xa rollback 'xid2';
ERROR XAE04: XAER_NOTA: Unknown XID
drop table if exists t1;
Warnings:
Note	1051	Unknown table 'test.t1'
create table t1(a int)engine=innodb;
rollback;
xa start 'xid2';
insert into `t1` values (1);
savepoint `sv1`;
xa end 'xid2';
start transaction;
ERROR XAE07: XAER_RMFAIL: The command cannot be executed when global transaction is in the  IDLE state
xa prepare 'xid2';
release savepoint `sv1`;
xa commit 'xid2';
drop table t1;