULL	NULL	NULL	3	Using where
select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
left(a1,7)	left(a2,7)
1 - 01x	2 - 01x
drop table t1_1024, t2_1024;
#
# BUG##836491: Crash in Item_field::Item_field from add_ref_to_table_cond() with semijoin+materialization
#
CREATE TABLE t1 (c int, d varchar(1), KEY(d)) ;
INSERT INTO t1 VALUES (2,'x'),(2,'x'),(2,'j'),(2,'c');
CREATE TABLE t2 (a int, d varchar(1)) ;
INSERT INTO t2 VALUES (1,'x');
CREATE TABLE t3 (d varchar(1)) ;
INSERT INTO t3 VALUES ('x'),('x'),('j'),('c');
SELECT t2.a, t1.c
FROM t1, t2
WHERE t2.d IN ( SELECT d FROM t3 )
AND t1.d = t2.d
GROUP BY 1 , 2;
a	c
1	2
drop table t1,t2,t3;
#
# BUG#836523: Crash in JOIN::get_partial_cost_and_fanout with semijoin+materialization 
#
CREATE TABLE t1 (a varchar(1));
INSERT INTO t1 VALUES ('a'),('a');
CREATE TABLE t2 (a varchar(1));
CREATE TABLE t3 (a int);
INSERT INTO t3 VALUES (1),(2);
CREATE TABLE t4 (a varchar(1));
INSERT INTO t4 VALUES ('a'),('a');
SELECT t1.a
FROM t1
WHERE t1.a IN (
SELECT t2.a
FROM t2, t3
)
HAVING a IN (
SELECT a
FROM t4
);
a
DROP TABLE t1, t2, t3, t4;
#
# BUG#836507: Crash in setup_sj_materialization_part1() with semijoin+materialization
#
CREATE TABLE t1 (a int) ;
INSERT IGNORE INTO t1 VALUES (1),(1);
CREATE TABLE t2 (a int);
INSERT INTO t2 VALUES (1);
CREATE TABLE t3 (a int);
CREATE TABLE t4 (a int);
INSERT INTO t4 VALUES (2),(2);
CREATE TABLE t5 (a int);
INSERT INTO t5 VALUES (1);
SELECT * FROM t1
WHERE (a) IN (
SELECT t5.a
FROM (
t2
LEFT JOIN ( t3 , t4 )
ON 1 = 1
)
JOIN t5
);
a
1
1
DROP TABLE t1,t2,t3,t4,t5;
#
# BUG#836532: Crash in Item_equal_fields_iterator::get_curr_field with semijoin+materialization
#
CREATE TABLE t2 (a int);
INSERT INTO t2 VALUES ('a'),('a');
Warnings:
Warning	1366	Incorrect integer value: 'a' for column 'a' at row 1
Warning	1366	Incorrect integer value: 'a' for column 'a' at row 2
CREATE TABLE t4 (a varchar(1));
INSERT INTO t4 VALUES ('m'),('o');
CREATE TABLE t3 (a varchar(1) , b varchar(1) ) ;
INSERT INTO t3 VALUES ('b','b');
CREATE TABLE t5 (a varchar(1), KEY (a)) ;
INSERT INTO t5 VALUES ('d'),('e');
SELECT *
FROM t2
WHERE t2.a = ALL (
SELECT t4.a
FROM t4
WHERE t4.a IN (
SELECT t3.a
FROM t3 , t5
WHERE ( t5.a = t3.b )
)
);
a
0
0
DROP TABLE t2,t3,t4,t5;
#
# BUG#860300: Second crash with get_fanout_with_deps() with semijoin + materialization
#
set @tmp_860300=@@optimizer_switch;
set optimizer_switch='semijoin=on,materialization=on,loosescan=off,firstmatch=off';
CREATE TABLE t1 (f2 int);
INSERT INTO t1 VALUES (9),(6);
CREATE TABLE t3 (f4 int);
CREATE TABLE t4 (f6 varchar(1));
SELECT *
FROM t3
WHERE 'h' IN (SELECT f6 
FROM t4
WHERE 5 IN (SELECT f2 FROM t1)
GROUP BY t4.f6);
f4
DROP TABLE t1,t3,t4;
set optimizer_switch=@tmp_860300;
#
# BUG#860535: Assertion `keypart_map' failed in mi_rkey with semijoin
#
set @tmp_860535=@@optimizer_switch;
