EVOLUTION-MANAGER

Edit File: subselect_sj_jcl6.result

set @save_optimizer_switch_jcl6=@@optimizer_switch;
set @@optimizer_switch='optimize_join_buffer_size=on';
set @@optimizer_switch='semijoin=on,firstmatch=on,loosescan=on';
set @@optimizer_switch='semijoin_with_cache=on';
set @@optimizer_switch='outer_join_with_cache=on';
set @@optimizer_switch='join_cache_hashed=off';
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 @optimizer_switch_for_subselect_sj_test=@@optimizer_switch;
set @join_cache_level_for_subselect_sj_test=@@join_cache_level;
drop table if exists t0, t1, t2, t3, t4, t5, t10, t11, t12;
drop view if exists v1, v2, v3, v4;
drop procedure if exists p1;
set @subselect_sj_tmp= @@optimizer_switch;
set optimizer_switch='semijoin=on,firstmatch=on,loosescan=on';
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
SET optimizer_switch=ifnull(@optimizer_switch_for_subselect_sj_test,'outer_join_with_cache=off');
SET optimizer_switch=ifnull(@optimizer_switch_for_subselect_sj_test,'semijoin_with_cache=off');
set join_cache_level=@join_cache_level_for_subselect_sj_test;
set @save_optimizer_switch=@@optimizer_switch;
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);
insert into t1 values (0,0),(1,1),(2,2);
create table t2 as select * from t1;
create table t11(a int, b int);
create table t10 (pk int, a int, primary key(pk));
insert into t10 select a,a from t0;
create table t12 like t10;
insert into t12 select * from t10;
Flattened because of dependency, t10=func(t1)
explain select * from t1 where a in (select pk from t10);
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	t10	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	Using index
select * from t1 where a in (select pk from t10);
a	b
0	0
1	1
2	2
A confluent case of dependency
explain select * from t1 where a in (select a from t10 where pk=12);
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 * from t1 where a in (select a from t10 where pk=12);
a	b
explain select * from t1 where a in (select a from t10 where pk=9);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t10	const	PRIMARY	PRIMARY	4	const	1	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
select * from t1 where a in (select a from t10 where pk=9);
a	b
An empty table inside
explain select * from t1 where a in (select a from t11);
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 * from t1 where a in (select a from t11);
a	b
explain select * from t1 where a in (select pk from t10) and b in (select pk from t10);
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	t10	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	Using index
1	PRIMARY	t10	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	Using index
select * from t1 where a in (select pk from t10) and b in (select pk from t10);
a	b
0	0
1	1
2	2
flattening a nested subquery
explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
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	t10	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1	PRIMARY	t12	eq_ref	PRIMARY	PRIMARY	4	test.t10.a	1	Using index
select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
a	b
0	0
1	1
2	2
flattening subquery w/ several tables
explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a);
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	t10	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	100.00	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1	PRIMARY	t12	eq_ref	PRIMARY	PRIMARY	4	test.t10.a	1	100.00	Using index
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where `test`.`t12`.`pk` = `test`.`t10`.`a` and `test`.`t10`.`pk` = `test`.`t1`.`a`
subqueries within outer joins go into ON expr.
explAin extended
select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10));
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	A	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join Buffer (flAt, BNL join)
1	PRIMARY	B	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join Buffer (incrementAl, BNL join)
2	MATERIALIZED	t10	index	PRIMARY	PRIMARY	4	NULL	10	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on(`test`.`A`.`A` = `test`.`t1`.`A` And <in_optimizer>(`test`.`B`.`A`,`test`.`B`.`A` in ( <mAteriAlize> (/* select#2 */ select `test`.`t10`.`pk` from `test`.`t10` ), <primAry_index_lookup>(`test`.`B`.`A` in <temporAry tABle> on distinct_key where `test`.`B`.`A` = `<suBquery2>`.`pk`)))) where 1
t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)"
explAin extended
select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10));
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	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join Buffer (flAt, BNL join)
2	MATERIALIZED	t10	index	PRIMARY	PRIMARY	4	NULL	10	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`A` = `test`.`t1`.`A` And <in_optimizer>(`test`.`t1`.`A`,`test`.`t1`.`A` in ( <mAteriAlize> (/* select#2 */ select `test`.`t10`.`pk` from `test`.`t10` ), <primAry_index_lookup>(`test`.`t1`.`A` in <temporAry tABle> on distinct_key where `test`.`t1`.`A` = `<suBquery2>`.`pk`)))) where 1
set join_buffer_size=8*1024;
we shouldn't flatten if we're going to get a join of > MAX_TABLES.
explain select * from 
t1 s00, t1 s01,  t1 s02, t1 s03, t1 s04,t1 s05,t1 s06,t1 s07,t1 s08,t1 s09,
t1 s10, t1 s11,  t1 s12, t1 s13, t1 s14,t1 s15,t1 s16,t1 s17,t1 s18,t1 s19,
t1 s20, t1 s21,  t1 s22, t1 s23, t1 s24,t1 s25,t1 s26,t1 s27,t1 s28,t1 s29,
t1 s30, t1 s31,  t1 s32, t1 s33, t1 s34,t1 s35,t1 s36,t1 s37,t1 s38,t1 s39,
t1 s40, t1 s41,  t1 s42, t1 s43, t1 s44,t1 s45,t1 s46,t1 s47,t1 s48,t1 s49
where
s00.a in (
select m00.a from
t1 m00, t1 m01,  t1 m02, t1 m03, t1 m04,t1 m05,t1 m06,t1 m07,t1 m08,t1 m09,
t1 m10, t1 m11,  t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	s00	ALL	NULL	NULL	NULL	NULL	3	Using where
1	PRIMARY	s01	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (flat, BNL join)
1	PRIMARY	s02	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s03	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s04	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s05	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s06	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s07	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s08	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s09	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s10	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s11	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s12	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s13	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s14	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s15	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s16	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s17	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s18	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s19	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s20	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s21	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s22	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s23	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s24	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s25	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s26	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s27	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s28	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s29	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s30	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s31	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s32	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s33	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s34	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s35	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s36	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s37	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s38	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s39	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s40	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s41	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s42	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s43	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s44	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s45	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s46	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s47	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s48	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
1	PRIMARY	s49	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m00	ALL	NULL	NULL	NULL	NULL	3	Using where
2	DEPENDENT SUBQUERY	m01	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (flat, BNL join)
2	DEPENDENT SUBQUERY	m02	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m03	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m04	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m05	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m06	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m07	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m08	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m09	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m10	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m11	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m12	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m13	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m14	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m15	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m16	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m17	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m18	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	m19	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (incremental, BNL join)
select * from
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) 
where t1.a < 5;
a	b	a	b
0	0	0	0
1	1	1	1
2	2	2	2
set join_buffer_size=default;
prepare s1 from
' select * from
    t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
  where t1.a < 5';
execute s1;
a	b	a	b
0	0	0	0
1	1	1	1
2	2	2	2
execute s1;
a	b	a	b
0	0	0	0
1	1	1	1
2	2	2	2
insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B;
explain extended select * from t1 where a in (select pk from t10 where pk<3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t10	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where; Using index
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	103	100.00	Using where; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where `test`.`t1`.`a` = `test`.`t10`.`pk` and `test`.`t10`.`pk` < 3
drop table t0, t1, t2;
drop table t10, t11, t12;

Bug#37899: Wrongly checked optimization prerequisite caused failed
assertion.

CREATE TABLE t1 (
`pk` int(11),
`varchar_nokey` varchar(5)
);
INSERT INTO t1 VALUES
(1,'qk'),(2,'j'),(3,'aew');
SELECT *
FROM t1
WHERE varchar_nokey IN (
SELECT
varchar_nokey
FROM
t1
) XOR pk = 30;
pk	varchar_nokey
1	qk
2	j
3	aew
drop table t1;
#
# BUG#41842: Semi-join materialization strategy crashes when the upper query has HAVING
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
time_key time NOT NULL,
datetime_key datetime NOT NULL,
datetime_nokey datetime NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY time_key (time_key),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t1 VALUES 
(1,0, '00:16:10','2008-09-03 14:25:40','2008-09-03 14:25:40','h','h'),
(2,7, '00:00:00','2001-01-13 00:00:00','2001-01-13 00:00:00','',''),
(3,0, '00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'),
(4,2, '16:29:24','2000-10-16 01:39:08','2000-10-16 01:39:08','w','w'),
(5,1, '09:23:32','0000-00-00 00:00:00','0000-00-00 00:00:00','p','p'),
(6,3, '00:00:00','2007-12-02 00:00:00','2007-12-02 00:00:00','o','o'),
(7,3, '00:00:00','2008-09-11 00:00:00','2008-09-11 00:00:00','',''),
(8,0, '13:59:04','0000-00-00 00:00:00','0000-00-00 00:00:00','s','s'),
(9,7, '09:01:06','0000-00-00 00:00:00','0000-00-00 00:00:00','d','d'),
(10,5,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','n','n'),
(11,0,'21:06:46','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'),
(12,2,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','',''),
(13,6,'14:45:34','2003-07-28 02:34:08','2003-07-28 02:34:08','w','w'),
(14,1,'15:04:12','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'),
(15,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'),
(16,0,'15:55:23','2004-03-17 00:32:27','2004-03-17 00:32:27','p','p'),
(17,1,'16:30:00','2004-12-27 19:20:00','2004-12-27 19:20:00','d','d'),
(18,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','h','h'),
(19,0,'14:13:26','2008-11-09 05:53:48','2008-11-09 05:53:48','o','o'),
(20,0,'00:00:00','2009-10-11 06:58:04','2009-10-11 06:58:04','k','k');
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
time_key time NOT NULL,
datetime_key datetime NOT NULL,
datetime_nokey datetime NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY time_key (time_key),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES 
(10,0,'19:39:13','0000-00-00 00:00:00','0000-00-00 00:00:00','g','g'),
(11,8,'03:43:53','0000-00-00 00:00:00','0000-00-00 00:00:00','b','b');
SELECT OUTR.datetime_nokey AS X FROM t1 AS OUTR 
WHERE 
OUTR.varchar_nokey IN (SELECT 
INNR . varchar_nokey AS Y 
FROM t2 AS INNR 
WHERE
INNR . datetime_key >= INNR . time_key OR 
INNR . pk = INNR . int_nokey  
) 
AND OUTR . varchar_nokey <= 'w' 
HAVING X > '2012-12-12';
X
drop table t1, t2;
#
# Bug#45191: Incorrectly initialized semi-join led to a wrong result.
#
CREATE TABLE STAFF (EMPNUM   CHAR(3) NOT NULL,
EMPNAME  CHAR(20), GRADE DECIMAL(4), CITY CHAR(15));
CREATE TABLE PROJ (PNUM CHAR(3) NOT NULL,
PNAME    CHAR(20), PTYPE CHAR(6),
BUDGET   DECIMAL(9),
CITY     CHAR(15));
CREATE TABLE WORKS (EMPNUM CHAR(3) NOT NULL,
PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5));
INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale');
INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna');
INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna');
INSERT INTO STAFF VALUES ('E4','Don',12,'Deale');
INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron');
INSERT INTO PROJ VALUES  ('P1','MXSS','Design',10000,'Deale');
INSERT INTO PROJ VALUES  ('P2','CALM','Code',30000,'Vienna');
INSERT INTO PROJ VALUES  ('P3','SDP','Test',30000,'Tampa');
INSERT INTO PROJ VALUES  ('P4','SDP','Design',20000,'Deale');
INSERT INTO PROJ VALUES  ('P5','IRM','Test',10000,'Vienna');
INSERT INTO PROJ VALUES  ('P6','PAYR','Design',50000,'Deale');
INSERT INTO WORKS VALUES  ('E1','P1',40);
INSERT INTO WORKS VALUES  ('E1','P2',20);
INSERT INTO WORKS VALUES  ('E1','P3',80);
INSERT INTO WORKS VALUES  ('E1','P4',20);
INSERT INTO WORKS VALUES  ('E1','P5',12);
INSERT INTO WORKS VALUES  ('E1','P6',12);
INSERT INTO WORKS VALUES  ('E2','P1',40);
INSERT INTO WORKS VALUES  ('E2','P2',80);
INSERT INTO WORKS VALUES  ('E3','P2',20);
INSERT INTO WORKS VALUES  ('E4','P2',20);
INSERT INTO WORKS VALUES  ('E4','P4',40);
INSERT INTO WORKS VALUES  ('E4','P5',80);
set optimizer_switch=@save_optimizer_switch;
set optimizer_switch='materialization=off';
explain SELECT EMPNUM, EMPNAME
FROM STAFF
WHERE EMPNUM IN
(SELECT EMPNUM  FROM WORKS
WHERE PNUM IN
(SELECT PNUM  FROM PROJ));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	STAFF	ALL	NULL	NULL	NULL	NULL	5	
1	PRIMARY	PROJ	ALL	NULL	NULL	NULL	NULL	6	Using join buffer (flat, BNL join)
1	PRIMARY	WORKS	ALL	NULL	NULL	NULL	NULL	12	Using where; FirstMatch(STAFF); Using join buffer (incremental, BNL join)
SELECT EMPNUM, EMPNAME
FROM STAFF
WHERE EMPNUM IN
(SELECT EMPNUM  FROM WORKS
WHERE PNUM IN
(SELECT PNUM  FROM PROJ));
EMPNUM	EMPNAME
E1	Alice
E2	Betty
E3	Carmen
E4	Don
set optimizer_switch=@save_optimizer_switch;
drop table STAFF,WORKS,PROJ;
# End of bug#45191
#
# Bug#46550 Azalea returning duplicate results for some IN subqueries
# w/ semijoin=on
#
DROP TABLE IF EXISTS t0, t1, t2;
CREATE TABLE t0 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t0 VALUES
(1,'m','m'),
(40,'h','h'),
(1,'r','r'),
(1,'h','h'),
(9,'x','x'),
(NULL,'q','q'),
(NULL,'k','k'),
(7,'l','l'),
(182,'k','k'),
(202,'a','a'),
(7,'x','x'),
(6,'j','j'),
(119,'z','z'),
(4,'d','d'),
(5,'h','h'),
(1,'u','u'),
(3,'q','q'),
(7,'a','a'),
(3,'e','e'),
(6,'l','l');
CREATE TABLE t1 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t1 VALUES (7,NULL,NULL),(4,'x','x');
CREATE TABLE t2 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t2 VALUES (123,NULL,NULL);
SELECT int_key  
FROM t0  
WHERE varchar_nokey  IN (  
SELECT t1 .varchar_key  from t1
);
int_key
9
7
DROP TABLE t0, t1, t2;
