Kenneth Marshall <ktm(at)rice(dot)edu> writes:
> Without an order by, the order is not defined.
Yeah, but with the same data and the same software it should generally
give the same result; as evidenced by the fact that these same
regression tests have worked for most people for years. There's
something odd happening on Emmanuel's machine. Maybe he's changed
the hashing algorithms or some planner cost parameters?
regards, tom lane