SET NAMES utf8;
CREATE TABLE t1 (
c1 INT PRIMARY KEY, c2 INT DEFAULT 1, ct TEXT,
INDEX(c2))
ENGINE=InnoDB;
INSERT INTO t1 SET c1=1;
CREATE TABLE sys_tables SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES
WHERE NAME LIKE 'test/t%';
CREATE TABLE sys_indexes SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
CREATE TABLE t1p LIKE t1;
CREATE TABLE t1c (c1 INT PRIMARY KEY, c2 INT, c3 INT, INDEX(c2), INDEX(c3),
CONSTRAINT t1c2 FOREIGN KEY (c2) REFERENCES t1(c2),
CONSTRAINT t1c3 FOREIGN KEY (c3) REFERENCES t1p(c2))
ENGINE=InnoDB;
CREATE TABLE sys_foreign SELECT i.*
FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN i
WHERE FOR_NAME LIKE 'test/t%';
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c2	0
test/t1c3	c3	c2	0
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c2	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c2
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c2	0
test/t1c3	c3	c2	0
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT '1',
  `ct` text,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1 ALTER c2 DROP DEFAULT;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` int(11) NOT NULL,
  `c2` int(11),
  `ct` text,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c2	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c2
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c2	0
test/t1c3	c3	c2	0
ALTER TABLE t1 CHANGE c2 c2 INT AFTER c1;
ALTER TABLE t1 CHANGE c1 c1 INT FIRST;
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c2	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c2
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c2	0
test/t1c3	c3	c2	0
ALTER TABLE t1 CHANGE C2 c3 INT;
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c3	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c3
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c3	0
test/t1c3	c3	c2	0
ALTER TABLE t1 CHANGE c3 C INT;
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
C	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	C
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	C	0
test/t1c3	c3	c2	0
ALTER TABLE t1 CHANGE C Cöŀumň_TWO INT;
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	Cöŀumň_TWO	0
test/t1c3	c3	c2	0
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
Cöŀumň_TWO	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	Cöŀumň_TWO
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	Cöŀumň_TWO	0
test/t1c3	c3	c2	0
ALTER TABLE t1 CHANGE cöĿǖmň_two c3 INT;
ERROR 42S22: Unknown column 'cöĿǖmň_two' in 't1'
ALTER TABLE t1 CHANGE cÖĿUMŇ_two c3 INT, RENAME TO t3;
SELECT st.NAME, i.NAME
FROM sys_tables st INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_TABLES i
ON i.TABLE_ID=st.TABLE_ID;
NAME	NAME
test/t1	test/t3
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `c1` int(11) NOT NULL DEFAULT '0',
  `c3` int(11) DEFAULT NULL,
  `ct` text,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c3`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SHOW CREATE TABLE t1c;
Table	Create Table
t1c	CREATE TABLE `t1c` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`),
  KEY `c3` (`c3`),
  CONSTRAINT `t1c2` FOREIGN KEY (`c2`) REFERENCES `t3` (`c3`),
  CONSTRAINT `t1c3` FOREIGN KEY (`c3`) REFERENCES `t1p` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t3 CHANGE c3
`12345678901234567890123456789012345678901234567890123456789012345` INT;
ERROR 42000: Identifier name '12345678901234567890123456789012345678901234567890123456789012345' is too long
ALTER TABLE t3 CHANGE c3
`1234567890123456789012345678901234567890123456789012345678901234` INT;
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `c1` int(11) NOT NULL DEFAULT '0',
