include/master-slave.inc
[connection master]
connection master;
set binlog_alter_two_phase=true;
CREATE OR REPLACE TABLE tab (
a int PRIMARY KEY,
b varchar(50),
c varchar(50)
) CHARACTER SET=latin1 engine=innodb;
SET SESSION alter_algorithm='INSTANT';
ALTER TABLE tab MODIFY COLUMN b varchar(100);
SET SESSION alter_algorithm='NOCOPY';
ALTER TABLE tab MODIFY COLUMN c varchar(100);
SHOW CREATE TABLE tab;
Table	Create Table
tab	CREATE TABLE `tab` (
  `a` int(11) NOT NULL,
  `b` varchar(100) DEFAULT NULL,
  `c` varchar(100) DEFAULT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
include/show_binlog_events.inc
Log_name	Pos	Event_type	Server_id	End_log_pos	Info
master-bin.000001	#	Gtid	#	#	GTID #-#-#
master-bin.000001	#	Query	#	#	use `test`; CREATE OR REPLACE TABLE tab (
a int PRIMARY KEY,
b varchar(50),
c varchar(50)
) CHARACTER SET=latin1 engine=innodb
master-bin.000001	#	Gtid	#	#	GTID #-#-# START ALTER
master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN b varchar(100)
master-bin.000001	#	Gtid	#	#	GTID #-#-# COMMIT ALTER id=#
master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN b varchar(100)
master-bin.000001	#	Gtid	#	#	GTID #-#-# START ALTER
master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN c varchar(100)
master-bin.000001	#	Gtid	#	#	GTID #-#-# COMMIT ALTER id=#
master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN c varchar(100)
connection slave;
SHOW CREATE TABLE tab;
Table	Create Table
tab	CREATE TABLE `tab` (
  `a` int(11) NOT NULL,
  `b` varchar(100) DEFAULT NULL,
  `c` varchar(100) DEFAULT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
include/show_binlog_events.inc
Log_name	Pos	Event_type	Server_id	End_log_pos	Info
slave-bin.000001	#	Gtid	#	#	GTID #-#-#
slave-bin.000001	#	Query	#	#	use `test`; CREATE OR REPLACE TABLE tab (
a int PRIMARY KEY,
b varchar(50),
c varchar(50)
) CHARACTER SET=latin1 engine=innodb
slave-bin.000001	#	Gtid	#	#	GTID #-#-# START ALTER
slave-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN b varchar(100)
slave-bin.000001	#	Gtid	#	#	GTID #-#-# COMMIT ALTER id=#
slave-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN b varchar(100)
slave-bin.000001	#	Gtid	#	#	GTID #-#-# START ALTER
slave-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN c varchar(100)
slave-bin.000001	#	Gtid	#	#	GTID #-#-# COMMIT ALTER id=#
slave-bin.000001	#	Query	#	#	use `test`; ALTER TABLE tab MODIFY COLUMN c varchar(100)
connection master;
DROP TABLE tab;
connection slave;
include/rpl_end.inc