Re: WIP: patch to create explicit support for semi and anti joins

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Simon Riggs" <simon(at)2ndquadrant(dot)com>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "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
Date: 2008-08-14 17:45:35
Message-ID: 48A428EF.EE98.0025.0@wicourts.gov
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>>> 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?

-Kevin

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