drop table if exists t1;
SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
CREATE TABLE t1 (c1 INT PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (null);
INSERT INTO t1 VALUES (null);
ALTER TABLE t1 CHANGE c1 d1 INT NOT NULL AUTO_INCREMENT;
SELECT * FROM t1;
d1
1
2
SELECT * FROM t1;
d1
1
2
INSERT INTO t1 VALUES(null);
ALTER TABLE t1 AUTO_INCREMENT = 3;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `d1` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`d1`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=latin1
INSERT INTO t1 VALUES(null);
SELECT * FROM t1;
d1
1
2
3
4
DROP TABLE t1;