|From:||Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>|
|To:||"Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>|
|Cc:||"Simon Riggs" <simon(at)2ndquadrant(dot)com>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, pgsql-hackers(at)postgresql(dot)org|
|Subject:||Re: WIP: patch to create explicit support for semi and anti joins|
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"Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> writes:
> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> I can't yet *prove* that I can get better estimates
>> with the added info, but if not, that just means I need to rethink what
>> to pass down exactly.
> I'll see if I can do some testing here to confirm plan improvements
> and check estimate accuracy. This is only on the trunk, not any
> stable branches? I assume that effort should wait until you have a
> candidate for the estimate improvements?
Yeah. If you feel like it you can test what I just committed, but it's
definitely not where I expect to end up in another few days.
regards, tom lane
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