drop table if exists t1,t2,t3;
select * from (select 2 from DUAL) b;
2
2
SELECT 1 as a FROM (SELECT 1 UNION SELECT a) b;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT a UNION SELECT 1) b;
ERROR 42S22: Unknown column 'a' in 'field list'
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
select t1.a,t3.y from t1,(select a as y from t2  where b='c') as t3  where t1.a = t3.y;
a	y
3	3
3	3
select t1.a,t3.a from t1,(select * from t2  where b='c') as t3  where t1.a = t3.a;
a	a
3	3
3	3
CREATE TABLE t3 (a int not null, b char (10) not null);
insert into t3 values (3,'f'),(4,'y'),(5,'z'),(6,'c');
select t1.a,t4.y from t1,(select t2.a as y from t2,(select t3.b from t3 where t3.a>3) as t5  where t2.b=t5.b) as t4  where t1.a = t4.y;
a	y
3	3
3	3
SELECT a FROM (SELECT 1 FROM (SELECT 1) a HAVING a=1) b;
ERROR 42S22: Unknown column 'a' in 'having clause'
SELECT a,b as a FROM (SELECT '1' as a,'2' as b) b  HAVING a=1;
ERROR 23000: Column 'a' in having clause is ambiguous
SELECT a,2 as a FROM (SELECT '1' as a) b HAVING a=2;
a	a
1	2
SELECT a,2 as a FROM (SELECT '1' as a) b HAVING a=1;
a	a
SELECT 1 FROM (SELECT 1) a WHERE a=2;
ERROR 42S22: Unknown column 'a' in 'where clause'
SELECT (SELECT 1) as a FROM (SELECT 1 FROM t1  HAVING a=1) as a;
ERROR 42S22: Unknown column 'a' in 'having clause'
select * from t1 as x1, (select * from t1) as x2;
a	b	a	b
1	a	1	a
1	a	2	b
1	a	3	c
1	a	3	c
2	b	1	a
2	b	2	b
2	b	3	c
2	b	3	c
3	c	1	a
3	c	1	a
3	c	2	b
3	c	2	b
3	c	3	c
3	c	3	c
3	c	3	c
3	c	3	c
explain select * from t1 as x1, (select * from t1) as x2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	x1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`x1`.`a` AS `a`,`test`.`x1`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` `x1` join `test`.`t1`
drop table if exists  t2,t3;
select * from (select 1) as a;
1
1
select a from (select 1 as a) as b;
a
1
select 1 from (select 1) as a;
1
1
select * from (select * from t1 union select * from t1) a;
a	b
1	a
2	b
3	c
select * from (select * from t1 union all select * from t1) a;
a	b
1	a
2	b
3	c
3	c
1	a
2	b
3	c
3	c
select * from (select * from t1 union all select * from t1 limit 2) a;
a	b
1	a
2	b
explain select * from (select * from t1 union select * from t1) a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	8	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
3	UNION	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
NULL	UNION RESULT	<union2,3>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using temporary
Warnings:
Note	1003	/* select#1 */ select `a`.`a` AS `a`,`a`.`b` AS `b` from (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union /* select#3 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) `a`
explain select * from (select * from t1 union all select * from t1) a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	8	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
3	UNION	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `a`.`a` AS `a`,`a`.`b` AS `b` from (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union all /* select#3 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) `a`
CREATE TABLE t2 (a int not null);
insert into t2 values(1);
select * from (select * from t1 where t1.a=(select a from t2 where t2.a=t1.a)) a;
a	b
1	a
select * from (select * from t1 where t1.a=(select t2.a from t2 where t2.a=t1.a) union select t1.a, t1.b from t1) a;
a	b
1	a
2	b
3	c
explain select * from (select t1.*, t2.a as t2a from t1,t2 where t1.a=t2.a) t1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'1' AS `t2a` from `test`.`t1` where (`test`.`t1`.`a` = '1')
drop table t1, t2;
create table t1(a int not null, t char(8), index(a));
SELECT * FROM (SELECT * FROM t1) as b ORDER BY a  ASC LIMIT 0,20;
a	t
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
explain select count(*) from t1 as tt1, (select * from t1) as tt2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	/* select#1 */ select count(0) AS `count(*)` from `test`.`t1` `tt1` join `test`.`t1`
drop table t1;
SELECT * FROM (SELECT (SELECT * FROM (SELECT 1 as a) as a )) as b;
(SELECT * FROM (SELECT 1 as a) as a )
1
select * from (select 1 as a) b  left join (select 2 as a) c using(a);
a
1
SELECT * FROM (SELECT 1 UNION SELECT a) b;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT a UNION SELECT 1) b;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT 1 UNION SELECT a) b;
ERROR 42S22: Unknown column 'a' in 'field list'
select 1 from  (select 2) a order by 0;
ERROR 42S22: Unknown column '0' in 'order clause'
create table t1 (id int);
insert into t1 values (1),(2),(3);
describe select * from (select * from t1 group by id) bar;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `bar`.`id` AS `id` from (/* select#2 */ select `test`.`t1`.`id` AS `id` from `test`.`t1` group by `test`.`t1`.`id`) `bar`
drop table t1;
create table t1 (mat_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, matintnum CHAR(6) NOT NULL, test MEDIUMINT UNSIGNED NULL) charset utf8mb4;
create table t2 (mat_id MEDIUMINT UNSIGNED NOT NULL, pla_id MEDIUMINT UNSIGNED NOT NULL);
insert into t1 values (NULL, 'a', 1), (NULL, 'b', 2), (NULL, 'c', 3), (NULL, 'd', 4), (NULL, 'e', 5), (NULL, 'f', 6), (NULL, 'g', 7), (NULL, 'h', 8), (NULL, 'i', 9);
insert into t2 values (1, 100), (1, 101), (1, 102), (2, 100), (2, 103), (2, 104), (3, 101), (3, 102), (3, 105);
analyze table t1, t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
test.t2	analyze	status	OK
SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
pla_id	mat_id
100	1
101	1
102	1
103	2
104	2
105	3
SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2  INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
pla_id	test
100	1
101	1
102	1
103	2
104	2
105	3
explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	m2	NULL	ALL	NULL	NULL	NULL	NULL	9	100.00	NULL
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	25	test.m2.matintnum	2	100.00	NULL
2	DERIVED	mp	NULL	ALL	NULL	NULL	NULL	NULL	9	100.00	Using temporary
2	DERIVED	m1	NULL	eq_ref	PRIMARY	PRIMARY	3	test.mp.mat_id	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select straight_join `d`.`pla_id` AS `pla_id`,`test`.`m2`.`mat_id` AS `mat_id` from `test`.`t1` `m2` join (/* select#2 */ select `test`.`mp`.`pla_id` AS `pla_id`,min(`test`.`m1`.`matintnum`) AS `matintnum` from `test`.`t2` `mp` join `test`.`t1` `m1` where (`test`.`m1`.`mat_id` = `test`.`mp`.`mat_id`) group by `test`.`mp`.`pla_id`) `d` where (`d`.`matintnum` = `test`.`m2`.`matintnum`)
explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2  INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	m2	NULL	ALL	NULL	NULL	NULL	NULL	9	100.00	NULL
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	25	test.m2.matintnum	2	100.00	NULL
2	DERIVED	mp	NULL	ALL	NULL	NULL	NULL	NULL	9	100.00	Using temporary
2	DERIVED	m1	NULL	eq_ref	PRIMARY	PRIMARY	3	test.mp.mat_id	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select straight_join `d`.`pla_id` AS `pla_id`,`test`.`m2`.`test` AS `test` from `test`.`t1` `m2` join (/* select#2 */ select `test`.`mp`.`pla_id` AS `pla_id`,min(`test`.`m1`.`matintnum`) AS `matintnum` from `test`.`t2` `mp` join `test`.`t1` `m1` where (`test`.`m1`.`mat_id` = `test`.`mp`.`mat_id`) group by `test`.`mp`.`pla_id`) `d` where (`d`.`matintnum` = `test`.`m2`.`matintnum`)
drop table t1,t2;
SELECT a.x FROM (SELECT 1 AS x) AS a HAVING a.x = 1;
x
1
create user mysqltest_1;
create table t1 select 1 as a;
select 2 as a from (select * from t1) b;
ERROR 3D000: No database selected
use test;
select 2 as a from (select * from t1) b;
a
2
drop table t1;
select mail_id,  if(folder.f_description!='', folder.f_description, folder.f_name) as folder_name,  date, address_id, phrase, address,  subject from folder, (select  mail.mail_id as mail_id,  date_format(mail.h_date, '%b %e, %Y %h:%i') as date,  mail.folder_id,  sender.address_id as address_id,  sender.phrase as phrase, sender.address as address,    mail.h_subject as subject from    mail left join mxa as mxa_sender on mail.mail_id=mxa_sender.mail_id and mxa_sender.type='from' left join address as sender on mxa_sender.address_id=sender.address_id  mxa as mxa_recipient,   address as recipient, where 1     and mail.mail_id=mxa_recipient.mail_id   and mxa_recipient.address_id=recipient.address_id   and mxa_recipient.type='to'  and  match(sender.phrase, sender.address, sender.comment) against ('jeremy' in boolean mode)   and  match(recipient.phrase, recipient.address, recipient.comment) against ('monty' in boolean mode) order by mail.h_date desc limit 0, 25 ) as query where query.folder_id=folder.folder_id;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'mxa as mxa_recipient,   address as recipient, where 1     and mail.mail_id=mxa_r' at line 1
create table t1 (a int);
insert into t1 values (1),(2),(3);
update (select * from t1) as t1 set a = 5;
ERROR HY000: The target table t1 of the UPDATE is not updatable
update (select * from t1) as t1, t1 as t2 set t1.a = 5;
ERROR HY000: The target table t1 of the UPDATE is not updatable
delete from (select * from t1);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(select * from t1)' at line 1
delete from (select * from t1) as t1, t1 as t2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(select * from t1) as t1, t1 as t2' at line 1
insert into  (select * from t1) values (5);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(select * from t1) values (5)' at line 1
drop table t1;
create table t1 (E1 INTEGER UNSIGNED NOT NULL, E2 INTEGER UNSIGNED NOT NULL, E3 INTEGER UNSIGNED NOT NULL, PRIMARY KEY(E1)
);
insert into t1 VALUES(1,1,1), (2,2,1);
select count(*) from t1 INNER JOIN (SELECT A.E1, A.E2, A.E3 FROM t1 AS A WHERE A.E3 = (SELECT MAX(B.E3) FROM t1 AS B WHERE A.E2 = B.E2)) AS themax ON t1.E1 = themax.E2 AND t1.E1 = t1.E2;
count(*)
2
explain select count(*) from t1 INNER JOIN (SELECT a.E1, a.E2, a.E3 FROM t1 AS a WHERE a.E3 = (SELECT max(b.E3) FROM t1 AS b WHERE a.E2 = b.E2)) AS themax ON t1.E1 = themax.E2 AND t1.E1 = t1.E2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	a	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	t1	NULL	eq_ref	PRIMARY	PRIMARY	4	test.a.E2	1	50.00	Using where
3	DEPENDENT SUBQUERY	b	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
Warnings:
Note	1276	Field or reference 'test.a.E2' of SELECT #3 was resolved in SELECT #2
Note	1003	/* select#1 */ select count(0) AS `count(*)` from `test`.`t1` join `test`.`t1` `a` where ((`test`.`t1`.`E1` = `test`.`a`.`E2`) and (`test`.`t1`.`E2` = `test`.`a`.`E2`) and (`test`.`a`.`E3` = (/* select#3 */ select max(`test`.`b`.`E3`) from `test`.`t1` `b` where (`test`.`a`.`E2` = `test`.`b`.`E2`))))
drop table t1;
create table t1 (a int);
insert into t1 values (1),(2);
select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
a	a
1	1
1	2
2	1
2	2
explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
1	PRIMARY	<derived4>	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using join buffer (Block Nested Loop)
4	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
5	UNION	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
NULL	UNION RESULT	<union4,5>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using temporary
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
3	UNION	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
NULL	UNION RESULT	<union2,3>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using temporary
Warnings:
Note	1003	/* select#1 */ select `a`.`a` AS `a`,`b`.`a` AS `a` from (/* select#2 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` union /* select#3 */ select `test`.`t1`.`a` AS `a` from `test`.`t1`) `a` join (/* select#4 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` union /* select#5 */ select `test`.`t1`.`a` AS `a` from `test`.`t1`) `b`
drop table t1;
CREATE TABLE `t1` (
`N` int(11) unsigned NOT NULL default '0',
`M` tinyint(1) default '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO `t1` (N, M) VALUES (1, 0),(1, 0),(1, 0),(2, 0),(2, 0),(3, 0);
UPDATE `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2;
select * from t1;
N	M
1	2
1	2
1	2
2	2
2	2
3	0
UPDATE `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2, P2.N = 2;
ERROR HY000: The target table P2 of the UPDATE is not updatable
UPDATE `t1` AS P1 INNER JOIN (SELECT aaaa FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2;
ERROR 42S22: Unknown column 'aaaa' in 'field list'
delete P1.* from `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N;
select * from t1;
N	M
3	0
delete P1.*,p2.* from `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS p2 ON P1.N = p2.N;
ERROR HY000: The target table p2 of the DELETE is not updatable
delete P1.* from `t1` AS P1 INNER JOIN (SELECT aaa FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N;
ERROR 42S22: Unknown column 'aaa' in 'field list'
drop table t1;
CREATE TABLE t1 (
OBJECTID int(11) NOT NULL default '0',
SORTORDER int(11) NOT NULL auto_increment,
KEY t1_SortIndex (SORTORDER),
KEY t1_IdIndex (OBJECTID)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
CREATE TABLE t2 (
ID int(11) default NULL,
PARID int(11) default NULL,
UNIQUE KEY t2_ID_IDX (ID),
KEY t2_PARID_IDX (PARID)
) engine=MyISAM DEFAULT CHARSET=latin1;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (1000,0),(1001,0),(1002,0),(1003,0),(1008,1),(1009,1),(1010,1),(1011,1),(1016,2);
CREATE TABLE t3 (
ID int(11) default NULL,
DATA decimal(10,2) default NULL,
UNIQUE KEY t3_ID_IDX (ID)
) engine=MyISAM DEFAULT CHARSET=latin1;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t3 VALUES (1000,0.00),(1001,0.25),(1002,0.50),(1003,0.75),(1008,1.00),(1009,1.25),(1010,1.50),(1011,1.75);
select 497, TMP.ID, NULL from (select 497 as ID, MAX(t3.DATA) as DATA      from t1 join t2 on (t1.ObjectID = t2.ID) join t3 on (t1.ObjectID = t3.ID) group by t2.ParID order by DATA DESC) as TMP;
497	ID	NULL
drop table t1, t2, t3;
CREATE TABLE t1 (name char(1) default NULL, val int(5) default NULL);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES ('a',1),  ('a',2),  ('a',2),  ('a',2),  ('a',3),  ('a',6), ('a',7), ('a',11), ('a',11), ('a',12), ('a',13), ('a',13), ('a',20), ('b',2), ('b',3), ('b',4), ('b',5);
SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x, t1 y WHERE x.name=y.name GROUP BY x.name, x.val HAVING SUM(y.val <= x.val) >= COUNT(*)/2 AND SUM(y.val >= x.val) >= COUNT(*)/2) AS s GROUP BY s.name;
name	median
a	7.0000
b	3.5000
explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x, t1 y WHERE x.name=y.name GROUP BY x.name, x.val HAVING SUM(y.val <= x.val) >= COUNT(*)/2 AND SUM(y.val >= x.val) >= COUNT(*)/2) AS s GROUP BY s.name;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	28	100.00	Using temporary
2	DERIVED	x	NULL	ALL	NULL	NULL	NULL	NULL	17	100.00	Using temporary
2	DERIVED	y	NULL	ALL	NULL	NULL	NULL	NULL	17	10.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `s`.`name` AS `name`,avg(`s`.`val`) AS `median` from (/* select#2 */ select `test`.`x`.`name` AS `name`,`test`.`x`.`val` AS `val` from `test`.`t1` `x` join `test`.`t1` `y` where (`test`.`y`.`name` = `test`.`x`.`name`) group by `test`.`x`.`name`,`test`.`x`.`val` having ((sum((`test`.`y`.`val` <= `test`.`x`.`val`)) >= (count(0) / 2)) and (sum((`test`.`y`.`val` >= `test`.`x`.`val`)) >= (count(0) / 2)))) `s` group by `s`.`name`
drop table t1;
create table t2 (a int, b int, primary key (a));
insert into t2 values (1,7),(2,7);
explain select a from t2 where a>1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	index	PRIMARY	PRIMARY	4	NULL	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where (`test`.`t2`.`a` > 1)
explain select a from (select a from t2 where a>1) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	index	PRIMARY	PRIMARY	4	NULL	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where (`test`.`t2`.`a` > 1)
drop table t2;
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
CREATE TABLE `t1` ( `itemid` int(11) NOT NULL default '0', `grpid` varchar(15) NOT NULL default '', `vendor` int(11) NOT NULL default '0', `date_` date NOT NULL default '0000-00-00', `price` decimal(12,2) NOT NULL default '0.00', PRIMARY KEY  (`itemid`,`grpid`,`vendor`,`date_`), KEY `itemid` (`itemid`,`vendor`), KEY `itemid_2` (`itemid`,`date_`));
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
insert into t1 values (128, 'rozn', 2, curdate(), 10),
(128, 'rozn', 1, curdate(), 10);
SELECT MIN(price) min, MAX(price) max, AVG(price) avg FROM (SELECT SUBSTRING( MAX(concat(date_,";",price)), 12) price FROM t1 WHERE itemid=128 AND  grpid='rozn' GROUP BY itemid, grpid, vendor) lastprices;
min	max	avg
10.00	10.00	10
DROP TABLE t1;
SET sql_mode = default;
create table t1 (a integer, b integer);
insert into t1 values (1,4), (2,2),(2,2), (4,1),(4,1),(4,1),(4,1);
select distinct sum(b) from t1 group by a;
sum(b)
4
select distinct sum(b) from (select a,b from t1) y group by a;
sum(b)
4
drop table t1;
CREATE TABLE t1 (a char(10), b char(10));
INSERT INTO t1 VALUES ('root','localhost'), ('root','%');
SELECT * FROM (SELECT (SELECT a.a FROM t1 AS a WHERE a.a = b.a) FROM t1 AS b) AS c;
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1;
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(2),(2);
insert into t3 values(3),(3);
select * from t1 union distinct select * from t2 union all select * from t3;
a
1
2
3
3
select * from (select * from t1 union distinct select * from t2 union all select * from t3) X;
a
1
2
3
3
drop table t1, t2, t3;
create table t1 (a int);
create table t2 (a int);
select * from (select * from t1,t2) foo;
ERROR 42S21: Duplicate column name 'a'
drop table t1,t2;
create table t1 (ID int unsigned not null auto_increment,
DATA varchar(5) not null, primary key (ID));
create table t2 (ID int unsigned not null auto_increment,
DATA varchar(5) not null, FID int unsigned not null,
primary key (ID));
select A.* from (t1 inner join (select * from t2) as A on t1.ID = A.FID);
ID	DATA	FID
select t2.* from ((select * from t1) as A inner join t2 on A.ID = t2.FID);
ID	DATA	FID
select t2.* from (select * from t1) as A inner join t2 on A.ID = t2.FID;
ID	DATA	FID
drop table t1, t2;
drop user mysqltest_1;
# End of 4.1 tests
SELECT 0 FROM
(SELECT 0) t01, (SELECT 0) t02, (SELECT 0) t03, (SELECT 0) t04, (SELECT 0) t05,
(SELECT 0) t06, (SELECT 0) t07, (SELECT 0) t08, (SELECT 0) t09, (SELECT 0) t10,
(SELECT 0) t11, (SELECT 0) t12, (SELECT 0) t13, (SELECT 0) t14, (SELECT 0) t15,
(SELECT 0) t16, (SELECT 0) t17, (SELECT 0) t18, (SELECT 0) t19, (SELECT 0) t20,
(SELECT 0) t21, (SELECT 0) t22, (SELECT 0) t23, (SELECT 0) t24, (SELECT 0) t25,
(SELECT 0) t26, (SELECT 0) t27, (SELECT 0) t28, (SELECT 0) t29, (SELECT 0) t30,
(SELECT 0) t31, (SELECT 0) t32, (SELECT 0) t33, (SELECT 0) t34, (SELECT 0) t35,
(SELECT 0) t36, (SELECT 0) t37, (SELECT 0) t38, (SELECT 0) t39, (SELECT 0) t40,
(SELECT 0) t41, (SELECT 0) t42, (SELECT 0) t43, (SELECT 0) t44, (SELECT 0) t45,
(SELECT 0) t46, (SELECT 0) t47, (SELECT 0) t48, (SELECT 0) t49, (SELECT 0) t50,
(SELECT 0) t51, (SELECT 0) t52, (SELECT 0) t53, (SELECT 0) t54, (SELECT 0) t55,
(SELECT 0) t56, (SELECT 0) t57, (SELECT 0) t58, (SELECT 0) t59, (SELECT 0) t60,
(SELECT 0) t61;