set optimizer_switch='semijoin=on,materialization=on,loosescan=off,firstmatch=off';
CREATE TABLE t1 (f3 int) ;
INSERT INTO t1 VALUES (1),(7);
CREATE TABLE t2 (f3 int , f5 varchar(1), KEY (f3)) ;
INSERT INTO t2 VALUES (7,'b');
CREATE TABLE t3 (f3 int , f4 varchar(1) , KEY(f3), KEY (f4,f3)) ;
INSERT INTO t3 VALUES (1,'t'),(7,'g');
CREATE TABLE t4
SELECT f3
FROM t1 WHERE ( f3 ) NOT IN (
SELECT f3
FROM t2
WHERE f5 IN (
SELECT f4
FROM t3
WHERE t3.f3 < 3
)
);
SELECT * FROM t4;
f3
1
7
DROP TABLE t1, t2, t3, t4;
set optimizer_switch=@tmp_860535;
#
# BUG#860553: Crash in create_ref_for_key with semijoin + materialization 
#
CREATE TABLE t1 (f1 int) ;
CREATE TABLE t2 (f5 varchar(52) NOT NULL) ;
CREATE TABLE t3 (f1 varchar(3), f4 varchar(52) , KEY (f4), PRIMARY KEY (f1));
CREATE TABLE t4 (f3 int, KEY (f3));
INSERT INTO t4 VALUES (17),(20);
CREATE TABLE t5 (f2 int);
INSERT INTO t5 VALUES (0),(0);
SELECT *
FROM t1
JOIN t2
ON ( t2.f5 ) IN (
SELECT t3.f4
FROM t3
WHERE ( 1 ) IN (
SELECT t4.f3
FROM t4 , t5
)
);
f1	f5
DROP TABLE t1, t2, t3, t4, t5;
#
# BUG#868908: Crash in check_simple_equality() with semijoin + materialization + prepared statement
#
CREATE TABLE t1 ( a int );
CREATE TABLE t3 ( b int, c int) ;
CREATE TABLE t2 ( a int ) ;
CREATE TABLE t4 ( a int , c int) ;
PREPARE st1 FROM "
SELECT STRAIGHT_JOIN *
FROM t1
WHERE ( 3 ) IN (
        SELECT t3.b
        FROM t3
        LEFT JOIN (
                t2 STRAIGHT_JOIN t4 ON ( t4.c = t2.a )
        ) ON ( t4.a = t3.c )
);
";
EXECUTE st1;
a
EXECUTE st1;
a
DROP TABLE t1,t2,t3,t4;
#
# BUG#901032: Wrong result for MIN/MAX on an indexed column with materialization and semijoin
#
CREATE TABLE t1 ( a INT, KEY(a) );
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 ( b INT );
INSERT INTO t2 VALUES (2);
CREATE TABLE t3 ( c INT );
INSERT INTO t3 VALUES (2);
SELECT MIN(a) FROM t1, t2 WHERE b IN (SELECT c FROM t3 GROUP BY c);
MIN(a)
1
DROP TABLE t1,t2,t3;
#
#
# BUG#902632: Crash or invalid read at st_join_table::cleanup, st_table::disable_keyread
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
CREATE TABLE t2 ( b INT );
INSERT INTO t2 VALUES (3), (4);
CREATE TABLE t3 ( c INT );
INSERT INTO t3 VALUES (5), (6);
SELECT * FROM t1 WHERE EXISTS (
SELECT DISTINCT b FROM t2
WHERE b <= a
AND b IN ( SELECT c FROM t3 GROUP BY c )
);
a
DROP TABLE t1,t2,t3;
#
# BUG#901506: Crash in TABLE_LIST::print on EXPLAIN EXTENDED
#
CREATE TABLE t1 ( a INT, KEY(a) );
INSERT INTO t1 VALUES (8);
EXPLAIN EXTENDED
SELECT * FROM t1
WHERE a IN ( SELECT MIN(a) FROM t1 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	a	NULL	NULL	NULL	1	100.00	
1	PRIMARY	<subquery2>	system	NULL	NULL	NULL	NULL	1	100.00	
2	MATERIALIZED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	select 8 AS `a` from dual where 1
DROP TABLE t1;
