SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
create table t1 (bandID MEDIUMINT UNSIGNED NOT NULL PRIMARY KEY, payoutID SMALLINT UNSIGNED NOT NULL) engine=myisam;
insert into t1 (bandID,payoutID) VALUES (1,6),(2,6),(3,4),(4,9),(5,10),(6,1),(7,12),(8,12);
alter table t1 add column new_col int, order by payoutid,bandid;
select * from t1;
bandID	payoutID	new_col
6	1	NULL
3	4	NULL
1	6	NULL
2	6	NULL
4	9	NULL
5	10	NULL
7	12	NULL
8	12	NULL
alter table t1 order by bandid,payoutid;
select * from t1;
bandID	payoutID	new_col
1	6	NULL
2	6	NULL
3	4	NULL
4	9	NULL
5	10	NULL
6	1	NULL
7	12	NULL
8	12	NULL
drop table t1;
CREATE TABLE t1 (
id int(11) unsigned NOT NULL default '0',
category_id tinyint(4) unsigned NOT NULL default '0',
type_id tinyint(4) unsigned NOT NULL default '0',
body text NOT NULL,
user_id int(11) unsigned NOT NULL default '0',
status enum('new','old') NOT NULL default 'new',
PRIMARY KEY (id)
) 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.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
ALTER TABLE t1 ORDER BY t1.id, t1.status, t1.type_id, t1.user_id, t1.body;
DROP TABLE t1;
CREATE TABLE t1 (AnamneseId int(10) unsigned NOT NULL auto_increment,B BLOB,PRIMARY KEY (AnamneseId)) engine=myisam;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
insert into t1 values (null,"hello");
LOCK TABLES t1 WRITE;
ALTER TABLE t1 ADD Column new_col int not null;
UNLOCK TABLES;
OPTIMIZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
DROP TABLE t1;
create table t1 (n1 int not null, n2 int, n3 int, n4 float,
unique(n1),
key (n1, n2, n3, n4), 
key (n2, n3, n4, n1), 
key (n3, n4, n1, n2), 
key (n4, n1, n2, n3) ) engine=Myisam;
alter table t1 disable keys;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	n1	1	n1	A	0	NULL	NULL		BTREE			YES	NULL
t1	1	n1_2	1	n1	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
t1	1	n1_2	2	n2	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n1_2	3	n3	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n1_2	4	n4	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n2	1	n2	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n2	2	n3	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n2	3	n4	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n2	4	n1	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
t1	1	n3	1	n3	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n3	2	n4	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n3	3	n1	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
t1	1	n3	4	n2	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n4	1	n4	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n4	2	n1	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
t1	1	n4	3	n2	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
t1	1	n4	4	n3	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
insert into t1 values(10,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(9,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(8,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(7,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(6,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(5,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(4,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(3,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(2,RAND()*1000,RAND()*1000,RAND());
insert into t1 values(1,RAND()*1000,RAND()*1000,RAND());
alter table t1 enable keys;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	n1	1	n1	A	0	NULL	NULL		BTREE			YES	NULL
t1	1	n1_2	1	n1	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	1	n1_2	2	n2	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n1_2	3	n3	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n1_2	4	n4	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n2	1	n2	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n2	2	n3	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n2	3	n4	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n2	4	n1	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	1	n3	1	n3	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n3	2	n4	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n3	3	n1	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	1	n3	4	n2	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n4	1	n4	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n4	2	n1	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	1	n4	3	n2	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	n4	4	n3	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
