DROP TABLE IF EXISTS t1,t2; CREATE TABLE t1 (a , b ) ENGINE= ; INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'); CREATE TABLE t2 (a , b ) ENGINE= ; CHECK TABLE t1; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a,b) VALUES (3,'c'); INSERT INTO t2 (a,b) VALUES (4,'d'); CHECK TABLE t1, t2 FOR UPGRADE; Table Op Msg_type Msg_text test.t1 check status OK test.t2 check status OK INSERT INTO t2 (a,b) VALUES (5,'e'); CHECK TABLE t2 QUICK; Table Op Msg_type Msg_text test.t2 check status OK INSERT INTO t1 (a,b) VALUES (6,'f'); CHECK TABLE t1 FAST; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a,b) VALUES (7,'g'); INSERT INTO t2 (a,b) VALUES (8,'h'); CHECK TABLE t2, t1 MEDIUM; Table Op Msg_type Msg_text test.t2 check status OK test.t1 check status OK INSERT INTO t1 (a,b) VALUES (9,'i'); INSERT INTO t2 (a,b) VALUES (10,'j'); CHECK TABLE t1, t2 EXTENDED; Table Op Msg_type Msg_text test.t1 check status OK test.t2 check status OK INSERT INTO t1 (a,b) VALUES (11,'k'); CHECK TABLE t1 CHANGED; Table Op Msg_type Msg_text test.t1 check status OK DROP TABLE t1, t2; CREATE TABLE t1 (a , (a)) ENGINE= ; INSERT INTO t1 (a) VALUES (1),(2),(5); CHECK TABLE t1; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a) VALUES (6),(8),(12); CHECK TABLE t1 FOR UPGRADE; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a) VALUES (13),(15),(16); CHECK TABLE t1 QUICK; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a) VALUES (17),(120),(132); CHECK TABLE t1 FAST; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a) VALUES (801),(900),(7714); CHECK TABLE t1 MEDIUM; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a) VALUES (8760),(10023),(12000); CHECK TABLE t1 EXTENDED; Table Op Msg_type Msg_text test.t1 check status OK INSERT INTO t1 (a) VALUES (13345),(24456),(78302),(143028); CHECK TABLE t1 CHANGED; Table Op Msg_type Msg_text test.t1 check status OK DROP TABLE t1;