  `1234567890123456789012345678901234567890123456789012345678901234` int(11) DEFAULT NULL,
  `ct` text,
  PRIMARY KEY (`c1`),
  KEY `c2` (`1234567890123456789012345678901234567890123456789012345678901234`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t3 CHANGE
`1234567890123456789012345678901234567890123456789012345678901234`
`倀倁倂倃倄倅倆倇倈倉倊個倌倍倎倏倐們倒倓倔倕倖倗倘候倚倛倜倝倞借倠倡倢倣値倥倦倧倨倩倪倫倬倭倮倯倰倱倲倳倴倵倶倷倸倹债倻值倽倾倿偀` INT;
ERROR 42000: Identifier name '倀倁倂倃倄倅倆倇倈倉倊個倌倍倎倏倐們倒倓倔倕倖倗倘候倚倛倜倝倞借倠' is too long
ALTER TABLE t3 CHANGE
`1234567890123456789012345678901234567890123456789012345678901234`
`倀倁倂倃倄倅倆倇倈倉倊個倌倍倎倏倐們倒倓倔倕倖倗倘候倚倛倜倝倞借倠倡倢倣値倥倦倧倨倩倪倫倬倭倮倯倰倱倲倳倴倵倶倷倸倹债倻值倽倾倿ä` INT;
ERROR 42000: Identifier name '倀倁倂倃倄倅倆倇倈倉倊個倌倍倎倏倐們倒倓倔倕倖倗倘候倚倛倜倝倞借倠' is too long
ALTER TABLE t3 CHANGE
`1234567890123456789012345678901234567890123456789012345678901234`
`倀倁倂倃倄倅倆倇倈倉倊個倌倍倎倏倐們倒倓倔倕倖倗倘候倚倛倜倝倞借倠倡倢倣値倥倦倧倨倩倪倫倬倭倮倯倰倱倲倳倴倵倶倷倸倹债倻值倽倾ä` INT;
ALTER TABLE t3 CHANGE
`倀倁倂倃倄倅倆倇倈倉倊個倌倍倎倏倐們倒倓倔倕倖倗倘候倚倛倜倝倞借倠倡倢倣値倥倦倧倨倩倪倫倬倭倮倯倰倱倲倳倴倵倶倷倸倹债倻值倽倾Ä`
c3 INT;
ALTER TABLE t3 CHANGE c3 𐌀𐌁𐌂𐌃𐌄𐌅𐌆𐌇𐌈𐌉𐌊𐌋𐌌𐌍𐌎𐌏𐌐𐌑𐌒𐌓𐌔𐌕𐌖𐌗𐌘𐌙𐌚𐌛𐌜 INT;
ERROR HY000: Invalid utf8 character string: '\xF0\x90\x8C\x80\xF0\x90\x8C\x81\xF0\x90\x8C\x82\xF0\x90\x8C\x83'
ALTER TABLE t3 CHANGE c3 😲 INT;
ERROR HY000: Invalid utf8 character string: '\xF0\x9F\x98\xB2'
ALTER TABLE t3 RENAME TO t2;
SELECT st.NAME, i.NAME
FROM sys_tables st INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_TABLES i
ON i.TABLE_ID=st.TABLE_ID;
NAME	NAME
test/t1	test/t2
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` int(11) NOT NULL DEFAULT '0',
  `c3` int(11) DEFAULT NULL,
  `ct` text,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c3`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
RENAME TABLE t2 TO t1;
SELECT st.NAME, i.NAME
FROM sys_tables st INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_TABLES i
ON i.TABLE_ID=st.TABLE_ID;
NAME	NAME
test/t1	test/t1
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c3	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c3
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c3	0
test/t1c3	c3	c2	0
ALTER TABLE t1 DROP INDEX c2;
ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
ALTER TABLE t1 DROP INDEX c4;
ERROR 42000: Can't DROP 'c4'; check that column/key exists
ALTER TABLE t1c DROP FOREIGN KEY c2;
ERROR 42000: Can't DROP 'c2'; check that column/key exists
ALTER TABLE t1c DROP FOREIGN KEY t1c2, DROP FOREIGN KEY c2;
ERROR 42000: Can't DROP 'c2'; check that column/key exists
ALTER TABLE t1c DROP FOREIGN KEY t1c2, DROP FOREIGN KEY c2, DROP INDEX c2;
ERROR 42000: Can't DROP 'c2'; check that column/key exists
ALTER TABLE t1c DROP INDEX c2;
ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
ALTER TABLE t1c DROP FOREIGN KEY ẗ1C2;
ERROR 42000: Can't DROP 'ẗ1C2'; check that column/key exists
SHOW CREATE TABLE t1c;
Table	Create Table
t1c	CREATE TABLE `t1c` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`),
  KEY `c3` (`c3`),
  CONSTRAINT `t1c2` FOREIGN KEY (`c2`) REFERENCES `t1` (`c3`),
  CONSTRAINT `t1c3` FOREIGN KEY (`c3`) REFERENCES `t1p` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SET foreign_key_checks=0;
DROP TABLE t1p;
SET foreign_key_checks=1;
SHOW CREATE TABLE t1c;
Table	Create Table
t1c	CREATE TABLE `t1c` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`),
  KEY `c3` (`c3`),
  CONSTRAINT `t1c2` FOREIGN KEY (`c2`) REFERENCES `t1` (`c3`),
  CONSTRAINT `t1c3` FOREIGN KEY (`c3`) REFERENCES `t1p` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c3	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c3
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c3	0
test/t1c3	c3	c2	0
CREATE TABLE t1p (c1 INT PRIMARY KEY, c2 INT, INDEX(c2)) ENGINE=InnoDB;
