--source include/have_debug_sync.inc

# A scenario in which we choose the "joining" transaction (the
# one which added the last edge to form the cycle) con1 to be
# the victim

CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY) Engine=InnoDB;
INSERT INTO t1 (id) VALUES (1),(2),(3),(4),(5);

--connect (con1, localhost, root,,)
  BEGIN;
  SELECT * FROM t1 WHERE id = 1 FOR UPDATE;

--connect (con2, localhost, root,,)
  BEGIN;
  SELECT * FROM t1 WHERE id = 2 FOR UPDATE;
  SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con2_will_wait';
  --send SELECT * FROM t1 WHERE id = 1 FOR UPDATE; ROLLBACK

--connect (con3, localhost, root,,)
  BEGIN;
  SET DEBUG_SYNC = 'now WAIT_FOR con2_will_wait';
  SELECT * FROM t1 WHERE id = 3 FOR UPDATE;
  SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con3_will_wait';
  --send SELECT * FROM t1 WHERE id = 2 FOR UPDATE; ROLLBACK

--connect (con4, localhost, root,,)
  BEGIN;
  SET DEBUG_SYNC = 'now WAIT_FOR con3_will_wait';
  SELECT * FROM t1 WHERE id = 4 FOR UPDATE;
  SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con4_will_wait';
  --send SELECT * FROM t1 WHERE id = 3 FOR UPDATE; ROLLBACK

--connection con1
  SET DEBUG_SYNC = 'now WAIT_FOR con4_will_wait';
  --error ER_LOCK_DEADLOCK
  SELECT * FROM t1 WHERE id = 4 FOR UPDATE;

--connection con2
  --reap

--connection con3
  --reap

--connection con4
  --reap

--source suite/innodb/include/show_last_deadlock.inc


# A scenario in which we choose the transaction waiting for our
#  "joining" transaction, which is con2.

CREATE TABLE t2 (id INT NOT NULL PRIMARY KEY) Engine=InnoDB;
INSERT INTO t2 (id) VALUES (1),(2),(3),(4),(5);

--connection con1
  BEGIN;
  # Make con1 "heavy" so it is not chosen as victim
  SELECT * FROM t2 FOR UPDATE;
  SELECT * FROM t1 WHERE id = 1 FOR UPDATE;

--connection con2
  BEGIN;
  SELECT * FROM t1 WHERE id = 2 FOR UPDATE;
  SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con2_will_wait';
  --send SELECT * FROM t1 WHERE id = 1 FOR UPDATE; ROLLBACK

--connection con3
  BEGIN;
  SET DEBUG_SYNC = 'now WAIT_FOR con2_will_wait';
  SELECT * FROM t1 WHERE id = 3 FOR UPDATE;
  SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con3_will_wait';
  --send SELECT * FROM t1 WHERE id = 2 FOR UPDATE; ROLLBACK

--connection con4
  BEGIN;
  SET DEBUG_SYNC = 'now WAIT_FOR con3_will_wait';
  SELECT * FROM t1 WHERE id = 4 FOR UPDATE;
  SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con4_will_wait';
  --send SELECT * FROM t1 WHERE id = 3 FOR UPDATE; ROLLBACK

--connection con1
  SET DEBUG_SYNC = 'now WAIT_FOR con4_will_wait';
  SELECT * FROM t1 WHERE id = 4 FOR UPDATE;
  ROLLBACK;

--connection con2
  --error ER_LOCK_DEADLOCK
  --reap

--connection con3
  --reap

--connection con4
  --reap

--source suite/innodb/include/show_last_deadlock.inc

--connection default
--disconnect con1
--disconnect con2
--disconnect con3
--disconnect con4


DROP TABLE t2;
DROP TABLE t1;