Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id EF903B5DBEA for ; Wed, 31 Aug 2011 02:12:14 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 29907-06 for ; Wed, 31 Aug 2011 05:12:08 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mail.catalyst.net.nz (bertrand.catalyst.net.nz [202.78.240.40]) by mail.postgresql.org (Postfix) with ESMTP id 11267B5DBE9 for ; Wed, 31 Aug 2011 02:12:07 -0300 (ADT) Received: from localhost (localhost [127.0.0.1]) by mail.catalyst.net.nz (Postfix) with ESMTP id DB586325DF for ; Wed, 31 Aug 2011 17:12:03 +1200 (NZST) X-Virus-Scanned: Debian amavisd-new at catalyst.net.nz Received: from mail.catalyst.net.nz ([127.0.0.1]) by localhost (bertrand.catalyst.net.nz [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nBdMQKxtCGLQ for ; Wed, 31 Aug 2011 17:12:03 +1200 (NZST) Received: from [IPv6:2404:130:0:1000:222:15ff:fe5c:2471] (unknown [IPv6:2404:130:0:1000:222:15ff:fe5c:2471]) (Authenticated sender: mark.kirkwood) by mail.catalyst.net.nz (Postfix) with ESMTPSA id 3A244325D5 for ; Wed, 31 Aug 2011 17:12:03 +1200 (NZST) Message-ID: <4E5DC29C.1000700@catalyst.net.nz> Date: Wed, 31 Aug 2011 17:11:56 +1200 From: Mark Kirkwood User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.20) Gecko/20110805 Lightning/1.0b2 Thunderbird/3.1.12 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: 8.4 optimization regression? References: <4E5331FF.3000900@catalyst.net.nz> <15708.1314155740@sss.pgh.pa.us> <4E548A7D.6090003@catalyst.net.nz> <4E5C14FF.8060909@catalyst.net.nz> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.404 tagged_above=-10 required=5 tests=BAYES_00=-1.9, RP_MATCHES_RCVD=-0.504 X-Spam-Level: X-Archive-Number: 201108/307 X-Sequence-Number: 44754 On 30/08/11 21:43, Grzegorz Jaƛkiewicz wrote: > 2011/8/29 Mark Kirkwood: > >> I note from the commit message that the fix test case was from Grzegorz >> Jaskiewicz (antijoin against a small subset of a relation). I was not able >> to find this in the archives - Grzegorz do you recall the actual test case? >> I thought it might be useful for me to spend some time studying both cases >> and seeing if I can come up with any tweaks that would let both your and my >> queries work well! > Sorry, I don't remember that particular example. If I complained about > it, it would have been on this list or the general list. > I'll have a look by date. > Thanks - however I think I have managed to make up a good test case that shows the particular commit working. More on that to come! Cheers Mark