drop table if exists t2; create table t2( i0 int(11) DEFAULT NULL , i1 int(11) DEFAULT NULL , i2 int(11) DEFAULT NULL ) engine=xengine; Warnings: Warning 1681 Integer display width is deprecated and will be removed in a future release. Warning 1681 Integer display width is deprecated and will be removed in a future release. Warning 1681 Integer display width is deprecated and will be removed in a future release. SET DEBUG_SYNC= 'xengine.inplace_create_sk_scan_base_begin SIGNAL start_dml_insert WAIT_FOR start_dml_insert_finish'; alter table t2 add index idx1(i1), add index idx2(i2) ; # Establish connection con1 (user=root) # Switch to connection con1 SET DEBUG_SYNC= 'now WAIT_FOR start_dml_insert'; insert into t2 values(1,1,1); SET DEBUG_SYNC= 'now SIGNAL start_dml_insert_finish'; # Switch to connection default select *from t2 where i1 = 1; i0 i1 i2 1 1 1 select * from t2; i0 i1 i2 1 1 1 drop table t2;