drop table t1;
CREATE TABLE t1 (
Host varchar(16) binary NOT NULL default '',
User varchar(16) binary NOT NULL default '',
PRIMARY KEY  (Host,User)
) ENGINE=MyISAM;
Warnings:
Warning	1287	'BINARY as attribute of a type' is deprecated and will be removed in a future release. Please use a CHARACTER SET clause with _bin collation instead
Warning	1287	'BINARY as attribute of a type' is deprecated and will be removed in a future release. Please use a CHARACTER SET clause with _bin collation instead
ALTER TABLE t1 DISABLE KEYS;
LOCK TABLES t1 WRITE;
INSERT INTO t1 VALUES ('localhost','root'),('localhost',''),('games','monty');
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	Host	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	User	A	0	NULL	NULL		BTREE			YES	NULL
ALTER TABLE t1 ENABLE KEYS;
UNLOCK TABLES;
CHECK TABLES t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
CREATE TABLE t1 (
Host varchar(16) binary NOT NULL default '',
User varchar(16) binary NOT NULL default '',
PRIMARY KEY  (Host,User),
KEY  (Host)
) ENGINE=MyISAM;
Warnings:
Warning	1287	'BINARY as attribute of a type' is deprecated and will be removed in a future release. Please use a CHARACTER SET clause with _bin collation instead
Warning	1287	'BINARY as attribute of a type' is deprecated and will be removed in a future release. Please use a CHARACTER SET clause with _bin collation instead
ALTER TABLE t1 DISABLE KEYS;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	Host	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	User	A	0	NULL	NULL		BTREE			YES	NULL
t1	1	Host	1	Host	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
LOCK TABLES t1 WRITE;
INSERT INTO t1 VALUES ('localhost','root'),('localhost','');
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	Host	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	User	A	0	NULL	NULL		BTREE			YES	NULL
t1	1	Host	1	Host	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
ALTER TABLE t1 ENABLE KEYS;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	Host	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	User	A	0	NULL	NULL		BTREE			YES	NULL
t1	1	Host	1	Host	A	NULL	NULL	NULL		BTREE			YES	NULL
UNLOCK TABLES;
CHECK TABLES t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
LOCK TABLES t1 WRITE;
ALTER TABLE t1 RENAME t2;
UNLOCK TABLES;
select * from t2;
Host	User
localhost	
localhost	root
DROP TABLE t2;
CREATE TABLE t1 (
Host varchar(16) binary NOT NULL default '',
User varchar(16) binary NOT NULL default '',
PRIMARY KEY  (Host,User),
KEY  (Host)
) ENGINE=MyISAM;
Warnings:
Warning	1287	'BINARY as attribute of a type' is deprecated and will be removed in a future release. Please use a CHARACTER SET clause with _bin collation instead
Warning	1287	'BINARY as attribute of a type' is deprecated and will be removed in a future release. Please use a CHARACTER SET clause with _bin collation instead
LOCK TABLES t1 WRITE;
ALTER TABLE t1 DISABLE KEYS;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	Host	A	NULL	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	User	A	0	NULL	NULL		BTREE			YES	NULL
t1	1	Host	1	Host	A	NULL	NULL	NULL		BTREE	disabled		YES	NULL
DROP TABLE t1;
drop table if exists t1, t2;
Warnings:
Note	1051	Unknown table 'test.t1'
Note	1051	Unknown table 'test.t2'
create table t1 ( a varchar(10) not null primary key ) engine=myisam;
create table t2 ( a varchar(10) not null primary key ) engine=merge union=(t1);
flush tables;
alter table t1 modify a varchar(10);
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` varchar(10) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MRG_MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci UNION=(`t1`)
flush tables;
alter table t1 modify a varchar(10) not null;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` varchar(10) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MRG_MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci UNION=(`t1`)
drop table if exists t1, t2;
create table t1 (a int, b int, c int, d int, e int, f int, g int, h int,i int, primary key (a,b,c,d,e,f,g,i,h)) engine=MyISAM;
insert into t1 (a) values(1);
Warnings:
Warning	1364	Field 'b' doesn't have a default value
Warning	1364	Field 'c' doesn't have a default value
