set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='optimize_join_buffer_size=on';
set @@optimizer_switch='semijoin_with_cache=on';
set @@optimizer_switch='outer_join_with_cache=on';
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
set join_cache_level=6;
show variables like 'join_cache_level';
Variable_name	Value
join_cache_level	6
set @join_cache_level_for_subselect3_test=@@join_cache_level;
drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22;
set @subselect3_tmp= @@optimizer_switch;
set optimizer_switch='semijoin=on,firstmatch=on,loosescan=on,semijoin_with_cache=on';
set join_cache_level=@join_cache_level_for_subselect3_test;
create table t1 (oref int, grp int, ie int) ;
insert into t1 (oref, grp, ie) values
(1, 1, 1),
(1, 1, 1),
(1, 2, NULL),
(2, 1, 3),
(3, 1, 4),
(3, 2, NULL);
create table t2 (oref int, a int);
insert into t2 values 
(1, 1),
(2, 2),
(3, 3),
(4, NULL),
(2, NULL);
select a, oref, a in (select max(ie) 
from t1 where oref=t2.oref group by grp) Z from t2;
a	oref	Z
1	1	1
2	2	0
3	3	NULL
NULL	4	0
NULL	2	NULL
explain extended
select a, oref, a in (select max(ie) 
from t1 where oref=t2.oref group by grp) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where; Using temporary
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select max(`test`.`t1`.`ie`) from `test`.`t1` where `test`.`t1`.`oref` = `test`.`t2`.`oref` group by `test`.`t1`.`grp` having trigcond(<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `Z` from `test`.`t2`
explain extended
select a, oref from t2 
where a in (select max(ie) from t1 where oref=t2.oref group by grp);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where; Using temporary
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select max(`test`.`t1`.`ie`) from `test`.`t1` where `test`.`t1`.`oref` = `test`.`t2`.`oref` group by `test`.`t1`.`grp` having <cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))
select a, oref, a in (
select max(ie) from t1 where oref=t2.oref group by grp union
select max(ie) from t1 where oref=t2.oref group by grp
) Z from t2;
a	oref	Z
1	1	1
2	2	0
3	3	NULL
NULL	4	0
NULL	2	NULL
create table t3 (a int);
insert into t3 values (NULL), (NULL);
flush status;
select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
a in (select max(ie) from t1 where oref=4 group by grp)
0
0
show status like 'Handler_read_rnd_next';
Variable_name	Value
Handler_read_rnd_next	11
select ' ^ This must show 11' Z;
Z
 ^ This must show 11
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select max(`test`.`t1`.`ie`) from `test`.`t1` where `test`.`t1`.`oref` = 4 group by `test`.`t1`.`grp` having trigcond(<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3`
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3;
create table t1 (a int, oref int, key(a));
insert into t1 values 
(1, 1),
(1, NULL),
(2, 3),
(2, NULL),
(3, NULL);
insert into t1 values (5, 7), (8, 9), (4, 1);
create table t2 (a int, oref int);
insert into t2 values (1, 1), (2,2), (NULL, 3), (NULL, 4);
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
oref	a	Z
1	1	1
2	2	0
3	NULL	NULL
4	NULL	0
explain extended 
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	100.00	
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	2	100.00	Using where; Full scan on NULL key
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` having trigcond(`test`.`t1`.`a` is null))))) AS `Z` from `test`.`t2`
flush status;
select oref, a from t2 where a in (select a from t1 where oref=t2.oref);
oref	a
1	1
show status like '%Handler_read_rnd_next';
Variable_name	Value
Handler_read_rnd_next	5
delete from t2;
insert into t2 values (NULL, 0),(NULL, 0), (NULL, 0), (NULL, 0);
set optimizer_switch='subquery_cache=off';
flush status;
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
oref	a	Z
0	NULL	0
0	NULL	0
0	NULL	0
0	NULL	0
show status like '%Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_retry	0
Handler_read_rnd	0
Handler_read_rnd_deleted	0
Handler_read_rnd_next	41
select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z;
Z
No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2;
create table t1 (a int, b int, primary key (a));
insert into t1 values (1,1), (3,1),(100,1);
create table t2 (a int, b int);
insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
a	b	Z
1	1	1
2	1	0
NULL	1	NULL
NULL	0	0
drop table t1, t2;
create table t1 (a int, b int, key(a));
insert into t1 values 
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
create table t2 like t1;
insert into t2 select * from t1;
update t2 set b=1;
create table t3 (a int, oref int);
insert into t3 values (1, 1), (NULL,1), (NULL,0);
select a, oref, 
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z 
from t3;
a	oref	Z
1	1	1
NULL	1	NULL
NULL	0	0
explain extended
select a, oref, 
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z 
from t3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	DEPENDENT SUBQUERY	t1	ref_or_null	a	a	5	func	4	100.00	Using where; Full scan on NULL key
2	DEPENDENT SUBQUERY	t2	ref	a	a	5	test.t1.b	1	100.00	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
Warnings:
Note	1276	Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`b` = `test`.`t3`.`oref` and trigcond(<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) and `test`.`t2`.`a` = `test`.`t1`.`b` having trigcond(`test`.`t1`.`a` is null)))) AS `Z` from `test`.`t3`