0
0
#
#  A nested materialized derived table is used before being populated.
#  (addon for bug#19077)
#
CREATE TABLE t1 (i INT, j BIGINT);
INSERT INTO t1 VALUES (1, 2), (2, 2), (3, 2);
SELECT * FROM (SELECT MIN(i) FROM t1
WHERE j = SUBSTRING('12', (SELECT * FROM (SELECT MIN(j) FROM t1) t2))) t3;
MIN(i)
1
DROP TABLE t1;
# End of 5.0 tests
#
# Bug#55586: Crash JOIN of two subqueries in FROM + ORDER BY and GROUP BY
#
CREATE TABLE C (
`col_int_key` int(11) DEFAULT NULL,
`col_varchar_key` varchar(1) DEFAULT NULL,
`col_varchar_nokey` varchar(1) DEFAULT NULL,
KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`)
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO C VALUES (2,'w','w');
INSERT INTO C VALUES (2,'d','d');
SELECT SUM(DISTINCT table2.col_int_key) field1, 
table1.col_varchar_key field2 
FROM 
(SELECT * FROM C  ) table1
JOIN (SELECT * FROM C  ) table2
ON table2 .`col_varchar_key` = table1 .`col_varchar_nokey` 
GROUP  BY field2
ORDER  BY field1;
field1	field2
2	d
2	w
DROP TABLE C;
# End of test for bug#55586
#
# Bug#55561: Crash on JOIN with 2 FROM subqueries
#
CREATE TABLE C (
col_int int DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL
);
INSERT INTO `C` VALUES (0,NULL);
INSERT INTO `C` VALUES (5,'y');
SELECT table1.col_varchar
FROM 
( SELECT * FROM C  ) table1  
JOIN ( SELECT * FROM C  ) table2  ON table2.col_varchar = table1.col_varchar
WHERE 
table2.col_varchar < table2.col_varchar
AND table1.col_varchar != 'k' 
LIMIT  1;
col_varchar
DROP TABLE C;
# End on bug#55561
#
# Bug#56233: Hang during key generation for derived tables
#
CREATE TABLE C (
col_varchar_10_key varchar(10) DEFAULT NULL,
col_int_key int DEFAULT NULL,
pk int NOT NULL AUTO_INCREMENT,
col_date_key date DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `col_varchar_10_key` (`col_varchar_10_key`),
KEY `col_int_key` (`col_int_key`),
KEY `col_date_key` (`col_date_key`)
);
INSERT INTO C VALUES ('ok',3,1,'2003-04-02');
CREATE ALGORITHM=TEMPTABLE VIEW viewC AS SELECT * FROM C;
SELECT  table1.col_date_key AS field1 
FROM
C AS table1
WHERE 
(table1.col_int_key <=ANY 
( SELECT SUBQUERY1_t1.col_int_key 
FROM viewC AS SUBQUERY1_t1 
WHERE SUBQUERY1_t1.col_varchar_10_key <= table1.col_varchar_10_key 
) 
)
;
field1
2003-04-02
DROP TABLE C;
DROP VIEW viewC;
#
#
# Bug#55950: FROM Subquery joined by 2 varchar fields returns empty
#            set
#
CREATE TABLE `cc` (
`i1` varchar(1) DEFAULT NULL,
`i2` varchar(1) DEFAULT NULL
) charset utf8mb4;
INSERT INTO `cc` VALUES ('m','m');
INSERT INTO `cc` VALUES ('c','c');
CREATE TABLE `C` (
`o1` varchar(1) DEFAULT NULL
) charset utf8mb4;
INSERT INTO `C` VALUES ('m');
SELECT table1 . o1 
FROM C table1  
JOIN ( C table2  
JOIN ( SELECT * FROM cc ) table3  
ON table3 .`i1`  = table2 .o1  
) ON table3 .`i2`  = table2 .o1   
;
o1
m
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
# Ref access to the derived table should be used.
EXPLAIN SELECT table1 . o1
FROM C table1
JOIN ( C table2
JOIN ( SELECT * FROM cc ) table3
ON table3 .`i1`  = table2 .o1
) ON table3 .`i2`  = table2 .o1
;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	table1	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	table2	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	14	const,const	1	100.00	Using index
2	DERIVED	cc	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select 'm' AS `o1` from (/* select#2 */ select `test`.`cc`.`i1` AS `i1`,`test`.`cc`.`i2` AS `i2` from `test`.`cc`) `table3` where ((`table3`.`i2` = 'm') and (`table3`.`i1` = 'm'))
EXPLAIN FORMAT=tree SELECT table1 . o1
FROM C table1
JOIN ( C table2
JOIN ( SELECT * FROM cc ) table3
ON table3 .`i1`  = table2 .o1
) ON table3 .`i2`  = table2 .o1
;
EXPLAIN
-> Index lookup on table3 using <auto_key0> (i1='m', i2='m')
    -> Materialize
        -> Table scan on cc  (cost=0.70 rows=2)

SET @@optimizer_switch=@optimizer_switch_saved;
DROP TABLE cc;
DROP TABLE C;
# End of test for bug#55950
#
# Bug#56592: Subquery with DISTINCT in FROM clause returns only partial
# result
#
CREATE TABLE `t1` (
`pk` int(11) NOT NULL,
`col_int_key` int(11) DEFAULT NULL,
`col_datetime_key` datetime DEFAULT NULL
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (2, 9, NULL), (3, 3, '1900-01-01 00:00:00'),
(8, 8, '1900-01-01 00:00:00'), (15, 0, '2007-12-15 12:39:34');
SELECT * FROM ( 
SELECT DISTINCT tableb.col_datetime_key 
FROM t1 tablea LEFT JOIN t1 tableb ON tablea.pk < tableb.col_int_key
) AS from_subquery;
col_datetime_key
NULL
1900-01-01 00:00:00
EXPLAIN SELECT * FROM ( 
SELECT DISTINCT tableb.col_datetime_key 
FROM t1 tablea LEFT JOIN t1 tableb ON tablea.pk < tableb.col_int_key
) AS from_subquery;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	16	100.00	NULL
2	DERIVED	tablea	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using temporary
2	DERIVED	tableb	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `from_subquery`.`col_datetime_key` AS `col_datetime_key` from (/* select#2 */ select distinct `test`.`tableb`.`col_datetime_key` AS `col_datetime_key` from `test`.`t1` `tablea` left join `test`.`t1` `tableb` on((`test`.`tablea`.`pk` < `test`.`tableb`.`col_int_key`)) where true) `from_subquery`
EXPLAIN SELECT * FROM ( 
SELECT DISTINCT tablea.col_datetime_key 
FROM t1 tablea LEFT JOIN t1 tableb ON tablea.pk < tableb.col_int_key
) AS from_subquery;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	16	100.00	NULL
2	DERIVED	tablea	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using temporary
2	DERIVED	tableb	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Distinct; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `from_subquery`.`col_datetime_key` AS `col_datetime_key` from (/* select#2 */ select distinct `test`.`tablea`.`col_datetime_key` AS `col_datetime_key` from `test`.`t1` `tablea` left join `test`.`t1` `tableb` on((`test`.`tablea`.`pk` < `test`.`tableb`.`col_int_key`)) where true) `from_subquery`
DROP TABLE t1;
#
# Bug#58730 Assertion failed: table->key_read == 0 in close_thread_table,
#           temptable views
#
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (b INT, KEY (b));
INSERT INTO t1 VALUES (1),(1);
INSERT INTO t2 VALUES (1),(1);
CREATE algorithm=temptable VIEW v1 AS
SELECT 1 FROM t1 LEFT JOIN t1 t3 ON 1 > (SELECT 1 FROM t1);
CREATE algorithm=temptable VIEW v2 AS SELECT 1 FROM t2;
EXPLAIN SELECT 1 FROM t1 JOIN v1 ON 1 > (SELECT 1 FROM v2);
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1, t2;
DROP VIEW v1, v2;
#
# WL#5274: Postpone materialization of views/subqueries in FROM clause.
#          Additional tests.
#
CREATE TABLE t1(f1 int, f11 int);
CREATE TABLE t2(f2 int, f22 int);
INSERT INTO t1 VALUES(1,1),(2,2),(3,3),(5,5),(9,9),(7,7);
INSERT INTO t2 VALUES(1,1),(3,3),(2,2),(4,4),(8,8),(6,6);
for merged derived tables
explain for simple derived
EXPLAIN SELECT * FROM (SELECT * FROM t1) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1`
SELECT * FROM (SELECT * FROM t1) tt;
f1	f11
1	1
2	2
3	3
5	5
9	9
7	7
explain for multitable derived
EXPLAIN SELECT * FROM (SELECT * FROM t1 JOIN t2 ON f1=f2) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`f2` = `test`.`t1`.`f1`)
SELECT * FROM (SELECT * FROM t1 JOIN t2 ON f1=f2) tt;
f1	f11	f2	f22
1	1	1	1
2	2	2	2
3	3	3	3
explain for derived with where
FLUSH STATUS;
EXPLAIN 
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt WHERE f11=2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f11` = 2) and (`test`.`t1`.`f1` in (2,3)))
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	0
FLUSH STATUS;
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt WHERE f11=2;
f1	f11
2	2
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	7
join of derived
EXPLAIN 
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt JOIN
(SELECT * FROM t1 WHERE f1 IN (1,2)) aa ON tt.f1=aa.f1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` join `test`.`t1` where ((`test`.`t1`.`f1` = `test`.`t1`.`f1`) and (`test`.`t1`.`f1` in (1,2)) and (`test`.`t1`.`f1` in (2,3)))
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt JOIN
(SELECT * FROM t1 WHERE f1 IN (1,2)) aa ON tt.f1=aa.f1;
f1	f11	f1	f11
2	2	2	2
for merged views
CREATE VIEW v1 AS SELECT * FROM t1;
CREATE VIEW v2 AS SELECT * FROM t1 JOIN t2 ON f1=f2;
CREATE VIEW v3 AS SELECT * FROM t1 WHERE f1 IN (2,3);
CREATE VIEW v4 AS SELECT * FROM t2 WHERE f2 IN (2,3);
explain for simple views
EXPLAIN SELECT * FROM v1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1`
SELECT * FROM v1;
f1	f11
1	1
2	2
3	3
5	5
9	9
7	7
explain for multitable views
EXPLAIN SELECT * FROM v2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`f2` = `test`.`t1`.`f1`)
SELECT * FROM v2;
f1	f11	f2	f22
1	1	1	1
2	2	2	2
3	3	3	3
explain for views with where
EXPLAIN SELECT * FROM v3 WHERE f11 IN (1,3);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f11` in (1,3)) and (`test`.`t1`.`f1` in (2,3)))
SELECT * FROM v3 WHERE f11 IN (1,3);
f1	f11
3	3
explain for joined views
EXPLAIN
SELECT * FROM v3 JOIN v4 ON f1=f2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`f2` = `test`.`t1`.`f1`) and (`test`.`t1`.`f1` in (2,3)) and (`test`.`t1`.`f1` in (2,3)))
SELECT * FROM v3 JOIN v4 ON f1=f2;
f1	f11	f2	f22
2	2	2	2
3	3	3	3
FLUSH STATUS;
EXPLAIN SELECT * FROM v4 WHERE f2 IN (1,3);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where ((`test`.`t2`.`f2` in (1,3)) and (`test`.`t2`.`f2` in (2,3)))
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	0
FLUSH STATUS;
SELECT * FROM v4 WHERE f2 IN (1,3);
f2	f22
3	3
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	7
for materialized derived tables
explain for simple derived
EXPLAIN SELECT * FROM (SELECT * FROM t1 GROUP BY f1) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` group by `test`.`t1`.`f1`) `tt`
SELECT * FROM (SELECT * FROM t1 HAVING f1=f1) tt;
f1	f11
1	1
2	2
3	3
5	5
9	9
7	7
explain showing created indexes and late materialization
FLUSH STATUS;
EXPLAIN
SELECT * FROM t1 JOIN (SELECT * FROM t2 GROUP BY f2) tt ON f1=f2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.f1	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` group by `test`.`t2`.`f2`) `tt` where (`tt`.`f2` = `test`.`t1`.`f1`)
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	0
FLUSH STATUS;
SELECT * FROM t1 JOIN (SELECT * FROM t2 GROUP BY f2) tt ON f1=f2;
f1	f11	f2	f22
1	1	1	1
2	2	2	2
3	3	3	3
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	6
Handler_read_last	0
Handler_read_next	3
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	21
for materialized views
DROP VIEW v1,v2,v3;
CREATE VIEW v1 AS SELECT * FROM t1 GROUP BY f1;
CREATE VIEW v2 AS SELECT * FROM t2 GROUP BY f2;
CREATE VIEW v3 AS SELECT t1.f1,t1.f11 FROM t1 JOIN t1 AS t11 HAVING t1.f1<100;
ensure that view definitions are cached in the data-dictionary cache.