# End of bug#46550
#
# Bug #46744 Crash in optimize_semijoin_nests on empty view
# with limit and procedure.
#
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
DROP PROCEDURE IF EXISTS p1;
CREATE TABLE t1 ( f1 int );
CREATE TABLE t2 ( f1 int );
insert into t2 values (5), (7);
CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1 LIMIT 2;
create procedure p1() 
select COUNT(*) 
FROM v1 WHERE f1 IN 
(SELECT f1 FROM t2 WHERE f1 = ANY (SELECT f1 FROM v1));
SET SESSION optimizer_switch = 'semijoin=on';
CALL p1();
COUNT(*)
0
SET SESSION optimizer_switch = 'semijoin=off';
CALL p1();
COUNT(*)
0
drop table t1, t2;
drop view v1;
drop procedure p1;
set SESSION optimizer_switch=@save_optimizer_switch;
# End of bug#46744

Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order 
with semijoin=on"

CREATE TABLE t1 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
CREATE TABLE t2 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES
(NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'),
('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'),
('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'),
('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'),
('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'),
('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'),
('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'),
('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z');
CREATE TABLE t3 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t3 VALUES
(NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'),
('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y');
SELECT varchar_key FROM t3 
WHERE (SELECT varchar_key FROM t3 
WHERE (varchar_key,varchar_key) 
IN (SELECT t1.varchar_key, t2 .varchar_key 
FROM t1 RIGHT JOIN t2 ON t1.varchar_key  
)  
);
varchar_key
DROP TABLE t1, t2, t3;
#
# Bug#46556 Returning incorrect, empty results for some IN subqueries 
#           w/semijoin=on
#
CREATE TABLE t0 (
pk INTEGER,
vkey VARCHAR(1),
vnokey VARCHAR(1),
PRIMARY KEY (pk),
KEY vkey(vkey)
);
INSERT INTO t0 
VALUES (1,'g','g'), (2,'v','v'), (3,'t','t'), (4,'u','u'), (5,'n','n');
EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN 
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t0	ALL	PRIMARY	NULL	NULL	NULL	5	100.00	
1	PRIMARY	t1	eq_ref	PRIMARY	PRIMARY	4	test.t0.pk	1	100.00	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1	PRIMARY	t2	ref	vkey	vkey	4	test.t1.vnokey	2	100.00	Using index; FirstMatch(t1)
Warnings:
Note	1003	select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where `test`.`t1`.`pk` = `test`.`t0`.`pk` and `test`.`t2`.`vkey` = `test`.`t1`.`vnokey`
SELECT vkey FROM t0 WHERE pk IN 
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
vkey
g
v
t
u
n
DROP TABLE t0;
# End of bug#46556

Bug #48073 Subquery on char columns from view crashes Mysql

Bug#48834: Procedure with view + subquery + semijoin=on 
crashes on second call.

SET SESSION optimizer_switch ='semijoin=on';
CREATE TABLE t1 ( t1field integer, primary key (t1field));
CREATE TABLE t2 ( t2field integer, primary key (t2field));
CREATE VIEW v1 AS 
SELECT t1field as v1field
FROM t1 A 
WHERE A.t1field IN (SELECT t1field FROM t2 );
CREATE VIEW v2 AS 
SELECT t2field as v2field
FROM t2 A 
WHERE A.t2field IN (SELECT t2field FROM t2 );
CREATE PROCEDURE p1 () 
BEGIN 
SELECT v1field
FROM v1 
WHERE v1field IN ( SELECT v2field as vf_inner FROM v2 );
END|
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (2),(3),(4);
CALL p1;
v1field
2
3
CALL p1;
v1field
2
3
DROP TABLE t1,t2;
DROP VIEW v1,v2;
DROP PROCEDURE p1;
set SESSION optimizer_switch=@save_optimizer_switch;
# End of BUG#48834

Bug#49097 subquery with view generates wrong result with
non-prepared statement

DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
CREATE TABLE t1 (
city VARCHAR(50) NOT NULL,
country_id SMALLINT UNSIGNED NOT NULL
);
INSERT INTO t1 VALUES 
('Batna',2),
('Bchar',2),
('Skikda',2),
('Tafuna',3),
('Algeria',2) ;
CREATE TABLE t2 (
country_id SMALLINT UNSIGNED NOT NULL,
country VARCHAR(50) NOT NULL
);
INSERT INTO t2 VALUES
(2,'Algeria'),
(3,'XAmerican Samoa') ;
CREATE VIEW v1 AS 
SELECT country_id, country 
FROM t2
WHERE LEFT(country,1) = "A" 
;
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id 
FROM t2
WHERE LEFT(country,1) = "A" 
);
city	country_id
Batna	2
Bchar	2
Skikda	2
Algeria	2
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id 
FROM v1
);
city	country_id
Batna	2
Bchar	2
Skikda	2
Algeria	2
PREPARE stmt FROM
"
SELECT city, country_id
FROM t1
WHERE country_id IN (
  SELECT country_id 
  FROM v1
);
";
execute stmt;
city	country_id
Batna	2
Bchar	2
Skikda	2
Algeria	2
deallocate prepare stmt;
drop table t1, t2;
drop view v1;
# End of Bug#49097
# 
# BUG#38075: Wrong result: rows matching a subquery with outer join not returned
# 
DROP TABLE IF EXISTS ot1, it1, it2;
CREATE TABLE it2 (
int_key int(11) NOT NULL,
datetime_key datetime NOT NULL,
KEY int_key (int_key),
KEY datetime_key (datetime_key)
);
INSERT INTO it2 VALUES
(5,'2002-04-10 14:25:30'), (0,'0000-00-00 00:00:00'),
(0,'2006-09-14 04:01:02'), (4,'0000-00-00 00:00:00'),
(8,'0000-00-00 00:00:00'), (5,'0000-00-00 00:00:00'),
(9,'0000-00-00 00:00:00'), (8,'2007-04-01 11:04:17'),
(1,'0000-00-00 00:00:00'), (7,'2009-01-12 00:00:00'),
(0,'2009-06-05 00:00:00'), (3,'2006-02-14 18:06:35'),
(5,'2006-02-21 07:08:16'), (0,'0000-00-00 00:00:00'),
(7,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'),
(0,'2007-02-13 00:00:00'), (1,'0000-00-00 00:00:00'),
(0,'0000-00-00 00:00:00'), (1,'2003-08-11 00:00:00');
CREATE TABLE ot1 (
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
KEY int_key (int_key)
);
INSERT INTO ot1 VALUES
(5,0), (3,0), (0,2), (3,0), (1,3), (0,0), (1,7), (7,0), (1,7), (0,7),
(0,9), (8,2), (4,4), (9,3), (0,9), (2,5), (0,5), (8,0), (5,8), (1,5);
CREATE TABLE it1 (
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
KEY int_key (int_key)
);
INSERT INTO it1 VALUES
(9,5), (0,4);
SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
int_key
0
0
0
0
0
0
2
2
3
5
5
7
7
7
8
9
9
EXPLAIN
SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	11	
1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	it1	index	NULL	int_key	4	NULL	2	Using index
2	MATERIALIZED	it2	ALL	int_key,datetime_key	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
DROP TABLE ot1, it1, it2;
# End of BUG#38075
#
# BUG#31480: Incorrect result for nested subquery when executed via semi join
#
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 (2,10);
insert into t1 values (1,20);
insert into t1 values (2,20);
insert into t1 values (3,20);
insert into t1 values (2,30);
insert into t1 values (4,40);
insert into t2 values (2,10);
insert into t2 values (2,20);
insert into t2 values (4,10);
insert into t2 values (5,10);
insert into t2 values (3,20);
insert into t2 values (2,40);
insert into t3 values (10);
insert into t3 values (30);
insert into t3 values (10);
insert into t3 values (20);
explain extended
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	7	100.00	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where; FirstMatch(t1); Using join buffer (flat, BNL join)
3	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`c` = `test`.`t1`.`a` and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(/* select#3 */ select `test`.`t3`.`e` from `test`.`t3` where `test`.`t1`.`b` = `test`.`t3`.`e` and <cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))
show warnings;
Level	Code	Message
Note	1276	Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`c` = `test`.`t1`.`a` and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(/* select#3 */ 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
3
2
drop table t1, t2, t3;
# 
# Bug#48213 Materialized subselect crashes if using GEOMETRY type
# 
CREATE TABLE t1 (
pk int,
a varchar(1),
b varchar(4),
c tinyblob,
d blob,
e mediumblob,
f longblob,
g tinytext,
h text,
i mediumtext,
j longtext,
k geometry,
PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo','ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')), (2,'f','ffff','ffff','ffff', 'ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))'));
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')), (2,'f','ffff','ffff','ffff','ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))'));
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	11	func,func	1	100.00	
2	MATERIALIZED	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);
pk
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`c` = `test`.`t1`.`c` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`d` = `test`.`t1`.`d` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0);
pk
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`e` = `test`.`t1`.`e` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`f` = `test`.`t1`.`f` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`g` = `test`.`t1`.`g` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`h` = `test`.`t1`.`h` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`i` = `test`.`t1`.`i` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`j` = `test`.`t1`.`j` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0);
pk
1
2
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0);
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	
1	PRIMARY	t2	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t2`.`k` = `test`.`t1`.`k` and `test`.`t2`.`pk` > 0
SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0);
pk
1
2
DROP TABLE t1, t2;
# End of Bug#48213
# 
# Bug#49198 Wrong result for second call of procedure
#           with view in subselect.
# 
CREATE TABLE t1 (t1field integer, primary key (t1field));
CREATE TABLE t2 (t2field integer, primary key (t2field));
CREATE TABLE t3 (t3field integer, primary key (t3field));
CREATE VIEW v2 AS SELECT * FROM t2;
CREATE VIEW v3 AS SELECT * FROM t3;
INSERT INTO t1 VALUES(1),(2);
INSERT INTO t2 VALUES(1),(2);
INSERT INTO t3 VALUES(1),(2);
PREPARE stmt FROM
"
SELECT t1field
FROM t1
WHERE t1field IN (SELECT * FROM v2);
";
EXECUTE stmt;
t1field
1
2
EXECUTE stmt;
t1field
1
2
PREPARE stmt FROM
"
EXPLAIN
SELECT t1field
FROM t1
WHERE t1field IN (SELECT * FROM v2)
  AND t1field IN (SELECT * FROM v3)
";
EXECUTE stmt;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	PRIMARY	PRIMARY	4	NULL	2	Using index
1	PRIMARY	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.t1field	1	Using index
1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t1.t1field	1	Using index
EXECUTE stmt;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	PRIMARY	PRIMARY	4	NULL	2	Using index
1	PRIMARY	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.t1field	1	Using index
1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t1.t1field	1	Using index
DROP TABLE t1, t2, t3;
DROP VIEW v2, v3;
# End of Bug#49198
#
# Bug#45174: Incorrectly applied equality propagation caused wrong
# result on a query with a materialized semi-join.
#
CREATE TABLE `t1` (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`varchar_key` varchar(1) NOT NULL,
`varchar_nokey` varchar(1) NOT NULL,
PRIMARY KEY (`pk`),
KEY `varchar_key` (`varchar_key`)
);
INSERT INTO `t1` VALUES (11,'m','m'),(12,'j','j'),(13,'z','z'),(14,'a','a'),(15,'',''),(16,'e','e'),(17,'t','t'),(19,'b','b'),(20,'w','w'),(21,'m','m'),(23,'',''),(24,'w','w'),(26,'e','e'),(27,'e','e'),(28,'p','p');
CREATE TABLE `t2` (
`varchar_nokey` varchar(1) NOT NULL
);
INSERT INTO `t2` VALUES ('v'),('u'),('n'),('l'),('h'),('u'),('n'),('j'),('k'),('e'),('i'),('u'),('n'),('b'),('x'),(''),('q'),('u');
EXPLAIN EXTENDED SELECT varchar_nokey
FROM t2  
WHERE ( `varchar_nokey`  , `varchar_nokey`  )  IN (  
SELECT `varchar_key`  , `varchar_nokey`  
FROM t1  
WHERE `varchar_nokey`  < 'n' XOR `pk`  )   ;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	15	100.00	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	18	100.00	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t1	ALL	varchar_key	NULL	NULL	NULL	15	100.00	Using where
Warnings:
Note	1003	select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where `test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key` and `test`.`t2`.`varchar_nokey` = `test`.`t1`.`varchar_key` and (`test`.`t1`.`varchar_key` < 'n' xor `test`.`t1`.`pk`)
SELECT varchar_nokey
FROM t2  
WHERE ( `varchar_nokey`  , `varchar_nokey`  )  IN (  
SELECT `varchar_key`  , `varchar_nokey`  
FROM t1  
WHERE `varchar_nokey`  < 'n' XOR `pk`  )   ;
varchar_nokey
DROP TABLE t1, t2;
# End of the test for bug#45174.
#
# BUG#43768: Prepared query with nested subqueries core dumps on second execution
#
create table t1 (
id int(11) unsigned not null primary key auto_increment,
partner_id varchar(35) not null,
t1_status_id int(10) unsigned
);
insert into t1 values ("1", "partner1", "10"), ("2", "partner2", "10"),
("3", "partner3", "10"), ("4", "partner4", "10");
create table t2 (
id int(11) unsigned not null default '0',
t1_line_id int(11) unsigned not null default '0',
article_id varchar(20),
sequence int(11) not null default '0',
primary key  (id,t1_line_id)
);
insert into t2 values ("1", "1", "sup", "0"), ("2", "1", "sup", "1"),
("2", "2", "sup", "2"), ("2", "3", "sup", "3"),
("2", "4", "imp", "4"), ("3", "1", "sup", "0"),
("4", "1", "sup", "0");
create table t3 (
id int(11) not null default '0',
preceding_id int(11) not null default '0',
primary key  (id,preceding_id)
);
create table t4 (
user_id varchar(50) not null,
article_id varchar(20) not null,
primary key  (user_id,article_id)
);
insert into t4 values("nicke", "imp");
prepare stmt from
'select t1.partner_id
from t1
where
  t1.id in (
    select pl_inner.id
    from t2 as pl_inner
    where  pl_inner.article_id in (
      select t4.article_id from t4
      where t4.user_id = \'nicke\'
    )
  )';
execute stmt;
partner_id
partner2
execute stmt;
partner_id
partner2
drop table t1,t2,t3,t4;
# 
# Bug#48623 Multiple subqueries are optimized incorrectly
# 
CREATE TABLE t1(val VARCHAR(10));
CREATE TABLE t2(val VARCHAR(10));
CREATE TABLE t3(val VARCHAR(10));
INSERT INTO t1  VALUES('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp');
INSERT INTO t2 VALUES('aaa'), ('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp');
INSERT INTO t3 VALUES('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp');
EXPLAIN
SELECT *
FROM t1
WHERE t1.val IN (SELECT t2.val FROM t2
WHERE  t2.val LIKE 'a%' OR t2.val LIKE 'e%')
AND t1.val IN (SELECT t3.val FROM t3
WHERE  t3.val LIKE 'a%' OR t3.val LIKE 'e%');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	5	
1	PRIMARY	<subquery3>	eq_ref	distinct_key	distinct_key	13	func	1	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	13	func	1	
3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	5	Using where
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	6	Using where
SELECT *
FROM t1
WHERE t1.val IN (SELECT t2.val FROM t2
WHERE  t2.val LIKE 'a%' OR t2.val LIKE 'e%')
AND t1.val IN (SELECT t3.val FROM t3
WHERE  t3.val LIKE 'a%' OR t3.val LIKE 'e%');
val
aaa
eee
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
# End of Bug#48623
# 
# LPBUG#602574: RQG: sql_select.cc:5385: bool greedy_search(JOIN*, table_map, uint, 
#               uint): Assertion `join->best_read <
#
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='materialization=off';
CREATE TABLE t1 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
CREATE TABLE t2 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES
(NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'),
('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'),
('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'),
('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'),
('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'),
('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'),
('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'),
('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z');
CREATE TABLE t3 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t3 VALUES
(NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'),
('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y');
SELECT varchar_key FROM t3 
WHERE (SELECT varchar_key FROM t3 
WHERE (varchar_key,varchar_key) 
IN (SELECT t1.varchar_key, t2 .varchar_key 
FROM t1 RIGHT JOIN t2 ON t1.varchar_key  
)  
);
varchar_key
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1, t2, t3;