drop table t1, t2, t3;
create table t1 (a int NOT NULL, b int NOT NULL, key(a));
insert into t1 values 
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
create table t2 like t1;
insert into t2 select * from t1;
update t2 set b=1;
create table t3 (a int, oref int);
insert into t3 values (1, 1), (NULL,1), (NULL,0);
select a, oref, 
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z 
from t3;
a	oref	Z
1	1	1
NULL	1	NULL
NULL	0	0
This must show a trig_cond:
explain extended
select a, oref, 
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z 
from t3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	DEPENDENT SUBQUERY	t1	ref	a	a	4	func	2	100.00	Using where; Full scan on NULL key
2	DEPENDENT SUBQUERY	t2	ref	a	a	4	test.t1.b	1	100.00	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
Warnings:
Note	1276	Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`b` = `test`.`t3`.`oref` and trigcond(<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) and `test`.`t2`.`a` = `test`.`t1`.`b`))) AS `Z` from `test`.`t3`
drop table t1,t2,t3;
create table t1 (oref int, grp int);
insert into t1 (oref, grp) values
(1, 1),
(1, 1);
create table t2 (oref int, a int);
insert into t2 values 
(1, NULL),
(2, NULL);
select a, oref, 
a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
a	oref	Z
NULL	1	NULL
NULL	2	0
This must show a trig_cond:
explain extended
select a, oref, 
a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1276	Field or reference 't2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select count(0) from `test`.`t1` group by `test`.`t1`.`grp` having `test`.`t1`.`grp` = `test`.`t2`.`oref` and trigcond(<cache>(`test`.`t2`.`a`) = <ref_null_helper>(count(0)))))) AS `Z` from `test`.`t2`
drop table t1, t2;
create table t1 (a int, b int, primary key (a));
insert into t1 values (1,1), (3,1),(100,1);
create table t2 (a int, b int);
insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
select a,b, a in (select a from t1 where t1.b = t2.b union select a from
t1 where t1.b = t2.b) Z from t2 ;
a	b	Z
1	1	1
2	1	0
NULL	1	NULL
NULL	0	0
select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
a	b	Z
1	1	1
2	1	0
NULL	1	NULL
NULL	0	0
drop table t1, t2;
create table t3 (a int);
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, b int, oref int);
insert into t2 values (NULL,1, 100), (NULL,2, 100);
create table t1 (a int, b int, c int, key(a,b));
insert into t1 select 2*A, 2*A, 100 from t3;
explain extended select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	2	100.00	Using where; Full scan on NULL key
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`c` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b` or `test`.`t1`.`b` is null)) having trigcond(`test`.`t1`.`a` is null) and trigcond(`test`.`t1`.`b` is null))))) AS `Z` from `test`.`t2`
select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
a	b	oref	Z
NULL	1	100	0
NULL	2	100	NULL
create table t4 (x int);
insert into t4 select A.a + 10*B.a from t1 A, t1 B;
explain extended 
select a,b, oref, 
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z 
from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	ref_or_null	a	a	5	func	2	100.00	Using where; Full scan on NULL key
2	DEPENDENT SUBQUERY	t4	ALL	NULL	NULL	NULL	NULL	100	100.00	Using join buffer (flat, BNL join)
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(/* select#2 */ select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where `test`.`t1`.`c` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b` or `test`.`t1`.`b` is null)) having trigcond(`test`.`t1`.`a` is null) and trigcond(`test`.`t1`.`b` is null)))) AS `Z` from `test`.`t2`
select a,b, oref, 
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z 
from t2;
a	b	oref	Z
NULL	1	100	0
NULL	2	100	NULL
drop table t1,t2,t3,t4;
create table t1 (oref char(4), grp int, ie1 int, ie2 int);
insert into t1 (oref, grp, ie1, ie2) values
('aa', 10, 2, 1),
('aa', 10, 1, 1),
('aa', 20, 2, 1),
('bb', 10, 3, 1),
('cc', 10, 4, 2),
('cc', 20, 3, 2),
('ee', 10, 2, 1),
('ee', 10, 1, 2),
('ff', 20, 2, 2),
('ff', 20, 1, 2);
create table t2 (oref char(4), a int, b int);
insert into t2 values 
('ee', NULL, 1),
('bb', 2, 1),
('ff', 2, 2),
('cc', 3, NULL),
('bb', NULL, NULL),
('aa', 1, 1),
('dd', 1, NULL);
alter table t1 add index idx(ie1,ie2);
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=3 and b is null ;
oref	a	b	Z
cc	3	NULL	NULL
insert into t2 values ('new1', 10,10);
insert into t1 values ('new1', 1234, 10, NULL);
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10 and b=10;
oref	a	b	Z
new1	10	10	NULL
explain extended
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10 and b=10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
2	DEPENDENT SUBQUERY	t1	index_subquery	idx	idx	5	func	4	100.00	Using where; Full scan on NULL key
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on idx checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`ie1` or `test`.`t1`.`ie1` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`ie2` or `test`.`t1`.`ie2` is null)) having trigcond(`test`.`t1`.`ie1` is null) and trigcond(`test`.`t1`.`ie2` is null))))) AS `Z` from `test`.`t2` where `test`.`t2`.`a` = 10 and `test`.`t2`.`b` = 10
drop table t1, t2;
create table t1 (oref char(4), grp int, ie int);
insert into t1 (oref, grp, ie) values
('aa', 10, 2),