explain for simple derived
EXPLAIN SELECT * FROM v1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1`
SELECT * FROM v1;
f1	f11
1	1
2	2
3	3
5	5
9	9
7	7
explain showing created indexes and late materialization for views
FLUSH STATUS;
EXPLAIN SELECT * FROM t1 JOIN v2 ON f1=f2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.f1	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v2`.`f2` AS `f2`,`v2`.`f22` AS `f22` from `test`.`t1` join `test`.`v2` where (`v2`.`f2` = `test`.`t1`.`f1`)
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	0
FLUSH STATUS;
SELECT * FROM t1 JOIN v2 ON f1=f2;
f1	f11	f2	f22
1	1	1	1
2	2	2	2
3	3	3	3
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	6
Handler_read_last	0
Handler_read_next	3
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	21
EXPLAIN
SELECT * FROM t1,v3 AS v31,v3 WHERE t1.f1=v31.f1 and t1.f1=v3.f1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.f1	3	100.00	NULL
1	PRIMARY	<derived3>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.f1	3	100.00	NULL
3	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
3	DERIVED	t11	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using join buffer (Block Nested Loop)
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
2	DERIVED	t11	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v31`.`f1` AS `f1`,`v31`.`f11` AS `f11`,`v3`.`f1` AS `f1`,`v3`.`f11` AS `f11` from `test`.`t1` join `test`.`v3` `v31` join `test`.`v3` where ((`v31`.`f1` = `test`.`t1`.`f1`) and (`v3`.`f1` = `test`.`t1`.`f1`))
FLUSH STATUS;
SELECT * FROM t1,v3 AS v31,v3 WHERE t1.f1=v31.f1 and t1.f1=v3.f1;
f1	f11	f1	f11	f1	f11
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
1	1	1	1	1	1
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
2	2	2	2	2	2
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
3	3	3	3	3	3
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
5	5	5	5	5	5
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
9	9	9	9	9	9
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
7	7	7	7	7	7
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	42
Handler_read_last	0
Handler_read_next	252
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	35
explain showing late materialization for views
EXPLAIN SELECT * FROM v1 JOIN v4 ON f1=f2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t2.f2	2	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`v1` join `test`.`t2` where ((`v1`.`f1` = `test`.`t2`.`f2`) and (`test`.`t2`.`f2` in (2,3)))
SELECT * FROM v1 JOIN v4 ON f1=f2;
f1	f11	f2	f22
3	3	3	3
2	2	2	2
merged derived in merged derived
EXPLAIN SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2) zz;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7))
SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2) zz;
f1	f11
3	3
5	5
materialized derived in merged derived
EXPLAIN  SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) zz;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
3	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` where (`tt`.`f1` > 2)
SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) zz;
f1	f11
3	3
5	5
merged derived in materialized derived
EXPLAIN SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2 GROUP BY f1) zz;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select `zz`.`f1` AS `f1`,`zz`.`f11` AS `f11` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7)) group by `test`.`t1`.`f1`) `zz`
SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2 GROUP BY f1) zz;
f1	f11
3	3
5	5
materialized derived in materialized derived
EXPLAIN  SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) zz;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	DERIVED	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using temporary
3	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select `zz`.`f1` AS `f1`,`zz`.`f11` AS `f11` from (/* select#2 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` where (`tt`.`f1` > 2) group by `tt`.`f1`) `zz`
SELECT * FROM (SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) zz;
f1	f11
3	3
5	5
mat in merged derived join mat in merged derived
EXPLAIN  SELECT * FROM 
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) x
JOIN 
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) z
ON x.f1 = z.f1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
1	PRIMARY	<derived5>	NULL	ref	<auto_key0>	<auto_key0>	5	tt.f1	2	100.00	NULL
5	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
3	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11`,`tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` join (/* select#5 */ select `t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` where (`t1`.`f1` < 7) group by `t1`.`f1`) `tt` where ((`tt`.`f1` = `tt`.`f1`) and (`tt`.`f1` > 2) and (`tt`.`f1` > 2))
FLUSH STATUS;
SELECT * FROM 
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) x
JOIN 
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) z
ON x.f1 = z.f1;
f1	f11	f1	f11
3	3	3	3
5	5	5	5
SHOW STATUS LIKE 'Handler_read%';
Variable_name	Value
Handler_read_first	0
Handler_read_key	2
Handler_read_last	0
Handler_read_next	2
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	29
FLUSH STATUS;
merged in merged derived join merged in merged derived
EXPLAIN  SELECT * FROM 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) x
JOIN 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) z
ON x.f1 = z.f1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` join `test`.`t1` where ((`t1`.`f1` = `test`.`t1`.`f1`) and (`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7) and (`test`.`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7))
SELECT * FROM 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) x
JOIN 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) z
ON x.f1 = z.f1;
f1	f11	f1	f11
3	3	3	3
5	5	5	5
materialized in materialized derived join 
materialized in materialized derived
EXPLAIN  SELECT * FROM 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) x
JOIN 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) z
ON x.f1 = z.f1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived4>	NULL	ref	<auto_key0>	<auto_key0>	5	x.f1	2	100.00	NULL
4	DERIVED	<derived5>	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using temporary
5	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
2	DERIVED	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using temporary
3	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select `x`.`f1` AS `f1`,`x`.`f11` AS `f11`,`z`.`f1` AS `f1`,`z`.`f11` AS `f11` from (/* select#2 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` where (`tt`.`f1` > 2) group by `tt`.`f1`) `x` join (/* select#4 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#5 */ select `t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` where (`t1`.`f1` < 7) group by `t1`.`f1`) `tt` where (`tt`.`f1` > 2) group by `tt`.`f1`) `z` where (`z`.`f1` = `x`.`f1`)
SELECT * FROM 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) x
JOIN 
(SELECT * FROM 
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) z
ON x.f1 = z.f1;
f1	f11	f1	f11
3	3	3	3
5	5	5	5
merged view in materialized derived
EXPLAIN
SELECT * FROM (SELECT * FROM v4 GROUP BY 1) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where; Using temporary
Warnings:
Note	1003	/* select#1 */ select `tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where (`test`.`t2`.`f2` in (2,3)) group by `test`.`t2`.`f2`) `tt`
SELECT * FROM (SELECT * FROM v4 GROUP BY 1) tt;
f2	f22
3	3
2	2
materialized view in merged derived
EXPLAIN 
SELECT * FROM ( SELECT * FROM v1 WHERE f1 < 7) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	6	33.33	Using where
3	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` where (`v1`.`f1` < 7)
SELECT * FROM ( SELECT * FROM v1 WHERE f1 < 7) tt;
f1	f11
1	1
2	2
3	3
5	5
merged view in a merged view in a merged derived
CREATE VIEW v6 AS SELECT * FROM v4 WHERE f2 < 7;
EXPLAIN SELECT * FROM (SELECT * FROM v6) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where ((`test`.`t2`.`f2` < 7) and (`test`.`t2`.`f2` in (2,3)))
SELECT * FROM (SELECT * FROM v6) tt;
f2	f22
3	3
2	2
materialized view in a merged view in a materialized derived
CREATE VIEW v7 AS SELECT * FROM v1;
EXPLAIN SELECT * FROM (SELECT * FROM v7 GROUP BY 1) tt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	NULL
2	DERIVED	<derived4>	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
4	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#2 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` group by `v1`.`f1`) `tt`
SELECT * FROM (SELECT * FROM v7 GROUP BY 1) tt;
f1	f11
1	1
2	2
3	3
5	5
9	9
7	7
JOIN of above two
EXPLAIN SELECT * FROM v6 JOIN v7 ON f2=f1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where
1	PRIMARY	<derived5>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t2.f2	2	100.00	NULL
5	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	6	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22`,`v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`t2` join `test`.`v1` where ((`v1`.`f1` = `test`.`t2`.`f2`) and (`test`.`t2`.`f2` < 7) and (`test`.`t2`.`f2` in (2,3)))
SELECT * FROM v6 JOIN v7 ON f2=f1;
f2	f22	f1	f11
3	3	3	3
2	2	2	2
test two keys
CREATE TABLE t3(f3 INT, f33 INT);
INSERT INTO t1 VALUES(6,6),(8,8);
INSERT INTO t3 VALUES(1,1),(2,2),(3,3),(5,5);
EXPLAIN SELECT * FROM t1 JOIN (SELECT * FROM t2) tt ON t1.f1=tt.f2
JOIN t3 ON tt.f22=t3.f3;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t3	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	6	16.67	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	8	12.50	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22`,`test`.`t3`.`f3` AS `f3`,`test`.`t3`.`f33` AS `f33` from `test`.`t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t1`.`f1` = `test`.`t2`.`f2`) and (`test`.`t2`.`f22` = `test`.`t3`.`f3`))
SELECT * FROM t1 JOIN (SELECT * FROM t2) tt ON t1.f1=tt.f2
JOIN t3 ON tt.f22=t3.f3;
f1	f11	f2	f22	f3	f33
1	1	1	1	1	1
2	2	2	2	2	2
3	3	3	3	3	3
DROP TABLE t1,t2,t3;
DROP VIEW v1,v2,v3,v4,v6,v7;
#
#
# BUG#11783262: CRASH IN ITEM_FIELD::ITEM_FIELD IN ITEM.CC ON SUBQUERY
#               IN FROM WITH WL5274 
#
CREATE TABLE t1 (
col_int_key INT,
col_time_key time,
col_varchar_key VARCHAR(1),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=INNODB;
SELECT alias1.col_time_key AS field1
FROM ( ( SELECT SQ1_alias1.* FROM t1 AS SQ1_alias1 ) AS alias1
INNER JOIN t1 AS alias2
ON (alias2.col_int_key = alias1.col_int_key)
)
WHERE alias1.col_int_key = 207
ORDER BY alias1.col_varchar_key, field1;
field1
DROP TABLE t1;
#
# Bug#11807437: VALGRIND WARNING IN MYSQL_DERIVED_OPTIMIZE() LINE 293
#
CREATE TABLE t1 (
f1 int(11) DEFAULT NULL
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
SELECT 1
FROM (
SELECT 1, 2 FROM DUAL
WHERE EXISTS  (
SELECT f1
FROM  t1
)) AS tt
;
1
DROP TABLE t1;
#
#
# Bug#11808582: VALGRIND ON WL#5274: INVALID WRITE IN MC_REPLACE_STRMEM.C:493) 
#
CREATE TABLE t1 (
pk INT NOT NULL AUTO_INCREMENT,
col_int_key INT,
col_time_key time,
col_varchar_key VARCHAR(1),
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=InnoDB;
SELECT tt.col_time_key
FROM ( ( SELECT * FROM t1 ) AS tt
INNER JOIN t1
ON (t1.col_int_key = tt.col_int_key)
)
WHERE tt.col_int_key = 207
ORDER BY tt.col_varchar_key, tt.pk ASC, 1;
col_time_key
DROP TABLE t1;
#
# Bug#11791677 - ASSERTION FAILED IN JOIN_MATERIALIZE_TABLE IN
#                SQL_SELECT.CC ON NESTED SUBQUERY 
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (10,8,'v'), (29,4,'c');
CREATE TABLE t2 (  
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_nokey int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (16,1,'c'), (20,4,'d');
CREATE TABLE t3 (
`field1` varchar(1) DEFAULT NULL,
`field2` int(11) DEFAULT NULL
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t3 VALUES ('m',6),('c',4);
SELECT *
FROM t3
WHERE (field1, field2) IN (
SELECT t1.col_varchar_key AS field1,
t1.col_int_key AS field2
FROM ( t1 INNER JOIN (
SELECT t2.*
FROM t2
WHERE t2.col_int_nokey < t2.pk ) AS alias2
ON (alias2.col_varchar_key = t1.col_varchar_key ) )
GROUP BY field1, field2
ORDER BY t1.col_int_key, t1 .pk DESC )
;
field1	field2
c	4
DROP TABLE t1,t2,t3;
#
#
# Bug#11791705 - CRASH IN JOIN_MATERIALIZE_TABLE OR ASSERTION FAIL:
#                !TAB->SAVE_READ_FIRST_RECORD
#
CREATE TABLE t1 (a INTEGER);
INSERT INTO t1 VALUES (NULL),(NULL);
SELECT * FROM t1
WHERE (a, a) NOT IN
(SELECT * FROM (SELECT 8, 4 UNION SELECT 2, 3) tt) ;
a
DROP TABLE t1;
#
# Bug#11791649 - ASSERT: FIXED == 0, IN ITEM.CC ON EXPLAIN WITH VIEW
#                IN SUBQUERY 
#
CREATE TABLE t1 (pk int);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (col_varchar_nokey varchar(1));
INSERT INTO t2 VALUES ('m'), ('f');
EXPLAIN SELECT pk
FROM t1
WHERE (2) IN
( SELECT *
FROM (SELECT COUNT(col_varchar_nokey) FROM t2) d
)
;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where; FirstMatch(t1)
3	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '1' AS `pk` from <constant table> semi join ((/* select#3 */ select count(`test`.`t2`.`col_varchar_nokey`) AS `COUNT(col_varchar_nokey)` from `test`.`t2`) `d`) where (`d`.`COUNT(col_varchar_nokey)` = 2)
DROP TABLE t1,t2;
#
#
# Bug#12735934 - Lost LIMIT clause caused wrong result.
#
CREATE TABLE t1 (f1 VARCHAR(1), key(f1));
INSERT INTO t1 VALUES ('a');
CREATE VIEW v1 AS SELECT f1 FROM t1 ORDER BY 1 LIMIT 0;
SELECT * FROM v1;
f1
DROP VIEW v1;
DROP TABLE t1;
#
#
# Bug#12726927: An outdated assertion caused server failure.
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_nokey int(11) NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (10,1,'v'), (24,18,'h');
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_date_key date NOT NULL,
col_date_nokey date NOT NULL,
col_time_nokey time NOT NULL,
col_varchar_key varchar(1) NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_date_key (col_date_key),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (1,'1900-01-01','1900-01-01','00:00:00','k','k');
SELECT OUTR.col_date_key
FROM t2 AS OUTR2
LEFT JOIN t2 AS OUTR ON OUTR2.pk < OUTR.pk
WHERE ( OUTR.col_varchar_nokey , OUTR.col_varchar_key )
IN (
SELECT DISTINCT col_varchar_key , col_varchar_key
FROM t1
WHERE col_int_nokey XOR OUTR.col_time_nokey
)
XOR OUTR.col_date_nokey IS NULL
;
col_date_key
NULL
DROP TABLE t1,t2;
#
#
# Bug#12799731 - CRASH IN END_READ_RECORD.
#
create table t1(f1 char(255) charset utf8);
Warnings:
Warning	3719	'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
insert into t1 values('1'),('2'),('3'),('4'),('5'),('6'),('7'),('8'),('9'),('0');
set @save_internal_tmp_mem_storage_engine= @@internal_tmp_mem_storage_engine;
set session internal_tmp_mem_storage_engine='memory';
set @save_heap_size= @@max_heap_table_size;
set @@max_heap_table_size= 1;
Warnings:
Warning	1292	Truncated incorrect max_heap_table_size value: '1'
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
flush status;
select count(*) from t1 join (
select t1.f1 from t1 join t1 as t2 join t1 as t3) tt on t1.f1 = tt.f1;
count(*)
1000
show status like 'Handler_write';
Variable_name	Value
Handler_write	1021
set @@max_heap_table_size= @save_heap_size;
set session internal_tmp_mem_storage_engine= @save_internal_tmp_mem_storage_engine;
SET @@optimizer_switch= @optimizer_switch_saved;
drop table t1;
#
#
# Bug#12896124: Crash on rqg_mdl_stability test
#
CREATE TABLE t1(f1 INT);
INSERT INTO t1 VALUES (1),(2),(3);
CREATE FUNCTION func1 (param1 INTEGER) RETURNS INT NOT DETERMINISTIC
return param1;
CREATE FUNCTION func2 (param1 INTEGER) RETURNS INT 
return param1;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func1(f1);
f1
1
2
3
EXPLAIN SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func1(f1);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	3	33.33	Using where
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `tt`.`f1` AS `f1` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1`) `tt` where (`tt`.`f1` = `func1`(`tt`.`f1`))
SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func2(f1);
f1
1
2
3
EXPLAIN SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func2(f1);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	3	33.33	Using where
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `tt`.`f1` AS `f1` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1`) `tt` where (`tt`.`f1` = `func2`(`tt`.`f1`))
SET @@optimizer_switch= @optimizer_switch_saved;
DROP FUNCTION func1;
DROP FUNCTION func2;
DROP TABLE t1;
#
#
# Bug#12909844: Missing type cast caused false assertion
#
CREATE TABLE t1 ( fk INT) ENGINE=INNODB;
CREATE TABLE t2 (
f1 INT,  f2 INT,  f3 INT,  f4 INT,  f5 INT,  f6 INT,
f7 INT,  f8 INT,  f9 INT,  f10 INT, f11 INT, f12 INT,
f13 INT, f14 INT, f15 INT, f16 INT, f17 INT, f18 INT,
f19 INT, f20 INT, f21 INT, f22 INT, f23 INT, f24 INT,
f25 INT, f26 INT, f27 INT, f28 INT, f29 INT, f30 INT,
f31 INT, f32 TEXT, fk INT) ENGINE=INNODB;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT alias2.fk AS field1 FROM t1 AS alias1 JOIN
(SELECT * FROM t2 ) AS alias2 ON alias1.fk = alias2.fk;
field1
EXPLAIN 
SELECT alias2.fk AS field1 FROM t1 AS alias1 JOIN
(SELECT * FROM t2 ) AS alias2 ON alias1.fk = alias2.fk;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	alias1	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.alias1.fk	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `alias2`.`fk` AS `field1` from `test`.`t1` `alias1` join (/* select#2 */ select `test`.`t2`.`f1` AS `f1`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f3` AS `f3`,`test`.`t2`.`f4` AS `f4`,`test`.`t2`.`f5` AS `f5`,`test`.`t2`.`f6` AS `f6`,`test`.`t2`.`f7` AS `f7`,`test`.`t2`.`f8` AS `f8`,`test`.`t2`.`f9` AS `f9`,`test`.`t2`.`f10` AS `f10`,`test`.`t2`.`f11` AS `f11`,`test`.`t2`.`f12` AS `f12`,`test`.`t2`.`f13` AS `f13`,`test`.`t2`.`f14` AS `f14`,`test`.`t2`.`f15` AS `f15`,`test`.`t2`.`f16` AS `f16`,`test`.`t2`.`f17` AS `f17`,`test`.`t2`.`f18` AS `f18`,`test`.`t2`.`f19` AS `f19`,`test`.`t2`.`f20` AS `f20`,`test`.`t2`.`f21` AS `f21`,`test`.`t2`.`f22` AS `f22`,`test`.`t2`.`f23` AS `f23`,`test`.`t2`.`f24` AS `f24`,`test`.`t2`.`f25` AS `f25`,`test`.`t2`.`f26` AS `f26`,`test`.`t2`.`f27` AS `f27`,`test`.`t2`.`f28` AS `f28`,`test`.`t2`.`f29` AS `f29`,`test`.`t2`.`f30` AS `f30`,`test`.`t2`.`f31` AS `f31`,`test`.`t2`.`f32` AS `f32`,`test`.`t2`.`fk` AS `fk` from `test`.`t2`) `alias2` where (`alias2`.`fk` = `test`.`alias1`.`fk`)
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2;
#
#
# Bug#12910039: Incorrect merge caused segmentation fault.
#
CREATE TABLE t1 (f1 int) ENGINE=myisam;
CREATE TABLE t2 (f1 text) ENGINE=innodb;
SELECT 1 FROM (
( SELECT * FROM ( SELECT * FROM t2 ) AS alias1 ) AS alias1,
( SELECT * FROM t1 ) AS alias2 );
1
DROP TABLE t1,t2;
#
#
# Bug#12910006: MRR initialization on a derived table caused crash.
#
SET @save_switch= @@SESSION.optimizer_switch;
SET @@SESSION.optimizer_switch="batched_key_access=on,derived_merge=off";
CREATE TABLE t1 ( pk integer auto_increment,
col_blob_key blob, primary key (pk)) ENGINE=innodb;
CREATE TABLE t2 (col_tinytext tinytext null,
pk integer auto_increment, col_text text,
col_blob blob, primary key (pk)) ENGINE=innodb;
SELECT alias1.col_text AS field1 ,
alias1.col_tinytext AS field2
FROM t2 AS alias1
LEFT OUTER JOIN ( SELECT * FROM t1 ) AS alias2 ON alias1.pk = alias2.pk
WHERE alias2.pk >=1  AND alias2.pk < 3
ORDER BY field1,field2 ASC;
field1	field2
SET @@SESSION.optimizer_switch= @save_switch;
DROP TABLE t1, t2;