#
# BUG#904432: Wrong result with LEFT JOIN, constant table, semijoin=ON,materialization=ON
#
CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
INSERT INTO t1 VALUES (4);
CREATE TABLE t2 ( b INT NOT NULL, c INT );
INSERT INTO t2 VALUES (4,2),(4,2),(4,4),(1,1);
SELECT * FROM t1 LEFT JOIN t2 ON ( a = b )
WHERE a IN ( SELECT c FROM t2 );
a	b	c
4	4	2
4	4	2
4	4	4
DROP TABLE t1,t2;
#
# BUG#922254: Assertion `0' failed at item_cmpfunc.cc:5899: Item* Item_equal::get_first(JOIN_TAB*, Item*)
#
CREATE TABLE t1 ( a VARCHAR(3) );
CREATE TABLE t2 ( b VARCHAR(3), c VARCHAR(8), KEY(c) );
INSERT INTO t2 VALUES ('USA','Abilene'),('USA','Akron');
EXPLAIN
SELECT * FROM
( SELECT * FROM t1 ) AS alias1,
t2 AS alias2
WHERE b = a AND a IN (
SELECT alias3.c
FROM t2 AS alias3, t2 AS alias4
WHERE alias4.c = alias3.b
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
DROP TABLE t1,t2;
#
# BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result
#
create table t1 (a int, b int);
insert into t1 values (7,5), (3,3), (5,4), (9,3);
create table t2 (a int, b int, index i_a(a));
insert into t2 values
(4,2), (7,9), (7,4), (3,1), (5,3), (3,1), (9,4), (8,1);
explain select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
2	MATERIALIZED	t2	ALL	i_a	NULL	NULL	NULL	8	Using where
select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
a	b
7	5
3	3
drop table t1,t2;
#
# BUG#933407: Valgrind warnings in mark_as_null_row with materialization+semijoin, STRAIGHT_JOIN, impossible WHERE
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (0),(8);
SELECT STRAIGHT_JOIN MIN(a) FROM t1
WHERE a IN (
SELECT a FROM t1
WHERE 'condition'='impossible'
  );
MIN(a)
NULL
DROP TABLE t1;
#
# BUG#938131: Subquery materialization is not used in CREATE TABLE SELECT
# 
CREATE TABLE t1(a int);
INSERT INTO t1 values(1),(2);
CREATE TABLE t2(a int);
INSERT INTO t2 values(1),(2);
# Should use Materialization:
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 GROUP BY a HAVING a > 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	test.t1.a	1	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	Using temporary
flush status;
CREATE TABLE t3 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 GROUP BY a HAVING a > 1);
SHOW STATUS LIKE 'Created_tmp_tables';
Variable_name	Value
Created_tmp_tables	2
DROP TABLE t1,t2,t3;
# 
# BUG#939009: Crash with aggregate function in IN subquery 
#
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='materialization=on,semijoin=on';
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (7,1), (4,2), (7,7);
CREATE TABLE t2 ( c INT );
INSERT INTO t2 VALUES (4), (7), (6);
EXPLAIN EXTENDED
SELECT * FROM t1
WHERE a IN (SELECT MAX(c) FROM t2) AND b=7 AND (a IS NULL OR a=b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<subquery2>	const	distinct_key	distinct_key	4	const	1	100.00	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from  <materialize> (select max(`test`.`t2`.`c`) from `test`.`t2`) join `test`.`t1` where ((`test`.`t1`.`b` = 7) and (`test`.`t1`.`a` = `<subquery2>`.`MAX(c)`) and (<cache>(isnull(`<subquery2>`.`MAX(c)`)) or (`<subquery2>`.`MAX(c)` = 7)))
