connection node_2;
connection node_1;
CREATE TABLE parent(parent_id int not null AUTO_INCREMENT PRIMARY KEY,
parent_name varchar(80)) ENGINE=InnoDB;
CREATE TABLE child(child_id int not null AUTO_INCREMENT PRIMARY KEY,
child_name varchar(80),
child_parent_id int not null,
CONSTRAINT `fk_child_parent`
    FOREIGN KEY (child_parent_id) REFERENCES parent (parent_id)
ON DELETE CASCADE
ON UPDATE CASCADE) ENGINE=InnoDB;
INSERT INTO parent VALUES (1, 'first'),(2,'second'),(3,'foo'),(4,'tmp');
INSERT INTO child VALUES (NULL,'first_child',1);
INSERT INTO child VALUES (NULL,'second_child',1);
INSERT INTO child VALUES (NULL,'first_child2',2);
INSERT INTO child VALUES (NULL,'first_child3',2);
INSERT INTO child VALUES (NULL,'first_child4',3);
BEGIN;
UPDATE parent SET parent_name = 'bar' WHERE parent_id = 2;
connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1;
SET SESSION innodb_lock_wait_timeout=2;
UPDATE child SET child_parent_id = 5 where child_parent_id = 2;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection node_1;
COMMIT;
SELECT * FROM parent;
parent_id	parent_name
1	first
2	bar
3	foo
4	tmp
SELECT * FROM child;
child_id	child_name	child_parent_id
1	first_child	1
3	second_child	1
5	first_child2	2
7	first_child3	2
9	first_child4	3
connection node_2;
SELECT * FROM parent;
parent_id	parent_name
1	first
2	bar
3	foo
4	tmp
SELECT * FROM child;
child_id	child_name	child_parent_id
1	first_child	1
3	second_child	1
5	first_child2	2
7	first_child3	2
9	first_child4	3
DROP TABLE child, parent;
disconnect node_1a;