Warning	1364	Field 'd' doesn't have a default value
Warning	1364	Field 'e' doesn't have a default value
Warning	1364	Field 'f' doesn't have a default value
Warning	1364	Field 'g' doesn't have a default value
Warning	1364	Field 'h' doesn't have a default value
Warning	1364	Field 'i' doesn't have a default value
show table status like 't1';
Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
t1	MyISAM	10	Fixed	1	37	X	X	X	X	X	X	X	X	utf8mb4_0900_ai_ci	NULL		
alter table t1 modify a int;
show table status like 't1';
Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
t1	MyISAM	10	Fixed	1	37	X	X	X	X	X	X	X	X	utf8mb4_0900_ai_ci	NULL		
drop table t1;
create table t1 (a int not null, b int not null, c int not null, d int not null, e int not null, f int not null, g int not null, h int not null,i int not null, primary key (a,b,c,d,e,f,g,i,h)) engine=MyISAM;
insert into t1 (a) values(1);
Warnings:
Warning	1364	Field 'b' doesn't have a default value
Warning	1364	Field 'c' doesn't have a default value
Warning	1364	Field 'd' doesn't have a default value
Warning	1364	Field 'e' doesn't have a default value
Warning	1364	Field 'f' doesn't have a default value
Warning	1364	Field 'g' doesn't have a default value
Warning	1364	Field 'h' doesn't have a default value
Warning	1364	Field 'i' doesn't have a default value
show table status like 't1';
Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
t1	MyISAM	10	Fixed	1	37	X	X	X	X	X	X	X	X	utf8mb4_0900_ai_ci	NULL		
drop table t1;
CREATE TABLE T12207(a int) engine=MyISAM;
ALTER TABLE T12207 DISCARD TABLESPACE;
ERROR HY000: Table storage engine for 'T12207' doesn't have this option
DROP TABLE T12207;
drop table if exists t1;
create table t1 (a int, key(a)) engine=myisam;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
"this used not to disable the index"
alter table t1 modify a int, disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
alter table t1 enable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 modify a bigint, disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
alter table t1 enable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 add b char(10), disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
alter table t1 add c decimal(10,2), enable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
"this however did"
alter table t1 disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
desc t1;
Field	Type	Null	Key	Default	Extra
a	bigint(20)	YES	MUL	NULL	
b	char(10)	YES		NULL	
c	decimal(10,2)	YES		NULL	
alter table t1 add d decimal(15,5);
"The key should still be disabled"
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
drop table t1;
"Now will test with one unique index"
create table t1(a int, b char(10), unique(a)) engine=myisam;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 enable keys;
"If no copy on noop change, this won't touch the data file"
"Unique index, no change"
alter table t1 modify a int, disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
"Change the type implying data copy"
"Unique index, no change"
alter table t1 modify a bigint, disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 modify a bigint;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 modify a int;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
drop table t1;
"Now will test with one unique and one non-unique index"
create table t1(a int, b char(10), unique(a), key(b)) engine=myisam;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
alter table t1 disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
alter table t1 enable keys;
"If no copy on noop change, this won't touch the data file"
"The non-unique index will be disabled"
alter table t1 modify a int, disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
alter table t1 enable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
"Change the type implying data copy"
"The non-unique index will be disabled"
alter table t1 modify a bigint, disable keys;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
"Change again the type, but leave the indexes as_is"
alter table t1 modify a int;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
"Try the same. When data is no copied on similar tables, this is noop"
alter table t1 modify a int;
show indexes from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
t1	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
drop table t1;