SELECT * FROM t1
WHERE a IN (SELECT MAX(c) FROM t2) AND b=7 AND (a IS NULL OR a=b);
a	b
7	7
EXPLAIN
SELECT * FROM t1
WHERE a IN (SELECT MAX(c) FROM t2 WHERE c < 4) AND b=7 AND (a IS NULL OR a=b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<subquery2>	const	distinct_key	distinct_key	4	const	1	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
SELECT * FROM t1
WHERE a IN (SELECT MAX(c) FROM t2 WHERE c < 4) AND b=7 AND (a IS NULL OR a=b);
a	b
SET optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2;
# 
# BUG#946055: Crash with semijoin IN subquery when hash join is used
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (7);
CREATE TABLE t2 (b int, c int, d varchar(1), e varchar(1), KEY (c), KEY (d, c));
INSERT INTO t2 VALUES 
(4,2,'v','v'), (6,1,'v','v'), (0,5,'x','x'), (7,1,'x','x'),
(7,3,'i','i'), (7,1,'e','e'), (1,4,'p','p'), (1,2,'j','j');
SET @save_optimizer_switch=@@optimizer_switch;
SET @save_join_cache_level=@@join_cache_level;
SET join_cache_level=2;
EXPLAIN
SELECT a, c FROM t1, t2
WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t2	index	c	c	5	NULL	8	Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	
2	MATERIALIZED	s2	ref	d	d	4	const	2	Using where; Using index
2	MATERIALIZED	s1	ALL	c	NULL	NULL	NULL	8	Using where; Using join buffer (flat, BNL join)
3	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	8	
SELECT a, c FROM t1, t2
WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2));
a	c
7	1
7	1
7	1
SET optimizer_switch='join_cache_hashed=on';
SET join_cache_level=4;
EXPLAIN
SELECT a, c FROM t1, t2
WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t2	index	c	c	5	NULL	8	Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	
2	MATERIALIZED	s2	ref	d	d	4	const	2	Using where; Using index
2	MATERIALIZED	s1	hash_ALL	c	#hash#$hj	5	const	8	Using where; Using join buffer (flat, BNLH join)
3	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	8	
SELECT a, c FROM t1, t2
WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2));
a	c
7	1
7	1
7	1
SET optimizer_switch=@save_optimizer_switch;
SET join_cache_level=@save_join_cache_level;
DROP TABLE t1,t2;
#
# BUG#952297: Server crashes on 2nd execution of PS in Field::is_null with semijoin+materialization
#
CREATE TABLE t1 ( a VARCHAR(1) );
INSERT INTO t1 VALUES ('y'),('z');
CREATE TABLE t2 ( b VARCHAR(1), c VARCHAR(1) );
INSERT INTO t2 VALUES ('v','v'),('v','v');
CREATE VIEW v2 AS SELECT * FROM t2;
PREPARE ps FROM '
SELECT a FROM t1, v2
WHERE ( c, b ) IN ( SELECT b, b FROM t2 )
GROUP BY a ';
EXECUTE ps;
a
y
z
EXECUTE ps;
a
y
z
DROP VIEW v2;
DROP TABLE t1, t2;
