CREATE TABLE t1 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
XA START 'x';
UPDATE t1 set a=2;
XA END 'x';
XA PREPARE 'x';
call mtr.add_suppression("Found 1 prepared XA transactions");
SELECT * FROM t1 LOCK IN SHARE MODE;
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT * FROM t1;
a
2
XA ROLLBACK 'x';
SELECT * FROM t1;
a
1
DROP TABLE t1;