#
# Bug#46692 "Crash occurring on queries with nested FROM subqueries 
# using materialization."
#
CREATE TABLE t1 (
pk INTEGER PRIMARY KEY,
int_key INTEGER,
KEY int_key(int_key)
);
INSERT INTO t1 VALUES (10,186),(11,NULL),(12,2),(13,3),(14,0),(15,133),(16,1);
CREATE TABLE t2 (
pk INTEGER PRIMARY KEY,
int_key INTEGER,
KEY int_key(int_key)
);
INSERT INTO t2 VALUES (1,7),(2,2);
SELECT * FROM t1 WHERE (140, 4) IN 
(SELECT t2.int_key, t2 .pk FROM t2 STRAIGHT_JOIN t1 ON t2.int_key);
pk	int_key
DROP TABLE t1, t2;
#
# Bug#42353 "SELECT ... WHERE oe IN (SELECT w/ LEFT JOIN) query
# causes crash."
#
CREATE TABLE t1 (
pk INTEGER PRIMARY KEY,
int_nokey INTEGER,
int_key INTEGER,
date_key DATE,
datetime_nokey DATETIME,
varchar_nokey VARCHAR(1)
);
CREATE TABLE t2 (
date_nokey DATE
);
CREATE TABLE t3 (
pk INTEGER PRIMARY KEY,
int_nokey INTEGER,
date_key date,
varchar_key VARCHAR(1),
varchar_nokey VARCHAR(1),
KEY date_key (date_key)
);
SELECT date_key FROM t1
WHERE (int_key, int_nokey)
IN (SELECT  t3.int_nokey, t3.pk
FROM t2 LEFT JOIN t3 ON (t2.date_nokey < t3.date_key) 
WHERE t3.varchar_key <= t3.varchar_nokey OR t3.int_nokey <= t3.pk
)
AND (varchar_nokey <> 'f' OR NOT int_key < 7);
date_key
#
# Bug#45933 "Crash in optimize_semijoin_nests on JOIN in subquery 
# + AND in outer query".
#
INSERT INTO t1 VALUES (10,7,5,'2009-06-16','2002-04-10 14:25:30','w'),
(11,7,0,'0000-00-00','0000-00-00 00:00:00','s'), 
(12,4,0,'2003-07-14','2006-09-14 04:01:02','y'), 
(13,0,4,'2002-07-25','0000-00-00 00:00:00','c'), 
(14,1,8,'2007-07-03','0000-00-00 00:00:00','q'), 
(15,6,5,'2001-11-12','0000-00-00 00:00:00',''), 
(16,2,9,'0000-00-00','0000-00-00 00:00:00','j'), 
(29,9,1,'0000-00-00','2003-08-11 00:00:00','m');
INSERT INTO t3 VALUES (1,9,'0000-00-00','b','b'),
(2,2,'2002-09-17','h','h');
SELECT t1.varchar_nokey FROM t1 JOIN t3 ON t1.datetime_nokey
WHERE t1.varchar_nokey 
IN (SELECT varchar_nokey FROM t1 
WHERE (pk) 
IN (SELECT t3.int_nokey
FROM t3 LEFT JOIN t1 ON t1.varchar_nokey
WHERE t3.date_key BETWEEN '2008-06-07' AND '2006-06-26'
           )  
);
varchar_nokey
DROP TABLE t1, t2, t3;
#
# Bug#45219 "Crash on SELECT DISTINCT query containing a  
# LEFT JOIN in subquery"
#
CREATE TABLE t1 (
pk INTEGER NOT NULL,
int_nokey INTEGER NOT NULL,
datetime_key DATETIME NOT NULL,
varchar_key VARCHAR(1) NOT NULL,
PRIMARY KEY (pk),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t1 VALUES
(1,9,'0000-00-00 00:00:00','p'),(2,0,'2002-02-09 07:38:13','v'),
(3,8,'2001-05-03 12:08:14','t'),(4,3,'0000-00-00 00:00:00','u'),
(5,7,'2009-07-28 03:43:30','n'),(6,0,'2009-08-04 00:00:00','l'),
(7,1,'0000-00-00 00:00:00','h'),(8,9,'0000-00-00 00:00:00','u'),
(9,0,'2005-08-02 17:16:54','n'),(10,9,'2002-12-21 00:00:00','j'),
(11,0,'2005-08-15 12:37:35','k'),(12,5,'0000-00-00 00:00:00','e'),
(13,0,'2006-03-10 00:00:00','i'),(14,8,'2005-05-16 11:02:36','u'),
(15,8,'2008-11-02 00:00:00','n'),(16,5,'2006-03-15 00:00:00','b'),
(17,1,'0000-00-00 00:00:00','x'),(18,7,'0000-00-00 00:00:00',''),
(19,0,'2008-12-17 20:15:40','q'),(20,9,'0000-00-00 00:00:00','u');
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES 
(10,0,'2006-07-07 07:26:28','q'),(11,5,'2002-09-23 00:00:00','m'),
(12,7,'0000-00-00 00:00:00','j'),(13,1,'2006-06-07 00:00:00','z'),
(14,8,'2000-09-16 12:15:34','a'),(15,2,'2007-08-05 15:47:52',''),
(16,1,'0000-00-00 00:00:00','e'),(17,8,'2005-12-02 19:34:26','t'),
(18,5,'0000-00-00 00:00:00','q'),(19,4,'0000-00-00 00:00:00','b'),
(20,5,'2007-12-28 00:00:00','w'),(21,3,'2004-08-02 11:48:43','m'),
(22,0,'0000-00-00 00:00:00','x'),(23,8,'2004-04-19 12:18:43',''),
(24,0,'2009-04-27 00:00:00','w'),(25,4,'2006-10-20 14:52:15','x'),
(26,0,'0000-00-00 00:00:00','e'),(27,0,'2002-03-22 11:48:37','e'),
(28,2,'0000-00-00 00:00:00','p'),(29,0,'2001-01-04 03:55:07','x');
CREATE TABLE t3 LIKE t1;
INSERT INTO t3 VALUES
(10,8,'2007-08-19 08:08:38','i'),(11,0,'2000-05-21 03:51:51','');
SELECT DISTINCT datetime_key FROM t1
WHERE (int_nokey, pk)  
IN (SELECT t3.pk, t3.pk FROM t2 LEFT JOIN t3 ON t3.varchar_key)  
AND pk = 9;
datetime_key
DROP TABLE t1, t2, t3;
# 
# BUG#53060: LooseScan semijoin strategy does not return all rows
# 
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='semijoin=on,materialization=off';
set optimizer_switch='firstmatch=off,loosescan=on';
CREATE TABLE t1 (i INTEGER);
INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
CREATE TABLE t2 (i INTEGER, j INTEGER, KEY k(i, j));
INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
EXPLAIN
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	index	k	k	10	NULL	4	Using where; Using index; LooseScan
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
i
1
2
DROP TABLE t1, t2;
set optimizer_switch=@save_optimizer_switch;
#
# BUG#49453: re-execution of prepared statement with view 
#            and semijoin crashes
#
CREATE TABLE t1 (city VARCHAR(50), country_id INT);
CREATE TABLE t2 (country_id INT, country VARCHAR(50));
INSERT INTO t1 VALUES 
('Batna',2),('Bchar',2),('Skikda',2),('Tafuna',3),('Algeria',2) ;
INSERT INTO t2 VALUES (2,'Algeria'),(2,'AlgeriaDup'),(3,'XAmerican Samoa');
CREATE VIEW v1 AS 
SELECT country_id as vf_country_id
FROM t2
WHERE LEFT(country,1) = "A";
PREPARE stmt FROM "
SELECT city, country_id
FROM t1
WHERE country_id IN (SELECT vf_country_id FROM v1);
";

EXECUTE stmt;
city	country_id
Batna	2
Bchar	2
Skikda	2
Algeria	2
EXECUTE stmt;
city	country_id
Batna	2
Bchar	2
Skikda	2
Algeria	2
DROP TABLE t1,t2;
DROP VIEW v1;
#
# Bug#54437 Extra rows with LEFT JOIN + semijoin 
#
create table t1 (a int);
create table t2 (a int);
create table t3 (a int);
insert into t1 values(1),(1);
insert into t2 values(1),(1),(1),(1);
insert into t3 values(2),(2);
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='materialization=off';
set optimizer_switch='semijoin=off';
explain
select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
a
1
1
set optimizer_switch='semijoin=on';
explain
select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary; Using join buffer (incremental, BNL join)
select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
a
1
1
set optimizer_switch=@save_optimizer_switch;
drop table t1,t2,t3;
#
# Bug#55955: crash in MEMORY engine with IN(LEFT JOIN (JOIN))
#
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
CREATE TABLE t3 (a INT);
INSERT INTO t1 VALUES(1),(1);
INSERT INTO t2 VALUES(1),(1);
INSERT INTO t3 VALUES(2),(2);
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='semijoin=off,materialization=off';
EXPLAIN
SELECT * FROM t1
WHERE t1.a IN (SELECT t2.a
FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t2inner	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (incremental, BNL join)
SELECT * FROM t1
WHERE t1.a IN (SELECT t2.a
FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
a
1
1
set optimizer_switch='semijoin=off,materialization=on';
EXPLAIN
SELECT * FROM t1
WHERE t1.a IN (SELECT t2.a
FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	
2	MATERIALIZED	t2inner	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (incremental, BNL join)
SELECT * FROM t1
WHERE t1.a IN (SELECT t2.a
FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
a
1
1
set optimizer_switch='semijoin=on,materialization=off';
EXPLAIN
SELECT * FROM t1
WHERE t1.a IN (SELECT t2.a
FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t2inner	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (incremental, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary; Using join buffer (incremental, BNL join)
SELECT * FROM t1
WHERE t1.a IN (SELECT t2.a
FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
a
1
1
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2,t3;
#
# BUG#52329 - Wrong result: subquery materialization, IN, 
#             non-null field followed by nullable
#
CREATE TABLE t1 (a1 CHAR(8) NOT NULL, a2 char(8) NOT NULL);
CREATE TABLE t2a (b1 char(8), b2 char(8));
CREATE TABLE t2b (b1 CHAR(8), b2 char(8) NOT NULL);
CREATE TABLE t2c (b1 CHAR(8) NOT NULL, b2 char(8));
INSERT INTO t1 VALUES ('1 - 12', '2 - 22');
INSERT INTO t2a VALUES ('1 - 11', '2 - 21'),
('1 - 11', '2 - 21'),
('1 - 12', '2 - 22'),
('1 - 12', '2 - 22'),
('1 - 13', '2 - 23');
INSERT INTO t2b SELECT * FROM t2a;
INSERT INTO t2c SELECT * FROM t2a;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='semijoin=off,materialization=on';
SELECT * FROM t1
WHERE (a1, a2) IN (
SELECT b1, b2 FROM t2c WHERE b1 > '0' GROUP BY b1, b2);
a1	a2
1 - 12	2 - 22
SELECT * FROM t1
WHERE (a1, a2) IN (
SELECT b1, b2 FROM t2a WHERE b1 > '0');
a1	a2
1 - 12	2 - 22
SELECT * FROM t1
WHERE (a1, a2) IN (
SELECT b1, b2 FROM t2b WHERE b1 > '0');
a1	a2
1 - 12	2 - 22
SELECT * FROM t1
WHERE (a1, a2) IN (
SELECT b1, b2 FROM t2c WHERE b1 > '0');
a1	a2
1 - 12	2 - 22
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2a,t2b,t2c;
#
# Bug#57623: subquery within before insert trigger causes crash (sj=on)
#
CREATE TABLE ot1(a INT);
CREATE TABLE ot2(a INT);
CREATE TABLE ot3(a INT);
CREATE TABLE it1(a INT);
INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
INSERT INTO ot2 VALUES(0),(2),(4),(6);
INSERT INTO ot3 VALUES(0),(3),(6);
INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='semijoin=on';
set optimizer_switch='materialization=off';
explain SELECT *
FROM   ot1
LEFT JOIN
(ot2 JOIN ot3 on ot2.a=ot3.a)
ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	8	
1	PRIMARY	ot3	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	ot2	ALL	NULL	NULL	NULL	NULL	4	Using where; Using join buffer (incremental, BNL join)
2	DEPENDENT SUBQUERY	it1	ALL	NULL	NULL	NULL	NULL	8	Using where
SELECT *
FROM   ot1
LEFT JOIN
(ot2 JOIN ot3 on ot2.a=ot3.a)
ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
a	a	a
0	0	0
6	6	6
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
7	NULL	NULL
prepare s from 'SELECT *
FROM   ot1
LEFT JOIN
(ot2 JOIN ot3 on ot2.a=ot3.a)
ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';
execute s;
a	a	a
0	0	0
6	6	6
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
7	NULL	NULL
execute s;
a	a	a
0	0	0
6	6	6
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
7	NULL	NULL
deallocate prepare s;
set optimizer_switch='materialization=on';
explain SELECT *
FROM   ot1
LEFT JOIN
(ot2 JOIN ot3 on ot2.a=ot3.a)
ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	8	
1	PRIMARY	ot3	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	ot2	ALL	NULL	NULL	NULL	NULL	4	Using where; Using join buffer (incremental, BNL join)
2	MATERIALIZED	it1	ALL	NULL	NULL	NULL	NULL	8	
SELECT *
FROM   ot1
LEFT JOIN
(ot2 JOIN ot3 on ot2.a=ot3.a)
ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
a	a	a
0	0	0
6	6	6
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
7	NULL	NULL
prepare s from 'SELECT *
FROM   ot1
LEFT JOIN
(ot2 JOIN ot3 on ot2.a=ot3.a)
ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';
execute s;
a	a	a
0	0	0
6	6	6
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
7	NULL	NULL
execute s;
a	a	a
0	0	0
6	6	6
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
7	NULL	NULL
deallocate prepare s;
set optimizer_switch=@save_optimizer_switch;
DROP TABLE ot1, ot2, ot3, it1;
#
# Bug#59919/11766739: Crash in tmp_table_param::init() with semijoin=on
#
CREATE TABLE t1 (f1 INTEGER) ENGINE=MyISAM;
CREATE TABLE t2 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
CREATE TABLE t3 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1,1), (2,1);
INSERT INTO t3 VALUES 
(1,1), (2,1), (5,4), (7,3), (8,2), (8,1), (7,3),