ALTER TABLE t1c DROP INDEX C2, DROP INDEX C3;
ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
ALTER TABLE t1c DROP INDEX C3;
ERROR HY000: Cannot drop index 'c3': needed in a foreign key constraint
SET foreign_key_checks=0;
ALTER TABLE t1c DROP INDEX C3;
SET foreign_key_checks=1;
SHOW CREATE TABLE t1c;
Table	Create Table
t1c	CREATE TABLE `t1c` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`),
  CONSTRAINT `t1c2` FOREIGN KEY (`c2`) REFERENCES `t1` (`c3`),
  CONSTRAINT `t1c3` FOREIGN KEY (`c3`) REFERENCES `t1p` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c3	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c3
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c3	0
test/t1c3	c3	c2	0
ALTER TABLE t1c DROP FOREIGN KEY t1C3;
SHOW CREATE TABLE t1c;
Table	Create Table
t1c	CREATE TABLE `t1c` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `c2` (`c2`),
  CONSTRAINT `t1c2` FOREIGN KEY (`c2`) REFERENCES `t1` (`c3`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c3	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c3
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
test/t1c2	c2	c3	0
ALTER TABLE t1c DROP INDEX c2, DROP FOREIGN KEY t1C2;
SHOW CREATE TABLE t1c;
Table	Create Table
t1c	CREATE TABLE `t1c` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c3	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
c2	0	c3
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
ALTER TABLE t1 DROP INDEX c2, CHANGE c3 c2 INT;
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
c1	0	6	1283	4
c2	1	6	1027	4
ct	2	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	c1
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
CREATE TABLE t1o LIKE t1;
ALTER TABLE t1 ADD FULLTEXT INDEX (ct),
CHANGE c1 pk INT, ALTER c2 SET DEFAULT 42, RENAME TO tt,
ALGORITHM=INPLACE, LOCK=NONE;
ERROR 0A000: LOCK=NONE is not supported. Reason: Fulltext index creation requires a lock. Try LOCK=SHARED.
ALTER TABLE t1 ADD FULLTEXT INDEX (ct),
CHANGE c1 pk INT, ALTER c2 SET DEFAULT 42, RENAME TO tt,
ALGORITHM=INPLACE, LOCK=SHARED;
Warnings:
Warning	124	InnoDB rebuilding table to add column FTS_DOC_ID
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
SHOW CREATE TABLE tt;
Table	Create Table
tt	CREATE TABLE `tt` (
  `pk` int(11) NOT NULL DEFAULT '0',
  `c2` int(11) DEFAULT '42',
  `ct` text,
  PRIMARY KEY (`pk`),
  FULLTEXT KEY `ct` (`ct`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1o CHANGE c1 dB_row_Id INT, ALGORITHM=COPY;
ERROR 42000: Incorrect column name 'dB_row_Id'
ALTER TABLE t1o CHANGE c1 dB_row_Id INT, ALGORITHM=INPLACE;
ERROR 42000: Incorrect column name 'DB_ROW_ID'
ALTER TABLE t1o CHANGE c1 DB_TRX_ID INT;
ERROR 42000: Incorrect column name 'DB_TRX_ID'
ALTER TABLE t1o CHANGE c1 db_roll_ptr INT;
ERROR 42000: Incorrect column name 'DB_ROLL_PTR'
ALTER TABLE t1o ADD COLUMN DB_TRX_ID INT;
ERROR 42000: Incorrect column name 'DB_TRX_ID'
ALTER TABLE t1o ADD COLUMN db_roll_ptr INT;
ERROR 42000: Incorrect column name 'db_roll_ptr'
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), ADD COLUMN FTS_DOC_ID BIGINT;
ERROR HY000: Column 'FTS_DOC_ID' is of wrong type for an InnoDB FULLTEXT index
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED;
ERROR HY000: Column 'FTS_DOC_ID' is of wrong type for an InnoDB FULLTEXT index
ALTER TABLE t1o ADD FULLTEXT INDEX(ct),
ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED NOT NULL;
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), ADD COLUMN FTS_DOC_ID INT;
ERROR 42S21: Duplicate column name 'FTS_DOC_ID'
ALTER TABLE t1o DROP COLUMN FTS_DOC_ID, ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot drop or rename FTS_DOC_ID. Try ALGORITHM=COPY.