#
# Bug#13106350: MRR initialization on a derived table caused crash.
#
SET @save_switch= @@optimizer_switch;
SET @@optimizer_switch="materialization=off,derived_merge=off";
CREATE TABLE t1 (pk INTEGER PRIMARY KEY, vc VARCHAR(20)) charset utf8mb4;
INSERT INTO t1 VALUES(7, 'seven'), (13, 'thirteen');
CREATE TABLE t2 (pk INTEGER PRIMARY KEY, vc1 VARCHAR(20), vc2 VARCHAR(20)) charset utf8mb4;
INSERT INTO t2 VALUES(7, 'seven', 's'), (14, 'fourteen', 'f');
CREATE TABLE t3 (pk INTEGER PRIMARY KEY, vc VARCHAR(20)) charset utf8mb4;
INSERT INTO t3 VALUES(5, 'f'), (6, 's'), (7, 's');
explain SELECT derived.vc
FROM (SELECT * FROM t1) AS derived
WHERE derived.vc IN (
SELECT t2.vc1
FROM t2 JOIN t3 ON t2.vc2=t3.vc);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Start temporary
1	PRIMARY	t3	NULL	ALL	NULL	NULL	NULL	NULL	3	33.33	Using where; Using join buffer (Block Nested Loop)
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	83	test.t2.vc1	2	100.00	End temporary
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `derived`.`vc` AS `vc` from (/* select#2 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`vc` AS `vc` from `test`.`t1`) `derived` semi join (`test`.`t2` join `test`.`t3`) where ((`test`.`t3`.`vc` = `test`.`t2`.`vc2`) and (`derived`.`vc` = `test`.`t2`.`vc1`))
SELECT derived.vc
FROM (SELECT * FROM t1) AS derived
WHERE derived.vc IN (
SELECT t2.vc1
FROM t2 JOIN t3 ON t2.vc2=t3.vc);
vc
seven
SET @@optimizer_switch= @save_switch;
DROP TABLE t1, t2, t3;
#
#
# Bug#13107577: Derived table in a semi-join caused failed assertion. 
#
SET @save_switch= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
CREATE TABLE t1 (
`col_int_key` int(11) NOT NULL,
`col_varchar_nokey` varchar(1) NOT NULL
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (8,'m'), (4,'b'), (4,'x'), (7,'g'), (4,'p');
CREATE VIEW v1 AS SELECT * FROM t1;
SELECT col_int_key
FROM t1
WHERE ( NOT EXISTS (
SELECT col_varchar_nokey
FROM t1 
WHERE ( 7 ) IN (
SELECT v1.col_int_key
FROM ( v1 JOIN ( SELECT * FROM t1 ) AS d1
ON ( d1.col_varchar_nokey = v1.col_varchar_nokey ) )
)
) )
;
col_int_key
DROP VIEW v1;
DROP TABLE t1;
SET @@optimizer_switch= @save_switch;
#
# Bug#13105833: Crash when using LooseScan sj-strategy for a view.
#
CREATE TABLE t1 (pk int(11)) ENGINE=InnoDB;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (pk int(11)) ENGINE=InnoDB;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (1), (2), (3);
CREATE VIEW v1 AS SELECT DISTINCT pk FROM t1;
SELECT pk 
FROM t2
WHERE pk IN ( SELECT * FROM v1 ) ;
pk
1
DROP TABLE t1,t2;
DROP VIEW v1;
#
#
# Bug#13261277: Unchecked key length caused missing records.
#
CREATE TABLE t1 (  
col_varchar varchar(1024) CHARACTER SET utf8 DEFAULT NULL,
stub1 varchar(1024) CHARACTER SET utf8 DEFAULT NULL,
stub2 varchar(1024) CHARACTER SET utf8 DEFAULT NULL,
stub3 varchar(1024) CHARACTER SET utf8 DEFAULT NULL
);
Warnings:
Warning	3719	'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
Warning	3719	'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
Warning	3719	'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
Warning	3719	'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
INSERT INTO t1 VALUES
('d','d','l','ther'),
(NULL,'s','NJBIQ','trzetuchv'),
(-715390976,'coul','MYWFB','cfhtrzetu'),
(1696792576,'f','i\'s','c'),
  (1,'i','ltpemcfhtr','gsltpemcf'),
  (-663027712,'mgsltpemcf','sa','amgsltpem'),
  (-1686700032,'JPRVK','i','vamgsltpe'),
  (NULL,'STUNB','UNVJV','u'),
  (5,'oka','qyihvamgsl','AXSMD'),
  (NULL,'tqwmqyihva','h','yntqwmqyi'),
  (3,'EGMJN','e','e');
CREATE TABLE t2 (
col_varchar varchar(10) DEFAULT NULL,
col_int INT DEFAULT NULL
) charset utf8mb4;
INSERT INTO t2 VALUES ('d',9);
SET @save_heap_size= @@max_heap_table_size;
SET @@max_heap_table_size= 16384;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT t2.col_int
FROM t2
RIGHT JOIN ( SELECT * FROM t1 ) AS dt 
ON t2.col_varchar = dt.col_varchar
WHERE t2.col_int IS NOT NULL ;
col_int
9
# Shouldn't use auto_key0 for derived table
EXPLAIN 
SELECT t2.col_int
FROM t2
RIGHT JOIN ( SELECT * FROM t1 ) AS dt
ON t2.col_varchar = dt.col_varchar
WHERE t2.col_int IS NOT NULL ;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	11	100.00	Using where
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	11	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '9' AS `col_int` from (/* select#2 */ select `test`.`t1`.`col_varchar` AS `col_varchar`,`test`.`t1`.`stub1` AS `stub1`,`test`.`t1`.`stub2` AS `stub2`,`test`.`t1`.`stub3` AS `stub3` from `test`.`t1`) `dt` where (('9' is not null) and ('d' = convert(`dt`.`col_varchar` using utf8mb4)))
SET @@max_heap_table_size= @save_heap_size;
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1,t2;
#
#
# Bug#13383857: Another crash in memcpy from
#               join_cache::write_record_data with semijoin
#
CREATE TABLE t1 (
col_int_key INT DEFAULT NULL,
col_time_nokey TIME DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) charset latin1;
INSERT INTO t1 VALUES
(8,'22:55:23','x','x'),
(7,'10:19:31','d','d'),
(1,'14:40:36','r','r'),
(7,'04:37:47','f','f'),
(9,'19:34:06','y','y'),
(NULL,'20:35:33','u','u'),
(1,NULL,'m','m'),
(9,'14:43:37',NULL,NULL),
(2,'02:23:09','o','o'),
(9,'01:22:45','w','w'),
(2,'00:00:00','m','m'),
(4,'00:13:25','q','q'),
(0,'03:47:16',NULL,NULL),
(4,'01:41:48','d','d'),
(8,'00:00:00','g','g'),
(NULL,'22:32:04','x','x'),
(NULL,'16:44:14','f','f'),
(0,'17:38:37','p','p'),
(NULL,'08:46:48','j','j'),
(8,'14:11:27','c','c');
CREATE TABLE t2 (
col_int_key INT DEFAULT NULL,
col_time_nokey TIME DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) charset latin1;
INSERT INTO t2 VALUES
(4,'22:34:09','v','v'),
(62,'14:26:02','v','v'),
(7,'14:03:03','c','c'),
(1,'01:46:09',NULL,NULL),
(0,'16:21:18','x','x'),
(7,'18:56:33','i','i'),
(7,NULL,'e','e'),
(1,'09:29:08','p','p'),
(7,'19:11:10','s','s'),
(1,'11:57:26','j','j'),
(5,'00:39:46','z','z'),
(2,'03:28:15','c','c'),
(0,'06:44:18','a','a'),
(1,'14:36:39','q','q'),
(8,'18:42:45','y','y'),
(1,'02:57:29',NULL,NULL),
(1,'16:46:13','r','r'),
(9,'19:39:02','v','v'),
(1,NULL,NULL,NULL),
(5,'20:58:33','r','r');
CREATE TABLE t3 (
col_int_key INT DEFAULT NULL,
col_time_nokey TIME DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) charset latin1;
INSERT INTO t3 VALUES (8,'04:07:22','g','g');
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
explain SELECT col_time_nokey AS x
FROM (SELECT * FROM t2) AS outr
WHERE col_varchar_nokey IN (
SELECT innr.col_varchar_key
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t1) AS innr
ON innr2.col_varchar_key >= innr.col_varchar_key
WHERE outr.col_varchar_nokey = 'e'
  )
AND outr.col_varchar_key <> 'r'
;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived4>	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where; Start temporary
1	PRIMARY	<derived5>	NULL	ref	<auto_key0>	<auto_key0>	4	const	2	100.00	NULL
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	20	9.00	Using where; End temporary; Using join buffer (Block Nested Loop)
5	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	20	100.00	NULL
4	DERIVED	t3	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	20	100.00	NULL
Warnings:
Note	1276	Field or reference 'outr.col_varchar_nokey' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `outr`.`col_time_nokey` AS `x` from (/* select#2 */ select `test`.`t2`.`col_int_key` AS `col_int_key`,`test`.`t2`.`col_time_nokey` AS `col_time_nokey`,`test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `outr` semi join ((/* select#4 */ select '8' AS `col_int_key`,'04:07:22' AS `col_time_nokey`,'g' AS `col_varchar_key`,'g' AS `col_varchar_nokey` from dual) `innr2` join (/* select#5 */ select `test`.`t1`.`col_int_key` AS `col_int_key`,`test`.`t1`.`col_time_nokey` AS `col_time_nokey`,`test`.`t1`.`col_varchar_key` AS `col_varchar_key`,`test`.`t1`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t1`) `innr`) where ((`innr`.`col_varchar_key` = 'e') and (`outr`.`col_varchar_nokey` = 'e') and (`outr`.`col_varchar_key` <> 'r') and (`innr2`.`col_varchar_key` >= 'e'))
SELECT col_time_nokey AS x
FROM (SELECT * FROM t2) AS outr
WHERE col_varchar_nokey IN (
SELECT innr.col_varchar_key
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t1) AS innr
ON innr2.col_varchar_key >= innr.col_varchar_key
WHERE outr.col_varchar_nokey = 'e'
  )
AND outr.col_varchar_key <> 'r'
;
x
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2, t3;
#
# Bug#13354889: Crash on a derived table with more than 64 fields.
#
create table t1 (
field00 int, field01 int, field02 int, field03 int,
field04 int, field05 int, field06 int, field07 int,
field10 int, field11 int, field12 int, field13 int,
field14 int, field15 int, field16 int, field17 int,
field20 int, field21 int, field22 int, field23 int,
field24 int, field25 int, field26 int, field27 int,
field30 int, field31 int, field32 int, field33 int,
field34 int, field35 int, field36 int, field37 int,
field40 int, field41 int, field42 int, field43 int,
field44 int, field45 int, field46 int, field47 int,
field50 int, field51 int, field52 int, field53 int,
field54 int, field55 int, field56 int, field57 int,
field60 int, field61 int, field62 int, field63 int,
field64 int, field65 int, field66 int, field67 int,
field70 int, field71 int, field72 int, field73 int,
field74 int, field75 int, field76 int, field77 int,
field100 int
);
insert into t1(field100) values (1),(2),(3),(4),(5),(6),(7),(8),(9),(0);
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
select tt.field100 from t1 join (select * from t1) tt where t1.field100=tt.field100
limit 1;
field100
1
Should use auto_key0 and ref access.
explain 
select tt.field100 from t1 join (select * from t1) tt where t1.field100=tt.field100
limit 1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	80	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.field100	8	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	80	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `tt`.`field100` AS `field100` from `test`.`t1` join (/* select#2 */ select `test`.`t1`.`field00` AS `field00`,`test`.`t1`.`field01` AS `field01`,`test`.`t1`.`field02` AS `field02`,`test`.`t1`.`field03` AS `field03`,`test`.`t1`.`field04` AS `field04`,`test`.`t1`.`field05` AS `field05`,`test`.`t1`.`field06` AS `field06`,`test`.`t1`.`field07` AS `field07`,`test`.`t1`.`field10` AS `field10`,`test`.`t1`.`field11` AS `field11`,`test`.`t1`.`field12` AS `field12`,`test`.`t1`.`field13` AS `field13`,`test`.`t1`.`field14` AS `field14`,`test`.`t1`.`field15` AS `field15`,`test`.`t1`.`field16` AS `field16`,`test`.`t1`.`field17` AS `field17`,`test`.`t1`.`field20` AS `field20`,`test`.`t1`.`field21` AS `field21`,`test`.`t1`.`field22` AS `field22`,`test`.`t1`.`field23` AS `field23`,`test`.`t1`.`field24` AS `field24`,`test`.`t1`.`field25` AS `field25`,`test`.`t1`.`field26` AS `field26`,`test`.`t1`.`field27` AS `field27`,`test`.`t1`.`field30` AS `field30`,`test`.`t1`.`field31` AS `field31`,`test`.`t1`.`field32` AS `field32`,`test`.`t1`.`field33` AS `field33`,`test`.`t1`.`field34` AS `field34`,`test`.`t1`.`field35` AS `field35`,`test`.`t1`.`field36` AS `field36`,`test`.`t1`.`field37` AS `field37`,`test`.`t1`.`field40` AS `field40`,`test`.`t1`.`field41` AS `field41`,`test`.`t1`.`field42` AS `field42`,`test`.`t1`.`field43` AS `field43`,`test`.`t1`.`field44` AS `field44`,`test`.`t1`.`field45` AS `field45`,`test`.`t1`.`field46` AS `field46`,`test`.`t1`.`field47` AS `field47`,`test`.`t1`.`field50` AS `field50`,`test`.`t1`.`field51` AS `field51`,`test`.`t1`.`field52` AS `field52`,`test`.`t1`.`field53` AS `field53`,`test`.`t1`.`field54` AS `field54`,`test`.`t1`.`field55` AS `field55`,`test`.`t1`.`field56` AS `field56`,`test`.`t1`.`field57` AS `field57`,`test`.`t1`.`field60` AS `field60`,`test`.`t1`.`field61` AS `field61`,`test`.`t1`.`field62` AS `field62`,`test`.`t1`.`field63` AS `field63`,`test`.`t1`.`field64` AS `field64`,`test`.`t1`.`field65` AS `field65`,`test`.`t1`.`field66` AS `field66`,`test`.`t1`.`field67` AS `field67`,`test`.`t1`.`field70` AS `field70`,`test`.`t1`.`field71` AS `field71`,`test`.`t1`.`field72` AS `field72`,`test`.`t1`.`field73` AS `field73`,`test`.`t1`.`field74` AS `field74`,`test`.`t1`.`field75` AS `field75`,`test`.`t1`.`field76` AS `field76`,`test`.`t1`.`field77` AS `field77`,`test`.`t1`.`field100` AS `field100` from `test`.`t1`) `tt` where (`tt`.`field100` = `test`.`t1`.`field100`) limit 1
SET @@optimizer_switch= @optimizer_switch_saved;
drop table t1;
#
#
# Bug#13390138: crash in memcpy from join_cache::write_record_data
#
CREATE TABLE t1 (
col_varchar_key varchar(1),
col_varchar_nokey varchar(1),
KEY col_varchar_key (col_varchar_key)
) charset utf8mb4 ENGINE=MyISAM;
INSERT INTO t1 VALUES ('r','r');
CREATE TABLE t2 (
col_varchar_key varchar(1),
col_varchar_nokey varchar(1),
KEY col_varchar_key (col_varchar_key)
) charset utf8mb4;
INSERT INTO t2 VALUES
(NULL,NULL),
('r','r');
CREATE TABLE t3 (
col_int_key int,
col_varchar_key varchar(1),
col_varchar_nokey varchar(1),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key, col_int_key)
) charset utf8mb4;
INSERT INTO t3 VALUES
(9,'f','f'),
(4,'y','y'),
(3,'u','u'),
(2,'m','m'),
(NULL,NULL,NULL),
(2,'o','o'),
(NULL,'r','r'),
(6,'m','m'),
(7,'q','q'),
(6,'c','c');
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
explain SELECT grandparent.col_varchar_nokey AS g1
FROM (SELECT * FROM t3) AS grandparent
WHERE grandparent.col_varchar_nokey IN
(SELECT parent.col_varchar_key AS p1
FROM (SELECT * FROM t2) AS parent
WHERE grandparent.col_varchar_key IN (
SELECT child1.col_varchar_key AS c1
FROM (SELECT * FROM t1) AS child1
LEFT JOIN (SELECT * FROM t2) AS child2
ON child1.col_varchar_nokey <> child2.col_varchar_key
)
AND grandparent.col_int_key IS UNKNOWN
)
ORDER BY grandparent.col_varchar_nokey;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	const	2	100.00	Using where; Using index; Using temporary; Using filesort; Start temporary
1	PRIMARY	<derived6>	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where; Using join buffer (Block Nested Loop)
1	PRIMARY	<derived4>	NULL	ref	<auto_key0>	<auto_key0>	7	grandparent.col_varchar_nokey	2	100.00	NULL
1	PRIMARY	<derived7>	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; End temporary; Using join buffer (Block Nested Loop)
7	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
6	DERIVED	t1	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
4	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	DERIVED	t3	NULL	ALL	NULL	NULL	NULL	NULL	10	100.00	NULL
Warnings:
Note	1276	Field or reference 'grandparent.col_varchar_key' of SELECT #3 was resolved in SELECT #1
Note	1276	Field or reference 'grandparent.col_int_key' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select `grandparent`.`col_varchar_nokey` AS `g1` from (/* select#2 */ select `test`.`t3`.`col_int_key` AS `col_int_key`,`test`.`t3`.`col_varchar_key` AS `col_varchar_key`,`test`.`t3`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t3`) `grandparent` semi join ((/* select#4 */ select `test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `parent` join (/* select#6 */ select 'r' AS `col_varchar_key`,'r' AS `col_varchar_nokey` from dual) `child1` left join (/* select#7 */ select `test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `child2` on((`child1`.`col_varchar_nokey` <> `child2`.`col_varchar_key`))) where ((`child1`.`col_varchar_key` = `grandparent`.`col_varchar_key`) and (`parent`.`col_varchar_key` = `grandparent`.`col_varchar_nokey`) and (`grandparent`.`col_int_key` is null)) order by `grandparent`.`col_varchar_nokey`
SELECT grandparent.col_varchar_nokey AS g1
FROM (SELECT * FROM t3) AS grandparent
WHERE grandparent.col_varchar_nokey IN
(SELECT parent.col_varchar_key AS p1
FROM (SELECT * FROM t2) AS parent
WHERE grandparent.col_varchar_key IN (
SELECT child1.col_varchar_key AS c1
FROM (SELECT * FROM t1) AS child1
LEFT JOIN (SELECT * FROM t2) AS child2
ON child1.col_varchar_nokey <> child2.col_varchar_key
)
AND grandparent.col_int_key IS UNKNOWN
)
ORDER BY grandparent.col_varchar_nokey;
g1
r
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2, t3;
