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# While requesting nowait lock, if the lock requested should
# be inserted in front of some waiter, check to see if the lock
# conflicts with already-held locks or the requests before
# the waiter. If not, then just grant myself the requested
# lock immediately. Test this scenario.
setup
{
CREATE TABLE a1 ();
}
teardown
{
DROP TABLE a1;
}
session s1
setup { BEGIN; }
step s1a { LOCK TABLE a1 IN ACCESS EXCLUSIVE MODE; }
step s1b { LOCK TABLE a1 IN SHARE ROW EXCLUSIVE MODE NOWAIT; }
step s1c { COMMIT; }
session s2
setup { BEGIN; }
step s2a { LOCK TABLE a1 IN EXCLUSIVE MODE; }
step s2c { COMMIT; }
permutation s1a s2a s1b s1c s2c
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