ALTER TABLE t1o DROP COLUMN FTS_DOC_ID, DROP INDEX ct, ALGORITHM=INPLACE;
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), ADD COLUMN cu TEXT;
Warnings:
Warning	124	InnoDB rebuilding table to add column FTS_DOC_ID
ALTER TABLE t1o ADD FULLTEXT INDEX(cu), ADD COLUMN FTS_DOC_ID BIGINT,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: InnoDB presently supports one FULLTEXT index creation at a time. Try ALGORITHM=COPY.
ALTER TABLE t1o ADD FULLTEXT INDEX(cu), ADD COLUMN FTS_DOC_ID BIGINT;
ERROR 42000: Incorrect column name 'FTS_DOC_ID'
ALTER TABLE t1o ADD FULLTEXT INDEX(cu), ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: InnoDB presently supports one FULLTEXT index creation at a time. Try ALGORITHM=COPY.
ALTER TABLE t1o ADD FULLTEXT INDEX(cu), ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED;
ERROR 42000: Incorrect column name 'FTS_DOC_ID'
ALTER TABLE t1o ADD FULLTEXT INDEX(cu),
ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED NOT NULL, ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: InnoDB presently supports one FULLTEXT index creation at a time. Try ALGORITHM=COPY.
ALTER TABLE t1o ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED NOT NULL,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: InnoDB presently supports one FULLTEXT index creation at a time. Try ALGORITHM=COPY.
ALTER TABLE t1o ADD COLUMN FTS_DOC_ID BIGINT UNSIGNED NOT NULL;
ALTER TABLE t1o DROP COLUMN FTS_DOC_ID, ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot drop or rename FTS_DOC_ID. Try ALGORITHM=COPY.
ALTER TABLE t1o DROP COLUMN FTS_DOC_ID;
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), CHANGE c1 FTS_DOC_ID INT,
ALGORITHM=COPY;
ERROR 42000: Incorrect column name 'FTS_DOC_ID'
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), CHANGE c1 FTS_DOC_ID INT,
ALGORITHM=INPLACE;
ERROR 42000: Incorrect column name 'FTS_DOC_ID'
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), CHANGE c1 FTS_Doc_ID INT,
ALGORITHM=INPLACE;
ERROR 42000: Incorrect column name 'FTS_DOC_ID'
ALTER TABLE t1o ADD FULLTEXT INDEX(ct),
CHANGE c1 FTS_DOC_ID BIGINT UNSIGNED NOT NULL,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot change column type INPLACE. Try ALGORITHM=COPY.