CREATE TABLE t1(a INT) ENGINE=MyISAM ROW_FORMAT=FIXED;
CREATE INDEX i1 ON t1(a);
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL,
  KEY `i1` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=FIXED
DROP INDEX i1 ON t1;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=FIXED
DROP TABLE t1;
DROP TABLE IF EXISTS bug24219;
DROP TABLE IF EXISTS bug24219_2;
CREATE TABLE bug24219 (a INT, INDEX(a)) ENGINE=MyISAM;
SHOW INDEX FROM bug24219;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
bug24219	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
ALTER TABLE bug24219 RENAME TO bug24219_2, DISABLE KEYS;
SHOW INDEX FROM bug24219_2;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
bug24219_2	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled		YES	NULL
DROP TABLE bug24219_2;
create table t1(id int(8) primary key auto_increment) engine=heap;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
insert into t1 values (null);
insert into t1 values (null);
select * from t1;
id
1
2
alter table t1 auto_increment = 50;
alter table t1 engine = myisam;
insert into t1 values (null);
select * from t1;
id
1
2
50
alter table t1 engine = heap;
insert into t1 values (null);
select * from t1;
id
1
2
50
51
drop table t1;
set sql_mode= default;
create table t1(f1 int) engine=myisam;
alter table t1 add column f2 datetime not null, add column f21 date not null;
insert into t1 values(1,'2000-01-01','2000-01-01');
alter table t1 add column f3 datetime not null;
ERROR 22007: Incorrect datetime value: '0000-00-00 00:00:00' for column 'f3' at row 1
alter table t1 add column f3 date not null;
ERROR 22007: Incorrect date value: '0000-00-00' for column 'f3' at row 1
alter table t1 add column f4 datetime not null default '2002-02-02',
add column f41 date not null;
ERROR 22007: Incorrect date value: '0000-00-00' for column 'f41' at row 1
alter table t1 add column f4 datetime not null default '2002-02-02',
add column f41 date not null default '2002-02-02';
select * from t1;
f1	f2	f21	f4	f41
1	2000-01-01 00:00:00	2000-01-01	2002-02-02 00:00:00	2002-02-02
drop table t1;
create table t1 (t varchar(255) default null, key t (t(80)))
engine=myisam default charset=latin1;
alter table t1 change t t text;
drop table t1;
create table t1(f1 int not null, f2 int not null, key  (f1), key (f2)) engine=myisam;
select index_length into @unpaked_keys_size from
information_schema.tables where table_name='t1';
alter table t1 pack_keys=1;
select index_length into @paked_keys_size from
information_schema.tables where table_name='t1';
select (@unpaked_keys_size > @paked_keys_size);
(@unpaked_keys_size > @paked_keys_size)
0
select max_data_length into @orig_max_data_length from
information_schema.tables where table_name='t1';
alter table t1 max_rows=100;
select max_data_length into @changed_max_data_length from
information_schema.tables where table_name='t1';
select (@orig_max_data_length > @changed_max_data_length);
(@orig_max_data_length > @changed_max_data_length)
0
drop table t1;
CREATE TABLE t1 (f1 TIMESTAMP NULL DEFAULT NULL,
f2 INT(11) DEFAULT NULL) ENGINE=MYISAM DEFAULT CHARSET=utf8;
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
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 (NULL, NULL), ("2009-10-09 11:46:19", 2);
this should affect no rows as there is no real change
ALTER TABLE t1 CHANGE COLUMN f1 f1_no_real_change TIMESTAMP NULL DEFAULT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
DROP TABLE t1;
#
# Test for bug #12652385 - "61493: REORDERING COLUMNS TO POSITION
#                           FIRST CAN CAUSE DATA TO BE CORRUPTED".
#
# Use MyISAM engine as the fact that InnoDB doesn't support
# in-place ALTER TABLE in cases when columns are being renamed
# hides some bugs.
create table t1 (i int, j int) engine=myisam;
insert into t1 value (1, 2);
# First, test for original problem described in the bug report.
select * from t1;
i	j
1	2
# Change of column order by the below ALTER TABLE statement should
# affect both column names and column contents.
alter table t1 modify column j int first;
select * from t1;
j	i
2	1
# Now test for similar problem with the same root.
# The below ALTER TABLE should change not only the name but
# also the value for the last column of the table.
alter table t1 drop column i, add column k int default 0;
select * from t1;
j	k
2	0
# Clean-up.
drop table t1;