(9,5), (4,3), (7,2), (7,7), (3,1), (5,8), (9,7);
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='semijoin=off,materialization=on';
EXPLAIN
SELECT * FROM t3
WHERE f2 IN (SELECT t1.f1
FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	14	Using where
2	MATERIALIZED	t1	system	NULL	NULL	NULL	NULL	1	
2	MATERIALIZED	b1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	MATERIALIZED	b2	ALL	NULL	NULL	NULL	NULL	2	
SELECT * FROM t3
WHERE f2 IN (SELECT t1.f1
FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
f1	f2
1	1
2	1
8	1
3	1
set optimizer_switch='semijoin=on,materialization=on';
EXPLAIN
SELECT * FROM t3
WHERE f2 IN (SELECT t1.f1
FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
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>	ALL	distinct_key	NULL	NULL	NULL	1	
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	14	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	b1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	MATERIALIZED	b2	ALL	NULL	NULL	NULL	NULL	2	
SELECT * FROM t3
WHERE f2 IN (SELECT t1.f1
FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
f1	f2
1	1
2	1
8	1
3	1
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1, t2, t3 ;
#
#
# BUG#784723: Wrong result with semijoin + nested subqueries in maria-5.3  
#
CREATE TABLE t1 ( t1field integer, primary key (t1field));
CREATE TABLE t2 ( t2field integer, primary key (t2field));
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (2),(3),(4);
explain 
SELECT * FROM t1 A 
WHERE 
A.t1field IN (SELECT A.t1field FROM t2 B) AND 
A.t1field IN (SELECT C.t2field FROM t2 C 
WHERE C.t2field IN (SELECT D.t2field FROM t2 D));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	A	index	PRIMARY	PRIMARY	4	NULL	3	Using index
1	PRIMARY	B	index	NULL	PRIMARY	4	NULL	3	Using index; FirstMatch(A); Using join buffer (flat, BNL join)
1	PRIMARY	C	eq_ref	PRIMARY	PRIMARY	4	test.A.t1field	1	Using index
1	PRIMARY	D	eq_ref	PRIMARY	PRIMARY	4	test.A.t1field	1	Using index
SELECT * FROM t1 A 
WHERE 
A.t1field IN (SELECT A.t1field FROM t2 B) AND 
A.t1field IN (SELECT C.t2field FROM t2 C 
WHERE C.t2field IN (SELECT D.t2field FROM t2 D));
t1field
2
3
drop table t1,t2;
# 
# BUG#787299: Valgrind complains on a join query with two IN subqueries
#
create table t1 (a int);
insert into t1 values (1), (2), (3);
create table t2 as select * from t1;
select * from t1 A, t1 B
where A.a = B.a and A.a in (select a from t2 C) and B.a in (select a from t2 D);
a	a
1	1
2	2
3	3
explain
select * from t1 A, t1 B
where A.a = B.a and A.a in (select a from t2 C) and B.a in (select a from t2 D);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	3	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
1	PRIMARY	B	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<subquery3>	eq_ref	distinct_key	distinct_key	4	func	1	
2	MATERIALIZED	C	ALL	NULL	NULL	NULL	NULL	3	
3	MATERIALIZED	D	ALL	NULL	NULL	NULL	NULL	3	
drop table t1, t2;
# 
# BUG#784441: Abort on semijoin with a view as the inner table
#
CREATE TABLE t1 (a int) ;
INSERT INTO t1 VALUES (1), (1);
CREATE TABLE t2 (a int) ;
INSERT INTO t2 VALUES (1), (1);
CREATE VIEW v1 AS SELECT 1;
EXPLAIN
SELECT * FROM t1 INNER JOIN t2 ON t2.a != 0 AND t2.a IN (SELECT * FROM v1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived3>	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
3	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
SELECT * FROM t1 INNER JOIN t2 ON t2.a != 0 AND t2.a IN (SELECT * FROM v1);
a	a
1	1
1	1
1	1
1	1
DROP VIEW v1;
DROP TABLE t1,t2;
#
# BUG#751439 Assertion `!table->file || table->file->inited == handler::NONE' failed with subquery
#
CREATE TABLE t1 ( f10 int, f11 int) ;
INSERT IGNORE INTO t1 VALUES (0,0),(0,0);
CREATE TABLE t2 ( f11 int);
INSERT IGNORE INTO t2 VALUES (0),(0);
CREATE TABLE t3 ( f11 int) ;
INSERT IGNORE INTO t3 VALUES (0);
SELECT alias1.f11 AS field2
FROM ( t3 AS alias2 JOIN t1 AS alias3 ON alias3.f10 = 1)
LEFT JOIN ( t2 AS alias1 ) ON alias3.f11 = 1
WHERE alias2.f11 IN ( SELECT f11 FROM t2 )
GROUP BY field2 ;
field2
drop table t1, t2, t3;
#
# BUG#778406 Crash in hp_movelink with Aria engine and subqueries
#
CREATE TABLE t4 (f10 varchar(32) , KEY (f10)) ENGINE=Aria;
INSERT INTO t4 VALUES ('x'),('m'),('c');
CREATE TABLE t1 (f11 int) ENGINE=Aria;
INSERT INTO t1 VALUES (0),(0),(0);
CREATE TABLE t2 ( f10 int) ENGINE=Aria;
INSERT INTO t2 VALUES (0),(0),(0);
CREATE TABLE t3 ( f10 int, f11 int) ENGINE=Aria;
SELECT *
FROM t4
WHERE f10 IN
( SELECT t1.f11
FROM t1
LEFT JOIN t2 JOIN t3 ON t3.f10 = t2.f10 ON t3.f11 != 0 );
f10
x
m
c
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: 'x'
Warning	1292	Truncated incorrect DOUBLE value: 'm'
Warning	1292	Truncated incorrect DOUBLE value: 'c'
Warning	1292	Truncated incorrect DOUBLE value: 'x'
Warning	1292	Truncated incorrect DOUBLE value: 'm'
Warning	1292	Truncated incorrect DOUBLE value: 'c'
Warning	1292	Truncated incorrect DOUBLE value: 'x'
Warning	1292	Truncated incorrect DOUBLE value: 'm'
Warning	1292	Truncated incorrect DOUBLE value: 'c'
drop table t1,t2,t3,t4;
#
# BUG#751484: Valgrind warning / sporadic crash in evaluate_join_record sql_select.cc:14099 with semijoin
#
CREATE TABLE t1 ( f10 int, f11 int, KEY (f10));
INSERT IGNORE INTO t1 VALUES (0, 0),(0, 0);
CREATE TABLE t3 ( f10 int);
INSERT IGNORE INTO t3 VALUES (0);
set @tmp_751484= @@optimizer_switch;
set optimizer_switch='materialization=on';
SELECT * FROM t1
WHERE f11 IN (
SELECT C_SQ1_alias1.f11
FROM t1 AS C_SQ1_alias1
JOIN t3 AS C_SQ1_alias2
ON C_SQ1_alias2.f10 = C_SQ1_alias1.f10
);
f10	f11
0	0
0	0
set optimizer_switch='materialization=off';
SELECT * FROM t1
WHERE f11 IN (
SELECT C_SQ1_alias1.f11
FROM t1 AS C_SQ1_alias1
JOIN t3 AS C_SQ1_alias2
ON C_SQ1_alias2.f10 = C_SQ1_alias1.f10
);
f10	f11
0	0
0	0
set optimizer_switch=@tmp_751484;
drop table t1, t3;
# BUG#795530 Wrong result with subquery semijoin materialization and outer join 
#  Simplified testcase that uses DuplicateElimination
#
create table t1 (a int);
create table t2 (a int, b char(10));
insert into t1 values (1),(2);
insert into t2 values (1, 'one'), (3, 'three');
create table t3 (b char(10));
insert into t3 values('three'),( 'four');
insert into t3 values('three'),( 'four');
insert into t3 values('three'),( 'four');
insert into t3 values('three'),( 'four');
explain select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);
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	ALL	NULL	NULL	NULL	NULL	8	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t1	ALL	NULL	NULL	NULL	NULL	2	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);
b
drop table t1, t2, t3;
#
# BUG#600958 RQG: Crash in optimize_semijoin_nests
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_key int(11) DEFAULT NULL,
col_date_key date DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_date_key (col_date_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES (10,8,'2002-02-21',NULL);
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_key int(11) DEFAULT NULL,
col_date_key date DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_date_key (col_date_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;
INSERT INTO t2 VALUES (1,7,'1900-01-01','f');
SELECT col_date_key FROM t1
WHERE 5 IN (
SELECT SUBQUERY3_t1 .col_int_key
FROM t2 SUBQUERY3_t1
LEFT JOIN t1 SUBQUERY3_t2 ON SUBQUERY3_t1 .col_varchar_key
);
col_date_key
drop table t2, t1;
#
# No BUG#: Duplicate weedout check is not done for outer joins
#
create table t1 (a int);
create table t2 (a int);
insert into t1 values (1),(1),(2),(2);
insert into t2 values (1);
create table t0 (a int);
insert into t0 values (1),(2);
set @tmp_20110622= @@optimizer_switch;
set optimizer_switch='firstmatch=off,loosescan=off,materialization=off';
# Check DuplicateWeedout + join buffer
explain 
select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);
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; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where; End temporary; Using join buffer (incremental, BNL join)
select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);
a
1
2
# Check DuplicateWeedout without join buffer
set @tmp_jcl_20110622= @@join_cache_level;
set join_cache_level= 0;
explain 
select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);
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; Start temporary
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where; End temporary
select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);
a
1
2
# Check FirstMatch without join buffer:
set optimizer_switch='firstmatch=on';
explain 
select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);
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; Start temporary
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where; End temporary
select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);
a
1
2
#
# Now, check the same for multiple inner tables:
alter table t2 add b int;
update t2 set b=a;
create table t3 as select * from t2;
set optimizer_switch='firstmatch=off';
set join_cache_level= 0;
# DuplicateWeedout without join buffer
explain 
select * from t0 
where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a);
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; Start temporary
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	1	Using where
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where; End temporary
select * from t0 
where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a);
a
1
2
set @@join_cache_level=@tmp_jcl_20110622;
# DuplicateWeedout + join buffer
explain
select * from t0 
where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a);
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; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (incremental, BNL join)
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where; End temporary; Using join buffer (incremental, BNL join)
select * from t0 
where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a);
a
1
2
# Now, let the inner join side have a 'partial' match
select * from t3;
a	b
1	1
insert into t3 values(2,2);
explain
select * from t0 
where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a);
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; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using join buffer (incremental, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary; Using join buffer (incremental, BNL join)
select * from t0 
where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a);
a
1
2
set @@optimizer_switch=@tmp_20110622;
drop table t0, t1, t2, t3;
#
# BUG#802965: Crash in do_copy_not_null with semijoin=on in maria-5.3
# 
set @save_802965= @@optimizer_switch;
set optimizer_switch='semijoin=on,materialization=off,firstmatch=off,loosescan=off';
CREATE TABLE t2 ( f1 int NOT NULL , PRIMARY KEY (f1)) ;
INSERT IGNORE INTO t2 VALUES (19),(20);
CREATE TABLE t1 ( f1 int NOT NULL , PRIMARY KEY (f1)) ;
INSERT IGNORE INTO t1 VALUES (21),(22),(23),(24);
SELECT *
FROM t2 , t1
WHERE t2.f1 IN
(
SELECT SQ1_alias1.f1
FROM t1 AS SQ1_alias1 LEFT JOIN t2 AS SQ1_alias2 JOIN t2 AS SQ1_alias3 ON SQ1_alias3.f1 ON SQ1_alias3.f1
)
AND t1.f1 = t2.f1 ;
f1	f1
DROP TABLE t1, t2;
set optimizer_switch=@save_802965;
#
# BUG#803365: Crash in pull_out_semijoin_tables with outer join + semijoin + derived tables in maria-5.3 with WL#106
#
CREATE TABLE t1 ( f1 int) ;
INSERT INTO t1 VALUES (1),(1);
CREATE TABLE t2 ( f2 int) ;
INSERT INTO t2 VALUES (1),(1);
CREATE TABLE t3 ( f3 int) ;
INSERT INTO t3 VALUES (1),(1);
