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DROP TABLE IF EXISTS t2; CREATE TABLE t2(c1 BIT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bit(1) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 BIT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bit(1) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TINYINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyint(4) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 TINYINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyint(4) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 SMALLINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` smallint(6) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 SMALLINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` smallint(6) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 MEDIUMINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumint(9) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 MEDIUMINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumint(9) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 INT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 INT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 INTEGER NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 INTEGER NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 BIGINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bigint(20) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 BIGINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bigint(20) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 REAL NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 REAL NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 DOUBLE NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 DOUBLE NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 FLOAT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` float NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 FLOAT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` float DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 DECIMAL NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 DECIMAL NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 NUMERIC NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 NUMERIC NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 DATE NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` date NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 DATE NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` date DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TIME NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` time NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 TIME NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` time DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TIMESTAMP NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 TIMESTAMP NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` timestamp NULL DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 YEAR NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` year(4) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 YEAR NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` year(4) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TINYBLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyblob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 TINYBLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyblob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 BLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` blob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 BLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` blob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 MEDIUMBLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumblob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 MEDIUMBLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumblob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 LONGBLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longblob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 LONGBLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longblob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TINYTEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinytext NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 TINYTEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinytext ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` text NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 TEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` text ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 MEDIUMTEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumtext NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 MEDIUMTEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumtext ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 LONGTEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longtext NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 MODIFY c1 LONGTEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longtext ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 BIT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bit(1) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 BIT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bit(1) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TINYINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyint(4) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 TINYINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyint(4) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 SMALLINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` smallint(6) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 SMALLINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` smallint(6) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 MEDIUMINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumint(9) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 MEDIUMINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumint(9) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 INT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 INT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 INTEGER NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 INTEGER NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 BIGINT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bigint(20) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 BIGINT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` bigint(20) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 REAL NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 REAL NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 DOUBLE NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 DOUBLE NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 FLOAT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` float NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 FLOAT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` float DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 DECIMAL NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 DECIMAL NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 NUMERIC NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 NUMERIC NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 DATE NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` date NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 DATE NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` date DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TIME NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` time NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 TIME NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` time DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TIMESTAMP NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 TIMESTAMP NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` timestamp NULL DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 YEAR NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` year(4) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 YEAR NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` year(4) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TINYBLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyblob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 TINYBLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinyblob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 BLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` blob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 BLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` blob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 MEDIUMBLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumblob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 MEDIUMBLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumblob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 LONGBLOB NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longblob NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 LONGBLOB NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longblob ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TINYTEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinytext NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 TINYTEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` tinytext ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 TEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` text NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 TEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` text ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 MEDIUMTEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumtext NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 MEDIUMTEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` mediumtext ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test CREATE TABLE t2(c1 LONGTEXT NOT NULL); SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longtext NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t2 CHANGE c1 c1 LONGTEXT NULL; SHOW TABLES; Tables_in_test t2 SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `c1` longtext ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t2; SHOW TABLES; Tables_in_test