# Additional coverage for refactoring which is made as part
# of fix for bug #27480 "Extend CREATE TEMPORARY TABLES privilege
# to allow temp table operations".
#
# At some point the below test case failed on assertion.
DROP TABLE IF EXISTS t1;
CREATE TEMPORARY TABLE t1 (i int) ENGINE=MyISAM;
ALTER TABLE t1 DISCARD TABLESPACE;
ERROR HY000: Table storage engine for 't1' doesn't have this option
DROP TABLE t1;
#
# 3) Test coverage for handling of RENAME INDEX clause in
#    various storage engines and using different ALTER
#    algorithm.
#
# 3.a) Test coverage for simple storage engines (MyISAM/Heap).
create table t1 (i int, key k(i)) engine=myisam;
insert into t1 values (1);
create table t2 (i int, key k(i)) engine=memory;
insert into t2 values (1);
# MyISAM and Heap should be able to handle key renaming in-place.
alter table t1 algorithm=inplace, rename key k to kk;
alter table t2 algorithm=inplace, rename key k to kk;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT NULL,
  KEY `kk` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `i` int(11) DEFAULT NULL,
  KEY `kk` (`i`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# So by default in-place algorithm should be chosen.
# (ALTER TABLE should report 0 rows affected).
alter table t1 rename key kk to kkk;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
alter table t2 rename key kk to kkk;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT NULL,
  KEY `kkk` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `i` int(11) DEFAULT NULL,
  KEY `kkk` (`i`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# Copy algorithm should work as well.
alter table t1 algorithm=copy, rename key kkk to kkkk;
alter table t2 algorithm=copy, rename key kkk to kkkk;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT NULL,
  KEY `kkkk` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `i` int(11) DEFAULT NULL,
  KEY `kkkk` (`i`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# When renaming is combined with other in-place operation
# it still works as expected (i.e. works in-place).
alter table t1 algorithm=inplace, rename key kkkk to k, alter column i set default 100;
alter table t2 algorithm=inplace, rename key kkkk to k, alter column i set default 100;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT '100',
  KEY `k` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `i` int(11) DEFAULT '100',
  KEY `k` (`i`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# Combining with non-inplace operation results in the whole ALTER
# becoming non-inplace.
alter table t1 algorithm=inplace, rename key k to kk, add column j int;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY.
alter table t2 algorithm=inplace, rename key k to kk, add column j int;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY.
drop table t1, t2;
#
# WL#5534 Online ALTER, Phase 1
#
# Single thread tests.
# See innodb_mysql_sync.test for multi thread tests.
CREATE TABLE m1(a INT PRIMARY KEY, b INT) engine=MyISAM;
INSERT INTO m1 VALUES (1,1), (2,2);
#
# 1: Test ALGORITHM keyword
#
# --enable_info allows us to see how many rows were updated
# by ALTER TABLE. in-place will show 0 rows, while copy > 0.
ALTER TABLE m1 ENABLE KEYS;
affected rows: 0
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= DEFAULT;
affected rows: 0
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= COPY;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= INPLACE;
affected rows: 0
#
# 4: Test LOCK keyword
#
ALTER TABLE m1 ENABLE KEYS, LOCK= DEFAULT;
ALTER TABLE m1 ENABLE KEYS, LOCK= NONE;
ERROR 0A000: LOCK=NONE/SHARED is not supported for this operation. Try LOCK=EXCLUSIVE.
ALTER TABLE m1 ENABLE KEYS, LOCK= SHARED;
ERROR 0A000: LOCK=NONE/SHARED is not supported for this operation. Try LOCK=EXCLUSIVE.
ALTER TABLE m1 ENABLE KEYS, LOCK= EXCLUSIVE;
#
# 5: Test ALGORITHM + LOCK
#
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= INPLACE, LOCK= NONE;
ERROR 0A000: LOCK=NONE/SHARED is not supported for this operation. Try LOCK=EXCLUSIVE.
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= INPLACE, LOCK= SHARED;
ERROR 0A000: LOCK=NONE/SHARED is not supported for this operation. Try LOCK=EXCLUSIVE.
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= INPLACE, LOCK= EXCLUSIVE;
affected rows: 0
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= COPY, LOCK= NONE;
ERROR 0A000: LOCK=NONE is not supported. Reason: COPY algorithm requires a lock. Try LOCK=SHARED.