SELECT *
FROM t1
WHERE t1.f1 IN (
SELECT t2.f2
FROM t2
LEFT JOIN (
SELECT *
FROM t3
) AS alias1
ON alias1.f3 = t2.f2
);
f1
1
1
DROP TABLE t1,t2,t3;
#
# BUG#611704: Crash in replace_where_subcondition with nested subquery and semijoin=on
# 
CREATE TABLE t1 ( f1 int) ;
CREATE TABLE t2 ( f1 int) ;
CREATE TABLE t3 ( f1 int) ;
SELECT * FROM (
SELECT t3.*
FROM t2 STRAIGHT_JOIN t3
ON t3.f1
AND (t3.f1 ) IN (
SELECT t1.f1
FROM t1
)
) AS alias1;
f1
DROP TABLE t1,t2,t3;
# BUG#611704: another testcase:
CREATE TABLE t1 ( f1 int(11), f3 varchar(1), f4 varchar(1)) ;
CREATE TABLE t2 ( f2 int(11), KEY (f2));
CREATE TABLE t3 ( f4 varchar(1)) ;
PREPARE st1 FROM '
SELECT *
FROM t1
STRAIGHT_JOIN ( t2 STRAIGHT_JOIN t3 ON t2.f2 )
ON (t1.f3) IN ( SELECT f4 FROM t1 )
';
EXECUTE st1;
f1	f3	f4	f2	f4
DROP TABLE t1,t2,t3;
#
# BUG#803457: Wrong result with semijoin + view + outer join in maria-5.3-subqueries-mwl90
#   (Original testcase)
#
CREATE TABLE t1 (f1 int, f2 int );
INSERT INTO t1 VALUES (2,0),(4,0),(0,NULL);
CREATE TABLE t2 (f2 int, f3 int );
INSERT INTO t2 VALUES (NULL,NULL),(0,0);
CREATE TABLE t3 ( f1 int, f3 int );
INSERT INTO t3 VALUES (2,0),(4,0),(0,NULL),(4,0),(8,0);
CREATE TABLE t4 ( f2 int, KEY (f2) );
INSERT INTO t4 VALUES (0),(NULL);
CREATE VIEW v4 AS SELECT DISTINCT f2 FROM t4 ;
# The following must not have outer joins:
explain extended
SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE t2.f3 IN (SELECT * FROM t4);
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	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	100.00	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using join buffer (incremental, BNL join)
2	MATERIALIZED	t4	index	f2	f2	5	NULL	2	100.00	Using index
Warnings:
Note	1003	select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2`,`test`.`t2`.`f3` AS `f3`,`test`.`t3`.`f3` AS `f3` from `test`.`t1` semi join (`test`.`t4`) join `test`.`t2` join `test`.`t3` where `test`.`t3`.`f1` = `test`.`t1`.`f1` and `test`.`t1`.`f2` = `test`.`t2`.`f2`
SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE t2.f3 IN (SELECT * FROM t4);
f1	f2	f3	f3
2	0	0	0
4	0	0	0
4	0	0	0
drop view v4;
drop table t1, t2, t3, t4;
#
# BUG#803303: Wrong result with semijoin=on, outer join in maria-5.3-subqueries-mwl90
#
# Testcase#1:
set @tmp803303= @@optimizer_switch;
set optimizer_switch = 'semijoin=on,materialization=off,firstmatch=off,loosescan=off';
CREATE TABLE t2 ( f1 int) ;
INSERT IGNORE INTO t2 VALUES (6),(8);
CREATE TABLE t1 ( f1 int, f2 int, f3 int) ;
INSERT IGNORE INTO t1 VALUES (8,0,0),(7,0,0),(9,0,0);
SELECT alias2.f1
FROM t2 AS alias1
LEFT JOIN ( t1 AS alias2 JOIN t1 AS alias3 ON alias3.f2 = alias2.f3 )
ON alias3.f2 = alias2.f2
WHERE alias2.f1 IN ( SELECT f1 FROM t2 AS alias4 ) ;
f1
8
8
8
8
8
8
drop table t1,t2;
set optimizer_switch= @tmp803303;
# Testcase #2:
CREATE TABLE t1 ( f10 int) ;
INSERT INTO t1 VALUES (0),(0);
CREATE TABLE t2 ( f10 int, f11 varchar(1)) ;
INSERT INTO t2 VALUES (0,'a'),(0,'b');
CREATE TABLE t3 ( f10 int) ;
INSERT INTO t3 VALUES (0),(0),(0),(0),(0);
CREATE TABLE t4 ( f10 varchar(1), f11 int) ;
INSERT INTO t4 VALUES ('a',0),('b',0);
SELECT * FROM t1
LEFT JOIN ( t2 JOIN t3 ON t3.f10 = t2.f10 ) ON t1.f10 = t2.f10
WHERE t2.f10 IN (
SELECT t4.f11
FROM t4
WHERE t4.f10 != t2.f11
);
f10	f10	f11	f10
0	0	b	0
0	0	b	0
0	0	a	0
0	0	a	0
0	0	b	0
0	0	b	0
0	0	a	0
0	0	a	0
0	0	b	0
0	0	b	0
0	0	a	0
0	0	a	0
0	0	b	0
0	0	b	0
0	0	a	0
0	0	a	0
0	0	b	0
0	0	b	0
0	0	a	0
0	0	a	0
drop table t1,t2,t3,t4;
#
# BUG#803457: Wrong result with semijoin + view + outer join in maria-5.3-subqueries-mwl90
#
set @tmp803457=@@optimizer_switch;
set optimizer_switch='materialization=off';
CREATE TABLE t1 (f1 int, f2 int );
INSERT INTO t1 VALUES (2,0),(4,0),(0,NULL);
CREATE TABLE t2 (f2 int, f3 int );
INSERT INTO t2 VALUES (NULL,NULL),(0,0);
CREATE TABLE t3 ( f1 int, f3 int );
INSERT INTO t3 VALUES (2,0),(4,0),(0,NULL),(4,0),(8,0);
CREATE TABLE t4 ( f2 int);
INSERT INTO t4 VALUES (0),(NULL);
# The following uses Duplicate Weedout, and "End temporary" must not be
#   in the middle of the inner side of an outer join:
explain 
SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE IFNULL(t2.f3,'foo') IN (SELECT * FROM t4);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	5	Using where; Using join buffer (incremental, BNL join)
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	Using where; Start temporary; End temporary; Using join buffer (incremental, BNL join)
SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3 ) WHERE IFNULL(t2.f3,'foo') IN (SELECT * FROM t4);
f1	f2	f3	f3
2	0	0	0
4	0	0	0
4	0	0	0
0	NULL	NULL	NULL
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: 'foo'
Warning	1292	Truncated incorrect DOUBLE value: 'foo'
DROP TABLE t1, t2, t3, t4;
set @tmp803457=@@optimizer_switch;
#
# BUG#818280: crash in do_copy_not_null() in maria-5.3 with semijoin
#
CREATE TABLE t1 ( c1 int NOT NULL , c2 int NOT NULL, PRIMARY KEY (c1)) ;
INSERT IGNORE INTO t1 VALUES (2,7),(1,3),(5,6);
CREATE TABLE t3 ( c1 int NOT NULL , c2 int NOT NULL, PRIMARY KEY (c1)) ;
INSERT IGNORE INTO t3 VALUES (2,7),(1,3),(5,6);
CREATE TABLE t2 ( c1 int NOT NULL , c5 int NOT NULL );
INSERT IGNORE INTO t2 VALUES (2,2),(2,2),(5,6);
SELECT * FROM t1 WHERE c1 IN ( SELECT t3.c1 FROM t3 LEFT JOIN t2 ON t2 .c1 = t3 .c1 WHERE t2.c5 != 0 );
c1	c2
2	7
5	6
DROP TABLE t1, t2, t3;
#
# BUG#834534: Assertion `0' failed in replace_where_subcondition with semijoin subquery in HAVING
#
CREATE TABLE t1 ( d int );
INSERT INTO t1 VALUES (2),(2),(0),(2),(2);
CREATE TABLE t2 ( b int );
INSERT INTO t2 VALUES (4),(3),(3);
CREATE TABLE t3 ( a int );
SELECT *
FROM t3
WHERE (t3.a) IN (
SELECT t1.d
FROM t1
HAVING ( 4 ) IN (
SELECT t2.b
FROM t2
)
);
a
drop table t1, t2,t3;
#
# BUG#834758: Wrong result with innner join, LooseScan, two-column IN() predicate
#
set @tmp835758=@@optimizer_switch;
set optimizer_switch='semijoin=on,loosescan=on,materialization=off,firstmatch=off';
CREATE TABLE t1 (b int) ;
INSERT INTO t1 VALUES (1),(5);
CREATE TABLE t2 (a int, PRIMARY KEY (a)) ;
INSERT INTO t2 VALUES (6),(10);
CREATE TABLE t3 (a int, b int, KEY (b)) ;
INSERT INTO t3 VALUES (6,5),(6,2),(8,0),(9,1),(6,5);
# This used to incorrectly pick a join order of (t1, LooseScan(t3), t2):
explain 
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t2	index	PRIMARY	PRIMARY	4	NULL	2	Using index; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	b	NULL	NULL	NULL	5	Using where; Start temporary; End temporary; Using join buffer (incremental, BNL join)
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
b	a
5	6
DROP TABLE t1, t2, t3;
set @@optimizer_switch= @tmp835758;
#
# BUG#834739: Wrong result with 3-way inner join, LooseScan,multipart keys  
#
set @tmp834739=@@optimizer_switch;
set optimizer_switch='semijoin=on,loosescan=on,materialization=off,firstmatch=off';
CREATE TABLE t2 ( b int, c int, KEY (b)) ;
INSERT INTO t2 VALUES (1,0),(1,0),(9,0),(1,0),(5,0);
INSERT INTO t2 VALUES (2,0),(3,0),(8,0),(6,0),(5,0);
CREATE TABLE t3 ( a int);
INSERT INTO t3 VALUES (0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0);
CREATE TABLE t4 ( a int);
INSERT INTO t4 VALUES (0),(0),(0);
CREATE TABLE t5 ( b int, a int , KEY (a,b)) ;
INSERT INTO t5 VALUES (7,0),(9,0);
explain
SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t5	index	a	a	10	NULL	2	Using index; Start temporary
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (flat, BNL join)
1	PRIMARY	t2	ALL	b	NULL	NULL	NULL	10	Using where; Using join buffer (incremental, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	15	Using where; End temporary; Using join buffer (incremental, BNL join)
SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);
a
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DROP TABLE t2, t3, t4, t5;
set @@optimizer_switch=@tmp834739;
#
# BUG#830993: Crash in end_read_record with derived table
#
set @tmp_830993=@@optimizer_switch;
set optimizer_switch='semijoin=on,loosescan=off,materialization=off,firstmatch=off';
set @tmp_830993_jbs= @@join_buffer_size;
set join_buffer_size=160;
CREATE TABLE t1 (
a int(11) NOT NULL AUTO_INCREMENT, 
b int(11) DEFAULT NULL, 
c int(11) DEFAULT NULL, 
d time DEFAULT NULL, 
e varchar(1) DEFAULT NULL, 
f varchar(1) DEFAULT NULL, 
PRIMARY KEY (a), 
KEY c (c), 
KEY d (d), 
KEY e (e,c)
);
INSERT INTO t1 VALUES (10,NULL,8,'22:55:23','x','x'),
(11,8,7,'10:19:31','d','d'),(12,1,1,'14:40:36','r','r'),
(13,9,7,'04:37:47','f','f'),(14,4,9,'19:34:06','y','y'),
(15,3,NULL,'20:35:33','u','u'),(16,2,1,NULL,'m','m'),
(17,NULL,9,'14:43:37',NULL,NULL),(18,2,2,'02:23:09','o','o'),
(19,NULL,9,'01:22:45','w','w'),(20,6,2,'00:00:00','m','m'),
(21,7,4,'00:13:25','q','q'),(22,2,0,'03:47:16',NULL,NULL),
(23,5,4,'01:41:48','d','d'),(24,7,8,'00:00:00','g','g'),
(25,6,NULL,'22:32:04','x','x'),(26,6,NULL,'16:44:14','f','f'),
(27,2,0,'17:38:37','p','p'),(28,9,NULL,'08:46:48','j','j'),
(29,6,8,'14:11:27','c','c');
CREATE TABLE t2 like t1;
INSERT INTO t2 VALUES (1,2,4,'22:34:09','v','v'),
(2,150,62,'14:26:02','v','v'),(3,NULL,7,'14:03:03','c','c'),
(4,2,1,'01:46:09',NULL,NULL),(5,5,0,'16:21:18','x','x'),
(6,3,7,'18:56:33','i','i'),(7,1,7,NULL,'e','e'),
(8,4,1,'09:29:08','p','p'),(9,NULL,7,'19:11:10','s','s'),
(10,2,1,'11:57:26','j','j'),(11,6,5,'00:39:46','z','z'),
(12,6,2,'03:28:15','c','c'),(13,8,0,'06:44:18','a','a'),
(14,2,1,'14:36:39','q','q'),(15,6,8,'18:42:45','y','y'),
(16,8,1,'02:57:29',NULL,NULL),(17,3,1,'16:46:13','r','r'),
(18,3,9,'19:39:02','v','v'),(19,9,1,NULL,NULL,NULL),
(20,6,5,'20:58:33','r','r');
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
explain
SELECT
alias1.a, alias1.b, alias1.c, alias1.d, alias1.e, alias1.f,
alias2.a as a2_a, alias2.b as a2_b, alias2.c as a2_c, alias2.d as a2_d, 
alias2.e as a2_e, alias2.f as a2_f,
t2.a as t2_a, t2.b as t2_b, t2.c as t2_c, t2.d as t2_d, t2.e as t2_e, t2.f as t2_f
FROM 
(SELECT * FROM t2) AS alias1,
t1 AS alias2, 
t2
WHERE 
alias1.c IN (SELECT SQ3_alias1.b 
FROM t2 AS SQ3_alias1 STRAIGHT_JOIN t2 AS SQ3_alias2)
LIMIT 100;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	SQ3_alias1	ALL	NULL	NULL	NULL	NULL	20	Start temporary
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	SQ3_alias2	index	NULL	PRIMARY	4	NULL	20	Using index; End temporary; Using join buffer (incremental, BNL join)
1	PRIMARY	alias2	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (incremental, BNL join)
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (incremental, BNL join)
2	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	20	
create table t3 as
SELECT 
alias1.a, alias1.b, alias1.c, alias1.d, alias1.e, alias1.f,
alias2.a as a2_a, alias2.b as a2_b, alias2.c as a2_c, alias2.d as a2_d, 
alias2.e as a2_e, alias2.f as a2_f,
t2.a as t2_a, t2.b as t2_b, t2.c as t2_c, t2.d as t2_d, t2.e as t2_e, t2.f as t2_f
FROM 
(SELECT * FROM t2) AS alias1,
t1 AS alias2, 
t2
WHERE 
alias1.c IN (SELECT SQ3_alias1.b 
FROM t2 AS SQ3_alias1 STRAIGHT_JOIN t2 AS SQ3_alias2)
LIMIT 100;
set optimizer_switch=@tmp_optimizer_switch;
drop table t1,t2, t3;
set optimizer_switch=@tmp_830993;
set join_buffer_size= @tmp_830993_jbs;
#
# BUG##849717: Crash in Item_func::fix_fields on second execution of a prepared statement with semijoin
#
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int);
CREATE TABLE t3 (a int, b int) ;
PREPARE st1 FROM "SELECT * FROM t2 LEFT JOIN t1 ON t2.a != 0 AND ('j','r') IN ( SELECT b,a FROM t3)";
EXECUTE st1;
a	a
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: 'j'
