config root man

set optimizer_switch='batched_key_access=on,block_nested_loop=off,mrr_cost_based=off';
set optimizer_switch='semijoin=on,materialization=on,firstmatch=on,loosescan=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=off';
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9),
(10),(12),(14),(16),(18);
create table t1 (
a int, 
b int
) engine=innodb;
insert into t1 values (1,1),(1,1),(2,2);
create table t2 (
a int,
b int,
key(b)
) engine=innodb;
insert into t2 select a, a/2 from t0;
select * from t1;
a	b
1	1
1	1
2	2
select * from t2;
a	b
0	0
1	1
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	5
10	5
12	6
14	7
16	8
18	9
explain select * from t2 where b in (select a from t1);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	<subquery2>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	100.00	Using where
1	SIMPLE	t2	NULL	ref	b	b	5	<subquery2>.a	1	100.00	Using join buffer (Batched Key Access)
2	MATERIALIZED	t1	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t2`.`b` = `<subquery2>`.`a`)
select * from t2 where b in (select a from t1);
a	b
1	1
2	1
3	2
4	2
truncate table t0;
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t3 (
a int, 
b int,
key(b),
pk1 char(200), pk2 char(200), pk3 char(200),
primary key(pk1, pk2, pk3)
) engine=innodb;
insert into t3 select a,a, a,a,a from t0;
explain select * from t3 where b in (select a from t1);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	<subquery2>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	100.00	Using where
1	SIMPLE	t3	NULL	ref	b	b	5	<subquery2>.a	1	100.00	Using join buffer (Batched Key Access)
2	MATERIALIZED	t1	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`pk1` AS `pk1`,`test`.`t3`.`pk2` AS `pk2`,`test`.`t3`.`pk3` AS `pk3` from `test`.`t3` semi join (`test`.`t1`) where (`test`.`t3`.`b` = `<subquery2>`.`a`)
select * from t3 where b in (select a from t1);
a	b	pk1	pk2	pk3
1	1	1	1	1
2	2	2	2	2
set @save_max_heap_table_size= @@max_heap_table_size;
set max_heap_table_size=16384;
set @save_join_buffer_size = @@join_buffer_size;
set join_buffer_size= 8192;
drop table t3;
create table t3 (
a int, 
b int,
key(b),
pk1 char(200), pk2 char(200),
primary key(pk1, pk2)
) engine=innodb;
insert into t3 select 
A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a 
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	<subquery2>	NULL	ALL	NULL	NULL	NULL	NULL	#	100.00	Using where
1	SIMPLE	t3	NULL	ref	b	b	5	<subquery2>.a	#	100.00	Using join buffer (Batched Key Access)
2	MATERIALIZED	t0	NULL	ALL	NULL	NULL	NULL	NULL	#	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`pk1` AS `pk1`,`test`.`t3`.`pk2` AS `pk2` from `test`.`t3` semi join (`test`.`t0`) where (`test`.`t3`.`b` = `<subquery2>`.`a`)
select * from t3 where b in (select a.a+b.a from t0 a, t0 b where b.a<5);
a	b	pk1	pk2
0	0	0	0
1	1	1	1
10	10	10	10
11	11	11	11
12	12	12	12
13	13	13	13
2	2	2	2
3	3	3	3
4	4	4	4
5	5	5	5
6	6	6	6
7	7	7	7
8	8	8	8
9	9	9	9
set join_buffer_size= @save_join_buffer_size;
set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	SIMPLE	t2	NULL	ref	b	b	5	test.t1.a	1	100.00	Using index; FirstMatch(t1)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join (`test`.`t2`) where (`test`.`t2`.`b` = `test`.`t1`.`a`)
select * from t1;
a	b
1	1
1	1
2	2
select * from t1 where a in (select b from t2);
a	b
1	1
1	1
2	2
drop table t0, t1, t2, t3;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a char(200), b char(200), c char(200), primary key (a,b,c)) engine=innodb;
insert into t2 select concat(a, repeat('X',198)),repeat('B',200),repeat('B',200) from t1;
insert into t2 select concat(a, repeat('Y',198)),repeat('B',200),repeat('B',200) from t1;
alter table t2 add filler1 int;
insert into t1 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
set @save_join_buffer_size=@@join_buffer_size;
set join_buffer_size=1;
select * from t2 where filler1 in ( select a from t1);
a	b	c	filler1
set join_buffer_size=default;
drop table t1, t2;

BUG#42740: crash in optimize_semijoin_nests

create table t1 (c6 timestamp,key (c6)) engine=innodb;
create table t2 (c2 double) engine=innodb;
explain select 1 from t2 where c2 = any (select log10(null) from t1 where c6 <null)  ;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`c6` < NULL) and multiple equal(log10(NULL), `test`.`t2`.`c2`))
drop table t1, t2;
# 
# BUG#42742: crash in setup_sj_materialization, Copy_field::set
# 
create table t3 ( c1 year) engine=innodb;
insert into t3 values (2135),(2142);
create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb;
# The following must not crash, EXPLAIN should show one SJ strategy, not a mix:
explain select 1 from t2 where 
c2 in (select 1 from t3, t2) and
c1 in (select convert(c6,char(1)) from t2);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where
1	SIMPLE	t3	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	FirstMatch(t2)
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t2` semi join (`test`.`t3` join `test`.`t2`) semi join (`test`.`t2`) where ((`test`.`t2`.`c2` = 1) and (`test`.`t2`.`c1` = cast(`test`.`t2`.`c6` as char(1) charset latin1)))
drop table t2, t3;
# 
# BUG#57431: subquery returns wrong result (semijoin=on) with pred AND
# 
CREATE TABLE t1 (
i INT
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (2),(4);
CREATE TABLE t2 (
i INT,
vc VARCHAR(1)
) ENGINE=InnoDB;
INSERT INTO t2 VALUES (8,NULL);
SELECT i
FROM t1
WHERE i IN (SELECT innr.i
FROM t2 LEFT JOIN t2 innr ON innr.vc)
AND i = 2;
i
DROP TABLE t1, t2;
set optimizer_switch=default;
set optimizer_switch=default;