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= COPY, LOCK= SHARED;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE m1 ENABLE KEYS, ALGORITHM= COPY, LOCK= EXCLUSIVE;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
DROP TABLE m1;
#
# 6: Possible deadlock involving thr_lock.c
#
CREATE TABLE t1(a INT PRIMARY KEY, b INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,2);
START TRANSACTION;
INSERT INTO t1 VALUES (3,3);
# Connection con1
# Sending:
ALTER TABLE t1 DISABLE KEYS;
# Connection default
# Waiting until ALTER TABLE is blocked.
UPDATE t1 SET b = 4;
COMMIT;
# Connection con1
# Reaping: ALTER TABLE t1 DISABLE KEYS
# Connection default
DROP TABLE t1;
#
# 7: Which operations require copy and which can be done in-place?
#
# Test which ALTER TABLE operations are done in-place and
# which operations are done using temporary table copy.
#
# --enable_info allows us to see how many rows were updated
# by ALTER TABLE. in-place will show 0 rows, while copy > 0.
#
# Single operation tests
CREATE TABLE tm1(a INT NOT NULL, b INT, c INT) engine=MyISAM;
CREATE TABLE tm2(a INT PRIMARY KEY AUTO_INCREMENT, b INT, c INT) engine=MyISAM;
INSERT INTO tm1 VALUES (1,1,1), (2,2,2);
INSERT INTO tm2 VALUES (1,1,1), (2,2,2);
ALTER TABLE tm1;
affected rows: 0
ALTER TABLE tm1 ADD COLUMN d VARCHAR(200);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD COLUMN d2 VARCHAR(200);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD COLUMN e ENUM('a', 'b') FIRST;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD COLUMN f INT AFTER a;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD INDEX im1(b);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD UNIQUE INDEX im2 (c);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD FULLTEXT INDEX im3 (d);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD FULLTEXT INDEX im4 (d2);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD PRIMARY KEY(a);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DROP INDEX im3;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DROP COLUMN d2;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ADD CONSTRAINT fm1 FOREIGN KEY (b) REFERENCES tm2(a);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ALTER COLUMN b SET DEFAULT 1;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 ALTER COLUMN b DROP DEFAULT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 CHANGE COLUMN f g INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 CHANGE COLUMN g h VARCHAR(20);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN e ENUM('a', 'b', 'c');
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN e INT;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN e INT AFTER h;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN e INT FIRST;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN c INT NOT NULL;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN c INT NULL;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN h VARCHAR(30);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MODIFY COLUMN h VARCHAR(30) AFTER d;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DROP COLUMN h;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DROP INDEX im2;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DROP PRIMARY KEY;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DROP FOREIGN KEY fm1;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 RENAME TO tm3;
affected rows: 0
ALTER TABLE tm3 RENAME TO tm1;
affected rows: 0
ALTER TABLE tm1 ORDER BY b;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 CONVERT TO CHARACTER SET utf16;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 DEFAULT CHARACTER SET utf8;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 1
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.
ALTER TABLE tm1 FORCE;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 AUTO_INCREMENT 3;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 AVG_ROW_LENGTH 10;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 CHECKSUM 1;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 COMMENT 'test';
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MAX_ROWS 100;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 MIN_ROWS 1;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE tm1 PACK_KEYS 1;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
DROP TABLE tm1,tm2;
affected rows: 0
#
# 8: Scenario in which ALTER TABLE was returning an unwarranted
#    ER_ILLEGAL_HA error at some point during work on this WL.
#
CREATE TABLE tm1(i INT DEFAULT 1) engine=MyISAM;
ALTER TABLE tm1 ADD INDEX ii1(i), ALTER COLUMN i DROP DEFAULT;
DROP TABLE tm1;
#
#BUG#20106553: ALTER TABLE WHICH CHANGES INDEX COMMENT IS NOT
#              LONGER INPLACE/FAST OPERATION.
#Without the patch, the ALTER TABLE to change the index
#comment using INPLACE algorithm reports an error.