('aa', 10, 1),
('aa', 20, NULL),
('bb', 10, 3),
('cc', 10, 4),
('cc', 20, NULL),
('ee', 10, NULL),
('ee', 10, NULL),
('ff', 20, 2),
('ff', 20, 1);
create table t2 (oref char(4), a int);
insert into t2 values 
('ee', NULL),
('bb', 2),
('ff', 2),
('cc', 3),
('aa', 1),
('dd', NULL),
('bb', NULL);
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
oref	a	Z
ee	NULL	NULL
bb	2	0
ff	2	1
cc	3	NULL
aa	1	1
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
oref	a
aa	1
ff	2
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
oref	a
bb	2
dd	NULL
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
oref	a	Z
ee	NULL	NULL
bb	2	0
ff	2	0
cc	3	NULL
aa	1	1
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where 
a in (select min(ie) from t1 where oref=t2.oref group by grp);
oref	a
aa	1
select oref, a from t2 where 
a not in (select min(ie) from t1 where oref=t2.oref group by grp);
oref	a
bb	2
ff	2
dd	NULL
update t1 set ie=3 where oref='ff' and ie=1;
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by
grp) Z from t2;
oref	a	Z
ee	NULL	NULL
bb	2	0
ff	2	1
cc	3	NULL
aa	1	1
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where a in (select min(ie) from t1 where
oref=t2.oref group by grp);
oref	a
ff	2
aa	1
select oref, a from t2 where a not in (select min(ie) from t1 where
oref=t2.oref group by grp);
oref	a
bb	2
dd	NULL
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by
grp having min(ie) > 1) Z from t2;
oref	a	Z
ee	NULL	0
bb	2	0
ff	2	1
cc	3	0
aa	1	0
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where a in (select min(ie) from t1 where
oref=t2.oref group by grp having min(ie) > 1);
oref	a
ff	2
select oref, a from t2 where a not in (select min(ie) from t1 where
oref=t2.oref group by grp having min(ie) > 1);
oref	a
ee	NULL
bb	2
cc	3
aa	1
dd	NULL
alter table t1 add index idx(ie);
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	
2	DEPENDENT SUBQUERY	t1	index_subquery	idx	idx	5	func	4	Using where; Full scan on NULL key
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
oref	a	Z
ee	NULL	NULL
bb	2	0
ff	2	1
cc	3	NULL
aa	1	1
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
oref	a
aa	1
ff	2
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
oref	a
bb	2
dd	NULL
alter table t1 drop index idx;
alter table t1 add index idx(oref,ie);
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	
2	DEPENDENT SUBQUERY	t1	ref_or_null	idx	idx	10	test.t2.oref,func	4	Using where; Using index; Full scan on NULL key
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
oref	a	Z
ee	NULL	NULL
bb	2	0
ff	2	1
cc	3	NULL
aa	1	1
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
oref	a
ff	2
aa	1
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
oref	a
bb	2
dd	NULL
explain 
select oref, a, 
a in (select min(ie) from t1 where oref=t2.oref 
group by grp having min(ie) > 1) Z 
from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	
2	DEPENDENT SUBQUERY	t1	ref	idx	idx	5	test.t2.oref	2	Using where; Using temporary
select oref, a, 
a in (select min(ie) from t1 where oref=t2.oref 
group by grp having min(ie) > 1) Z 
from t2;
oref	a	Z
ee	NULL	0
bb	2	0
ff	2	1
cc	3	0
aa	1	0
dd	NULL	0
bb	NULL	NULL
select oref, a from t2 where a in (select min(ie) from t1 where oref=t2.oref 
group by grp having min(ie) > 1);
oref	a
ff	2
select oref, a from t2 where a not in (select min(ie) from t1 where oref=t2.oref 
group by grp having min(ie) > 1);
oref	a
ee	NULL
bb	2
cc	3
aa	1
dd	NULL
drop table t1,t2;
create table t1 (oref char(4), grp int, ie1 int, ie2 int);
insert into t1 (oref, grp, ie1, ie2) values
('aa', 10, 2, 1),
('aa', 10, 1, 1),
('aa', 20, 2, 1),
('bb', 10, 3, 1),
('cc', 10, 4, 2),
('cc', 20, 3, 2),
('ee', 10, 2, 1),
('ee', 10, 1, 2),
('ff', 20, 2, 2),
('ff', 20, 1, 2);
create table t2 (oref char(4), a int, b int);
insert into t2 values 
('ee', NULL, 1),
('bb', 2, 1),
('ff', 2, 2),
('cc', 3, NULL),
('bb', NULL, NULL),
('aa', 1, 1),
('dd', 1, NULL);
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
oref	a	b	Z
ee	NULL	1	NULL
bb	2	1	0
ff	2	2	1
cc	3	NULL	NULL
bb	NULL	NULL	NULL
aa	1	1	1
dd	1	NULL	0
select oref, a, b from t2 where (a,b) in (select ie1,ie2 from t1 where oref=t2.oref);
oref	a	b
aa	1	1
ff	2	2
select oref, a, b from t2 where (a,b) not in (select ie1,ie2 from t1 where oref=t2.oref);
oref	a	b
bb	2	1
dd	1	NULL
select oref, a, b, 
(a,b) in (select min(ie1),max(ie2) from t1 
where oref=t2.oref group by grp) Z 
from t2;
oref	a	b	Z
ee	NULL	1	0
bb	2	1	0
ff	2	2	0
cc	3	NULL	NULL
bb	NULL	NULL	NULL
aa	1	1	1
dd	1	NULL	0
select oref, a, b from t2 where 
(a,b) in (select min(ie1), max(ie2) from t1 where oref=t2.oref group by grp);
oref	a	b
aa	1	1
select oref, a, b from t2 where
(a,b) not in (select min(ie1), max(ie2) from t1 where oref=t2.oref group by grp);
oref	a	b
ee	NULL	1
bb	2	1
ff	2	2
dd	1	NULL
alter table t1 add index idx(ie1,ie2);
explain select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	
2	DEPENDENT SUBQUERY	t1	index_subquery	idx	idx	5	func	4	Using where; Full scan on NULL key
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
oref	a	b	Z
ee	NULL	1	NULL
bb	2	1	0
ff	2	2	1
cc	3	NULL	NULL
bb	NULL	NULL	NULL
aa	1	1	1
dd	1	NULL	0
select oref, a, b from t2 where (a,b) in (select ie1,ie2 from t1 where oref=t2.oref);
oref	a	b
aa	1	1
ff	2	2
select oref, a, b from t2 where (a,b) not in (select ie1,ie2 from t1 where oref=t2.oref);
