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

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
Date: 2008-08-14 19:04:35
Message-ID: 1463.1218740675@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

"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

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Jan UrbaƄski 2008-08-14 19:45:18 Re: gsoc, oprrest function for text search take 2
Previous Message Tom Lane 2008-08-14 18:15:22 Re: autovacuum and TOAST tables