1
CREATE TABLE t1 (a int, b int, PRIMARY KEY (a,b)) ENGINE=InnoDB;
2
INSERT INTO t1 (a,b) VALUES (1070109,99);
3
CREATE TABLE t2 (b int, a int, PRIMARY KEY (b)) ENGINE=InnoDB;
4
INSERT INTO t2 (b,a) VALUES (7,1070109);
9
SELECT b FROM t2 WHERE b=7 FOR UPDATE;
13
DELETE FROM t1 WHERE a=(SELECT a FROM t2 WHERE b=7);
14
ERROR HY000: Lock wait timeout exceeded; try restarting transaction