#
# BUG#1000269: Wrong result (extra rows) with semijoin+materialization, IN subqueries, join_cache_level>0
#
CREATE TABLE t1 (a1 VARCHAR(1), a2 VARCHAR(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('b','b'),('e','e');
CREATE TABLE t2 (b1 VARCHAR(1), b2 VARCHAR(1), KEY(b1)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('v','v'),('s','s'),('l','l'), ('y','y'),('c','c'),('i','i');
SELECT * FROM t1, t2 WHERE b1 IN ( SELECT b2 FROM t2 WHERE b1 > 'o' ) AND ( b1 < 'l' OR a1 IN ('b','c') );
a1	a2	b1	b2
b	b	v	v
b	b	s	s
b	b	y	y
DROP TABLE t1,t2;
#
# MDEV-4465: Reproducible crash (mysqld got signal 11) in multi_delete::initialize_tables with semijoin+materialization
#
CREATE TABLE t1 (
id int(11) NOT NULL
);
CREATE TABLE t2 (
id   int(11) NOT NULL,
a_id int(11) DEFAULT NULL
);
insert into t1 values (1), (2), (3);
insert into t2 values (1, 1), (2, 1), (3, 1), (4, 2), (5, 3), (6, 3), (7, 3);
delete t2 from t2 where a_id in (select * from (select t1.id from t1 limit 2) as x);
drop table t1,t2;
# This must be at the end:
set optimizer_switch=@subselect_sj_mat_tmp;
set join_cache_level=@save_join_cache_level;
#
# MDEV-4908: Assertion `((Item_cond *) cond)->functype() == 
# ((Item_cond *) new_item)->functype()' fails on a query with
# IN and equal conditions, AND/OR, materialization+semijoin
# 
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch = 'materialization=on,semijoin=on';
CREATE TABLE t1 (pk INT, a INT, b INT, PRIMARY KEY(pk)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,3,5),(2,4,6);
SELECT * FROM t1 WHERE 8 IN ( SELECT MIN(pk) FROM t1 ) AND ( pk = a OR pk = b );
pk	a	b
drop table t1;
SET optimizer_switch=@save_optimizer_switch;
#
# MDEV-5011: ERROR Plugin 'MEMORY' has ref_count=1 after shutdown for SJM queries
#
CREATE TABLE t1 (pk INT, a INT, b INT, PRIMARY KEY(pk)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,3,5),(2,4,6);
SELECT * FROM t1 WHERE 8 IN (SELECT MIN(pk) FROM t1) AND (pk = a OR pk = b);
pk	a	b
DROP TABLE t1;
# End of 5.3 tests
#
# MDEV-5056: Wrong result (extra rows) with materialization+semijoin, IN subqueries
#
set @tmp_mdev5056=@@join_cache_level;
SET join_cache_level = 2;
CREATE TABLE t1 ( c1 VARCHAR(2), c2 VARCHAR(2), INDEX(c1) ) ENGINE=MyISAM;
INSERT INTO t1 VALUES 
('JP','OM'),('VA','JP'),('CA','ML'),('ML','EG'),('DK','CA'),
('DK','QA'),('YE','PL'),('TR','ZW'),('DK','SK'),('SK','DK'),
('RO','ML'),('ML','BG'),('BG','ZW'),('ZW','GE'),('GE','JP'),
('PL','EG'),('QA','YE'),('WF','DK'),('DK','JP'),('EG','OM');
CREATE TABLE t2 ( c3 VARCHAR(2), c4 VARCHAR(2) ) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('CA','ML'),('IN','HU'),('HU','IN');
SELECT * FROM t1 AS alias1, t1 AS alias2 
WHERE ( alias2.c2, alias1.c1 ) IN ( SELECT c4, c3 FROM t2 ) AND alias1.c1 IN ( SELECT c2 FROM t1 );
c1	c2	c1	c2
CA	ML	CA	ML
CA	ML	RO	ML
DROP TABLE t1,t2;
set join_cache_level=@tmp_mdev5056;
# End of 5.5 tests