Robert Haas <[email protected]> writes:
> On Thu, Jul 16, 2009 at 11:32 AM, Tom Lane<[email protected]> wrote:
>> So maybe a redesign of the equivalence-class joinclause mechanism is in
>> order. Still, this is unlikely to fix the fundamental issue that the
>> time for large join problems grows nonlinearly.
> Nonlinear is one thing, but this looks more like exponential. I
> understand that the standard planner is exponential; GEQO should not
> be.
Well, the equivclass code is new as of 8.3. It's possible that this
got broken relatively recently ...
regards, tom lane
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