CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB;
connection node_2;
FLUSH TABLES WITH READ LOCK;
connection node_1;
ALTER TABLE t1 ADD COLUMN f2 INTEGER;
connection node_2;
UNLOCK TABLES;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `id` int(11) NOT NULL,
  `f2` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t1;