create table t2(id int,a varchar(255),b varchar(255),key(a))engine=aria row_format=dynamic transactional=0; Table Op Msg_type Msg_text test.t2 check status OK Table Op Msg_type Msg_text test.t2 check status OK check table t2 extended; Table Op Msg_type Msg_text test.t2 check status OK drop table t2;