CREATE TABLE t1n LIKE t1o;
ALTER TABLE t1n ADD FULLTEXT INDEX(ct);
ALTER TABLE t1n CHANGE c1 Fts_DOC_ID INT, ALGORITHM=INPLACE;
ERROR 42000: Incorrect column name 'FTS_DOC_ID'
ALTER TABLE t1n CHANGE c1 Fts_DOC_ID INT, ALGORITHM=COPY;
ERROR 42000: Incorrect column name 'Fts_DOC_ID'
ALTER TABLE t1n CHANGE FTS_DOC_ID c11 INT, ALGORITHM=INPLACE;
ERROR 42S22: Unknown column 'FTS_DOC_ID' in 't1n'
ALTER TABLE t1n CHANGE c1 FTS_DOC_ïD INT, ALGORITHM=INPLACE;
ALTER TABLE t1n CHANGE FTS_DOC_ÏD c1 INT, ALGORITHM=INPLACE;
ALTER TABLE t1n CHANGE c1 c2 INT, CHANGE c2 ct INT, CHANGE ct c1 TEXT,
ALGORITHM=INPLACE;
SHOW CREATE TABLE t1n;
Table	Create Table
t1n	CREATE TABLE `t1n` (
  `c2` int(11) NOT NULL DEFAULT '0',
  `ct` int(11) DEFAULT NULL,
  `c1` text,
  `cu` text,
  PRIMARY KEY (`c2`),
  FULLTEXT KEY `ct` (`c1`),
  FULLTEXT KEY `ct_2` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1n CHANGE c2 c1 INT, CHANGE ct c2 INT, CHANGE c1 ct TEXT,
ALGORITHM=COPY;
SHOW CREATE TABLE t1n;
Table	Create Table
t1n	CREATE TABLE `t1n` (
  `c1` int(11) NOT NULL DEFAULT '0',
  `c2` int(11) DEFAULT NULL,
  `ct` text,
  `cu` text,
  PRIMARY KEY (`c1`),
  FULLTEXT KEY `ct` (`ct`),
  FULLTEXT KEY `ct_2` (`ct`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1n ADD INDEX(c2), CHANGE c2 c4 INT, ALGORITHM=INPLACE;
ERROR 42000: Key column 'c2' doesn't exist in table
ALTER TABLE t1n ADD INDEX(c2), CHANGE c2 c4 INT, ALGORITHM=COPY;
ERROR 42000: Key column 'c2' doesn't exist in table
ALTER TABLE t1n ADD INDEX(c4), CHANGE c2 c4 INT, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1n;
Table	Create Table
t1n	CREATE TABLE `t1n` (
  `c1` int(11) NOT NULL DEFAULT '0',
  `c4` int(11) DEFAULT NULL,
  `ct` text,
  `cu` text,
  PRIMARY KEY (`c1`),
  KEY `c4` (`c4`),
  FULLTEXT KEY `ct` (`ct`),
  FULLTEXT KEY `ct_2` (`ct`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1n DROP INDEX c4;
ALTER TABLE t1n CHANGE c4 c1 INT, ADD INDEX(c1), ALGORITHM=INPLACE;
ERROR 42S21: Duplicate column name 'c1'
ALTER TABLE t1n CHANGE c4 c11 INT, ADD INDEX(c11), ALGORITHM=INPLACE;
SHOW CREATE TABLE t1n;
Table	Create Table
t1n	CREATE TABLE `t1n` (
  `c1` int(11) NOT NULL DEFAULT '0',
  `c11` int(11) DEFAULT NULL,
  `ct` text,
  `cu` text,
  PRIMARY KEY (`c1`),
  KEY `c11` (`c11`),
  FULLTEXT KEY `ct` (`ct`),
  FULLTEXT KEY `ct_2` (`ct`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t1n;
ALTER TABLE t1o MODIFY c1 BIGINT UNSIGNED NOT NULL, DROP INDEX ct,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot change column type INPLACE. Try ALGORITHM=COPY.
ALTER TABLE t1o MODIFY c1 BIGINT UNSIGNED NOT NULL, DROP INDEX ct;
ALTER TABLE t1o CHANGE c1 FTS_DOC_ID BIGINT UNSIGNED NOT NULL,
ALGORITHM=INPLACE;
ALTER TABLE t1o ADD FULLTEXT INDEX(ct), ALGORITHM=INPLACE;
ALTER TABLE t1o CHANGE FTS_DOC_ID foo_id BIGINT UNSIGNED NOT NULL,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot drop or rename FTS_DOC_ID. Try ALGORITHM=COPY.