oref	a	b
bb	2	1
dd	1	NULL
explain extended 
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
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	
2	DEPENDENT SUBQUERY	t1	index_subquery	idx	idx	5	func	4	100.00	Using where; Full scan on NULL key
Warnings:
Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on idx checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`ie1` or `test`.`t1`.`ie1` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`ie2` or `test`.`t1`.`ie2` is null)) having trigcond(`test`.`t1`.`ie1` is null) and trigcond(`test`.`t1`.`ie2` is null))))) AS `Z` from `test`.`t2`
drop table t1,t2;
create table t1 (oref char(4), grp int, ie int primary key);
insert into t1 (oref, grp, ie) values
('aa', 10, 2),
('aa', 10, 1),
('bb', 10, 3),
('cc', 10, 4),
('cc', 20, 5),
('cc', 10, 6);
create table t2 (oref char(4), a int);
insert into t2 values 
('ee', NULL),
('bb', 2),
('cc', 5),
('cc', 2),
('cc', NULL),
('aa', 1),
('bb', NULL);
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	
2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using where; Full scan on NULL key
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
oref	a	Z
ee	NULL	0
bb	2	0
cc	5	1
cc	2	0
cc	NULL	NULL
aa	1	1
bb	NULL	NULL
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
oref	a
aa	1
cc	5
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
oref	a
ee	NULL
bb	2
cc	2
explain 
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	6	Using where; Using temporary
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
oref	a	Z
ee	NULL	0
bb	2	0
cc	5	1
cc	2	0
cc	NULL	NULL
aa	1	1
bb	NULL	NULL
drop table t1,t2;
create table t1 (a int, b int);
insert into t1 values (0,0), (2,2), (3,3);
create table t2 (a int, b int);
insert into t2 values (1,1), (3,3);
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
a	b	Z
0	0	0
2	2	0
3	3	1
insert into t2 values (NULL,4);
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
a	b	Z
0	0	0
2	2	0
3	3	1
drop table t1,t2;
CREATE TABLE t1 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
INSERT INTO t1 VALUES (1,1,'a'), (1,2,'b'), (1,3,'c'), (1,4,'d'), (1,5,'e'),
(2,1,'f'), (2,2,'g'), (2,3,'h'), (3,4,'i'),(3,3,'j'), (3,2,'k'), (3,1,'l'),
(1,9,'m');
CREATE TABLE t2 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
INSERT INTO t2 SELECT * FROM t1;
SELECT a, MAX(b), (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b))
as test FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
SELECT * FROM t1 GROUP by t1.a
HAVING (MAX(t1.b) > (SELECT MAX(t2.b) FROM t2 WHERE t2.c < t1.c
HAVING MAX(t2.b+t1.a) < 10));
a	b	c
SELECT a,b,c FROM t1 WHERE b in (9,3,4) ORDER BY b,c;
a	b	c
1	3	c
2	3	h
3	3	j
1	4	d
3	4	i
1	9	m
SELECT a, MAX(b),
(SELECT COUNT(DISTINCT t.c) FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) 
LIMIT 1) 
as cnt, 
(SELECT t.b FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) 
as t_b,
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) 
as t_b,
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) ORDER BY t.c LIMIT 1)
as t_b
FROM t1 GROUP BY a;
a	MAX(b)	cnt	t_b	t_b	t_b
1	9	1	9	m	m
2	3	1	3	h	h
3	4	1	4	i	i
SELECT a, MAX(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) as test 
FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
DROP TABLE t1, t2;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int, PRIMARY KEY(b));
INSERT INTO t1 VALUES (1), (NULL), (4);
INSERT INTO t2 VALUES (3), (1),(2), (5), (4), (7), (6);
EXPLAIN EXTENDED 
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
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	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	100.00	Using index
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`b` = `test`.`t1`.`a` and !<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` where trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null))))
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
a
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1 WHERE a > 4));
a
1
4
DROP TABLE t1,t2;
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int PRIMARY KEY);
CREATE TABLE t3 (id int PRIMARY KEY, name varchar(10));
INSERT INTO t1 VALUES (2), (NULL), (3), (1);
INSERT INTO t2 VALUES (234), (345), (457);
INSERT INTO t3 VALUES (222,'bbb'), (333,'ccc'), (111,'aaa');
EXPLAIN
SELECT * FROM t1
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3 
WHERE t3.name='xxx' AND t2.id=t3.id);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
2	DEPENDENT SUBQUERY	t2	eq_ref	PRIMARY	PRIMARY	4	func	1	Using where; Using index; Full scan on NULL key
2	DEPENDENT SUBQUERY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t2.id	1	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
SELECT * FROM t1
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3 
WHERE t3.name='xxx' AND t2.id=t3.id);
id
2
NULL
3
1
SELECT (t1.id IN (SELECT t2.id FROM t2,t3 
WHERE t3.name='xxx' AND t2.id=t3.id)) AS x
FROM t1;
x
0
0
0
0
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a INT NOT NULL);
INSERT INTO t1 VALUES (1),(-1), (65),(66);
CREATE TABLE t2 (a INT UNSIGNED NOT NULL PRIMARY KEY);
INSERT INTO t2 VALUES (65),(66);
SELECT a FROM t1 WHERE a NOT IN (65,66);
a
1
-1
SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
a
1
-1
EXPLAIN SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
2	DEPENDENT SUBQUERY	t2	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index; Using where