Warning	1292	Truncated incorrect DOUBLE value: 'r'
EXECUTE st1;
a	a
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: 'j'
Warning	1292	Truncated incorrect DOUBLE value: 'r'
DROP TABLE t1, t2, t3;
#
# BUG#849776: Wrong result with semijoin + "Impossible where"
#
CREATE TABLE t1 ( b varchar(1), a integer) ;
INSERT INTO t1 VALUES ('z',8);
CREATE TABLE t2 ( a integer, b varchar(1)) ;
CREATE TABLE t4 ( a integer, b varchar(1)) ;
CREATE TABLE t5 ( a integer) ;
INSERT INTO t5 VALUES (8);
select * from t5 where (a) in (
SELECT t1.a 
FROM t1 LEFT JOIN t2 ON t1.a = t2.a
WHERE t2.b NOT IN (SELECT t4.b FROM t4 WHERE t4.b < t1.b)
);
a
8
DROP TABLE t1, t2, t4, t5;
#
# BUG#861147: Assertion `fixed == 1' failed in Item_func_eq::val_int() with semijoin + materialization + max_join_size
#
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
set @tmp_mjs_861147= @@max_join_size;
SET max_join_size=10;
set @tmp_os_861147= @@optimizer_switch;
set @@optimizer_switch='semijoin=on,materialization=on';
explain
select * from t1 where a in (select max(A.a + B.a + C.a) from t1 A, t1 B, t1 C);
ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay
set max_join_size= @tmp_mjs_861147;
set optimizer_switch= @tmp_os_861147;
drop table t1;
#
# BUG#877288: Wrong result with semijoin + materialization + multipart key
#
set @tmp_877288=@@optimizer_switch;
set optimizer_switch='semijoin=ON,materialization=ON';
CREATE TABLE t1 ( a int) ;
INSERT INTO t1 VALUES (19),(19),(19),(20),(20),(20),(20),(20),(20);
CREATE TABLE t2 ( b int NOT NULL , c int NOT NULL , KEY (b,c)) ;
INSERT INTO t2 VALUES (14,1),(15,1),(16,1),(17,1),(18,1),(19,1),(20,1);
CREATE TABLE t3 ( a int, d int) ;
INSERT INTO t3 VALUES (19,1),(7,1),(3,1),(3,1),(20,1),(3,1),(16,1),(17,1),(9,1),(4,1),(6,1),(15,1),(17,1);
explain
SELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	13	Using where
2	MATERIALIZED	t2	ref	b	b	4	test.t3.a	1	Using index
SELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);
a
19
19
19
20
20
20
20
20
20
DROP TABLE t1,t2,t3;
set optimizer_switch=@tmp_877288;
#
# BUG#878753: Assertion '0' failed in replace_where_subcondition with derived_merge
#
set @tmp878753= @@optimizer_switch;
set optimizer_switch= 'semijoin=on,derived_merge=on';
CREATE TABLE t1 (b int(11)) ;
CREATE TABLE t2 (c int, b int, d varchar(52) NOT NULL) ;
CREATE TABLE t3 (b int(11)) ;
PREPARE st1 FROM '
        SELECT * FROM t1
        JOIN (
                SELECT t2.* FROM t2
                WHERE t2.d <> "a"
                AND t2.c IN (
                        SELECT t3.b
                        FROM t3
                )
        ) AS alias2
        ON ( alias2.b = t1.b );
';
EXECUTE st1;
b	c	b	d
DROP TABLE t1,t2,t3;
set optimizer_switch=@tmp878753;
#
# Bug #889750: semijoin=on + firstmatch=off + semijoin_with_cache=off
#
create table t1 (a int);
insert into t1 values (7), (1), (5), (3);
create table t2 (a int);
insert into t2 values (4), (1), (8), (3), (9), (2);
set @tmp_otimizer_switch= @@optimizer_switch;
set optimizer_switch='semijoin=on';
set optimizer_switch='firstmatch=off';
set optimizer_switch='semijoin_with_cache=on';
explain
select * from t1 where t1.a in (select t2.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	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	6	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
select * from t1 where t1.a in (select t2.a from t2);
a
1
3
set optimizer_switch='semijoin_with_cache=off';
explain
select * from t1 where t1.a in (select t2.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	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	6	Using where; Start temporary; End temporary
select * from t1 where t1.a in (select t2.a from t2);
a
1
3
set optimizer_switch= @tmp_otimizer_switch;
drop table t1,t2;
#
# Bug #887496: semijoin with IN equality for the second part of an index
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (9), (0), (8), (5);
CREATE TABLE t2 (a int, b varchar(1), INDEX idx (b,a));
INSERT INTO t2 VALUES (5,'r'), (5,'z');
CREATE TABLE t3 (a int, b varchar(1), INDEX idx (b,a));
INSERT INTO t3 VALUES (5,'r'), (5,'z');
set @tmp_otimizer_switch= @@optimizer_switch;
SET SESSION optimizer_switch='semijoin=on,firstmatch=on';
SET SESSION optimizer_switch='loosescan=off';
EXPLAIN
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	index	idx	idx	9	NULL	2	Using where; Using index; Start temporary
1	PRIMARY	t3	ref	idx	idx	4	test.t2.b	1	Using index
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where; End temporary; Using join buffer (flat, BNL join)
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
a
5
SET SESSION optimizer_switch='loosescan=on';
EXPLAIN
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	index	idx	idx	9	NULL	2	Using where; Using index; Start temporary
1	PRIMARY	t3	ref	idx	idx	4	test.t2.b	1	Using index
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where; End temporary; Using join buffer (flat, BNL join)
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
a
5
set optimizer_switch= @tmp_otimizer_switch;
DROP TABLE t1,t2,t3;
#
# Bug #901312: materialized semijoin + right join
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (4), (1);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (4), (1);
CREATE TABLE t3 (c int);
INSERT INTO t3 VALUES (4), (1);
set @tmp_otimizer_switch= @@optimizer_switch;
SET SESSION optimizer_switch='semijoin=on,materialization=on';
EXPLAIN
SELECT * FROM t1 RIGHT JOIN t2 ON b = a WHERE t2.b IN (SELECT c 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	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	
SELECT * FROM t1 RIGHT JOIN t2 ON b = a WHERE t2.b IN (SELECT c FROM t3);
a	b
4	4
1	1
set optimizer_switch= @tmp_otimizer_switch;
DROP TABLE t1,t2,t3;
#
# Bug #901709: assertion failure with record count == 0 
#
CREATE TABLE t1 (a int, KEY (a));
INSERT INTO t1 VALUES (4), (6);
CREATE TABLE t2 (a int, KEY (a));
INSERT INTO t2 VALUES (4), (6);
CREATE TABLE t3 (b int);
INSERT INTO t3 VALUES (4);
CREATE TABLE t4 (c int);
SET @tmp_optimizer_switch=@@optimizer_switch;
SET @@optimizer_switch='semijoin=on';
SET @@optimizer_switch='materialization=on';
SET @@optimizer_switch='firstmatch=on';
SET optimizer_switch='semijoin_with_cache=on';
SET optimizer_prune_level=0;
EXPLAIN
SELECT * FROM t1, t2
WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	1	
1	PRIMARY	t1	ref	a	a	5	const	1	Using index
1	PRIMARY	t2	ref	a	a	5	func	1	Using index
2	MATERIALIZED	t4	ALL	NULL	NULL	NULL	NULL	0	
SELECT * FROM t1, t2
WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);
a	a
SET optimizer_prune_level=DEFAULT;
SET optimizer_switch=@tmp_optimizer_switch;
DROP TABLE t1,t2,t3,t4;
#
# BUG#901399: Wrong result (extra row) with semijoin=ON, materialization=OFF, optimizer_prune_level=0
#
set @opl_901399= @@optimizer_prune_level;
set @os_091399= @@optimizer_switch;
SET optimizer_prune_level=0;
SET optimizer_switch = 'materialization=off';
CREATE TABLE t1 ( c INT ) ENGINE=MyISAM;
INSERT INTO t1 VALUES
(0),(1),(2),(3),(4),(5),
(6),(7),(8),(9),(10),(11),(12);
CREATE TABLE t2 ( a INT, b INT, KEY(a)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3,20),(2,21),(3,22);
SELECT *
FROM t1 AS alias1, t1 AS alias2
WHERE ( alias1.c, alias2.c )
IN (
SELECT alias3.a, alias3.a
FROM t2 AS alias3, t2 alias4
WHERE alias3.b = alias4.b
);
c	c
2	2
3	3
set optimizer_prune_level= @opl_901399;
set optimizer_switch= @os_091399;
DROP TABLE t1,t2;
#
# BUG#912510: Crash in do_copy_not_null with semijoin=ON, firstmatch=ON, aggregate ...
#
CREATE TABLE t1 ( a VARCHAR(1) NOT NULL );
INSERT INTO t1 VALUES ('k'),('l');
CREATE TABLE t2 ( b VARCHAR(1) NOT NULL, KEY(b) );
INSERT INTO t2 VALUES ('k'),('l');
CREATE TABLE t3 ( c VARCHAR(1) NOT NULL, KEY(c) );
INSERT INTO t3 VALUES ('m'),('n');
SELECT a, COUNT(*) FROM t1
WHERE a IN (
SELECT b FROM t2 force index(b), t3 force index(c)
WHERE c = b AND b = a
);
a	COUNT(*)
NULL	0
DROP TABLE t1, t2, t3;
#
# BUG#920255: Wrong result (extra rows) with loosescan and IN subquery
#
CREATE TABLE t1 ( a INT PRIMARY KEY, b INT, KEY(b) );
INSERT INTO t1 VALUES
(1,2),(2,1),(3,3),(4,2),(5,5),
(6,3),(7,1),(8,4),(9,3),(10,2);
CREATE TABLE t2 ( c INT, d INT, UNIQUE KEY(c) );
INSERT INTO t2 VALUES
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
SELECT a, b, d FROM t1, t2
WHERE ( b, d ) IN
( SELECT b, d FROM t1, t2 WHERE b = c );
a	b	d
1	2	1
1	2	1
2	1	2
2	1	2
3	3	3
3	3	3
4	2	1
4	2	1
5	5	5
6	3	3
6	3	3
7	1	2
7	1	2
8	4	2
8	4	2
9	3	3
9	3	3
10	2	1
10	2	1
DROP TABLE t1, t2;
#
# BUG#920713: Wrong result (missing rows) with firstmatch+BNL, IN subquery, ...
#
CREATE TABLE t1 ( a VARCHAR(1) ) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('e'),('w'),('a'),('h'),('x'),('k'),('g');
CREATE TABLE t2 ( b INT, c VARCHAR(1) );
INSERT INTO t2 VALUES (0,'j'),(8,'v');
SELECT * FROM t1 alias1, t2 alias2
WHERE alias2.c IN (
SELECT alias4.c FROM t1 alias3, t2 alias4
);
a	b	c
e	0	j
e	8	v
w	0	j
w	8	v
a	0	j
a	8	v
h	0	j
h	8	v
x	0	j
x	8	v
k	0	j
k	8	v
g	0	j
g	8	v
DROP TABLE t1, t2;
#
# BUG#923246: Loosescan reports different result than other semijoin methods
#
set @tmp_923246= @@optimizer_switch;
set optimizer_switch='mrr=on,materialization=off';
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;
select * from t3 where a in (select kp1 from t1 where kp1<20);
a
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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)
drop table t0,t1,t3;
set optimizer_switch= @tmp_923246;
#
# BUG#952583: Server crashes in Item_field::fix_after_pullout on INSERT .. SELECT
# 
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 ( b INT );
INSERT INTO t2 VALUES (3),(4);
INSERT INTO t1
SELECT * FROM ( SELECT * FROM t1 ) AS alias
WHERE a IN ( SELECT b FROM t2 );
DROP TABLE t1, t2;
#
# BUG#952372: Server crashes on 2nd execution of PS in find_field_in_tables with semijoin+materialization
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (2),(3);
CREATE VIEW v1 AS SELECT * FROM t1;
CREATE TABLE t2 ( b VARCHAR(1) );
INSERT INTO t2 VALUES ('v'),('v');
PREPARE pstmt FROM
'SELECT DISTINCT a FROM v1, t2
   WHERE b IN ( SELECT MIN(b) FROM t2 )';
EXECUTE pstmt;
a
2
3
EXECUTE pstmt;
a
2
3
DEALLOCATE PREPARE pstmt;
DROP VIEW v1;
DROP TABLE t1, t2;
#
# BUG#978479: Wrong result (extra rows) with derived_with_keys+loosescan+semijoin=ON, materialization=OFF
#
set @tmp_jcl_978479= @@join_cache_level;
set join_cache_level=0;
set @tmp_os_978479= @@optimizer_switch;
set optimizer_switch = 'derived_with_keys=on,loosescan=on,semijoin=on,materialization=off';
# Part#1: make sure EXPLAIN is using LooseScan:
CREATE TABLE t1 ( a INT, b INT );
INSERT INTO t1 VALUES
(4,0),(6,8),(3,1),(5,8),(3,9),(2,4),
(2,6),(9,1),(5,4),(7,7),(5,4);
CREATE ALGORITHM=TEMPTABLE
VIEW v1 AS SELECT * FROM t1;
# This will use LooseScan:
EXPLAIN
SELECT * FROM t1 AS t1_1, t1 AS t1_2
WHERE (t1_1.a, t1_2.a) IN ( SELECT a, b FROM v1 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1_1	ALL	NULL	NULL	NULL	NULL	11	Using where
1	PRIMARY	<derived3>	ref	key0	key0	5	test.t1_1.a	2	Start temporary
1	PRIMARY	t1_2	ALL	NULL	NULL	NULL	NULL	11	Using where; End temporary
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	11	
SELECT * FROM t1 AS t1_1, t1 AS t1_2
WHERE (t1_1.a, t1_2.a) IN ( SELECT a, b FROM v1 );
a	b	a	b
3	1	9	1
5	8	4	0
3	9	9	1
2	4	6	8
2	4	4	0
2	6	6	8
2	6	4	0
5	4	4	0
7	7	7	7
5	4	4	0
DROP VIEW v1;
DROP TABLE t1;
set @@join_cache_level= @tmp_jcl_978479;
set @@optimizer_switch= @tmp_os_978479;