SELECT sc.pos FROM information_schema.innodb_sys_columns sc
INNER JOIN information_schema.innodb_sys_tables st
ON sc.TABLE_ID=st.TABLE_ID
WHERE st.NAME='test/t1o' AND sc.NAME='FTS_DOC_ID';
pos
0
SHOW CREATE TABLE t1o;
Table	Create Table
t1o	CREATE TABLE `t1o` (
  `FTS_DOC_ID` bigint(20) unsigned NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `ct` text,
  `cu` text,
  PRIMARY KEY (`FTS_DOC_ID`),
  FULLTEXT KEY `ct` (`ct`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1o CHANGE FTS_DOC_ID foo_id BIGINT UNSIGNED NOT NULL,
DROP INDEX ct, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1o;
Table	Create Table
t1o	CREATE TABLE `t1o` (
  `foo_id` bigint(20) unsigned NOT NULL,
  `c2` int(11) DEFAULT NULL,
  `ct` text,
  `cu` text,
  PRIMARY KEY (`foo_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t1c, t1p, sys_tables, sys_indexes, sys_foreign;
CREATE TABLE sys_tables SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES
WHERE NAME='test/t1o';
CREATE TABLE sys_indexes SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
CREATE TABLE sys_foreign SELECT i.*
FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN i WHERE FOR_NAME='test/t1o';
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
foo_id	0	6	1800	8
c2	1	6	1027	4
ct	2	5	524540	10
cu	3	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	foo_id
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
ALTER TABLE t1o ADD UNIQUE INDEX FTS_DOC_ID_INDEX(FTS_DOC_ID),
ADD FULLTEXT INDEX(ct),
CHANGE foo_id FTS_DOC_ID BIGINT UNSIGNED NOT NULL;
ALTER TABLE t1o DROP INDEX ct, DROP INDEX FTS_DOC_ID_INDEX,
CHANGE FTS_DOC_ID foo_id BIGINT UNSIGNED NOT NULL;
ALTER TABLE t1o ADD UNIQUE INDEX FTS_DOC_ID_INDEX(foo_id);
ALTER TABLE t1o CHANGE foo_id FTS_DOC_ID BIGINT UNSIGNED NOT NULL,
ADD FULLTEXT INDEX(ct);
ALTER TABLE t1o CHANGE FTS_DOC_ID foo_id BIGINT UNSIGNED NOT NULL,
ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot drop or rename FTS_DOC_ID. Try ALGORITHM=COPY.
DROP TABLE sys_indexes;
CREATE TABLE sys_indexes SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
NAME	POS	MTYPE	PRTYPE	LEN
FTS_DOC_ID	0	6	1800	8
c2	1	6	1027	4
ct	2	5	524540	10
cu	3	5	524540	10
SELECT si.NAME,i.POS,i.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS i
INNER JOIN sys_indexes si ON i.INDEX_ID=si.INDEX_ID;
NAME	POS	NAME
PRIMARY	0	FTS_DOC_ID
FTS_DOC_ID_INDEX	0	FTS_DOC_ID
ct	0	ct
SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
INNER JOIN sys_foreign sf ON i.ID = sf.ID;
ID	FOR_COL_NAME	REF_COL_NAME	POS
DROP TABLE tt, t1o, sys_tables, sys_indexes, sys_foreign;
CREATE TABLE t (t TEXT, FULLTEXT(t)) ENGINE=InnoDB;
DROP INDEX t ON t;
SELECT sc.pos, sc.NAME FROM information_schema.innodb_sys_columns sc
INNER JOIN information_schema.innodb_sys_tables st
ON sc.TABLE_ID=st.TABLE_ID
WHERE st.NAME='test/t';
pos	NAME
0	t
1	FTS_DOC_ID
ALTER TABLE t ROW_FORMAT=REDUNDANT, ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: InnoDB presently supports one FULLTEXT index creation at a time. Try ALGORITHM=COPY.
ALTER TABLE t ROW_FORMAT=REDUNDANT;
SELECT sc.pos, sc.NAME FROM information_schema.innodb_sys_columns sc
INNER JOIN information_schema.innodb_sys_tables st
ON sc.TABLE_ID=st.TABLE_ID
WHERE st.NAME='test/t';
pos	NAME
0	t
DROP TABLE t;