#
# Bug#13457552: Crash on instantiating a derived table in a query with
#               empty result.
#
CREATE TABLE t1 ( pk INT, col_blob BLOB ) ENGINE = MyISAM;
CREATE TABLE t2 ( pk INT, col_blob BLOB ) ENGINE = InnoDB;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
FLUSH STATUS;
SELECT pk FROM ( SELECT col_blob, pk FROM t2 ) AS A NATURAL JOIN t1;
pk
SHOW STATUS LIKE 'Created_tmp_tables';
Variable_name	Value
Created_tmp_tables	0
EXPLAIN SELECT pk FROM ( SELECT col_blob, pk FROM t2 ) AS a NATURAL JOIN t1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `a`.`pk` AS `pk` from (/* select#2 */ select `test`.`t2`.`col_blob` AS `col_blob`,`test`.`t2`.`pk` AS `pk` from `test`.`t2`) `a` join `test`.`t1` where (multiple equal(`a`.`col_blob`, NULL) and multiple equal(`a`.`pk`, NULL))
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1,t2;
#
# Bug #13801019 ASSERTION `0' FAILED IN CREATE_MYISAM_TMP_TABLE
#
CREATE TABLE t1 (a INT, b BLOB) ENGINE=InnoDB;
CREATE TABLE t2 (c INT);
CREATE TABLE t3 (d INT);
INSERT INTO t3 VALUES (0);
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT * FROM (SELECT * FROM t1) AS a1 RIGHT JOIN t3 LEFT JOIN t2 ON d=c ON a=c;
a	b	d	c
NULL	NULL	0	NULL
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2, t3;
#
# Bug #17814492 - INVALID RESULTS FROM SUBQUERY WITH IN CLAUSE
#
CREATE TABLE t1 (
a INTEGER NOT NULL,
b VARCHAR(1000) NOT NULL,
c TEXT NOT NULL
)ENGINE=InnoDB;
INSERT INTO t1 VALUES (1, 'xxx', 'abc');
INSERT INTO t1 VALUES (2, 'yyy', 'abc');
INSERT INTO t1 SELECT a, b, c FROM t1 WHERE b='yyy';
INSERT INTO t1 SELECT a, b, c FROM t1 WHERE b='yyy';
INSERT INTO t1 SELECT a, b, c FROM t1 WHERE b='yyy';
CREATE TABLE t2 (
a INTEGER NOT NULL
)ENGINE=InnoDB;
INSERT INTO t2 VALUES (1), (2);
ANALYZE TABLE t1,t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
test.t2	analyze	status	OK
SET @save_optimizer_switch= @@optimizer_switch;
SET @@SESSION.optimizer_switch="index_condition_pushdown=on";
EXPLAIN SELECT a1.a, a1.b, a1.c FROM (SELECT a, b, c FROM t1 ) a1
JOIN t2 ON a1.a=t2.a WHERE a1.b='xxx';
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	9	11.11	Using where
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`b` = 'xxx'))
SELECT a1.a, a1.b, a1.c FROM (SELECT a, b, c FROM t1 ) a1
JOIN t2 ON a1.a=t2.a WHERE a1.b='xxx';
a	b	c
1	xxx	abc
SET @@SESSION.optimizer_switch= @save_optimizer_switch;
DROP TABLE t2, t1;
# End of test for Bug #17814492
#
# WL#5275 Process subqueries in FROM clause in the same way as view
#
CREATE TABLE t1(a INTEGER, b INTEGER);
CREATE TABLE t2(a INTEGER, b INTEGER);
INSERT INTO t1 VALUES(1, 10), (2, 20);
INSERT INTO t2 VALUES(1, 100), (2, 200);
SELECT *
FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1, (SELECT * FROM t2) AS dt WHERE t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1, (SELECT * FROM t2) AS dt WHERE t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM (t1 JOIN t2 ON t1.a=t2.a) JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b	a	b
1	10	1	100	1	100
2	20	2	200	2	200
explain SELECT *
FROM (t1 JOIN t2 ON t1.a=t2.a) JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
a	b	b	a	b
1	10	100	1	100
2	20	200	2	200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t1.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt1
ON t1.a=dt1.a AND t2.b=dt1.b
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt2
ON dt1.a=dt2.a;
a	b	b	a	b	a	b
1	10	100	1	100	1	100
2	20	200	2	200	2	200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t1.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt1
ON t1.a=dt1.a AND t2.b=dt1.b
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt2
ON dt1.a=dt2.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)
WHERE t1.b > 15) AS dt ON t1.a=dt.a;
a	b	a	b
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)
WHERE t1.b > 15) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`b` > 15))
SELECT *
FROM t1 JOIN (SELECT * FROM t2
WHERE a IN (SELECT a FROM t1)) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2
WHERE a IN (SELECT a FROM t1)) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; FirstMatch(t2); Using join buffer (Block Nested Loop)
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` join `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`))
SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION SELECT * FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION SELECT * FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key1>	<auto_key1>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
3	UNION	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
NULL	UNION RESULT	<union2,3>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` union /* select#3 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION ALL SELECT * FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
1	10	1	100
2	20	2	200
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION ALL SELECT * FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
3	UNION	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` union all /* select#3 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT DISTINCT a, b FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT DISTINCT a, b FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT SUM(a) AS a, SUM(b) AS b FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b
explain SELECT *
FROM t1 JOIN (SELECT SUM(a) AS a, SUM(b) AS b FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'3' AS `a`,'300' AS `b` from `test`.`t1` where (`test`.`t1`.`a` = '3')
SELECT *
FROM t1 JOIN (SELECT a, SUM(b) AS b FROM t2 GROUP BY a) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT a, SUM(b) AS b FROM t2 GROUP BY a) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,sum(`test`.`t2`.`b`) AS `b` from `test`.`t2` group by `test`.`t2`.`a`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT 1 AS a FROM t2 HAVING COUNT(*) > 1) AS dt ON t1.a=dt.a;
a	b	a
1	10	1
explain SELECT *
FROM t1 JOIN (SELECT 1 AS a FROM t2 HAVING COUNT(*) > 1) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,NULL AS `a` from `test`.`t1` join (/* select#2 */ select 1 AS `a` from `test`.`t2` having (count(0) > 1)) `dt` where multiple equal(`test`.`t1`.`a`, NULL)
SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 1) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 1) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'1' AS `a`,'100' AS `b` from `test`.`t1` where (`test`.`t1`.`a` = '1')
SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 2 OFFSET 1) AS dt ON t1.a=dt.a;
a	b	a	b
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 2 OFFSET 1) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` limit 1,2) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT 1 AS a) AS dt ON t1.a=dt.a;
a	b	a
1	10	1
explain SELECT *
FROM t1 JOIN (SELECT 1 AS a) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'1' AS `a` from `test`.`t1` where (`test`.`t1`.`a` = '1')
SELECT *
FROM t1 JOIN (SELECT a, b, @c:= a+b FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b	@c:= a+b
1	10	1	100	101
2	20	2	200	202
Warnings:
Warning	1287	Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
explain SELECT *
FROM t1 JOIN (SELECT a, b, @c:= a+b FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
Warnings:
Warning	1287	Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b`,`dt`.`@c:= a+b` AS `@c:= a+b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,(@c:=(`test`.`t2`.`a` + `test`.`t2`.`b`)) AS `@c:= a+b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
a	b
1	100
2	200
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using filesort
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`a`
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
a	b
2	200
1	100
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using filesort
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`a` desc
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
WHERE dt.a > 0;
a	b
1	100
2	200
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
WHERE dt.a > 0;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using filesort
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`a` > 0) order by `test`.`t2`.`a`
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
WHERE dt.a > 0;
a	b
2	200
1	100
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
WHERE dt.a > 0;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using filesort
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`a` > 0) order by `test`.`t2`.`a` desc
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
GROUP BY dt.a;
a	COUNT(*)
1	1
2	1
explain SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
GROUP BY dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,count(0) AS `COUNT(*)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
GROUP BY dt.a;
a	COUNT(*)
1	1
2	1
explain SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
GROUP BY dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a`,count(0) AS `COUNT(*)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
COUNT(*)
2
explain SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	/* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2`
SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
COUNT(*)
2
explain SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	/* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2`
SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
a	b
1	100
2	200
explain SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`
SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
a	b
1	100
2	200
explain SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a
ORDER BY t1.b;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a
ORDER BY t1.b;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary; Using filesort
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`) order by `test`.`t1`.`b`
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a
ORDER BY t1.b;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a
ORDER BY t1.b;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary; Using filesort
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
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` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`) order by `test`.`t1`.`b`
SELECT *
FROM t1 JOIN (SELECT a, (SELECT COUNT(*) FROM t1) AS b FROM t2) AS dt
ON t1.a=dt.a;
a	b	a	b
1	10	1	2
2	20	2	2
explain SELECT *
FROM t1 JOIN (SELECT a, (SELECT COUNT(*) FROM t1) AS b FROM t2) AS dt
ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
3	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,(/* select#3 */ select count(0) from `test`.`t1`) AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT a, (SELECT b) AS b FROM t2) AS dt ON t1.a=dt.a;
a	b	a	b
1	10	1	100
2	20	2	200
explain SELECT *
FROM t1 JOIN (SELECT a, (SELECT b) AS b FROM t2) AS dt ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
3	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1276	Field or reference 'test.t2.b' of SELECT #3 was resolved in SELECT #2
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,(/* select#3 */ select `test`.`t2`.`b`) AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
a	b	b	a	b
1	10	100	1	100
2	20	200	2	200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	PRIMARY	<derived2>	NULL	ref	<auto_key0>	<auto_key0>	5	test.t1.a	2	100.00	NULL
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join `test`.`t2` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)) `dt` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`dt`.`a` = `test`.`t1`.`a`))
SET @@optimizer_switch="derived_merge=on";
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
a	b	b	a	b
1	10	100	1	100
2	20	200	2	200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	NULL
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SET @@optimizer_switch= @optimizer_switch_saved;
INSERT INTO (SELECT * FROM t1) AS dt VALUES(9, 99);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT * FROM t1) AS dt VALUES(9, 99)' at line 1
INSERT INTO (SELECT * FROM t1) AS dt SELECT 9, 99;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT * FROM t1) AS dt SELECT 9, 99' at line 1
UPDATE (SELECT * FROM t1) AS dt SET b=b+1;
ERROR HY000: The target table dt of the UPDATE is not updatable
UPDATE t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a SET dt.b=dt.b+1;
ERROR HY000: The target table t2 of the UPDATE is not updatable
DELETE FROM (SELECT * FROM t1) AS dt WHERE a=1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT * FROM t1) AS dt WHERE a=1' at line 1
DELETE dt FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a WHERE t1.a=1;
ERROR HY000: The target table dt of the DELETE is not updatable
UPDATE t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a SET t1.b=t1.b+1;
DELETE t1 FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a WHERE t1.a=1;
SELECT * FROM t1;
a	b
2	21
SELECT * FROM t2;
a	b
1	100
2	200
DROP TABLE t1, t2;
# Bug#19791944: Assert fail in subselect_hash_sj_engine::exec
CREATE TABLE t1 (
pk int NOT NULL,
col_int_key int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key, col_int_key)
) charset utf8mb4;
INSERT INTO t1 VALUES
(1,4,'j'), (2,6,'v'), (3,3,'c'), (4,5,'m'), (5,3,'d'), (6,246,'d'), (7,2,'y'), (8,9,'t'),
(9,3,'d'), (10,8,'s'), (11,1,'r'), (12,8,'m'), (13,8,'b'), (14,5,'x'), (15,7,'g'), (16,5,'p'),
(17,1,'q'), (18,6,'w'), (19,2,'d'), (20,9,'e');
CREATE TABLE t2 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_int_key int NOT NULL,
col_date_key date NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_date_key (col_date_key)
) charset utf8mb4;
INSERT INTO t2 VALUES (1,1,7,'1900-01-01','k');
CREATE TABLE t3 (
pk int NOT NULL ,
col_date_nokey date NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk)
) charset utf8mb4;
INSERT INTO t3 VALUES (10,'1900-01-01','b');
EXPLAIN SELECT outr.col_date_key AS x
FROM (SELECT * FROM t1) AS outr2 LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_varchar_key = outr.col_varchar_nokey
WHERE (outr.col_int_key, outr.col_int_key) IN
(SELECT innr.pk AS x, innr.pk AS y
FROM (SELECT * FROM t3) AS innr
WHERE innr.col_date_nokey IS NOT NULL XOR
innr.col_varchar_nokey > 'p'
        ORDER BY innr.col_date_nokey) XOR
(outr.col_int_nokey < 2 OR
NOT outr.col_int_key IS NULL)
ORDER BY outr.col_int_key,
outr.pk;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	index	NULL	col_varchar_key	10	NULL	20	100.00	Using index; Using temporary; Using filesort
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where; Using join buffer (Block Nested Loop)
4	DEPENDENT SUBQUERY	t3	NULL	system	PRIMARY	NULL	NULL	NULL	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`col_date_key` AS `x` from `test`.`t1` left join (`test`.`t2`) on((`test`.`t2`.`col_varchar_nokey` = `test`.`t1`.`col_varchar_key`)) where (<in_optimizer>((`test`.`t2`.`col_int_key`,`test`.`t2`.`col_int_key`),<exists>(/* select#4 */ select 1,1 from dual where ((true xor ('b' > 'p')) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_key`) = '10') or ('10' is null)), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_key`) = '10') or ('10' is null)), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>('10'), true) and <if>(outer_field_is_not_null, <is_not_null_test>('10'), true)))) xor ((`test`.`t2`.`col_int_nokey` < 2) or (`test`.`t2`.`col_int_key` is not null))) order by `test`.`t2`.`col_int_key`,`test`.`t2`.`pk`
SELECT outr.col_date_key AS x
FROM (SELECT * FROM t1) AS outr2 LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_varchar_key = outr.col_varchar_nokey
WHERE (outr.col_int_key, outr.col_int_key) IN
(SELECT innr.pk AS x, innr.pk AS y
FROM (SELECT * FROM t3) AS innr
WHERE innr.col_date_nokey IS NOT NULL XOR
innr.col_varchar_nokey > 'p'
        ORDER BY innr.col_date_nokey) XOR
(outr.col_int_nokey < 2 OR
NOT outr.col_int_key IS NULL)
ORDER BY outr.col_int_key,
outr.pk;
x
DROP TABLE t1, t2, t3;
# Bug#20087645: Assert fail in subselect_hash_sj_engine::exec
CREATE TABLE t1 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key(col_varchar_key)
) charset utf8mb4 ENGINE=InnoDB;
INSERT INTO t1 VALUES
(10,1,'v'), (11,7,'s'), (12,4,'l'), (13,7,'y'), (14,0,'c'), (15,2,'i');
CREATE TABLE t2 (
pk int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) charset utf8mb4 ENGINE=InnoDB;
INSERT INTO t2 VALUES (1,'k','k');
CREATE TABLE t3 (
pk int NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk)
) charset utf8mb4 ENGINE=InnoDB;
INSERT INTO t3 VALUES
(1,'j'), (2,'v'), (3,'c'), (4,'m'), (5,'d');
ANALYZE TABLE t1, t2, t3;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
test.t2	analyze	status	OK
test.t3	analyze	status	OK
EXPLAIN SELECT table1.pk
FROM (SELECT * FROM t1) AS table1
LEFT JOIN
(SELECT * FROM t1) AS table2
RIGHT OUTER JOIN
(SELECT * FROM t2) AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.pk = table2.col_int_nokey
WHERE table3.col_varchar_key <> ALL
(SELECT sq1_t1.col_varchar_nokey AS sq1_field1
FROM (SELECT * FROM t3) AS sq1_t1
LEFT OUTER JOIN
(SELECT * FROM t1) AS sq1_t2
ON sq1_t2.col_varchar_key = sq1_t1.col_varchar_nokey
) OR
table1.pk = 96;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	index	PRIMARY	col_varchar_key	6	NULL	6	100.00	Using index
1	PRIMARY	t2	NULL	ALL	PRIMARY	NULL	NULL	NULL	1	100.00	Using where
1	PRIMARY	t1	NULL	ref	col_varchar_key	col_varchar_key	6	test.t2.col_varchar_nokey	1	100.00	Using where
5	SUBQUERY	t3	NULL	ALL	NULL	NULL	NULL	NULL	5	100.00	NULL
5	SUBQUERY	t1	NULL	ref	col_varchar_key	col_varchar_key	6	test.t3.col_varchar_nokey	1	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` left join (`test`.`t2` join `test`.`t1`) on(((`test`.`t1`.`col_varchar_key` = `test`.`t2`.`col_varchar_nokey`) and (`test`.`t1`.`col_int_nokey` = `test`.`t2`.`pk`))) where (<in_optimizer>(`test`.`t2`.`col_varchar_key`,`test`.`t2`.`col_varchar_key` in ( <materialize> (/* select#5 */ select `test`.`t3`.`col_varchar_nokey` AS `sq1_field1` from `test`.`t3` left join (`test`.`t1`) on((`test`.`t1`.`col_varchar_key` = `test`.`t3`.`col_varchar_nokey`)) where true ), <primary_index_lookup>(`test`.`t2`.`col_varchar_key` in <temporary table> on <auto_distinct_key> where ((`test`.`t2`.`col_varchar_key` = `materialized-subquery`.`sq1_field1`)))) is false) or (`test`.`t1`.`pk` = 96))
SELECT table1.pk
FROM (SELECT * FROM t1) AS table1
LEFT JOIN
(SELECT * FROM t1) AS table2
RIGHT OUTER JOIN
(SELECT * FROM t2) AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.pk = table2.col_int_nokey
WHERE table3.col_varchar_key <> ALL
(SELECT sq1_t1.col_varchar_nokey AS sq1_field1
FROM (SELECT * FROM t3) AS sq1_t1
LEFT OUTER JOIN