CREATE TABLE t1(fld1 int, key key1(fld1) COMMENT 'test') ENGINE= MyISAM;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	key1	1	fld1	A	NULL	NULL	NULL	YES	BTREE		test	YES	NULL
ALTER TABLE t1 DROP INDEX key1, ADD INDEX key1(fld1), ALGORITHM=INPLACE;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	key1	1	fld1	A	NULL	NULL	NULL	YES	BTREE			YES	NULL
DROP TABLE t1;
CREATE TABLE t1(fld1 int, key key1(fld1) COMMENT 'old comment') ENGINE=MyISAM;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	key1	1	fld1	A	NULL	NULL	NULL	YES	BTREE		old comment	YES	NULL
ALTER TABLE t1 DROP INDEX key1, ADD INDEX key1(fld1) COMMENT 'new comment',
ALGORITHM= INPLACE;
SHOW INDEX FROM t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	1	key1	1	fld1	A	NULL	NULL	NULL	YES	BTREE		new comment	YES	NULL
DROP TABLE t1;
#
# BUG#20106837: ALTER TABLE WHICH DROPS AND ADDS THE SAME FULLTEXT
#               INDEX IS NOT INPLACE/FAST.
CREATE TABLE t1(fld1 varchar(200), FULLTEXT(fld1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES('ABCD');
#Without patch, it was not fast a INPLACE ALTER.
ALTER TABLE t1 DROP INDEX fld1, ADD FULLTEXT INDEX fld1(fld1);
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
#Without patch, reports an error 'ER_ALTER_OPERATION_NOT_SUPPORTED'.
ALTER TABLE t1 ALGORITHM=INPLACE, DROP INDEX fld1,
ADD FULLTEXT INDEX fld1(fld1);
DROP TABLE t1;
#
# Bug#20146455: FIND_KEY_CI RETURNS NULL, CAUSES CRASH IN
#               FILL_ALTER_INPLACE_INFO
#
CREATE TABLE t1 (a INT PRIMARY KEY, b INT,
FOREIGN KEY (b) REFERENCES t1(a)) ENGINE= MyISAM;
ALTER TABLE t1 RENAME INDEX b TO w, ADD FOREIGN KEY (b) REFERENCES t1(a);
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `w` (`b`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
DROP TABLE t1;
# WL#10761 : ALTER TABLE RENAME COLUMN
#
CREATE TABLE t2(a INT, b VARCHAR(30), c FLOAT) ENGINE=MyIsam;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) DEFAULT NULL,
  `b` varchar(30) DEFAULT NULL,
  `c` float DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
INSERT INTO t2 VALUES(1,'abcd',1.234);
ALTER TABLE t2 RENAME COLUMN a TO d, RENAME COLUMN b TO e, RENAME COLUMN c to f;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `d` int(11) DEFAULT NULL,
  `e` varchar(30) DEFAULT NULL,
  `f` float DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t2;
d	e	f
1	abcd	1.234
CREATE VIEW v1 AS SELECT d,e,f FROM t2;
CREATE TRIGGER trg1 BEFORE UPDATE on t2 FOR EACH ROW SET NEW.d=OLD.d + 10;
CREATE PROCEDURE sp1() INSERT INTO t2(d) VALUES(10);
ALTER TABLE t2 RENAME COLUMN d TO g;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `g` int(11) DEFAULT NULL,
  `e` varchar(30) DEFAULT NULL,
  `f` float DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SHOW CREATE VIEW v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t2`.`d` AS `d`,`t2`.`e` AS `e`,`t2`.`f` AS `f` from `t2`	utf8mb4	utf8mb4_0900_ai_ci
Warnings:
Warning	1356	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
SELECT * FROM v1;
ERROR HY000: View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
UPDATE t2 SET f = f + 10;
ERROR 42S22: Unknown column 'd' in 'OLD'
CALL sp1();
ERROR 42S22: Unknown column 'd' in 'field list'
DROP TRIGGER trg1;
DROP PROCEDURE sp1;
DROP TABLE t2;
DROP VIEW v1;
