SET SQL_WARNINGS=1;
CREATE TABLE t1 (
a tinytext NOT NULL,
b tinyint(3) unsigned NOT NULL default '0',
PRIMARY KEY (a(32),b)
) ENGINE=MyISAM;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES ('a',1),('a',2);
SELECT * FROM t1 WHERE a='a' AND b=2;
a	b
a	2
SELECT * FROM t1 WHERE a='a' AND b in (2);
a	b
a	2
SELECT * FROM t1 WHERE a='a' AND b in (1,2);
a	b
a	1
a	2
drop table t1;
CREATE TABLE t1 (c CHAR(10) NOT NULL,i INT NOT NULL AUTO_INCREMENT,
UNIQUE (c,i)) ENGINE=MYISAM;
INSERT IGNORE INTO t1 (c) VALUES (NULL),(NULL);
Warnings:
Warning	1048	Column 'c' cannot be null
SELECT * FROM t1;
c	i
	1
	2
INSERT INTO t1 (c) VALUES ('a'),('a');
SELECT * FROM t1;
c	i
	1
	2
a	1
a	2
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (c CHAR(10) NULL, i INT NOT NULL AUTO_INCREMENT,
UNIQUE (c,i)) ENGINE=MYISAM;
INSERT INTO t1 (c) VALUES (NULL),(NULL);
SELECT * FROM t1;
c	i
NULL	1
NULL	2
INSERT INTO t1 (c) VALUES ('a'),('a');
SELECT * FROM t1;
c	i
NULL	1
NULL	2
a	1
a	2
drop table t1;
CREATE TABLE t1 (id int unsigned auto_increment, name char(50), primary key (id)) engine=myisam;
insert into t1 (name) values ('a'), ('b'),('c'),('d'),('e'),('f'),('g');
explain select 1 from t1 where id =2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` where true
explain select 1 from t1 where id =2 or id=3;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	range	PRIMARY	PRIMARY	4	NULL	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` where ((`test`.`t1`.`id` = 2) or (`test`.`t1`.`id` = 3))
explain select name from t1 where id =2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select 'b' AS `name` from `test`.`t1` where true
ALTER TABLE t1 DROP PRIMARY KEY, ADD INDEX (id);
explain select 1 from t1 where id =2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ref	id	id	4	const	1	100.00	Using index
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` where (`test`.`t1`.`id` = 2)
drop table t1;
create table t1 (c varchar(30), t text, unique (c(2)), unique (t(3))) charset utf8 engine=myisam;
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.
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c` varchar(30) DEFAULT NULL,
  `t` text,
  UNIQUE KEY `c` (`c`(2)),
  UNIQUE KEY `t` (`t`(3))
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb3
insert t1 values ('cccc', 'tttt'),
(0xD0B1212223D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1212223D0B1D0B1D0B1D0B1),
(0xD0B1222123D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1222123D0B1D0B1D0B1D0B1);
insert t1 (c) values ('cc22');
ERROR 23000: Duplicate entry 'cc' for key 't1.c'
insert t1 (t) values ('ttt22');
ERROR 23000: Duplicate entry 'ttt' for key 't1.t'
insert t1 (c) values (0xD0B1212322D0B1D0B1D0B1D0B1D0B1);
ERROR 23000: Duplicate entry 'б!' for key 't1.c'
insert t1 (t) values (0xD0B1D0B1212322D0B1D0B1D0B1D0B1);
ERROR 23000: Duplicate entry 'бб!' for key 't1.t'
select c from t1 where c='cccc';
c
cccc
select t from t1 where t='tttt';
t
tttt
select c from t1 where c=0xD0B1212223D0B1D0B1D0B1D0B1D0B1;
c
б!"#ббббб
select t from t1 where t=0xD0B1D0B1212223D0B1D0B1D0B1D0B1;
t
бб!"#бббб
drop table t1;
DROP TABLE IF EXISTS t1;
Warnings:
Note	1051	Unknown table 'test.t1'
CREATE TABLE t1 (
c1 int,
c2 varbinary(240),
UNIQUE KEY (c1),
KEY (c2)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,'\Z\Z\Z\Z');
INSERT INTO t1 VALUES (2,'\Z\Z\Z\Z\Z\Z');
INSERT INTO t1 VALUES (3,'\Z\Z\Z\Z');
select c1 from t1 where c2='\Z\Z\Z\Z';
c1
1
3
DELETE FROM t1 WHERE (c1 = 1);
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
select c1 from t1 where c2='\Z\Z\Z\Z';
c1
3
DELETE FROM t1 WHERE (c1 = 3);
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
select c1 from t1 where c2='\Z\Z\Z\Z';
c1
truncate table t1;
insert into t1 values(1,"aaaa"),(2,"aaab"),(3,"aaac"),(4,"aaccc");