DROP TABLE t1, t2;
set @@optimizer_switch=@save_optimizer_switch;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES(1);
CREATE TABLE t2 (placeholder CHAR(11));
INSERT INTO t2 VALUES("placeholder");
SELECT ROW(1, 2) IN (SELECT t1.a, 2)         FROM t1 GROUP BY t1.a;
ROW(1, 2) IN (SELECT t1.a, 2)
1
SELECT ROW(1, 2) IN (SELECT t1.a, 2 FROM t2) FROM t1 GROUP BY t1.a;
ROW(1, 2) IN (SELECT t1.a, 2 FROM t2)
1
DROP TABLE t1, t2;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);
CREATE TABLE t2 SELECT * FROM t1;
SELECT 1 FROM t1 WHERE t1.a NOT IN (SELECT 1 FROM t1, t2 WHERE 0);
1
1
1
1
DROP TABLE t1, t2;
create table t1 (a int, b decimal(13, 3));
insert into t1 values (1, 0.123);
select a, (select max(b) from t1) into outfile "subselect.out.file.1" from t1;
delete from t1;
load data infile "subselect.out.file.1" into table t1;
select * from t1;
a	b
1	0.123
drop table t1;
CREATE TABLE t1 (
pk INT PRIMARY KEY,
int_key INT,
varchar_key VARCHAR(5) UNIQUE,
varchar_nokey VARCHAR(5)
);
INSERT INTO t1 VALUES (9, 7,NULL,NULL), (10,8,'p' ,'p');
SELECT varchar_nokey
FROM t1
WHERE NULL NOT IN (
SELECT INNR.pk FROM t1 AS INNR2
LEFT JOIN t1 AS INNR ON ( INNR2.int_key = INNR.int_key )
WHERE INNR.varchar_key > 'n{'
);
varchar_nokey
DROP TABLE t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1), (2), (11);
# 2nd and 3rd columns should be same
SELECT a, ROW(11, 12) = (SELECT a, 22), ROW(11, 12) IN (SELECT a, 22) FROM t1 GROUP BY t1.a;
a	ROW(11, 12) = (SELECT a, 22)	ROW(11, 12) IN (SELECT a, 22)
1	0	0
2	0	0
11	0	0
SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1 GROUP BY t1.a;
a	ROW(11, 12) = (SELECT a, 12)	ROW(11, 12) IN (SELECT a, 12)
1	0	0
2	0	0
11	1	1
SELECT a, ROW(11, 12) = (SELECT a, 22), ROW(11, 12) IN (SELECT a, 22) FROM t1;
a	ROW(11, 12) = (SELECT a, 22)	ROW(11, 12) IN (SELECT a, 22)
1	0	0
2	0	0
11	0	0
SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1;
a	ROW(11, 12) = (SELECT a, 12)	ROW(11, 12) IN (SELECT a, 12)
1	0	0
2	0	0
11	1	1
SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 22), ROW(11, 12) IN (SELECT MAX(x), 22) FROM t1;
x	ROW(11, 12) = (SELECT MAX(x), 22)	ROW(11, 12) IN (SELECT MAX(x), 22)
1	0	0
2	0	0
11	0	0
# 2nd and 3rd columns should be same
EXPLAIN SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
3	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1;
x	ROW(11, 12) = (SELECT MAX(x), 12)	ROW(11, 12) IN (SELECT MAX(x), 12)
1	0	0
2	0	0
11	1	1
DROP TABLE t1;
# both columns should be same
SELECT ROW(1,2) = (SELECT NULL, NULL), ROW(1,2) IN (SELECT NULL, NULL);
ROW(1,2) = (SELECT NULL, NULL)	ROW(1,2) IN (SELECT NULL, NULL)
NULL	NULL
SELECT ROW(1,2) = (SELECT   1,  NULL), ROW(1,2) IN (SELECT    1, NULL);
ROW(1,2) = (SELECT   1,  NULL)	ROW(1,2) IN (SELECT    1, NULL)
NULL	NULL
SELECT ROW(1,2) = (SELECT NULL,    2), ROW(1,2) IN (SELECT NULL,    2);
ROW(1,2) = (SELECT NULL,    2)	ROW(1,2) IN (SELECT NULL,    2)
NULL	NULL
SELECT ROW(1,2) = (SELECT NULL,    1), ROW(1,2) IN (SELECT NULL,    1);
ROW(1,2) = (SELECT NULL,    1)	ROW(1,2) IN (SELECT NULL,    1)
0	0
SELECT ROW(1,2) = (SELECT    1,    1), ROW(1,2) IN (SELECT    1,    1);
ROW(1,2) = (SELECT    1,    1)	ROW(1,2) IN (SELECT    1,    1)
0	0
SELECT ROW(1,2) = (SELECT    1,    2), ROW(1,2) IN (SELECT    1,    2);
ROW(1,2) = (SELECT    1,    2)	ROW(1,2) IN (SELECT    1,    2)
1	1
CREATE TABLE t1 (a INT, b INT, c INT);
INSERT INTO t1 VALUES (1,1,1), (1,1,1);
EXPLAIN EXTENDED 
SELECT c FROM 
( SELECT 
(SELECT COUNT(a) FROM 
(SELECT COUNT(b) FROM t1) AS x GROUP BY c
) FROM t1 GROUP BY b
) AS y;
ERROR 42S22: Unknown column 'c' in 'field list'
SHOW WARNINGS;
Level	Code	Message
Note	1276	Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note	1981	Aggregate function 'count()' of SELECT #3 belongs to SELECT #2
Note	1276	Field or reference 'test.t1.c' of SELECT #3 was resolved in SELECT #2
Error	1054	Unknown column 'c' in 'field list'
DROP TABLE t1;
End of 5.0 tests
#  
# BUG#36896: Server crash on SELECT FROM DUAL
# 
create table t1 (a int);
select 1 as res from dual where (1) in (select * from t1);
res
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int(11) default null,
b int(11) default null,
key (a)
);
insert into t1 select A.a+10*(B.a+10*C.a),A.a+10*(B.a+10*C.a) from t0 A, t0 B, t0 C;
create table t2 (a int(11) default null);
insert into t2 values (0),(1);
create table t3 (a int(11) default null);
insert into t3 values (0),(1);
create table t4 (a int(11) default null);
insert into t4 values (0),(1);
create table t5 (a int(11) default null);
insert into t5 values (0),(1),(0),(1);
select * from t2, t3 
where
t2.a < 10 and
t3.a+1 = 2 and
t3.a in (select t1.b from t1
where t1.a+1=t1.a+1 and
t1.a < (select t4.a+10                                  
from t4, t5 limit 2));
ERROR 21000: Subquery returns more than 1 row
drop table t0, t1, t2, t3, t4, t5;
# 
# BUG#48177 - SELECTs with NOT IN subqueries containing NULL 
#             values return too many records
# 
CREATE TABLE t1 (
i1 int DEFAULT NULL,
i2 int DEFAULT NULL
) ;
INSERT INTO t1 VALUES (1,    NULL);
INSERT INTO t1 VALUES (2,    3);
INSERT INTO t1 VALUES (4,    NULL);
INSERT INTO t1 VALUES (4,    0);
INSERT INTO t1 VALUES (NULL, NULL);
CREATE TABLE t2 (
i1 int DEFAULT NULL,
i2 int DEFAULT NULL
) ;
INSERT INTO t2 VALUES (4, NULL);
INSERT INTO t2 VALUES (5, 0);