(SELECT * FROM t1) AS sq1_t2
ON sq1_t2.col_varchar_key = sq1_t1.col_varchar_nokey
) OR
table1.pk = 96;
pk
DROP TABLE t1, t2, t3;
# Bug#19812352: Assert fail in subselect_hash_sj_engine::setup
CREATE TABLE t1 (
col_time_nokey time NOT NULL
);
INSERT INTO t1 VALUES ('00:00:00');
CREATE TABLE t2 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_int_key int NOT NULL,
col_date_nokey date NOT NULL,
col_varchar_key varchar(1) NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key(col_int_key),
KEY col_varchar_key(col_varchar_key, col_int_key)
) charset utf8mb4;
INSERT INTO t2 VALUES
(1,4,0,'0001-01-01','j','j'), (2,6,8,'2004-09-18','v','v'),
(3,3,1,'2009-12-01','c','c'), (4,5,8,'2004-12-17','m','m'),
(5,3,9,'2000-03-14','d','d'), (6,246,24,'2000-10-08','d','d'),
(7,2,6,'2006-05-25','y','y'), (8,9,1,'2008-01-23','t','t'),
(9,3,6,'2007-06-18','d','d'), (10,8,2,'2002-10-13','s','s'),
(11,1,4,'1900-01-01','r','r'), (12,8,8,'0001-01-01','m','m'),
(13,8,4,'2006-03-09','b','b'), (14,5,4,'2001-06-05','x','x'),
(15,7,7,'2006-05-28','g','g'), (16,5,4,'2001-04-19','p','p'),
(17,1,1,'1900-01-01','q','q'), (18,6,9,'2004-08-20','w','w'),
(19,2,4,'2004-10-10','d','d'), (20,9,8,'2000-04-02','e','e');
CREATE TABLE t3 (
pk int NOT NULL,
col_int_key int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key, col_int_key)
) charset utf8mb4;
INSERT INTO t3 VALUES
(10,1,'v'), (11,7,'s'), (12,4,'l'), (13,7,'y'), (14,0,'c'),
(15,2,'i'), (16,9,'h'), (17,4,'q'), (18,0,'a'), (19,9,'v'),
(20,1,'u'), (21,3,'s'), (22,8,'y'), (23,8,'z'), (24,18,'h'),
(25,84,'p'), (26,6,'e'), (27,3,'i'), (28,6,'y'), (29,6,'w');
CREATE TABLE t4 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_int_key int NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) charset utf8mb4;
INSERT INTO t4 VALUES (10,8,7,'b');
EXPLAIN SELECT outr.pk AS x
FROM (SELECT * FROM t1) AS outr2
LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_time_nokey >= outr.col_date_nokey
WHERE (outr.col_int_nokey, outr.col_int_key) IN
(SELECT innr.col_int_key AS x,
innr.col_int_nokey AS y
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t4) AS innr
ON innr2.col_varchar_key <> innr.col_varchar_nokey
WHERE innr.col_int_key <> innr.pk OR innr.pk = 9
) AND
outr.pk < 7 XOR outr.col_varchar_nokey <> 'i'
ORDER BY outr.col_varchar_key, outr.pk;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	system	NULL	NULL	NULL	NULL	1	100.00	Using filesort
1	PRIMARY	t2	NULL	ALL	NULL	NULL	NULL	NULL	20	21.11	Using where
4	DEPENDENT SUBQUERY	t4	NULL	system	PRIMARY,col_int_key	NULL	NULL	NULL	1	100.00	NULL
4	DEPENDENT SUBQUERY	t3	NULL	index	NULL	col_varchar_key	10	NULL	20	90.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t2`.`pk` AS `x` from `test`.`t2` where (((<in_optimizer>((`test`.`t2`.`col_int_nokey`,`test`.`t2`.`col_int_key`),<exists>(/* select#4 */ select 1,1 from `test`.`t3` where ((('7' <> '10') or false) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_nokey`) = '7') or ('7' is null)), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_key`) = '8') or ('8' is null)), true) and (`test`.`t3`.`col_varchar_key` <> 'b')) having (<if>(outer_field_is_not_null, <is_not_null_test>('7'), true) and <if>(outer_field_is_not_null, <is_not_null_test>('8'), true)))) and (`test`.`t2`.`pk` < 7)) xor (`test`.`t2`.`col_varchar_nokey` <> 'i')) and ('00:00:00' >= `test`.`t2`.`col_date_nokey`)) order by `test`.`t2`.`col_varchar_key`,`test`.`t2`.`pk`
SELECT outr.pk AS x
FROM (SELECT * FROM t1) AS outr2
LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_time_nokey >= outr.col_date_nokey
WHERE (outr.col_int_nokey, outr.col_int_key) IN
(SELECT innr.col_int_key AS x,
innr.col_int_nokey AS y
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t4) AS innr
ON innr2.col_varchar_key <> innr.col_varchar_nokey
WHERE innr.col_int_key <> innr.pk OR innr.pk = 9
) AND
outr.pk < 7 XOR outr.col_varchar_nokey <> 'i'
ORDER BY outr.col_varchar_key, outr.pk;
x
13
3
5
6
9
19
20
15
1
4
12
16
17
11
10
8
2
18
14
7
DROP TABLE t1, t2, t3, t4;
# Bug#19811762: Assert fail in JOIN::propagate_dependencies
CREATE TABLE t1 (
pk int NOT NULL
);
CREATE TABLE t2 (
pk int NOT NULL,
col_int_key int DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
CREATE TABLE t3 (
pk int NOT NULL AUTO_INCREMENT,
col_int_nokey int DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
EXPLAIN SELECT table1.pk
FROM   t1 AS table1
RIGHT JOIN
t2 AS table2
LEFT OUTER JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1 INNER JOIN t3 AS sq2_t2
ON sq2_t2.col_int_nokey = sq2_t1.col_int_key
WHERE sq2_t2.col_varchar_nokey <= sq2_t1.col_varchar_key OR
sq2_t2.col_int_nokey <> 2
) AS table3
ON table3.col_int_key = table2.col_int_key
ON table3.pk = table2.col_int_key
WHERE table3.pk >= 6 OR
table1.pk > 68 AND
table1.pk < ( 68 + 76 );
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
Warnings:
Note	1003	/* select#1 */ select NULL AS `pk` from `test`.`t2` `table2` left join (`test`.`t2` `sq2_t1` join `test`.`t3` `sq2_t2`) on((((`test`.`sq2_t2`.`col_varchar_nokey` <= `test`.`sq2_t1`.`col_varchar_key`) or (`test`.`sq2_t2`.`col_int_nokey` <> 2)) and multiple equal(`test`.`sq2_t1`.`col_int_key`, NULL, `test`.`sq2_t2`.`col_int_nokey`))) where ((`test`.`sq2_t1`.`pk` >= 6) or ((NULL > 68) and (NULL < (68 + 76))))
SELECT table1.pk
FROM   t1 AS table1
RIGHT JOIN
t2 AS table2
LEFT OUTER JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1 INNER JOIN t3 AS sq2_t2
ON sq2_t2.col_int_nokey = sq2_t1.col_int_key
WHERE sq2_t2.col_varchar_nokey <= sq2_t1.col_varchar_key OR
sq2_t2.col_int_nokey <> 2
) AS table3
ON table3.col_int_key = table2.col_int_key
ON table3.pk = table2.col_int_key
WHERE table3.pk >= 6 OR
table1.pk > 68 AND
table1.pk < ( 68 + 76 );
pk
DROP TABLE t1, t2, t3;
#
# Bug#19793998 ASSERTION FAILED: ROWS >= 0.0 IN
#              HANDLER::INDEX_SCAN_COST()
#
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
CREATE TABLE t1 (
pk INTEGER PRIMARY KEY
);
INSERT INTO t1 VALUES (0),(1),(2);
CREATE TABLE t2 (
pk INTEGER PRIMARY KEY
);
INSERT INTO t2 VALUES (0),(1),(2);
explain SELECT SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a) FROM t1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	index	NULL	PRIMARY	4	NULL	3	100.00	Using index
2	SUBQUERY	<derived3>	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	NULL
3	DERIVED	t2	NULL	index	NULL	PRIMARY	4	NULL	3	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select <in_optimizer>(sha(`test`.`t1`.`pk`),sha(`test`.`t1`.`pk`) in ( <materialize> (/* select#2 */ select `` from (/* select#3 */ select '' AS `` from `test`.`t2`) `a` where true ), <primary_index_lookup>(sha(`test`.`t1`.`pk`) in <temporary table> on <auto_distinct_key> where ((sha(`test`.`t1`.`pk`) = ``))))) AS `SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a)` from `test`.`t1`
SELECT SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a) FROM t1;
SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a)
0
0
0
DROP TABLE t1, t2;
SET @@optimizer_switch= @optimizer_switch_saved;
# Bug#20073930 Assert fail in store_top_level_join_columns
CREATE TABLE t1 (
pk int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk)
) engine=innodb;
CREATE TABLE t2 (
pk int NOT NULL,
col_int_key int NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) engine=innodb;
CREATE TABLE t3 (
pk int NOT NULL,
PRIMARY KEY (pk)
) engine=innodb;
CREATE TABLE t4 (
pk int NOT NULL ,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk)
) engine=innodb;
explain SELECT table2.pk AS field2
FROM (SELECT sq1_t2.pk
FROM t1 AS sq1_t1
JOIN
(t1 AS sq1_t2 RIGHT JOIN t2 AS sq1_t3
ON sq1_t3.pk = sq1_t2.pk
)
ON sq1_t3.col_int_key = sq1_t2.pk AND
sq1_t1.col_varchar_key IN
(SELECT child_sq1_t2.col_varchar_key AS child_sq1_field1
FROM t1 AS child_sq1_t2
)
) AS table1
LEFT JOIN
t1 AS table2
JOIN
(SELECT sq2_t1.* FROM t1 AS sq2_t1) AS table3
ON table3.col_varchar_key = table2.col_varchar_key 
ON table3.col_varchar_key = table2.col_varchar_key;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	sq1_t1	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	NULL
1	SIMPLE	sq1_t2	NULL	index	PRIMARY	PRIMARY	4	NULL	1	100.00	Using where; Using index; Using join buffer (Block Nested Loop)
1	SIMPLE	sq1_t3	NULL	eq_ref	PRIMARY,col_int_key	PRIMARY	4	test.sq1_t2.pk	1	100.00	Using where
1	SIMPLE	child_sq1_t2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where; FirstMatch(sq1_t3); Using join buffer (Block Nested Loop)
1	SIMPLE	table2	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using join buffer (Block Nested Loop)
1	SIMPLE	sq2_t1	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`table2`.`pk` AS `field2` from `test`.`t1` `sq1_t1` join `test`.`t2` `sq1_t3` join `test`.`t1` `sq1_t2` semi join (`test`.`t1` `child_sq1_t2`) left join (`test`.`t1` `table2` join `test`.`t1` `sq2_t1`) on(((`test`.`sq2_t1`.`col_varchar_key` = `test`.`table2`.`col_varchar_key`))) where ((`test`.`child_sq1_t2`.`col_varchar_key` = `test`.`sq1_t1`.`col_varchar_key`) and (`test`.`sq1_t3`.`col_int_key` = `test`.`sq1_t2`.`pk`) and (`test`.`sq1_t3`.`pk` = `test`.`sq1_t2`.`pk`))
SELECT table2.pk AS field2
FROM (SELECT sq1_t2.pk
FROM t1 AS sq1_t1
JOIN
(t1 AS sq1_t2 RIGHT JOIN t2 AS sq1_t3
ON sq1_t3.pk = sq1_t2.pk
)
ON sq1_t3.col_int_key = sq1_t2.pk AND
sq1_t1.col_varchar_key IN
(SELECT child_sq1_t2.col_varchar_key AS child_sq1_field1
FROM t1 AS child_sq1_t2
)
) AS table1
LEFT JOIN
t1 AS table2
JOIN
(SELECT sq2_t1.* FROM t1 AS sq2_t1) AS table3
ON table3.col_varchar_key = table2.col_varchar_key 
ON table3.col_varchar_key = table2.col_varchar_key;
field2
DROP TABLE t1, t2, t3, t4;
# Bug#20118755 Assert fail in JOIN::propagate_dependencies
CREATE TABLE t1 (
pk int NOT NULL ,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
CREATE TABLE t2 (
pk int NOT NULL,
col_int_nokey int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
explain SELECT table1.pk AS field1,
table2.pk field2
FROM (SELECT sq1_t1.*
FROM t1 AS sq1_t1
) AS table1
RIGHT JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1
WHERE sq2_t1.col_int_key NOT IN
(SELECT child_sq1_t1.col_int_key AS child_sq2_field1
FROM t2 AS child_sq1_t1
)
) AS table2
RIGHT JOIN t2 AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.col_varchar_nokey = table2.col_varchar_key;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
4	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Not optimized, outer query is empty
Warnings:
Note	1003	/* select#1 */ select `test`.`sq1_t1`.`pk` AS `field1`,`test`.`sq2_t1`.`pk` AS `field2` from `test`.`t2` `table3` left join (`test`.`t2` `sq2_t1`) on((<in_optimizer>(`test`.`sq2_t1`.`col_int_key`,<exists>(/* select#4 */ select `test`.`child_sq1_t1`.`col_int_key` AS `child_sq2_field1` from `test`.`t2` `child_sq1_t1` where <if>(outer_field_is_not_null, ((<cache>(`test`.`sq2_t1`.`col_int_key`) = `test`.`child_sq1_t1`.`col_int_key`) or (`test`.`child_sq1_t1`.`col_int_key` is null)), true) having <if>(outer_field_is_not_null, <is_not_null_test>(`test`.`child_sq1_t1`.`col_int_key`), true)) is false) and multiple equal(NULL, `test`.`sq2_t1`.`col_varchar_key`))) left join (`test`.`t1` `sq1_t1`) on(multiple equal(NULL, `test`.`sq2_t1`.`col_varchar_key`))
SELECT table1.pk AS field1,
table2.pk field2
FROM (SELECT sq1_t1.*
FROM t1 AS sq1_t1
) AS table1
RIGHT JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1
WHERE sq2_t1.col_int_key NOT IN
(SELECT child_sq1_t1.col_int_key AS child_sq2_field1
FROM t2 AS child_sq1_t1
)
) AS table2
RIGHT JOIN t2 AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.col_varchar_nokey = table2.col_varchar_key;
field1	field2
DROP TABLE t1, t2;
# Bug#20073366 Assert fail in
#              Optimize_table_order::Optimize_straight_join
CREATE TABLE t1 (
pk int NOT NULL,
col_int_nokey int DEFAULT NULL,
col_int_key int 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)
) charset utf8mb4;
CREATE TABLE t2 (
pk int NOT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
) charset utf8mb4;
CREATE TABLE t3 (
pk int NOT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
) charset utf8mb4;
explain SELECT STRAIGHT_JOIN alias1.col_date_key AS field1
FROM t1 AS alias1
INNER JOIN
((SELECT  sq1_alias1.col_varchar_key
FROM t1 AS sq1_alias1 RIGHT OUTER JOIN t2 AS sq1_alias2
ON sq1_alias2.pk = sq1_alias1.col_int_key
WHERE ('n', 'l') IN
(SELECT
c_sq1_alias1.col_varchar_nokey AS c_sq1_field1,
c_sq1_alias1.col_varchar_key AS c_sq1_field2
FROM t3 AS c_sq1_alias1
INNER JOIN
(t1 AS c_sq1_alias2
INNER JOIN t1 AS c_sq1_alias3
ON c_sq1_alias3.col_varchar_key = c_sq1_alias2.col_varchar_key
)
ON c_sq1_alias3.pk = c_sq1_alias2.pk
WHERE c_sq1_alias3.col_int_nokey <> c_sq1_alias2.col_int_nokey
) AND
sq1_alias2.col_varchar_key = 't'
       ) AS alias2
INNER JOIN t3 AS alias3
ON alias3.col_varchar_nokey = alias2.col_varchar_key
)
ON alias3.col_varchar_key = alias2.col_varchar_key;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
Warnings:
Note	1003	/* select#1 */ select straight_join NULL AS `field1` from `test`.`t1` `alias1` join (/* select#2 */ select NULL AS `col_varchar_key` from `test`.`t2` `sq1_alias2` semi join (`test`.`t3` `c_sq1_alias1` join `test`.`t1` `c_sq1_alias2` join `test`.`t1` `c_sq1_alias3`) where ((`test`.`c_sq1_alias3`.`col_int_nokey` <> `test`.`c_sq1_alias2`.`col_int_nokey`) and multiple equal('t', NULL) and multiple equal('n', `test`.`c_sq1_alias1`.`col_varchar_nokey`) and multiple equal('l', `test`.`c_sq1_alias1`.`col_varchar_key`) and multiple equal(`test`.`c_sq1_alias3`.`pk`, `test`.`c_sq1_alias2`.`pk`) and multiple equal(`test`.`c_sq1_alias3`.`col_varchar_key`, `test`.`c_sq1_alias2`.`col_varchar_key`))) `alias2` join `test`.`t3` `alias3` where multiple equal(`test`.`alias3`.`col_varchar_key`, `alias2`.`col_varchar_key`, `test`.`alias3`.`col_varchar_nokey`)
SELECT STRAIGHT_JOIN alias1.col_date_key AS field1
FROM t1 AS alias1
INNER JOIN
((SELECT  sq1_alias1.col_varchar_key
FROM t1 AS sq1_alias1 RIGHT OUTER JOIN t2 AS sq1_alias2
ON sq1_alias2.pk = sq1_alias1.col_int_key
WHERE ('n', 'l') IN
(SELECT
c_sq1_alias1.col_varchar_nokey AS c_sq1_field1,
c_sq1_alias1.col_varchar_key AS c_sq1_field2
FROM t3 AS c_sq1_alias1
INNER JOIN
(t1 AS c_sq1_alias2
INNER JOIN t1 AS c_sq1_alias3
ON c_sq1_alias3.col_varchar_key = c_sq1_alias2.col_varchar_key
)
ON c_sq1_alias3.pk = c_sq1_alias2.pk
WHERE c_sq1_alias3.col_int_nokey <> c_sq1_alias2.col_int_nokey
) AND
sq1_alias2.col_varchar_key = 't'
       ) AS alias2
INNER JOIN t3 AS alias3
ON alias3.col_varchar_nokey = alias2.col_varchar_key
)
ON alias3.col_varchar_key = alias2.col_varchar_key;
field1
DROP TABLE t1, t2, t3;
# Bug#20204415 Assertion failure in TABLE_LIST::set_merged()
CREATE TABLE t(a INTEGER);
CREATE VIEW v AS SELECT * FROM t;
SET optimizer_switch='derived_merge=off';
PREPARE s1 FROM 'SELECT * FROM v';
PREPARE s2 FROM 'SELECT * FROM (SELECT * FROM t) AS dt';
SET optimizer_switch='derived_merge=on';
EXECUTE s1;
a
EXECUTE s2;
a
DEALLOCATE PREPARE s1;
DEALLOCATE PREPARE s2;
DROP VIEW v;
DROP TABLE t;
# Bug#20487336 Assert length > 0 && keyparts != 0 in calc_length_and_key
CREATE TABLE t1
(pk INTEGER PRIMARY KEY,
col_int_nokey INTEGER,
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(1),
KEY col_varchar_key(col_varchar_key)
) charset utf8mb4 engine=innodb;
INSERT INTO t1 (pk) VALUES
(1), (2), (3), (4), (5), (6), (7), (8), (9), (10),
(11), (12), (13), (14), (15), (16), (17), (18), (19), (20);
CREATE TABLE t2
(pk INTEGER PRIMARY KEY,
col_varchar_key VARCHAR(1),
KEY col_varchar_key(col_varchar_key)
) charset utf8mb4 engine=innodb;
INSERT INTO t2 (pk) VALUES
(1), (2), (3), (4), (5), (6), (7), (8), (9), (10),
(11), (12), (13), (14), (15), (16), (17), (18), (19), (20);
CREATE TABLE t3
(pk INTEGER PRIMARY KEY,
col_varchar_key VARCHAR(1),
KEY col_varchar_key(col_varchar_key)
) charset utf8mb4 engine=innodb;
INSERT INTO t3 (pk) VALUES
(1), (2);
ANALYZE TABLE t1, t2, t3;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
test.t2	analyze	status	OK
test.t3	analyze	status	OK
explain SELECT MIN(alias1.col_varchar_nokey) AS field1
FROM (SELECT sq1_alias1.*
FROM t1 AS sq1_alias1, t1 AS sq1_alias2
WHERE sq1_alias1.col_varchar_nokey IN
(SELECT c_sq1_alias2.col_varchar_key AS c_sq1_field1
FROM t1 AS c_sq1_alias1 INNER JOIN
t1 AS c_sq1_alias2
ON c_sq1_alias2.col_varchar_nokey = c_sq1_alias1.col_varchar_key
WHERE c_sq1_alias1.col_int_nokey <> c_sq1_alias1.col_int_nokey
) AND
sq1_alias2.pk = sq1_alias1.pk
) AS alias1,
(SELECT sq2_alias1.*
FROM t2 AS sq2_alias1 RIGHT JOIN
t3 AS sq2_alias2
ON sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key
) AS alias2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	sq2_alias2	NULL	index	NULL	col_varchar_key	7	NULL	2	100.00	Using index
1	SIMPLE	<subquery3>	NULL	ALL	NULL	NULL	NULL	NULL	NULL	100.00	Using join buffer (Block Nested Loop)
1	SIMPLE	sq1_alias1	NULL	ALL	PRIMARY	NULL	NULL	NULL	20	10.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	sq1_alias2	NULL	eq_ref	PRIMARY	PRIMARY	4	test.sq1_alias1.pk	1	100.00	Using index
1	SIMPLE	sq2_alias1	NULL	ref	col_varchar_key	col_varchar_key	7	test.sq2_alias2.col_varchar_key	20	100.00	Using index
3	MATERIALIZED	c_sq1_alias1	NULL	ALL	col_varchar_key	NULL	NULL	NULL	20	90.00	Using where
3	MATERIALIZED	c_sq1_alias2	NULL	ALL	col_varchar_key	NULL	NULL	NULL	20	10.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select min(`test`.`sq1_alias1`.`col_varchar_nokey`) AS `field1` from `test`.`t1` `sq1_alias1` join `test`.`t1` `sq1_alias2` semi join (`test`.`t1` `c_sq1_alias1` join `test`.`t1` `c_sq1_alias2`) join `test`.`t3` `sq2_alias2` left join `test`.`t2` `sq2_alias1` on((`test`.`sq2_alias1`.`col_varchar_key` = `test`.`sq2_alias2`.`col_varchar_key`)) where ((`test`.`c_sq1_alias2`.`col_varchar_nokey` = `test`.`c_sq1_alias1`.`col_varchar_key`) and (`test`.`sq1_alias1`.`col_varchar_nokey` = `<subquery3>`.`c_sq1_field1`) and (`test`.`sq1_alias2`.`pk` = `test`.`sq1_alias1`.`pk`) and (`test`.`c_sq1_alias1`.`col_int_nokey` <> `test`.`c_sq1_alias1`.`col_int_nokey`))
SELECT MIN(alias1.col_varchar_nokey) AS field1
FROM (SELECT sq1_alias1.*
FROM t1 AS sq1_alias1, t1 AS sq1_alias2
WHERE sq1_alias1.col_varchar_nokey IN
(SELECT c_sq1_alias2.col_varchar_key AS c_sq1_field1
FROM t1 AS c_sq1_alias1 INNER JOIN
t1 AS c_sq1_alias2
ON c_sq1_alias2.col_varchar_nokey = c_sq1_alias1.col_varchar_key
WHERE c_sq1_alias1.col_int_nokey <> c_sq1_alias1.col_int_nokey
) AND
sq1_alias2.pk = sq1_alias1.pk
) AS alias1,
(SELECT sq2_alias1.*
FROM t2 AS sq2_alias1 RIGHT JOIN
t3 AS sq2_alias2
ON sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key
) AS alias2;
field1
NULL
DROP TABLE t1, t2, t3;