delete from t1 where c1=3;
delete from t1 where c1=1;
delete from t1 where c1=4;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
create table t1 (
c1 int,
c2 varchar(20) not null,
primary key (c1),
key (c2(10))
) engine=myisam;
insert into t1 values (1,'');
insert into t1 values (2,' \t\tTest String');
insert into t1 values (3,' \n\tTest String');
update t1 set c2 = 'New Test String' where c1 = 1;
select * from t1;
c1	c2
1	New Test String
2	 		Test String
3	 
	Test String
drop table t1;
CREATE TABLE t1( a TINYINT, KEY(a) ) ENGINE=MyISAM;
INSERT INTO t1 VALUES( 1 );
ALTER TABLE t1 DISABLE KEYS;
EXPLAIN SELECT MAX(a) FROM t1 FORCE INDEX(a);
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	1003	/* select#1 */ select max('1') AS `MAX(a)` from dual
drop table t1;
CREATE TABLE t1 (a INT, b INT, INDEX (a,b)) engine=myisam;
INSERT INTO t1 (a, b)
VALUES
(1,1), (1,2), (1,3), (1,4), (1,5),
(2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
(5,1), (5,2), (5,3), (5,4), (5,5);
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
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	Impossible WHERE
2	SUBQUERY	t1	NULL	range	a	a	5	NULL	11	100.00	Using index for group-by
Warnings:
Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` `t1_outer` where false
SELECT 1 as RES FROM t1 AS t1_outer WHERE
(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
RES
DROP TABLE t1;
#
# Bug#18144: Cost with FORCE/USE index seems incorrect in some cases.
#
# We are interested in showing that the cost for the last plan is higher
# than for the preceding two plans.
#
CREATE TABLE t1( a INT, b INT, KEY( a ) ) engine=myisam;
INSERT INTO t1 values (1, 2), (1, 3), (2, 3), (2, 4), (3, 4), (3, 5);
EXPLAIN SELECT a, SUM( b ) FROM t1 GROUP BY a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	index	a	a	5	NULL	6	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,sum(`test`.`t1`.`b`) AS `SUM( b )` from `test`.`t1` group by `test`.`t1`.`a`
SHOW STATUS LIKE 'Last_query_cost';
Variable_name	Value
Last_query_cost	1.102296
EXPLAIN SELECT a, SUM( b ) FROM t1 USE INDEX( a ) GROUP BY a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	index	a	a	5	NULL	6	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,sum(`test`.`t1`.`b`) AS `SUM( b )` from `test`.`t1` USE INDEX (`a`) group by `test`.`t1`.`a`
SHOW STATUS LIKE 'Last_query_cost';
Variable_name	Value
Last_query_cost	1.102296
EXPLAIN SELECT a, SUM( b ) FROM t1 FORCE INDEX( a ) GROUP BY a;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	index	a	a	5	NULL	6	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,sum(`test`.`t1`.`b`) AS `SUM( b )` from `test`.`t1` FORCE INDEX (`a`) group by `test`.`t1`.`a`
SHOW STATUS LIKE 'Last_query_cost';
Variable_name	Value
Last_query_cost	2.349000
DROP TABLE t1;
#
# Additional coverage for handling of key algorithm in index definition.
#
#
# 1) Default case. If key algorithm was not specified explicitly and
#    this is normal key (not spatial or fulltext) storage engine
#    default key algorithm is used.
#  
create table tm (k int, index (k)) charset utf8mb4 engine=myisam;
#
# Key algorithm is not shown in SHOW CREATE TABLE output in this case
#
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#
# But visible in I_S.STATISTICS
#
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name ='tm' order by table_name;
TABLE_NAME	INDEX_TYPE
tm	BTREE
#
# Same applies when keys are added by ALTER TABLE
#
alter table tm add column l int, add index (l);
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `k` int DEFAULT NULL,
  `l` int DEFAULT NULL,
  KEY `k` (`k`),
  KEY `l` (`l`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' and index_name = 'l'
  order by table_name;
TABLE_NAME	INDEX_TYPE
tm	BTREE
drop tables tm;
