# Test NOWAIT with multixact locks.

setup
{
  CREATE TABLE foo (
	id int PRIMARY KEY,
	data text NOT NULL
  );
  INSERT INTO foo VALUES (1, 'x');
}

teardown
{
  DROP TABLE foo;
}

session "s1"
setup		{ BEGIN; }
step "s1a"	{ SELECT * FROM foo FOR SHARE NOWAIT; }
step "s1b"	{ COMMIT; }

session "s2"
setup		{ BEGIN; }
step "s2a"	{ SELECT * FROM foo FOR SHARE NOWAIT; }
step "s2b"	{ SELECT * FROM foo FOR UPDATE NOWAIT; }
step "s2c"	{ COMMIT; }

# s1 and s2 both get SHARE lock, creating a multixact lock, then s2
# tries to upgrade to UPDATE but aborts because it cannot acquire a
# multi-xact lock
permutation "s1a" "s2a" "s2b" "s1b" "s2c"
# the same but with the SHARE locks acquired in a different order, so
# s2 again aborts because it can't acquired a multi-xact lock
permutation "s2a" "s1a" "s2b" "s1b" "s2c"
# s2 acquires SHARE then UPDATE, then s1 tries to acquire SHARE but
# can't so aborts because it can't acquire a regular lock
permutation "s2a" "s2b" "s1a" "s1b" "s2c"