Data in t1
SELECT i1, i2 FROM t1;
i1	i2
1	NULL
2	3
4	NULL
4	0
NULL	NULL

Data in subquery (should be filtered out)
SELECT i1, i2 FROM t2 ORDER BY i1;
i1	i2
4	NULL
5	0
FLUSH STATUS;
set @save_optimizer_switch2=@@optimizer_switch;
set optimizer_switch='subquery_cache=off';

SELECT i1, i2
FROM t1
WHERE (i1, i2) 
NOT IN (SELECT i1, i2 FROM t2);
i1	i2
1	NULL
2	3

# Check that the subquery only has to be evaluated once 
# for all-NULL values even though there are two (NULL,NULL) records
# Baseline:
SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name	Value
Handler_read_rnd_next	18

INSERT INTO t1 VALUES (NULL, NULL);
FLUSH STATUS;

SELECT i1, i2
FROM t1
WHERE (i1, i2) 
NOT IN (SELECT i1, i2 FROM t2);
i1	i2
1	NULL
2	3

# Handler_read_rnd_next should be one more than baseline 
# (read record from t1, but do not read from t2)
SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name	Value
Handler_read_rnd_next	19
set @@optimizer_switch=@save_optimizer_switch2;
DROP TABLE t1,t2;
End of 5.1 tests
CREATE TABLE t1 (
a int(11) NOT NULL,
b int(11) NOT NULL,
c datetime default NULL,
PRIMARY KEY  (a),
KEY idx_bc (b,c)
);
INSERT INTO t1 VALUES 
(406989,67,'2006-02-23 17:08:46'), (150078,67,'2005-10-26 11:17:45'),
(406993,67,'2006-02-27 11:20:57'), (245655,67,'2005-12-08 15:59:08'),
(406994,67,'2006-02-27 11:26:46'), (256,67,NULL),
(398341,67,'2006-02-20 04:48:44'), (254,67,NULL),(1120,67,NULL),
(406988,67,'2006-02-23 17:07:22'), (255,67,NULL),
(398340,67,'2006-02-20 04:38:53'),(406631,67,'2006-02-23 10:49:42'),
(245653,67,'2005-12-08 15:59:07'),(406992,67,'2006-02-24 16:47:18'),
(245654,67,'2005-12-08 15:59:08'),(406995,67,'2006-02-28 11:55:00'),
(127261,67,'2005-10-13 12:17:58'),(406991,67,'2006-02-24 16:42:32'),
(245652,67,'2005-12-08 15:58:27'),(398545,67,'2006-02-20 04:53:13'),
(154504,67,'2005-10-28 11:53:01'),(9199,67,NULL),(1,67,'2006-02-23 15:01:35'),
(223456,67,NULL),(4101,67,NULL),(1133,67,NULL),
(406990,67,'2006-02-23 18:01:45'),(148815,67,'2005-10-25 15:34:17'),
(148812,67,'2005-10-25 15:30:01'),(245651,67,'2005-12-08 15:58:27'),
(154503,67,'2005-10-28 11:52:38');
create table t11 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 asc;
create table t12 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 desc;
create table t21 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 asc;
create table t22 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 desc;
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch='materialization=off';
update t22 set c = '2005-12-08 15:58:27' where a = 255;
explain select t21.* from t21,t22 where t21.a = t22.a and 
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t11	ALL	NULL	NULL	NULL	NULL	8	Using where; Start temporary; Using temporary; Using filesort
1	PRIMARY	t12	hash_ALL	NULL	#hash#$hj	4	test.t11.a	8	Using where; Using join buffer (flat, BNLH join)
1	PRIMARY	t22	hash_ALL	NULL	#hash#$hj	4	test.t11.a	26	Using where; End temporary; Using join buffer (incremental, BNLH join)
1	PRIMARY	t21	hash_ALL	NULL	#hash#$hj	4	test.t11.a	26	Using where; Using join buffer (incremental, BNLH join)
select t21.* from t21,t22 where t21.a = t22.a and 
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
a	b	c
256	67	NULL
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t11, t12, t21, t22;
create table t1(a int);
insert into t1 values (0),(1);
set @@optimizer_switch='firstmatch=off,materialization=off';
explain 
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	X	ALL	NULL	NULL	NULL	NULL	2	
2	DEPENDENT SUBQUERY	Y	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	Z	hash_ALL	NULL	#hash#$hj	5	test.Y.a	2	Using where; Start temporary; End temporary; Using join buffer (flat, BNLH join)
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
subq
NULL
0
set @@optimizer_switch=@save_optimizer_switch;
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select * from t0;
insert into t1 select a+10 from t0;
set @@optimizer_switch='firstmatch=off,materialization=off';
insert into t0 values(2);
explain select * from t1 where 2 in (select a from t0);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	11	Using where; Start temporary; End temporary
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (flat, BNL join)
select * from t1 where 2 in (select a from t0);
a
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch='materialization=off';
explain select * from t1 where 2 in (select a from t0);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	11	Using where; FirstMatch
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (flat, BNL join)
select * from t1 where 2 in (select a from t0);
a
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch='materialization=off';
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
explain select * from (select a from t0) X where a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	11	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; FirstMatch(<derived2>); Using join buffer (flat, BNL join)
2	DERIVED	t0	ALL	NULL	NULL	NULL	NULL	11	
drop table t0, t1;
set optimizer_switch=@tmp_optimizer_switch;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
insert into t1 select * from t1 where kp1 < 20;
create table t3 (a int);
insert into t3 select A.a + 10*B.a from t0 A, t0 B;
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	range	kp1	kp1	5	NULL	48	Using where; Using index; LooseScan
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	100	Using where; Using join buffer (flat, BNL join)
create table t4 (pk int primary key);
insert into t4 select a from t3;
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
and t4.pk=t1.c);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	100	Using where
1	PRIMARY	t1	ref	kp1	kp1	5	test.t3.a	1	Using where
1	PRIMARY	t4	eq_ref	PRIMARY	PRIMARY	4	test.t1.c	1	Using index; FirstMatch(t3)
drop table t1, t3, t4;
set @@optimizer_switch=@save_optimizer_switch;
create table t1 (a int) as select * from t0 where a < 5;
set @save_max_heap_table_size=@@max_heap_table_size;
set @@optimizer_switch='firstmatch=off,materialization=off';
set @@max_heap_table_size= 16384;
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E where a+1 < 10000 + A.a + B.a +C.a+D.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	10	
1	PRIMARY	B	ALL	NULL	NULL	NULL	NULL	10	Using join buffer (flat, BNL join)
1	PRIMARY	E	ALL	NULL	NULL	NULL	NULL	5	Using where; Start temporary; Using join buffer (incremental, BNL join)
1	PRIMARY	D	hash_ALL	NULL	#hash#$hj	5	test.E.a	10	Using where; Using join buffer (incremental, BNLH join)
1	PRIMARY	C	ALL	NULL	NULL	NULL	NULL	10	Using where; End temporary; Using join buffer (incremental, BNL join)
flush status;
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E where a+1 < 10000 + A.a + B.a +C.a+D.a);
count(*)
5000
show status like 'Created_tmp_disk_tables';
Variable_name	Value
Created_tmp_disk_tables	1
set @save_max_heap_table_size=@@max_heap_table_size;
set @@optimizer_switch=@save_optimizer_switch;