#
# 2) For SPATIAL and FULLTEXT keys we always use special key
#    algorithms and there is no way to specify it explicitly.
#
create table tm (pk int primary key, p point not null SRID 0, spatial index (p))
charset utf8mb4 engine=myisam;
#
# Key algorithm is not shown in SHOW CREATE TABLE output in this
# case as well.
#
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `pk` int NOT NULL,
  `p` point NOT NULL /*!80003 SRID 0 */,
  PRIMARY KEY (`pk`),
  SPATIAL KEY `p` (`p`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#
# But visible in I_S.STATISTICS
#
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' and index_name = 'p'
  order by table_name;
TABLE_NAME	INDEX_TYPE
tm	SPATIAL
#
# Same applies when keys are added by ALTER TABLE
#
alter table tm add column q point not null SRID 0, add spatial index (q);
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' and index_name = 'q'
  order by table_name;
TABLE_NAME	INDEX_TYPE
tm	SPATIAL
drop tables tm;
#
# Same applies to FULLTEXT indexes.
#
create table tm (pk int primary key, v varchar(255), fulltext index (v))
charset utf8mb4 engine=myisam;
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `pk` int NOT NULL,
  `v` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`pk`),
  FULLTEXT KEY `v` (`v`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' and index_name = 'v'
  order by table_name;
TABLE_NAME	INDEX_TYPE
tm	FULLTEXT
#
# Same applies when keys are added by ALTER TABLE
#
alter table tm add column w varchar(255), add fulltext index (w);
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `pk` int NOT NULL,
  `v` varchar(255) DEFAULT NULL,
  `w` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`pk`),
  FULLTEXT KEY `v` (`v`),
  FULLTEXT KEY `w` (`w`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' and index_name = 'w'
  order by table_name;
TABLE_NAME	INDEX_TYPE
tm	FULLTEXT
drop tables tm;
#
# 3) If key algorithm was specified explicitly and it is supported
#    by the storage engine it will be used.
#
create table tm (k int, index using btree (k)) charset utf8mb4 engine=myisam;
#
# In this case it is shown in SHOW CREATE TABLE output
#
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`) USING BTREE
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#
# Also visible in I_S.STATISTICS
#
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' order by table_name;
TABLE_NAME	INDEX_TYPE
tm	BTREE
#
# Same applies when keys are added by ALTER TABLE
#
# Note that the information that algorithm was provided explicitly is
# preserved by ALTER TABLE.
alter table tm add column l int, add index using btree (l);
show create table tm;
Table	Create Table
tm	CREATE TABLE `tm` (
  `k` int DEFAULT NULL,
  `l` int DEFAULT NULL,
  KEY `k` (`k`) USING BTREE,
  KEY `l` (`l`) USING BTREE
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
select table_name, index_type from information_schema.statistics
where table_schema = 'test' and table_name = 'tm' and index_name = 'l'
  order by table_name;
TABLE_NAME	INDEX_TYPE
tm	BTREE
drop tables tm;
#
# 7) Key algorithm and ALTER TABLE ALGORITHM=INPLACE
#
# Changing key algorithm from one used by default to the same one
# but specified explicitly should be inplace/fast operation.
create table t1 (k int, index (k)) charset utf8mb4 engine=myisam;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
alter table t1 drop key k, add index using btree (k), algorithm=inplace;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`) USING BTREE
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
alter table t1 drop key k, add index (k), algorithm=inplace;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# Note that below statement doesn't really change algorithm.
alter table t1 drop key k, add index using hash (k), algorithm=inplace;
Warnings:
Note	3502	This storage engine does not support the HASH index algorithm, storage engine default was used instead.
drop table t1;
# Changing key algorithm to another one can require COPY algorithm.
create table t1 (k int, index (k)) charset utf8mb4 engine=heap;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
alter table t1 drop key k, add index using btree (k), algorithm=inplace;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY.
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
alter table t1 drop key k, add index using btree (k), algorithm=copy;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int DEFAULT NULL,
  KEY `k` (`k`) USING BTREE
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
drop table t1;