~drizzle-trunk/drizzle/development

drop table if exists t0, t1, t2, t3;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int, 
b int
);
insert into t1 values (1,1),(1,1),(2,2);
create table t2 (
a int,
b int,
key(b)
);
insert into t2 select a, a/2 from t0;
select * from t1;
a	b
1	1
1	1
2	2
select * from t2;
a	b
0	0
1	1
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	5
explain select * from t2 where b in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	Using where
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	
select * from t2 where b in (select a from t1);
a	b
1	1
2	1
3	2
4	2
create table t3 (
a int, 
b int,
key(b),
pk1 char(100), pk2 char(100), pk3 char(100),
primary key(pk1, pk2, pk3)
) engine=innodb;
insert into t3 select a,a, a,a,a from t0;
explain select * from t3 where b in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	10	Using where
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	
select * from t3 where b in (select a from t1);
a	b	pk1	pk2	pk3
1	1	1	1	1
2	2	2	2	2
set @save_max_heap_table_size= @@max_heap_table_size;
set max_heap_table_size=16384;
set @save_join_buffer_size = @@join_buffer_size;
drop table t3;
create table t3 (
a int, 
b int,
key(b),
pk1 char(100), pk2 char(100),
primary key(pk1, pk2)
) engine=innodb;
insert into t3 select 
A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a 
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	50	Using where
2	SUBQUERY	t0	ALL	NULL	NULL	NULL	NULL	10	
select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5);
a	b	pk1	pk2
0	0	0	0
1	1	1	1
10	10	10	10
11	11	11	11
12	12	12	12
13	13	13	13
2	2	2	2
3	3	3	3
4	4	4	4
5	5	5	5
6	6	6	6
7	7	7	7
8	8	8	8
9	9	9	9
set join_buffer_size= @save_join_buffer_size;
set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
2	SUBQUERY	t2	index	NULL	b	5	NULL	10	Using index
select * from t1;
a	b
1	1
1	1
2	2
select * from t1 where a in (select b from t2);
a	b
1	1
1	1
2	2
drop table t1, t2, t3;
set @save_join_buffer_size = @@join_buffer_size;
set join_buffer_size=8000;
Warnings:
Error	1292	Truncated incorrect join_buffer_size value: '8000'
create table t1 (a int, filler1 varbinary(20), filler2 varbinary(20));
insert into t1 select a, 'filler123456', 'filler123456' from t0;
insert into t1 select a+10, 'filler123456', 'filler123456' from t0;
create table t2 as select * from t1;
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
insert into t1 values (2, 'duplicate ok', 'duplicate ok');
insert into t1 values (18, 'duplicate ok', 'duplicate ok');
insert into t2 values (3, 'duplicate ok', 'duplicate ok');
insert into t2 values (19, 'duplicate ok', 'duplicate ok');
explain select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z 
from t1 t0 where a in (select a from t2 it);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	32	Using where
2	SUBQUERY	it	ALL	NULL	NULL	NULL	NULL	22	
select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z 
from t1 t0 where a in (select a from t2 it);
a	mid(filler1, 1,10)	Z
0	filler1234	1
1	filler1234	1
2	filler1234	1
3	filler1234	1
4	filler1234	1
5	filler1234	1
6	filler1234	1
7	filler1234	1
8	filler1234	1
9	filler1234	1
10	filler1234	1
11	filler1234	1
12	filler1234	1
13	filler1234	1
14	filler1234	1
15	filler1234	1
16	filler1234	1
17	filler1234	1
18	filler1234	1
19	filler1234	1
2	duplicate 	1
18	duplicate 	1
explain select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) 
from t2 t0 where a in (select a from t1 it);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	22	Using where
2	SUBQUERY	it	ALL	NULL	NULL	NULL	NULL	32	
select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) 
from t2 t0 where a in (select a from t1 it);
a	mid(filler1, 1,10)	length(filler1)=length(filler2)
0	filler1234	1
1	filler1234	1
2	filler1234	1
3	filler1234	1
4	filler1234	1
5	filler1234	1
6	filler1234	1
7	filler1234	1
8	filler1234	1
9	filler1234	1
10	filler1234	1
11	filler1234	1
12	filler1234	1
13	filler1234	1
14	filler1234	1
15	filler1234	1
16	filler1234	1
17	filler1234	1
18	filler1234	1
19	filler1234	1
3	duplicate 	1
19	duplicate 	1
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
explain select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z 
from t1 t0 where a in (select a from t2 it);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	52	Using where
2	SUBQUERY	it	ALL	NULL	NULL	NULL	NULL	22	
select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z 
from t1 t0 where a in (select a from t2 it);
a	mid(filler1, 1,10)	Z
