drop table if exists t; Warnings: Note 1051 Unknown table 'test.t' create table t ( a int, b int, c varchar(12249) collate latin1_bin, d datetime, e int, f int, g blob, h int, i int, key (b,e), key (h,b) ) engine=xengine partition by linear hash (i) partitions 8 ; insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); insert into t values (1,1,'a',now(),1,1,'a',1,1); select i from t group by h; i 1 select i from t group by h; i 1 drop table t;