drop table t0, t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 values (1),(2);
create table t3 ( a int , filler char(100), key(a));
insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	2	
1	PRIMARY	t3	ref	a	a	5	test.t2.a	1	Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
select * from t3 where a in (select a from t2);
a	filler
1	filler
2	filler
drop table t0, t2, t3;
set @@optimizer_switch='firstmatch=off,materialization=off';
create table t1 (a date);
insert into t1 values ('2008-01-01'),('2008-01-01'),('2008-02-01'),('2008-02-01');
create table t2 (a int);
insert into t2 values (1),(2);
create table t3 (a char(10));
insert into t3 select * from t1;
insert into t3 values (1),(2);
explain select * from t2 where a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
1	PRIMARY	t1	hash_ALL	NULL	#hash#$hj	4	test.t2.a	4	Using where; Start temporary; End temporary; Using join buffer (flat, BNLH join)
explain select * from t2 where a in (select a from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
1	PRIMARY	t2	hash_ALL	NULL	#hash#$hj	5	test.t2.a	2	Using where; Start temporary; End temporary; Using join buffer (flat, BNLH join)
explain select * from t2 where a in (select a from t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	6	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
explain select * from t1 where a in (select a from t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	6	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
drop table t1, t2, t3;
create table t1 (a decimal);
insert into t1 values (1),(2);
explain select * from t1 where a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
1	PRIMARY	t1	hash_ALL	NULL	#hash#$hj	6	test.t1.a	2	Using where; Start temporary; End temporary; Using join buffer (flat, BNLH join)
drop table t1;
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch='materialization=off';
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 as select * from t1;
create table t3 (a int, b int, filler char(100), key(a));
insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C;
explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using where
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	Using where; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ref	a	a	5	test.t2.a	10	End temporary; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	10	Using where
1	PRIMARY	B	ALL	NULL	NULL	NULL	NULL	10	Using join buffer (flat, BNL join)
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	10	Using where
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	Using where
2	DEPENDENT SUBQUERY	A	ALL	NULL	NULL	NULL	NULL	10	Using where
2	DEPENDENT SUBQUERY	B	ALL	NULL	NULL	NULL	NULL	10	Using join buffer (flat, BNL join)
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	Using where
2	DEPENDENT SUBQUERY	A	ALL	NULL	NULL	NULL	NULL	10	Using where
2	DEPENDENT SUBQUERY	B	ALL	NULL	NULL	NULL	NULL	10	Using join buffer (flat, BNL join)
explain select straight_join * from t2 X, t2 Y 
where X.a in (select straight_join A.a from t1 A, t1 B);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	X	ALL	NULL	NULL	NULL	NULL	10	Using where
1	PRIMARY	Y	ALL	NULL	NULL	NULL	NULL	10	Using join buffer (flat, BNL join)
2	DEPENDENT SUBQUERY	A	ALL	NULL	NULL	NULL	NULL	10	Using where
2	DEPENDENT SUBQUERY	B	ALL	NULL	NULL	NULL	NULL	10	Using join buffer (flat, BNL join)
create table t0 (a int, b int);
insert into t0 values(1,1);
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	Using where; Start temporary
1	PRIMARY	t3	ref	a	a	5	test.t2.a	10	End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
create table t4 as select a as x, a as y from t1;
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	10	Using where; Start temporary
1	PRIMARY	t3	ref	a	a	5	test.t4.x	10	Using where; End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
drop table t0,t1,t2,t3,t4;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, filler char(100), key(a,b));
insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B;
create table t2 as select * from t1;
explain select * from t2 where a in (select b from t1 where a=3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ref	a	a	5	const	8	Using index; LooseScan
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	100	Using where; Using join buffer (flat, BNL join)
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ref	a	a	5	const	8	Using index; LooseScan
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	100	Using where; Using join buffer (flat, BNL join)
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
create table t1 (a int, b int);
insert into t1 select a,a from t0;
create table t2 (a int, b int);
insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B;
set @@optimizer_switch='firstmatch=off,materialization=off';
explain select * from t1 where (a,b) in (select a,b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using where
1	PRIMARY	t2	hash_ALL	NULL	#hash#$hj	10	test.t1.a,test.t1.b	100	Using where; Start temporary; End temporary; Using join buffer (flat, BNLH join)
set @save_optimizer_search_depth=@@optimizer_search_depth;
set @@optimizer_search_depth=63;
Warnings:
Warning	1292	Truncated incorrect optimizer_search_depth value: '63'
explain select * from t1 where (a,b) in (select a,b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using where
1	PRIMARY	t2	hash_ALL	NULL	#hash#$hj	10	test.t1.a,test.t1.b	100	Using where; Start temporary; End temporary; Using join buffer (flat, BNLH join)
set @@optimizer_search_depth=@save_optimizer_search_depth;
set @@optimizer_switch=@save_optimizer_switch;
drop table t0, t1, t2;
set @@optimizer_switch='materialization=off';
create table t0 (a decimal(4,2));
insert into t0 values (10.24), (22.11);
create table t1 as select * from t0;
insert into t1 select * from t0;
explain select * from t0 where a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where; FirstMatch(t0); Using join buffer (flat, BNL join)
select * from t0 where a in (select a from t1);
a
10.24
22.11
drop table t0, t1;
create table t0(a date);
insert into t0 values ('2008-01-01'),('2008-02-02');
create table t1 as select * from t0;
insert into t1 select * from t0;
explain select * from t0 where a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where; FirstMatch(t0); Using join buffer (flat, BNL join)
select * from t0 where a in (select a from t1);
a
2008-01-01
2008-02-02
drop table t0, t1;
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select a as a, a as b, a as c from t0 where a < 3;
create table t2 as select a as a, a as b from t0 where a < 3;
insert into t2 select * from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
1	PRIMARY	X	ALL	NULL	NULL	NULL	NULL	6	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	Y	ALL	NULL	NULL	NULL	NULL	6	Using where; Using join buffer (incremental, BNL join)
1	PRIMARY	Z	ALL	NULL	NULL	NULL	NULL	6	Using where; FirstMatch(t1); Using join buffer (incremental, BNL join)
drop table t0,t1,t2;
set @@optimizer_switch=@save_optimizer_switch;

BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307

CREATE TABLE t1 (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`int_key` int(11) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `int_key` (`int_key`)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,9),(2,3),(3,8),(4,6),(5,9),(6,5),(7,5),(8,9),(9,1),(10,10);
SELECT `pk` FROM t1 AS OUTR WHERE `int_key` = ALL (
SELECT `int_key` FROM t1 AS INNR WHERE INNR . `pk` >= 9
);
pk
DROP TABLE t1;

BUG#40118 Crash when running Batched Key Access and requiring one match for each key

create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, key(a));
insert into t1 select * from t0;
alter table t1 add b int not null, add filler char(200);
insert into t1 select * from t1;
insert into t1 select * from t1;
set @save_join_cache_level=@@join_cache_level;
set join_cache_level=6;
select * from t0 where t0.a in (select t1.a from t1 where t1.b=0);
a
0
1
2
3
4
5
6
7
8
9
set join_cache_level=@save_join_cache_level;
drop table t0, t1;
# 
# BUG#32665 Query with dependent subquery is too slow
#
create table t1 (
idIndividual int primary key
);
insert into t1 values (1),(2);
create table t2 (
idContact int primary key,
contactType int,
idObj int
);
insert into t2 values (1,1,1),(2,2,2),(3,3,3);
create table t3 (
idAddress int primary key,
idContact int,
postalStripped varchar(100)
);
insert into t3 values (1,1, 'foo'), (2,2,'bar');
The following must be converted to a semi-join:
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='materialization=off';
explain extended SELECT a.idIndividual FROM t1 a 
WHERE a.idIndividual IN 
(	SELECT c.idObj FROM t3 cona 
INNER JOIN t2 c ON c.idContact=cona.idContact 
WHERE cona.postalStripped='T2H3B2'
	);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	cona	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Start temporary
1	PRIMARY	c	eq_ref	PRIMARY	PRIMARY	4	test.cona.idContact	1	100.00	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1	PRIMARY	a	eq_ref	PRIMARY	PRIMARY	4	test.c.idObj	1	100.00	Using index; End temporary
Warnings:
Note	1003	select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where `test`.`cona`.`postalStripped` = 'T2H3B2' and `test`.`a`.`idIndividual` = `test`.`c`.`idObj` and `test`.`c`.`idContact` = `test`.`cona`.`idContact`
set @@optimizer_switch=@save_optimizer_switch;
drop table t1,t2,t3;
#
# BUG#47367 Crash in Name_resolution_context::process_error
#
SET SESSION optimizer_switch = 'semijoin=off';
CREATE TABLE t1 (f1 INTEGER);
CREATE TABLE t2 LIKE t1;
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
CALL p1;
f1
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
f1
DROP PROCEDURE p1;
# Restore the original column list of table t2:
ALTER TABLE t2 CHANGE COLUMN my_column f1 INT;
SET SESSION optimizer_switch = 'semijoin=on';
# Recreate procedure so that we eliminate any caching effects
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
CALL p1;
f1
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
ERROR 42S22: Unknown column 'f1' in 'where clause'
DROP PROCEDURE p1;
DROP TABLE t1, t2;
#
# fix of lp:824425 (prohibiting subqueries in row in
# left part of IN/ALL/ANY)
#
CREATE TABLE t1 ( a int) ;
INSERT INTO t1 VALUES (20),(30);
CREATE TABLE t2 (a int) ;
INSERT INTO t2 VALUES (3),(9);
CREATE TABLE t3 ( a int, b int) ;
INSERT INTO t3 VALUES (20,5),(30,6);
set @optimizer_switch_save=@@optimizer_switch;
SET SESSION optimizer_switch='semijoin=OFF,in_to_exists=OFF,materialization=ON,partial_match_rowid_merge=ON,partial_match_table_scan=OFF';
SELECT * FROM t1
WHERE (
( SELECT a FROM t2 WHERE a = 9 )
) NOT IN (
SELECT b
FROM t3
);
a
20
30
explain extended
SELECT * FROM t1
WHERE (
( SELECT a FROM t2 WHERE a = 9 )
) NOT IN (
SELECT b
FROM t3
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where 1
SELECT * FROM t1
WHERE (
( SELECT a FROM t2 WHERE a = 9 ),
( SELECT a FROM t2 WHERE a = 3 )
) NOT IN (
SELECT b , a
FROM t3
);
ERROR 42000: This version of MariaDB doesn't yet support 'SUBQUERY in ROW in left expression of IN/ALL/ANY'
set optimizer_switch=@optimizer_switch_save;
drop table t1,t2,t3;
End of 5.3 tests
#
# BUG#48920: COUNT DISTINCT returns 1 for NULL values when in a subquery 
#            in the select list
#

CREATE TABLE t1 (
i int(11) DEFAULT NULL,
v varchar(1) DEFAULT NULL
);

INSERT INTO t1 VALUES (8,'v');
INSERT INTO t1 VALUES (9,'r');
INSERT INTO t1 VALUES (NULL,'y');

CREATE TABLE t2 (
i int(11) DEFAULT NULL,
v varchar(1) DEFAULT NULL,
KEY i_key (i)
);

INSERT INTO t2 VALUES (NULL,'r');
INSERT INTO t2 VALUES (0,'c');
INSERT INTO t2 VALUES (0,'o');
INSERT INTO t2 VALUES (2,'v');
INSERT INTO t2 VALUES (7,'c');

SELECT i, v, (SELECT COUNT(DISTINCT i)
FROM t1
WHERE v  = t2.v) as subsel
FROM t2;
i	v	subsel
NULL	r	1
0	c	0
0	o	0
2	v	1
7	c	0

EXPLAIN EXTENDED
SELECT i, v, (SELECT COUNT(DISTINCT i)
FROM t1
WHERE v  = t2.v) as subsel
FROM t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t2.v' of SELECT #2 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t2`.`i` AS `i`,`test`.`t2`.`v` AS `v`,<expr_cache><`test`.`t2`.`v`>((/* select#2 */ select count(distinct `test`.`t1`.`i`) from `test`.`t1` where `test`.`t1`.`v` = `test`.`t2`.`v`)) AS `subsel` from `test`.`t2`
DROP TABLE t1,t2;
End of 5.6 tests
set @@optimizer_switch=@subselect3_tmp;
set join_cache_level=default;
show variables like 'join_cache_level';
Variable_name	Value
join_cache_level	2
set @@optimizer_switch=@save_optimizer_switch;
set @join_cache_level_for_subselect3_test=NULL;