0	filler1234	1
1	filler1234	1
2	filler1234	1
3	filler1234	1
4	filler1234	1
5	filler1234	1
6	filler1234	1
7	filler1234	1
8	filler1234	1
9	filler1234	1
10	filler1234	1
11	filler1234	1
12	filler1234	1
13	filler1234	1
14	filler1234	1
15	filler1234	1
16	filler1234	1
17	filler1234	1
18	filler1234	1
19	filler1234	1
2	duplicate 	1
18	duplicate 	1
explain select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) 
from t2 t0 where a in (select a from t1 it);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	22	Using where
2	SUBQUERY	it	ALL	NULL	NULL	NULL	NULL	52	
select 
a, mid(filler1, 1,10), length(filler1)=length(filler2) 
from t2 t0 where a in (select a from t1 it);
a	mid(filler1, 1,10)	length(filler1)=length(filler2)
0	filler1234	1
1	filler1234	1
2	filler1234	1
3	filler1234	1
4	filler1234	1
5	filler1234	1
6	filler1234	1
7	filler1234	1
8	filler1234	1
9	filler1234	1
10	filler1234	1
11	filler1234	1
12	filler1234	1
13	filler1234	1
14	filler1234	1
15	filler1234	1
16	filler1234	1
17	filler1234	1
18	filler1234	1
19	filler1234	1
3	duplicate 	1
19	duplicate 	1
drop table t1, t2;
create table t1 (a int, b int, key(a));
create table t2 (a int, b int, key(a));
create table t3 (a int, b int, key(a));
insert into t1 select a,a from t0;
insert into t2 select a,a from t0;
insert into t3 select a,a from t0;
t2 and t3 must be use 'ref', not 'ALL':
explain select * 
from t0 where a in
(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
2	SUBQUERY	t1	index	NULL	a	5	NULL	10	Using index
2	SUBQUERY	t2	ref	a	a	5	test.t1.a	1	Using index
2	SUBQUERY	t3	ref	a	a	5	test.t1.a	1	Using index
drop table t0, t1,t2,t3;
CREATE TABLE t1 (
ID int NOT NULL auto_increment,
Name char(35) NOT NULL default '',
Country char(3) NOT NULL default '',
Population int NOT NULL default '0',
PRIMARY KEY  (ID),
INDEX (Population),
INDEX (Country) 
);
CREATE TABLE t2 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
Population int NOT NULL default '0',
Capital int default NULL,
PRIMARY KEY  (Code),
UNIQUE INDEX (Name),
INDEX (Population)
);
CREATE TABLE t3 (
Country char(3) NOT NULL default '',
Language char(30) NOT NULL default '',
Percentage float(3,1) NOT NULL default '0.0',
PRIMARY KEY  (Country, Language),
INDEX (Percentage)
);
EXPLAIN
SELECT Name FROM t2 
WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000)
AND
t2.Code IN (SELECT Country FROM t3 
WHERE Language='English' AND Percentage > 10 AND
t2.Population > 100000);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	16	Using where
3	DEPENDENT SUBQUERY	t3	unique_subquery	PRIMARY,Percentage	PRIMARY	136	func,const	1	Using where
2	SUBQUERY	t1	range	Population	Population	4	NULL	1	Using where
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (
Code char(3) NOT NULL DEFAULT '',
Name char(52) NOT NULL DEFAULT '',
Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL DEFAULT 'Asia',
Region char(26) NOT NULL DEFAULT '',
SurfaceArea float(10,2) NOT NULL DEFAULT '0.00',
IndepYear int DEFAULT NULL,
Population int NOT NULL DEFAULT '0',
LifeExpectancy float(3,1) DEFAULT NULL,
GNP float(10,2) DEFAULT NULL,
GNPOld float(10,2) DEFAULT NULL,
LocalName char(45) NOT NULL DEFAULT '',
GovernmentForm char(45) NOT NULL DEFAULT '',
HeadOfState char(60) DEFAULT NULL,
Capital int DEFAULT NULL,
Code2 char(2) NOT NULL DEFAULT '',
PRIMARY KEY (Code)
);
CREATE TABLE t2 (
ID int NOT NULL, 
Name char(35) NOT NULL DEFAULT '',
CountryCode char(3) NOT NULL DEFAULT '',
Population int NOT NULL DEFAULT '0',
PRIMARY KEY (ID),
KEY CountryCode (CountryCode)
);
Fill the table with test data
This must not use LooseScan:
EXPLAIN SELECT Name FROM t1 
WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	31	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	125	Using where
SELECT Name FROM t1 
WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
Name
drop table t1, t2;
#
# MySQL BUG #42742: crash in setup_sj_materialization, Copy_field::set
# 
create table t3 ( c1 date) engine=innodb;
insert into t3 values ('2009-10-22'),('2142-10-22');
create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb;
select * from t3;
c1
2009-10-22
2142-10-22
explain select 1 from t2 where  c2 in (select 1 from t3 CROSS JOIN t2) and  c1 in (select convert(c6,char(1)) from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
3	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	1	
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	1	
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using join buffer
drop table t2, t3;