#
# Bug #18607971 : 5.5 TO 5.6 REGRESSION WITH A SUBQUERY IN THE FROM
#                 CLAUSE.
#
CREATE TABLE t(id INT PRIMARY KEY,
c1 INT, c2 INT, key(c2)) engine=InnoDB;
INSERT INTO t(id, c1, c2) VALUES(1, 2, 3), (2, 3, 4), (3, 3, 4), (4, 3, 4);
ANALYZE TABLE t;
Table	Op	Msg_type	Msg_text
test.t	analyze	status	OK
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3
GROUP BY t1.c1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where
2	DERIVED	t2	NULL	index	NULL	c2	5	NULL	4	100.00	Using index; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t1.id, t2.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t2	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3 AND t2.c2= 3
GROUP BY t1.c1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t2	NULL	ref	c2	c2	5	const	1	100.00	Using index
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3 AND t2.c2= 3
GROUP BY t1.c1, t2.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t2	NULL	ref	c2	c2	5	const	1	100.00	Using index
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3 AND t2.c2= 3
GROUP BY t1.c1, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using join buffer (Block Nested Loop)
2	DERIVED	t2	NULL	ref	c2	c2	5	const	1	100.00	Using index; Using temporary
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `a`.`c1` AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`c1` AS `c1` from `test`.`t` `t1` join `test`.`t` `t2` where ((`test`.`t2`.`c2` = 3) and (`test`.`t1`.`c1` = 3)) group by `test`.`t1`.`c1`,`test`.`t1`.`id`) `a` join `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.c1
GROUP BY t2.c1, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t2	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t2.c1, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t2	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t2.c2, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t2	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t1.id, t2.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t2	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 INNER JOIN t t3 ON t1.id=1 AND t1.c1=t2.id AND t2.c1=t3.id
GROUP BY t1.id, t2.c2, t3.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t2	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
2	DERIVED	t3	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT DISTINCT t1.id
FROM t t1
WHERE t1.id= 1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id + 1
FROM t t1 INNER JOIN t t2 ON t1.id= 1
GROUP BY t1.id + 1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	Using index
2	DERIVED	t2	NULL	index	NULL	c2	5	NULL	4	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select '2' AS `t1.id + 1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3
GROUP BY 1.5) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where
2	DERIVED	t2	NULL	index	NULL	c2	5	NULL	4	100.00	Using index; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON mod(t1.id,1000)= 1
GROUP BY t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	16	100.00	Using join buffer (Block Nested Loop)
2	DERIVED	t1	NULL	index	PRIMARY,c2	c2	5	NULL	4	100.00	Using where; Using index; Using temporary
2	DERIVED	t2	NULL	index	NULL	c2	5	NULL	4	100.00	Using index; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `a`.`id` AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`id` AS `id` from `test`.`t` `t1` join `test`.`t` `t2` where ((`test`.`t1`.`id` % 1000) = 1) group by `test`.`t1`.`id`) `a` join `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id + 1
FROM t t1 INNER JOIN t t2 ON t1.id + 1= 2
GROUP BY t1.id + 1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	b	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t1	NULL	index	PRIMARY,c2	c2	5	NULL	4	100.00	Using where; Using index
2	DERIVED	t2	NULL	index	NULL	c2	5	NULL	4	100.00	Using index; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select '2' AS `t1.id + 1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
CREATE VIEW v1 AS SELECT c1 a FROM t WHERE c1 = 3;
CREATE VIEW v2 AS SELECT c2 b FROM t WHERE c2 > 3;
EXPLAIN SELECT * FROM (SELECT v1.a
FROM v1 LEFT OUTER JOIN v2 ON v1.a = v2.b
GROUP BY v1.a) p, t q
WHERE q.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	q	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where
2	DERIVED	t	NULL	ref	c2	c2	5	const	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select '3' AS `a`,`test`.`q`.`id` AS `id`,`test`.`q`.`c1` AS `c1`,`test`.`q`.`c2` AS `c2` from `test`.`t` `q` where (`test`.`q`.`id` between 1 and 10)
DROP VIEW v1;
CREATE VIEW v1 AS SELECT c1 a FROM t;
EXPLAIN SELECT * FROM (SELECT v1.a
FROM v1 LEFT OUTER JOIN v2 ON v1.a = v2.b AND v1.a = 10
GROUP BY v1.a) p, t q
WHERE q.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	q	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	8	100.00	Using join buffer (Block Nested Loop)
2	DERIVED	t	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using temporary
2	DERIVED	t	NULL	ref	c2	c2	5	const	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `p`.`a` AS `a`,`test`.`q`.`id` AS `id`,`test`.`q`.`c1` AS `c1`,`test`.`q`.`c2` AS `c2` from (/* select#2 */ select `test`.`t`.`c1` AS `a` from `test`.`t` left join (`test`.`t`) on(((`test`.`t`.`c1` = 10) and (`test`.`t`.`c2` = 10) and (10 > 3))) where true group by `test`.`t`.`c1`) `p` join `test`.`t` `q` where (`test`.`q`.`id` between 1 and 10)
EXPLAIN SELECT * FROM (SELECT v1.a
FROM v1 LEFT OUTER JOIN v2 ON v1.a = v2.b
WHERE v1.a = 3
GROUP BY v1.a) p, t q
WHERE q.id BETWEEN 1 AND 10;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
1	PRIMARY	q	NULL	range	PRIMARY	PRIMARY	4	NULL	4	100.00	Using where
2	DERIVED	t	NULL	ALL	NULL	NULL	NULL	NULL	4	25.00	Using where
2	DERIVED	t	NULL	ref	c2	c2	5	const	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select '3' AS `a`,`test`.`q`.`id` AS `id`,`test`.`q`.`c1` AS `c1`,`test`.`q`.`c2` AS `c2` from `test`.`t` `q` where (`test`.`q`.`id` between 1 and 10)
DROP VIEW v1, v2;
DROP TABLE t;
# Bug #20443457 : Assert fail in calc_length_and_keyparts
CREATE TABLE t1(
pk INTEGER PRIMARY KEY,
k INTEGER,
KEY k(k),
nk INTEGER);
INSERT INTO t1 VALUES(1, 10, 100), (2, 20, 200);
set @optimizer_switch_saved=@@optimizer_switch;
set @@optimizer_switch='firstmatch=off';
explain SELECT t1.k
FROM t1 RIGHT JOIN
(SELECT t2.*
FROM t1 AS t2 JOIN t1 AS t3
ON TRUE
WHERE t3.k IN (SELECT k FROM t1 AS t4 WHERE k>1)
) AS dt
ON t1.pk = dt.pk;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	NULL	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
1	SIMPLE	t1	NULL	eq_ref	PRIMARY	PRIMARY	4	test.t2.pk	1	100.00	NULL
1	SIMPLE	t4	NULL	index	k	k	5	NULL	2	100.00	Using where; Using index; LooseScan
1	SIMPLE	t3	NULL	index	k	k	5	NULL	2	100.00	Using where; Using index; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`k` AS `k` from `test`.`t1` `t2` join `test`.`t1` `t3` semi join (`test`.`t1` `t4`) left join `test`.`t1` on((`test`.`t1`.`pk` = `test`.`t2`.`pk`)) where ((`test`.`t3`.`k` = `test`.`t4`.`k`) and (`test`.`t4`.`k` > 1))
SELECT t1.k
FROM t1 RIGHT JOIN
(SELECT t2.*
FROM t1 AS t2 JOIN t1 AS t3
ON TRUE
WHERE t3.k IN (SELECT k FROM t1 AS t4 WHERE k>1)
) AS dt
ON t1.pk = dt.pk;
k
10
10
20
20
SET @@optimizer_switch=@optimizer_switch_saved;
DROP TABLE t1;