#
# BUG#998236: Assertion failure or valgrind errors at best_access_path ...
#
CREATE TABLE t1 (a1 VARCHAR(3), a2 VARCHAR(35), KEY(a1,a2)) ENGINE=MyISAM;
INSERT INTO t1 VALUES
('USA','Arvada'),('USA','Athens'),('USA','Atlanta'),('USA','Augusta'),
('USA','Aurora'),('USA','Aurora'),('USA','Austin'),('USA','Bakersfield'),
('USA','Baltimore'),('USA','Baton'),('USA','Beaumont'),('USA','Bellevue'),
('USA','Berkeley'),('USA','Billings'),('USA','Birmingham'),('USA','Boise'),
('USA','Boston'),('USA','Boulder'),('USA','Bridgeport'),('USA','Brockton'),
('USA','Brownsville'),('USA','Buffalo'),('USA','Burbank'),('USA','Cambridge'),
('USA','Cape'),('USA','Carrollton'),('USA','Carson'),('USA','Cary'),
('USA','Cedar'),('USA','Chandler'),('USA','Charleston'),('USA','Charlotte'),
('USA','Chattanooga'),('USA','Chesapeake'),('USA','Chicago'),('USA','Chula'),
('USA','Cincinnati'),('USA','Citrus'),('USA','Clarksville'),('USA','Clearwater'),
('USA','Cleveland'),('USA','Colorado'),('USA','Columbia'),('USA','Columbus'),
('USA','Columbus'),('USA','Compton'),('USA','Concord'),('USA','Coral'),
('USA','Corona'),('USA','Corpus'),('USA','Costa'),('USA','Dallas'),('USA','Daly'),
('USA','Davenport'),('USA','Dayton'),('USA','Denver'),('USA','DesMoines'),
('USA','Detroit'),('USA','Downey'),('USA','Durham'),('USA','East'),('USA','ElCajon'),
('USA','ElMonte'),('USA','ElPaso'),('USA','Elgin'),('USA','Elizabeth'),
('USA','Erie'),('USA','Escondido'),('USA','Eugene'),('USA','Evansville'),
('USA','Fairfield'),('USA','Fall'),('USA','Fayetteville'),('USA','Flint'),
('USA','Fontana'),('USA','FortCollins'),('USA','FortLauderdale'),('USA','FortWayne'),
('USA','FortWorth'),('USA','Fremont'),('USA','Fresno'),('USA','Fullerton'),
('USA','Gainesville'),('USA','GardenGrove'),('USA','Garland'),('USA','Gary'),
('USA','Gilbert'),('USA','Glendale'),('USA','Glendale'),('USA','GrandPrairie'),
('USA','GrandRapids'),('USA','Green Bay'),('USA','Greensboro'),('USA','Hampton'),
('USA','Hartford'),('USA','Hayward'),('USA','Henderson'),('USA','Hialeah'),
('USA','Inglewood'),('USA','Livonia');
CREATE TABLE t3 (c1 VARCHAR(3), c2 VARCHAR(16), PRIMARY KEY (c1,c2)) ENGINE=MyISAM;
INSERT INTO t3 VALUES ('USA','Chinese'), ('USA','English');
CREATE TABLE t2 (b1 INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1);
SELECT alias1.a1 AS field1
FROM t1 AS alias1, t1 AS alias2
WHERE alias1.a2 IN ( SELECT a1 FROM t1, t2 )
AND alias1.a1 IS NULL
AND ( alias1.a1, alias2.a1 ) IN ( SELECT c1, c1 FROM t3 )
GROUP BY field1;
field1
DROP TABLE t1,t3,t2;
#
#  BUG#1002630: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with SELECT
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(7);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (4),(6);
SELECT ( SELECT SUM(a) FROM t1 ) AS t1sum, b
FROM t2
WHERE (1,1) IN ( SELECT MAX(a), MIN(a) FROM t1 )
GROUP BY b
HAVING t1sum <> 1;
t1sum	b
DROP TABLE t1, t2;
#
# MDEV-3911: Assertion `fixed == 0' failed in Item_field::fix_fields
# on 2nd execution of PS with semijoin=on and IN subquery
#
CREATE TABLE t1 (a INT, b INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (0,4),(8,6);
CREATE TABLE t2 (c INT, d INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (7,1),(0,7);
PREPARE stmt FROM ' SELECT * FROM t1 WHERE ( a, b ) IN ( SELECT c, d FROM t2 ) ';
execute stmt;
a	b
execute stmt;
a	b
deallocate prepare stmt;
drop table t1,t2;
#
# MDEV-4335: Unexpected results when selecting on information_schema
#
CREATE TABLE t1 (db VARCHAR(64) DEFAULT NULL);
INSERT INTO t1 VALUES ('mysql'),('information_schema');
SELECT * FROM t1 WHERE db IN (SELECT `SCHEMA_NAME` FROM information_schema.SCHEMATA);
db
information_schema
mysql
DROP TABLE t1;
#
# MDEV-5581: Server crashes in in JOIN::prepare on 2nd execution of PS with materialization+semijoin
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (2),(3);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (8),(9);
CREATE TABLE t3 (c INT, INDEX(c));
INSERT INTO t2 VALUES (5),(6);
PREPARE stmt FROM 
"SELECT * FROM t1 WHERE ( 9, 5 ) IN ( SELECT b, COUNT(*) FROM t2 WHERE 1 IN ( SELECT MIN(c) FROM t3 ) )";
EXECUTE stmt;
a
EXECUTE stmt;
a
DROP TABLE t1,t2,t3;
#
# MySQL Bug#13340270: assertion table->sort.record_pointers == __null
#
CREATE TABLE t1 (
pk int NOT NULL,
col_int_key int DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
INSERT INTO t1 VALUES
(10,8,'x','x'),
(11,7,'d','d'),
(12,1,'r','r'),
(13,7,'f','f'),
(14,9,'y','y'),
(15,NULL,'u','u'),
(16,1,'m','m'),
(17,9,NULL,NULL),
(18,2,'o','o'),
(19,9,'w','w'),
(20,2,'m','m'),
(21,4,'q','q');
CREATE TABLE t2
SELECT alias1.col_varchar_nokey AS field1
FROM t1 AS alias1 JOIN t1 AS alias2
ON alias2.col_int_key = alias1.pk OR
alias2.col_int_key = alias1.col_int_key
WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o'

;
EXPLAIN SELECT *
FROM t2
WHERE (field1) IN (SELECT alias1.col_varchar_nokey AS field1
FROM t1 AS alias1 JOIN t1 AS alias2
ON alias2.col_int_key = alias1.pk OR
alias2.col_int_key = alias1.col_int_key
WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o'
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	alias1	index_merge	PRIMARY,col_int_key,col_varchar_key	PRIMARY,col_varchar_key	4,4	NULL	2	Using sort_union(PRIMARY,col_varchar_key); Using where
1	PRIMARY	alias2	ALL	col_int_key	NULL	NULL	NULL	12	Range checked for each record (index map: 0x2); FirstMatch(t2)
SELECT *
FROM t2
WHERE (field1) IN (SELECT alias1.col_varchar_nokey AS field1
FROM t1 AS alias1 JOIN t1 AS alias2
ON alias2.col_int_key = alias1.pk OR
alias2.col_int_key = alias1.col_int_key
WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o'
);
field1
o
o
DROP TABLE t1, t2;
#
# MDEV-389: Wrong result (missing row) with semijoin, join_cache_level>4, LEFT JOIN...
#  (testcase only)
#
connect  con1,localhost,root,,;
connection con1;
SET join_cache_level = 5;
SET optimizer_switch = 'semijoin=on';
CREATE TABLE t1 (a INT NOT NULL, b CHAR(1), KEY(a)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (4,'p'),(1,'q'),(8,'e');
CREATE TABLE t2 (c INT, d CHAR(1), KEY(c), KEY(d)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (4,'f'),(2,'i'),(5,'h'),(3,'q'),(1,'g');
SELECT a, COUNT(*) AS cnt 
FROM t1 LEFT JOIN t2 ON (d = b) 
WHERE a IN ( SELECT c FROM t2 WHERE b > 'k' ) 
GROUP BY a ORDER BY a, cnt LIMIT 2;
a	cnt
1	1
4	1
drop table t1, t2;
connection default;
disconnect con1;
#
# MDEV-4071: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with ...
#
CREATE TABLE t1 (b INT, c VARCHAR(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (7,'v'),(0,'s');
CREATE TABLE t2 (a INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (0),(8);
SELECT c, SUM( DISTINCT b ) AS sm FROM t1
WHERE ( 5, 108 ) IN ( SELECT MIN(a), MAX(a) FROM t2 )
GROUP BY b
HAVING c <> ( SELECT MAX( c ) FROM t1 )
ORDER BY sm;
c	sm
DROP TABLE t1,t2;
# 
# mdev-4173 ignored duplicate value when converting heap to temp table
# could lead to extra rows in semijoin queries or missing row in union queries
#
CREATE TABLE t1 (i1 INT) engine=myisam;
INSERT INTO t1 VALUES
(4),(8),(0),(0),(0),(7),(7),(5),(3),(4),(9),(6),(1),(5),(6),(2),(4),(4);
CREATE TABLE t2 (i2 INT, j2 INT) engine=myisam;
INSERT INTO t2 VALUES
(7,1),(0,7),(9,4),(3,7),(4,0),(2,2),(5,9),(3,4),
(1,0),(3,9),(5,8),(1,8),(204,18),(224,84),(9,6);
CREATE TABLE t3 (i3 INT, KEY(i3)) engine=myisam;
INSERT INTO t3 VALUES
(0),(8),(1),(8),(9),(24),(6),(1),(6),(2),(4),(2),(1);
select @@max_heap_table_size into @tmp_max_heap_table_size;
select @@join_buffer_size into @tmp_join_buffer_size;
set max_heap_table_size=16*1024;
COUNT(*)
2834
COUNT(*)
2834
COUNT(*)
2834
COUNT(*)
2834
COUNT(*)
2834
COUNT(*)
2834
COUNT(*)
2834
COUNT(*)
2834
DROP TABLE t1, t2, t3;
set join_buffer_size = @tmp_join_buffer_size;
set max_heap_table_size = @tmp_max_heap_table_size;
#
# MDEV-5161: Wrong result (missing rows) with semijoin, LEFT JOIN, ORDER BY, constant table
#
CREATE TABLE t1 (pk INT PRIMARY KEY, c1 VARCHAR(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,'v'),(2,'v'),(3,'c'),(4,NULL),(5,'x');
CREATE TABLE t2 (c2 VARCHAR(1)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('x');
CREATE TABLE t3 (c3 VARCHAR(1)) ENGINE=MyISAM;
INSERT INTO t3 VALUES ('x'),('d');
SELECT * FROM t1, t2 WHERE pk IN ( SELECT pk FROM t1 LEFT JOIN t3 ON (c1 = c3 ) ) ORDER BY c2, c1;
pk	c1	c2
1	v	x
2	v	x
3	c	x
4	NULL	x
5	x	x
# This should show that "t1 left join t3" is still in the semi-join nest:
EXPLAIN EXTENDED
SELECT * FROM t1, t2 WHERE pk IN ( SELECT pk FROM t1 LEFT JOIN t3 ON (c1 = c3 ) ) ORDER BY c2, c1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	Using temporary; Using filesort
1	PRIMARY	t1	ALL	PRIMARY	NULL	NULL	NULL	5	100.00	Start temporary
1	PRIMARY	t1	eq_ref	PRIMARY	PRIMARY	4	test.t1.pk	1	100.00	Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; End temporary; Using join buffer (incremental, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`c1` AS `c1`,'x' AS `c2` from `test`.`t1` semi join (`test`.`t1` left join `test`.`t3` on(`test`.`t1`.`c1` = `test`.`t3`.`c3`)) where `test`.`t1`.`pk` = `test`.`t1`.`pk` order by 'x',`test`.`t1`.`c1`
DROP TABLE t1,t2,t3;
# 
# MDEV-5059: Wrong result (missing row) wih semijoin, join_cache_level > 2, LEFT JOIN, ORDER BY
# 
SET @tmp_mdev5059=@@join_cache_level;
SET join_cache_level = 3;
set @tmp_os_mdev5059= @@optimizer_switch;
set optimizer_switch=default;
CREATE TABLE t1 (pk1 INT PRIMARY KEY, i1 INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,4),(2,5);
CREATE TABLE t2 (i2 INT, c2 CHAR(1)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,'v'),(7,'s');
CREATE TABLE t3 (pk3 INT PRIMARY KEY, i3 INT, c3 CHAR(1), INDEX(i3), INDEX(c3,i3)) ENGINE=MyISAM;
INSERT INTO t3 VALUES (1,7,'g'),(2,4,'p'),(3,1,'q');
CREATE TABLE t4 (i4 INT) ENGINE=MyISAM;
INSERT INTO t4 VALUES (1);
SELECT * FROM t1, t2 LEFT JOIN t3 ON (c3 = c2) 
WHERE ( i2, pk1 )  IN ( SELECT i3, 1 FROM t3, t4 ) ORDER BY i1, c2;
pk1	i1	i2	c2	pk3	i3	c3
1	4	7	s	NULL	NULL	NULL
1	4	1	v	NULL	NULL	NULL
SET join_cache_level=@tmp_mdev5059;
set optimizer_switch=@tmp_os_mdev5059;
DROP TABLE t1,t2,t3,t4;
#
# MDEV-7911: crash in Item_cond::eval_not_null_tables
#
create table t1(a int);
insert into t1 values(1),(2),(3),(null);
explain
select 1 from t1 where _cp932 "1" in (select '1' from t1);
ERROR HY000: Illegal mix of collations (cp932_japanese_ci,COERCIBLE) and (latin1_swedish_ci,COERCIBLE) for operation '='
drop table t1;
#
# MDEV-7823: Server crashes in next_depth_first_tab on nested IN clauses with SQ inside
#
set @tmp_mdev7823=@@optimizer_switch;
set optimizer_switch=default;
CREATE TABLE t1 (f1 INT);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (f2 INT, KEY(f2));
INSERT INTO t2 VALUES (8),(0);
CREATE TABLE t3 (f3 INT);
INSERT INTO t3 VALUES (1),(2);
CREATE TABLE t4 (f4 INT);
INSERT INTO t4 VALUES (0),(5);
explain 
SELECT * FROM t1, t2, t3 WHERE f2 IN ( f1 IN ( SELECT f4 FROM t4 ) );
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	ref	f2	f2	5	const	0	Using where; Using index
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
2	DEPENDENT SUBQUERY	t4	ALL	NULL	NULL	NULL	NULL	2	Using where
SELECT * FROM t1, t2, t3 WHERE f2 IN ( f1 IN ( SELECT f4 FROM t4 ) );
f1	f2	f3
1	0	1
1	0	2
drop table t1,t2,t3,t4;
set optimizer_switch= @tmp_mdev7823;
#
# MDEV-6859: scalar subqueries in a comparison produced unexpected result
#
set @tmp_mdev6859=@@optimizer_switch;
set optimizer_switch=default;
CREATE TABLE t1 (
project_number varchar(50) NOT NULL,
PRIMARY KEY (project_number)
) ENGINE=MyISAM;
INSERT INTO t1 (project_number) VALUES ('aaa'),('bbb');
CREATE TABLE t2 (
id int(10) unsigned NOT NULL AUTO_INCREMENT,
project_number varchar(50) NOT NULL,
history_date date NOT NULL,
country varchar(50) NOT NULL,
PRIMARY KEY (id)
) ENGINE=MyISAM;
INSERT INTO t2 (id, project_number, history_date, country) VALUES
(1, 'aaa', '2014-08-09', 'france'),(2, 'aaa', '2014-09-09', 'singapore');