#
# Basic test coverage for ALGORITHM=INSTANT support on SQL-layer.
#
#
# 1) For MyISAM tables we support INSTANT algorithm for metadata-only
#    changes as well.
#
CREATE TABLE t1 (i INT, j ENUM('a', 'b'), KEY(i)) ENGINE=MyISAM;
ALTER TABLE t1 ALTER COLUMN i SET DEFAULT 10, ALGORITHM=INSTANT;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT '10',
  `j` enum('a','b') DEFAULT NULL,
  KEY `i` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 ALTER COLUMN i DROP DEFAULT, ALGORITHM=INSTANT;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11),
  `j` enum('a','b') DEFAULT NULL,
  KEY `i` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 MODIFY COLUMN j ENUM('a', 'b', 'c', 'd', 'e'), ALGORITHM=INSTANT;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11),
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `i` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 CHANGE COLUMN i k INT, ALGORITHM=INSTANT;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int(11) DEFAULT NULL,
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `i` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 RENAME INDEX i TO k, ALGORITHM=INSTANT;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int(11) DEFAULT NULL,
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 RENAME TO t2, ALGORITHM=INSTANT;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `k` int(11) DEFAULT NULL,
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#
# 2) And you can still use ALGORITHM=INPLACE for the same operations
#    for MyISAM tables too.
#
ALTER TABLE t2 RENAME TO t1, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int(11) DEFAULT NULL,
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 ALTER COLUMN k SET DEFAULT 11, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int(11) DEFAULT '11',
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 ALTER COLUMN k DROP DEFAULT, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int(11),
  `j` enum('a','b','c','d','e') DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 MODIFY COLUMN j ENUM('a', 'b', 'c', 'd', 'e', 'f', 'g'), ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `k` int(11),
  `j` enum('a','b','c','d','e','f','g') DEFAULT NULL,
  KEY `k` (`k`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 CHANGE COLUMN k i INT, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT NULL,
  `j` enum('a','b','c','d','e','f','g') DEFAULT NULL,
  KEY `k` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t1 RENAME INDEX k TO i, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` int(11) DEFAULT NULL,
  `j` enum('a','b','c','d','e','f','g') DEFAULT NULL,
  KEY `i` (`i`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#
# 3) Indeed, some options are not supported as INSTANT
#
ALTER TABLE t1 ADD COLUMN l INT, ALGORITHM=INSTANT;
ERROR 0A000: ALGORITHM=INSTANT is not supported for this operation. Try ALGORITHM=COPY/INPLACE.
ALTER TABLE t1 ALTER COLUMN i SET DEFAULT 12, DROP COLUMN j, ALGORITHM=INSTANT;
ERROR 0A000: ALGORITHM=INSTANT is not supported for this operation. Try ALGORITHM=COPY/INPLACE.
DROP TABLE t1;
# Tests added for coverage.
CREATE TABLE t1(fld1 VARCHAR(3), KEY(fld1)) ENGINE=MYISAM;
# Conversion of unpacked keys to packed keys reports
# error for INPLACE Alter.
ALTER TABLE t1 MODIFY fld1 VARCHAR(10), ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY.
# Succeeds with index rebuild.
ALTER TABLE t1 MODIFY fld1 VARCHAR(10), ALGORITHM=COPY;
DROP TABLE t1;
# Tests added for coverage.
CREATE TABLE t1(fld1 VARCHAR(3), KEY(fld1)) ENGINE=MYISAM;
# Conversion of unpacked keys to packed keys reports
# error for INPLACE Alter.
ALTER TABLE t1 MODIFY fld1 VARCHAR(10), ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY.
# Succeeds with index rebuild.
ALTER TABLE t1 MODIFY fld1 VARCHAR(10), ALGORITHM=COPY;
# Cleanup.
DROP TABLE t1;