# Bug#20733540: Assertion failed: !table || (!table->read_set ...)
CREATE TABLE t1(a INTEGER, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'a');
CREATE TABLE t2(c INTEGER);
INSERT INTO t2 VALUES(0);
SELECT 1
FROM (SELECT b FROM t1 WHERE a) AS dt1
RIGHT JOIN t2
ON c NOT BETWEEN 1 AND 2
NATURAL JOIN t1 AS t3;
1
1
DROP TABLE t1, t2;
# Bug#21512842: Sig 11 in check_column_grant_in_table_ref
CREATE TABLE t1 (
pk INTEGER,
col_varchar JSON NOT NULL,
PRIMARY KEY (pk)
);
CREATE TABLE t2 (
pk INTEGER,
col_date_key DATE NOT NULL,
PRIMARY KEY (pk)
);
set sql_mode='';
SELECT *
FROM (SELECT alias2.pk AS field1
FROM t1 AS alias1
LEFT OUTER JOIN t2 AS alias2
ON JSON_UNQUOTE(JSON_EXTRACT(alias1.col_varchar,'$.varc'))
COLLATE utf8mb4_general_ci = alias2.col_date_key
GROUP BY JSON_QUOTE(JSON_EXTRACT(field1,'$.intc'))
) AS dt;
field1
set sql_mode=default;
DROP TABLE t1, t2;
# Bug#21350125: Wrong results when ORDER BY is removed
CREATE TABLE t1 (
c1n varchar(1) NOT NULL,
c1k varchar(2) DEFAULT NULL,
KEY c1k (c1k)
);
INSERT INTO t1 VALUES ('j','jj'),('r','rr');
CREATE TABLE t2 (
c2k varchar(1) NOT NULL,
c2n varchar(2) DEFAULT NULL,
KEY c2k (c2k)
);
INSERT INTO t2 VALUES
('f','ff'),('t','tt'),('c','cc'),('c','cc'),('r','rr'),('k','kk');
CREATE TABLE `empty` (dummy INTEGER);
CREATE VIEW vr AS
SELECT t2.c2n AS v_field
FROM t1 RIGHT JOIN t2
ON t2.c2k = t1.c1k;
CREATE VIEW vl AS
SELECT t2.c2n AS v_field
FROM t2 LEFT JOIN t1
ON t2.c2k = t1.c1k;
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN t2
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
prepare s from 'SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN t2
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field';
execute s;
field1
ff
tt
cc
cc
cc
cc
rr
kk
deallocate prepare s;
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t2 LEFT JOIN t1
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
prepare s from 'SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t2 LEFT JOIN t1
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field';
execute s;
field1
ff
tt
cc
cc
cc
cc
rr
kk
deallocate prepare s;
SELECT alias1.v_field AS field1
FROM vl AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.v_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
SELECT alias1.v_field AS field1
FROM vr AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.v_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN
(`empty` RIGHT JOIN t2
ON TRUE)
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN
(t2 LEFT JOIN `empty`
              ON TRUE)
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
DROP VIEW vl, vr;
DROP TABLE t1, t2, `empty`;
# Bug#22239474: Unexpected error 1093 on nested subquery for update
CREATE TABLE t1 (id INTEGER PRIMARY KEY, d INTEGER);
INSERT INTO t1 VALUES(1, 10), (2, 20);
explain DELETE FROM t1
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	DELETE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	DEPENDENT SUBQUERY	<derived3>	NULL	index_subquery	<auto_key0>	<auto_key0>	4	func	2	100.00	Using index
3	DERIVED	t1	NULL	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
Warnings:
Note	1003	delete from `test`.`t1` where <in_optimizer>(`test`.`t1`.`id`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`id`) in dt on <auto_key0>)))
DELETE FROM t1
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
INSERT INTO t1 VALUES(1, 10), (2, 20);
explain UPDATE t1 SET d= NULL
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	UPDATE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	DEPENDENT SUBQUERY	<derived3>	NULL	index_subquery	<auto_key0>	<auto_key0>	4	func	2	100.00	Using index
3	DERIVED	t1	NULL	index	NULL	PRIMARY	4	NULL	2	100.00	Using index
Warnings:
Note	1003	update `test`.`t1` set `test`.`t1`.`d` = NULL where <in_optimizer>(`test`.`t1`.`id`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`id`) in dt on <auto_key0>)))
UPDATE t1 SET d= NULL
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
explain INSERT INTO t1 SELECT id+10, d FROM t1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	INSERT	t1	NULL	ALL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
Warnings:
Note	1003	insert into `test`.`t1` /* select#1 */ select sql_buffer_result (`test`.`t1`.`id` + 10) AS `id+10`,`test`.`t1`.`d` AS `d` from `test`.`t1`
INSERT INTO t1 SELECT id+10, d FROM t1;
explain INSERT INTO t1 SELECT id+20, d FROM (SELECT * FROM t1) AS dt;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	INSERT	t1	NULL	ALL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	4	100.00	Using temporary
Warnings:
Note	1003	insert into `test`.`t1` /* select#1 */ select sql_buffer_result (`test`.`t1`.`id` + 20) AS `id+20`,`test`.`t1`.`d` AS `d` from `test`.`t1`
INSERT INTO t1 SELECT id+20, d FROM (SELECT * FROM t1) AS dt;
DROP TABLE t1;
# Bug#22223202: Query with double nested subquery much slower in 5.7
CREATE TABLE t1 (
t1_rowid bigint unsigned NOT NULL,
t1_co varchar(1) NOT NULL,
t1_inv_date char(3) NOT NULL,
UNIQUE KEY rowid (t1_rowid),
KEY invdate (t1_co, t1_inv_date)
) charset latin1;
INSERT INTO t1 VALUES (505975,'D','s:1'),(505981,'D','s:1'),(505869,'D','s:3');
CREATE TABLE t2 (
t2_rowid bigint unsigned NOT NULL,
t2_end_date char(3) NOT NULL,
UNIQUE KEY rowid (t2_rowid),
KEY end_date (t2_end_date)
) charset latin1;
INSERT INTO t2 VALUES (9,'_:L'), (10,'_<2'), (11,'_<N');
explain SELECT t1_inv_date
FROM t1 LEFT JOIN
(SELECT curr.t2_end_date As end_date,
(SELECT prev.t2_end_date
FROM t2 AS prev
WHERE prev.t2_end_date < curr.t2_end_date
ORDER BY prev.t2_end_date DESC LIMIT 1) AS prev_end_date
FROM t2 AS curr
WHERE curr.t2_end_date >= 's:1'
     ) AS periods
ON periods.prev_end_date < t1_inv_date AND
periods.end_date >= t1_inv_date;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	index	NULL	invdate	6	NULL	3	100.00	Using index
1	PRIMARY	<derived2>	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (Block Nested Loop)
2	DERIVED	curr	NULL	index	end_date	end_date	3	NULL	3	100.00	Using where; Using index
3	DEPENDENT SUBQUERY	prev	NULL	index	end_date	end_date	3	NULL	1	33.33	Using where; Backward index scan; Using index
Warnings:
Note	1276	Field or reference 'test.curr.t2_end_date' of SELECT #3 was resolved in SELECT #2
Note	1003	/* select#1 */ select `test`.`t1`.`t1_inv_date` AS `t1_inv_date` from `test`.`t1` left join (/* select#2 */ select `test`.`curr`.`t2_end_date` AS `end_date`,(/* select#3 */ select `test`.`prev`.`t2_end_date` from `test`.`t2` `prev` where (`test`.`prev`.`t2_end_date` < `test`.`curr`.`t2_end_date`) order by `test`.`prev`.`t2_end_date` desc limit 1) AS `prev_end_date` from `test`.`t2` `curr` where (`test`.`curr`.`t2_end_date` >= 's:1')) `periods` on(((`periods`.`prev_end_date` < `test`.`t1`.`t1_inv_date`) and (`periods`.`end_date` >= `test`.`t1`.`t1_inv_date`))) where true
SELECT t1_inv_date
FROM t1 LEFT JOIN
(SELECT curr.t2_end_date As end_date,
(SELECT prev.t2_end_date
FROM t2 AS prev
WHERE prev.t2_end_date < curr.t2_end_date
ORDER BY prev.t2_end_date DESC LIMIT 1) AS prev_end_date
FROM t2 AS curr
WHERE curr.t2_end_date >= 's:1'
     ) AS periods
ON periods.prev_end_date < t1_inv_date AND
periods.end_date >= t1_inv_date;
t1_inv_date
s:1
s:1
s:3
explain SELECT /*+ MERGE(periods) */ t1_inv_date
FROM t1 LEFT JOIN
(SELECT curr.t2_end_date As end_date,
(SELECT prev.t2_end_date
FROM t2 AS prev
WHERE prev.t2_end_date < curr.t2_end_date
ORDER BY prev.t2_end_date DESC LIMIT 1) AS prev_end_date
FROM t2 AS curr
WHERE curr.t2_end_date >= 's:1'
     ) AS periods
ON periods.prev_end_date < t1_inv_date AND
periods.end_date >= t1_inv_date;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	NULL	index	NULL	invdate	6	NULL	3	100.00	Using index
1	PRIMARY	curr	NULL	index	end_date	end_date	3	NULL	3	100.00	Using where; Using index; Using join buffer (Block Nested Loop)
3	DEPENDENT SUBQUERY	prev	NULL	index	end_date	end_date	3	NULL	1	33.33	Using where; Backward index scan; Using index
Warnings:
Note	1276	Field or reference 'test.curr.t2_end_date' of SELECT #3 was resolved in SELECT #2
Note	1003	/* select#1 */ select /*+ MERGE(`periods`@`select#1`) */ `test`.`t1`.`t1_inv_date` AS `t1_inv_date` from `test`.`t1` left join (`test`.`t2` `curr`) on((((/* select#3 */ select `test`.`prev`.`t2_end_date` from `test`.`t2` `prev` where (`test`.`prev`.`t2_end_date` < `test`.`curr`.`t2_end_date`) order by `test`.`prev`.`t2_end_date` desc limit 1) < `test`.`t1`.`t1_inv_date`) and (`test`.`curr`.`t2_end_date` >= `test`.`t1`.`t1_inv_date`) and (`test`.`curr`.`t2_end_date` >= 's:1'))) where true
SELECT /*+ MERGE(periods) */ t1_inv_date
FROM t1 LEFT JOIN
(SELECT curr.t2_end_date As end_date,
(SELECT prev.t2_end_date
FROM t2 AS prev
WHERE prev.t2_end_date < curr.t2_end_date
ORDER BY prev.t2_end_date DESC LIMIT 1) AS prev_end_date
FROM t2 AS curr
WHERE curr.t2_end_date >= 's:1'
     ) AS periods
ON periods.prev_end_date < t1_inv_date AND
periods.end_date >= t1_inv_date;
t1_inv_date
s:1
s:1
s:3
DROP TABLE t1, t2;
# Bug#22176604: Wrong result on outer join with uncorrelated subquery
CREATE TABLE t1 (a INT, KEY(a));
INSERT INTO t1 VALUES  (1), (NULL);
CREATE TABLE t2 (b INT, KEY(b));
INSERT INTO t2 VALUES (7), (NULL), (1), (5), (8), (6), (4), (0), (3), (NULL);
CREATE TABLE t3 (c INT);
INSERT INTO t3 VALUES (NULL), (1), (5);
explain SELECT * FROM t1 LEFT JOIN (
SELECT t3.* FROM t2 INNER JOIN t3 ON b = c
) AS sq ON a <= sq.c;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	index	NULL	a	5	NULL	2	100.00	Using index
1	SIMPLE	t3	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
1	SIMPLE	t2	NULL	ref	b	b	5	test.t3.c	2	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t3`.`c` AS `c` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t2`.`b` = `test`.`t3`.`c`) and (`test`.`t1`.`a` <= `test`.`t3`.`c`))) where true
SELECT * FROM t1 LEFT JOIN (
SELECT t3.* FROM t2 INNER JOIN t3 ON b = c
) AS sq ON a <= sq.c;
a	c
NULL	NULL
1	1
1	5
DROP TABLE t1, t2, t3;
# Bug#22343301: Error 1093 (HY000): You can't specify target table'.'
#               for update in FROM clause
CREATE TABLE users (
id int unsigned AUTO_INCREMENT,
name varchar(255),
position int DEFAULT NULL,
PRIMARY KEY (id));
INSERT INTO users (name, position) VALUES
('user1','1'), ('user2','2'), ('user3','3'), ('user4','4'), ('user5','5');
# Single-table update with non-mergeable derived table
UPDATE users
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT DISTINCT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
# Single-table update with mergeable derived table
# (but not merged due to being used in a subquery of an UPDATE statement)
UPDATE users
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
# Multi-table update with non-mergeable derived table
UPDATE users, (SELECT 1) AS dummy
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT DISTINCT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
# Multi-table update with mergeable derived table
UPDATE users, (SELECT 1) AS dummy
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
UPDATE users
SET position = (SELECT COUNT(t2.position) + 1
FROM users AS t2
WHERE t2.position < users.position)
WHERE id = 3;
ERROR HY000: You can't specify target table 'users' for update in FROM clause
UPDATE users, (SELECT 1) AS dummy
SET position = (SELECT COUNT(t2.position) + 1
FROM users AS t2
WHERE t2.position < users.position)
WHERE id = 3;
ERROR HY000: You can't specify target table 'users' for update in FROM clause
DROP TABLE users;
# Bug#22783011 assertion failed: base_select != removed_select &&
#              aggr_select != removed_select
CREATE TABLE t(a INTEGER) engine=innodb;
INSERT INTO t VALUES(1);
# Per MySQL rules, SUM(1) is aggregated in top query
# (can't be in WHERE, in FROM)
SELECT (SELECT 1 FROM (SELECT 1 FROM t WHERE SUM(1)) AS t);
(SELECT 1 FROM (SELECT 1 FROM t WHERE SUM(1)) AS t)
1
SELECT (SELECT 1 FROM (SELECT 1 FROM t WHERE SUM(0)) AS t);
(SELECT 1 FROM (SELECT 1 FROM t WHERE SUM(0)) AS t)
NULL
DROP TABLE t;
# Bug#23074801: Delete from joined tables with where using derived table
#               fails with error 1093
CREATE TABLE t1 (id INTEGER, d1 INTEGER);
CREATE TABLE t2 (id INTEGER, d2 INTEGER);
DELETE t1, t2
FROM t1 LEFT JOIN t2 ON t1.id = t2.id
WHERE t1.id IN (SELECT * FROM (SELECT id FROM t1) AS t1sub);
DROP TABLE t1, t2;
# Bug#22967439: Mysql 5.7 vs 5.6 incorrect SELECT statement result
CREATE TABLE t1
(integer1 INTEGER NULL,
integer2 INTEGER NULL,
varchar1 VARCHAR(255) NULL);
CREATE TABLE t2
(integer1 INTEGER NULL,
integer2 INTEGER NULL,
varchar1 VARCHAR(255) NULL,
varchar2 VARCHAR(255) NULL);
INSERT INTO t1 VALUES
(11,12,'test1'), (21,22,'test2'), (31,32,'test3');
INSERT INTO t2 VALUES
(11,12,'test1','test12'), (21,22,'test2','test22'), (31,32,'test3','test32');
SELECT g_t3.g_f1, g_t3.g_f2, g_t3.g_f3
FROM (SELECT g_t0.integer1 AS g_f1,
g_t0.integer2 AS g_f2,
g_t0.varchar1 AS g_f3
FROM t1 g_t0
) g_t3
GROUP BY g_t3.g_f1, g_t3.g_f2, g_t3.g_f3
HAVING g_t3.g_f3 = (select varchar1
from t2
where integer1 = g_t3.g_f1
);
g_f1	g_f2	g_f3
11	12	test1
21	22	test2
31	32	test3
DROP TABLE t1, t2;
# Bug#24364448: Assert m_opr_handle != null in
#               ha_innobase_inmem::keys_to_use_for_scanning
CREATE TABLE K (col_int int(11), col_varchar varchar(255)) charset latin1;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO K VALUES (NULL,'m'), (NULL,'z');
CREATE TABLE H (col_varchar varchar(255)) charset latin1;
INSERT INTO H VALUES ('m'), ('z');
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
FLUSH STATUS;
SELECT t1.col_int
FROM (SELECT * FROM K) t1 JOIN (SELECT * FROM H) t2 USING(col_varchar)
WHERE t1.col_int IS NULL
ORDER BY t1.col_int;
col_int
NULL
NULL
SHOW STATUS LIKE 'Created_tmp%';
Variable_name	Value
Created_tmp_disk_tables	0
Created_tmp_files	0
Created_tmp_tables	2
SET @@optimizer_switch=@optimizer_switch_saved;
DROP TABLE K, H;
#
# Bug #25343335: DERIVED TABLE SELECT LIST'S REFERENCE TO ALIAS CAUSES
#                INCORRECT BEHAVIOR
#
CREATE TABLE t1 (c11 int);
INSERT INTO t1 VALUES (1);
EXPLAIN SELECT *
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
Warnings:
Note	1249	Select 3 was reduced during optimization
Note	1003	/* select#1 */ select 1 AS `alias1`,`alias1` AS `alias2` from dual
SELECT *
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
alias1	alias2
1	1
PREPARE xx FROM 'SELECT *
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ';
EXECUTE xx;
alias1	alias2
1	1
EXECUTE xx;
alias1	alias2
1	1
EXECUTE xx;
alias1	alias2
1	1
EXPLAIN SELECT alias2
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	system	NULL	NULL	NULL	NULL	1	100.00	NULL
Warnings:
Note	1249	Select 3 was reduced during optimization
Note	1003	/* select#1 */ select `alias1` AS `alias2` from dual
SELECT alias2
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
alias2
1
PREPARE yy FROM 'SELECT alias2
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ';
EXECUTE yy;
alias2
1
EXECUTE yy;
alias2
1
EXECUTE yy;
alias2
1
DROP TABLE t1;
#
# Bug#26596977: ASSERT `!(USED_TABS & (~READ_TABLES & ~FILTER_FOR_TABLE))'
#               FAILED IN ITEM_FUNC
#
CREATE TABLE t1 (
col_varchar_key varchar(1) ,
pk int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
CREATE TABLE t2 (
col_int int(11) ,
pk int(11) NOT NULL AUTO_INCREMENT,
col_varchar varchar(1) ,
col_varchar_key varchar(1) ,
PRIMARY KEY (pk)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (4,1,'s','r'), (9,19,'p','a');
CREATE TABLE t3 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int int(11) ,
col_varchar_key varchar(1) ,
col_varchar varchar(1) ,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t3 VALUES (100,2,'g',NULL);
EXPLAIN SELECT table1.col_int
FROM t3 AS table1
LEFT JOIN (
SELECT subquery1_t1.*
FROM t1 AS subquery1_t1
RIGHT JOIN t2 AS subquery1_t2
ON (subquery1_t2.col_varchar_key = subquery1_t1.col_varchar_key)
) AS table3
ON (table3.col_varchar_key = table1.col_varchar_key)
WHERE table3.col_varchar_key  IN (
SELECT subquery2_t3.col_varchar
FROM t3 AS subquery2_t3
WHERE subquery2_t3.pk < table3.pk
);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
Warnings:
Note	1276	Field or reference 'table3.pk' of SELECT #3 was resolved in SELECT #1
Note	1003	/* select#1 */ select '2' AS `col_int` from `test`.`t2` `subquery1_t2` join `test`.`t1` `subquery1_t1` semi join (`test`.`t3` `subquery2_t3`) where ((`test`.`subquery2_t3`.`pk` < NULL) and multiple equal('g', NULL, `test`.`subquery2_t3`.`col_varchar`, `test`.`subquery1_t2`.`col_varchar_key`))
SELECT table1.col_int
FROM t3 AS table1
LEFT JOIN (
SELECT subquery1_t1.*
FROM t1 AS subquery1_t1
RIGHT JOIN t2 AS subquery1_t2
ON (subquery1_t2.col_varchar_key = subquery1_t1.col_varchar_key)
) AS table3
ON (table3.col_varchar_key = table1.col_varchar_key)
WHERE table3.col_varchar_key  IN (
SELECT subquery2_t3.col_varchar
FROM t3 AS subquery2_t3
WHERE subquery2_t3.pk < table3.pk
);
col_int
DROP TABLE t1, t2, t3;
#
# Bug #26618455: ASSERT 'KEYPARTS > 0' IN CALC_LENGTH_AND_KEYPARTS()
#                WITHOUT FIRSTMATCH
#
CREATE TABLE t1 (
col_int int(11) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_int_key int(11) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (0,1,'i','n',125);
INSERT INTO t1 VALUES (3,20,'b','o',0);
CREATE TABLE t2 (
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_int int(11) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (3,'y','p',4,1);
CREATE TABLE t3 (
col_int int(11) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
col_varchar_key varchar(1) DEFAULT NULL,
col_int_key int(11) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
CREATE TABLE t4 (  col_int int(11) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM
;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t4 VALUES (7,'k',9,'z',20);
SET optimizer_switch = 'firstmatch=off';
EXPLAIN SELECT
table2.col_int_key AS field3
FROM
(
SELECT subquery2_t2.*
FROM t1 AS subquery2_t1
INNER JOIN t2 AS subquery2_t2
ON (subquery2_t2.pk = subquery2_t1.col_int)
) AS table1
RIGHT OUTER JOIN (
SELECT subquery3_t1.*
FROM t2 AS subquery3_t1
) AS table2
ON (table1.col_varchar_key = table2.col_varchar_key)
WHERE table1.col_varchar_key IN (
SELECT subquery4_t1.col_varchar AS subquery4_field1
FROM t3 AS subquery4_t1);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	subquery2_t2	NULL	system	PRIMARY,col_varchar_key	NULL	NULL	NULL	1	100.00	NULL
1	SIMPLE	subquery3_t1	NULL	system	col_varchar_key	NULL	NULL	NULL	1	100.00	NULL
1	SIMPLE	<subquery4>	NULL	eq_ref	<auto_distinct_key>	<auto_distinct_key>	7	const	1	100.00	Using where
1	SIMPLE	subquery2_t1	NULL	ALL	NULL	NULL	NULL	NULL	2	50.00	Using where; Using join buffer (Block Nested Loop)
4	MATERIALIZED	subquery4_t1	NULL	ALL	NULL	NULL	NULL	NULL	0	0.00	Using where
Warnings:
Note	1003	/* select#1 */ select '3' AS `field3` from `test`.`t1` `subquery2_t1` semi join (`test`.`t3` `subquery4_t1`) where ((`test`.`subquery2_t1`.`col_int` = '1') and (`<subquery4>`.`subquery4_field1` = 'y') and (`test`.`subquery4_t1`.`col_varchar` = 'y'))
SELECT
table2.col_int_key AS field3
FROM
(
SELECT subquery2_t2.*
FROM t1 AS subquery2_t1
INNER JOIN t2 AS subquery2_t2
ON (subquery2_t2.pk = subquery2_t1.col_int)
) AS table1
RIGHT OUTER JOIN (
SELECT subquery3_t1.*
FROM t2 AS subquery3_t1
) AS table2
ON (table1.col_varchar_key = table2.col_varchar_key)
WHERE table1.col_varchar_key IN (
SELECT subquery4_t1.col_varchar AS subquery4_field1
FROM t3 AS subquery4_t1);
field3
SET optimizer_switch = default;
DROP TABLE t1, t2, t3, t4;
# Bug#26798989: Sig 11 in find_table_in_global_list
CREATE TABLE t1(a INTEGER);
CREATE TABLE t2(a INTEGER);
UPDATE t1
SET a=5
WHERE a IN (SELECT a FROM t2
ORDER BY (SELECT a FROM (SELECT SUM(a) FROM t1) AS dt));
DROP TABLE t1, t2;