CREATE TABLE t3 (
region varchar(50) NOT NULL,
country varchar(50) NOT NULL
) ENGINE=MyISAM;
INSERT INTO t3 (region, country) VALUES ('apac', 'singapore'),('eame', 'france');
SELECT SQL_NO_CACHE a.project_number 
FROM t1 a 
WHERE ( SELECT z.country 
FROM t2 z 
WHERE z.project_number = a.project_number AND z.history_date <= '2014-09-01' 
ORDER BY z.id DESC LIMIT 1 
) IN ( 
SELECT r.country 
FROM t3 r 
WHERE r.region = 'eame'
      );
project_number
aaa
drop table t1, t2, t3;
set optimizer_switch= @tmp_mdev6859;
#
# MDEV-12675: subquery subject to semi-join optimizations  
#             in ON expression of INNER JOIN
#
set @tmp_mdev12675=@@optimizer_switch;
set optimizer_switch=default;
create table t1 (a int) engine=myisam;
insert into t1  values (5),(3),(2),(7),(2),(5),(1);
create table t2 (b int, index idx(b)) engine=myisam;
insert into t2 values (2),(3),(2),(1),(3),(4);
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
insert into t2 select b+10 from t2;
analyze table t1,t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
test.t2	analyze	status	OK
explain
select a from t1, t2 where b between 1 and 2 and a in (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	7	Using where
1	PRIMARY	t2	ref	idx	idx	5	test.t1.a	256	Using index; FirstMatch(t1)
1	PRIMARY	t2	range	idx	idx	5	NULL	2	Using where; Using index; Using join buffer (flat, BNL join)
explain 
select a from t1 join t2 on b between 1 and 2 and a in (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	7	Using where
1	PRIMARY	t2	ref	idx	idx	5	test.t1.a	256	Using index; FirstMatch(t1)
1	PRIMARY	t2	range	idx	idx	5	NULL	2	Using where; Using index; Using join buffer (flat, BNL join)
drop table t1,t2;
set optimizer_switch= @tmp_mdev12675;
#
# MDEV-12817: subquery NOT subject to semi-join optimizations  
#             in ON expression of INNER JOIN
#
CREATE TABLE t1 (c1 int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (c2 int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3),(4);
CREATE TABLE t3 (c3 int) ENGINE=MyISAM;
INSERT INTO t3 VALUES (5),(6);
CREATE TABLE t4 (c4 int) ENGINE=MyISAM;
INSERT INTO t4 VALUES (7),(8);
SELECT c1 
FROM t1 
LEFT JOIN
( t2 INNER JOIN t3 ON ( 1 IN ( SELECT c4 FROM t4 ) ) )
ON (c1 = c3);
c1
1
2
EXPLAIN EXTENDED SELECT c1 
FROM t1 
LEFT JOIN
( t2 INNER JOIN t3 ON ( 1 IN ( SELECT c4 FROM t4 ) ) )
ON (c1 = c3);
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	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (incremental, BNL join)
2	SUBQUERY	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`c1` AS `c1` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t3`.`c3` = `test`.`t1`.`c1` and <cache>(<in_optimizer>(1,<exists>(/* select#2 */ select `test`.`t4`.`c4` from `test`.`t4` where 1 = `test`.`t4`.`c4`)))) where 1
# mdev-12820
SELECT *
FROM t1
LEFT JOIN
( ( SELECT * FROM t2 WHERE c2 IN ( SELECT c3 FROM t3 ) ) AS sq INNER JOIN t4 )
ON (c1 = c2);
c1	c2	c4
1	NULL	NULL
2	NULL	NULL
EXPLAIN EXTENDED SELECT *
FROM t1
LEFT JOIN
( ( SELECT * FROM t2 WHERE c2 IN ( SELECT c3 FROM t3 ) ) AS sq INNER JOIN t4 )
ON (c1 = c2);
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	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using join buffer (incremental, BNL join)
3	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t4`.`c4` AS `c4` from `test`.`t1` left join (`test`.`t2` join `test`.`t4`) on(`test`.`t2`.`c2` = `test`.`t1`.`c1` and <in_optimizer>(`test`.`t1`.`c1`,<exists>(/* select#3 */ select `test`.`t3`.`c3` from `test`.`t3` where <cache>(`test`.`t2`.`c2`) = `test`.`t3`.`c3`))) where 1
DROP TABLE t1,t2,t3,t4;
#
# MDEV-13699: Assertion `!new_field->field_name.str ||
# strlen(new_field->field_name.str) == new_field->field_name.length'
# failed in create_tmp_table on 2nd execution of PS with semijoin
#
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);
CREATE ALGORITHM=MERGE VIEW v3 AS SELECT * FROM t3;
INSERT INTO t3 VALUES (5),(6);
PREPARE stmt FROM 
"SELECT * FROM t1
  WHERE EXISTS ( 
    SELECT * FROM t2 WHERE t1.a IN ( SELECT c AS fld FROM v3 )
  )";
EXECUTE stmt;
a
EXECUTE stmt;
a
EXECUTE stmt;
a
drop view v3;
drop table t1,t2,t3;
#
# MDEV-18896: IN subquery in WHERE of a table-less query used for INSERT
#
create table t1 (a1 varchar(25));
create table t2 (a2 varchar(25)) ;
insert into t1 select 'xxx' from dual where 'xxx' in (select a2 from t2);
drop table t1,t2;
# End of 5.5 test
set optimizer_switch=@subselect_sj_tmp;
#
# BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off
#
CREATE TABLE t0 (a INT);
INSERT INTO t0 VALUES (0),(1),(2),(3),(4);
CREATE TABLE t1 (a INT, b INT, KEY(a));
INSERT INTO t1 SELECT a, a from t0;
INSERT INTO t1 SELECT a+5, a from t0;
INSERT INTO t1 SELECT a+10, a from t0;
CREATE TABLE t2 (a INT, b INT, PRIMARY KEY(a));
INSERT INTO t2 SELECT * FROM t1;
UPDATE t1 SET a=3, b=11 WHERE a=4;
UPDATE t2 SET b=11 WHERE a=3;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='firstmatch=off';
The following should use a join order of t0,t1,t2, with DuplicateElimination:
explain
SELECT * FROM t0 WHERE t0.a IN 
(SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	5	Using where
1	PRIMARY	t1	ref	a	a	5	test.t0.a	1	Start temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1	PRIMARY	t2	eq_ref	PRIMARY	PRIMARY	4	test.t0.a	1	Using where; End temporary; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
SELECT * FROM t0 WHERE t0.a IN 
(SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);
a
0
1
2
3
set optimizer_switch=@save_optimizer_switch;
drop table t0, t1, t2;
#
# Bug #891995: IN subquery with join_cache_level >= 3
#
CREATE TABLE t1 (a varchar(1));
INSERT INTO t1 VALUES ('w'),('q');
CREATE TABLE t2 (a int NOT NULL, b time, PRIMARY KEY (a));
INSERT INTO t2 VALUES
(2,'18:56:33'), (5,'19:11:10'), (3,'18:56:33'), (7,'19:11:10');
CREATE TABLE t3 (
a int NOT NULL, b int, c int, d varchar(1), PRIMARY KEY (a), KEY (d,c)
);
INSERT INTO t3 VALUES
(25,158,10,'f'), (26,5,2,'v'), (27,163,103,'f'), (28,2,3,'q'), (29,8,6,'y');
set @save_optimizer_switch=@@optimizer_switch;
SET SESSION optimizer_switch='semijoin=on';
SET SESSION optimizer_switch='join_cache_hashed=on';
SET SESSION join_cache_level=3;
EXPLAIN
SELECT * FROM t1, t2
WHERE t2.a IN (SELECT b FROM t3 WHERE t3.d <= t1.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t2	ALL	PRIMARY	NULL	NULL	NULL	4	Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	d	NULL	NULL	NULL	5	Range checked for each record (index map: 0x2); FirstMatch(t2)
SELECT * FROM t1, t2
WHERE t2.a IN (SELECT b FROM t3 WHERE t3.d <= t1.a);
a	a	b
w	2	18:56:33
q	2	18:56:33
w	5	19:11:10
SET SESSION optimizer_switch='mrr=on';
SET SESSION join_cache_level=6;
EXPLAIN
SELECT * FROM t1, t2
WHERE t2.a IN (SELECT b FROM t3 WHERE t3.d <= t1.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t2	ALL	PRIMARY	NULL	NULL	NULL	4	Using join buffer (flat, BNL join)
1	PRIMARY	t3	ALL	d	NULL	NULL	NULL	5	Range checked for each record (index map: 0x2); FirstMatch(t2)
SELECT * FROM t1, t2
WHERE t2.a IN (SELECT b FROM t3 WHERE t3.d <= t1.a);
a	a	b
w	2	18:56:33
q	2	18:56:33
w	5	19:11:10
set optimizer_switch=@save_optimizer_switch;
set join_cache_level=default;
DROP TABLE t1,t2,t3;
#
# BUG#912513: Wrong result (missing rows) with join_cache_hashed+materialization+semijoin=on
#
set @os_912513= @@optimizer_switch;
set @jcl_912513= @@join_cache_level;
SET optimizer_switch = 'semijoin=on,materialization=on,join_cache_hashed=on';
SET join_cache_level = 3;
CREATE TABLE t1 ( a INT, b INT, KEY(a) );
INSERT INTO t1 VALUES
(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7);
CREATE TABLE t2 ( c INT );
INSERT INTO t2 VALUES (1),(2),(3),(4),(5),(6),(7);
SELECT alias1.* FROM
t1 AS alias1 INNER JOIN t1 AS alias2
ON alias2.a = alias1.b
WHERE alias1.b IN (
SELECT a FROM t1, t2
);
a	b
1	1
2	2
3	3
4	4
5	5
6	6
7	7
DROP table t1, t2;
set @@optimizer_switch= @os_912513;
set @@join_cache_level= @jcl_912513;
# End
#
# BUG#934342: outer join + semijoin materialization 
#             + join_cache_level > 2
#
CREATE TABLE t1 (a varchar(1), b varchar(1), INDEX idx_a(a) );
INSERT INTO t1 VALUES ('v','v'), ('w','w'), ('t','t');
CREATE TABLE t2 (c varchar(1), INDEX idx_c(c) );
INSERT INTO t2 VALUES ('v'), ('v'), ('s'), ('j');
CREATE TABLE t3 (c varchar(1), d varchar(1), INDEX idx_c(c) );
INSERT INTO t3 VALUES ('v','v'), ('v','v'), ('s','s'), ('j','j');
INSERT INTO t3 VALUES ('m','m'), ('d','d'), ('k','k'), ('m','m');
set @tmp_otimizer_switch= @@optimizer_switch;
set @tmp_join_cache_level=@@join_cache_level;
set optimizer_switch = 'materialization=on,semijoin=on,join_cache_hashed=on';
set join_cache_level=0;
EXPLAIN
SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	idx_a	NULL	NULL	NULL	3	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	
1	PRIMARY	t2	ref	idx_c	idx_c	4	test.t1.b	2	Using where; Using index
2	MATERIALIZED	t	ALL	idx_a	NULL	NULL	NULL	3	
SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
a	b	c
v	v	v
v	v	v
w	w	NULL
t	t	NULL
EXPLAIN
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	idx_a	NULL	NULL	NULL	3	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	
1	PRIMARY	t3	ref	idx_c	idx_c	4	test.t1.b	2	Using where
2	MATERIALIZED	t	ALL	idx_a	NULL	NULL	NULL	3	
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
a	b	c	d
v	v	v	v
v	v	v	v
w	w	NULL	NULL
t	t	NULL	NULL
set join_cache_level=6;
EXPLAIN
SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	idx_a	NULL	NULL	NULL	3	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	
1	PRIMARY	t2	ref	idx_c	idx_c	4	test.t1.b	2	Using where; Using index
2	MATERIALIZED	t	ALL	idx_a	NULL	NULL	NULL	3	
SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
a	b	c
v	v	v
v	v	v
w	w	NULL
t	t	NULL
EXPLAIN
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	idx_a	NULL	NULL	NULL	3	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func,func	1	
1	PRIMARY	t3	ref	idx_c	idx_c	4	test.t1.b	2	Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
2	MATERIALIZED	t	ALL	idx_a	NULL	NULL	NULL	3	
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
WHERE (a, b) IN (SELECT a, b FROM t1 t);
a	b	c	d
v	v	v	v
v	v	v	v
w	w	NULL	NULL
t	t	NULL	NULL
set optimizer_switch=@tmp_optimizer_switch;
set join_cache_level=@tmp_join_cache_level;
DROP TABLE t1,t2,t3;
# End
#
# BUG#934348: GROUP BY with HAVING + semijoin materialization 
#             + join_cache_level > 2
#
CREATE TABLE t1 (a varchar(1), INDEX idx_a(a));
INSERT INTO t1 VALUES ('c'), ('v'), ('c');
CREATE TABLE t2 (b varchar(1));
INSERT INTO t2 VALUES ('v'), ('c');
set @tmp_otimizer_switch= @@optimizer_switch;
set @tmp_join_cache_level=@@join_cache_level;
set optimizer_switch = 'materialization=on,semijoin=on,join_cache_hashed=on';
set join_cache_level=0;
EXPLAIN
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
GROUP BY a HAVING a != 'z';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	index	idx_a	idx_a	4	NULL	3	Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
2	MATERIALIZED	t1	ref	idx_a	idx_a	4	test.t2.b	2	Using index
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
GROUP BY a HAVING a != 'z';
a
c
v
set join_cache_level=6;
EXPLAIN
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
GROUP BY a HAVING a != 'z';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	index	idx_a	idx_a	4	NULL	3	Using index
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
2	MATERIALIZED	t1	ref	idx_a	idx_a	4	test.t2.b	2	Using index
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
GROUP BY a HAVING a != 'z';
a
c
v
set optimizer_switch=@tmp_optimizer_switch;
set join_cache_level=@tmp_join_cache_level;
DROP TABLE t1,t2;
# End
set join_cache_level=default;
show variables like 'join_cache_level';
Variable_name	Value
join_cache_level	2
set @@optimizer_switch=@save_optimizer_switch_jcl6;
set @optimizer_switch_for_subselect_sj_test=NULL;
set @join_cache_level_subselect_sj_test=NULL;