X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id 2C40A9DCA82 for ; Thu, 19 Jan 2006 11:58:10 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 43733-03-3 for ; Thu, 19 Jan 2006 11:58:14 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from mail.metronet.co.uk (mail.metronet.co.uk [213.162.97.75]) by postgresql.org (Postfix) with ESMTP id C08AD9DCA89 for ; Thu, 19 Jan 2006 11:58:07 -0400 (AST) Received: from mainbox.archonet.com (84-51-143-99.archon037.adsl.metronet.co.uk [84.51.143.99]) by smtp.metronet.co.uk (MetroNet Mail) with ESMTP id 67E1A4378F2; Thu, 19 Jan 2006 15:52:35 +0000 (GMT) Received: from [192.168.1.17] (client17.office.archonet.com [192.168.1.17]) by mainbox.archonet.com (Postfix) with ESMTP id 678BD15EE9; Thu, 19 Jan 2006 15:52:46 +0000 (GMT) Message-ID: <43CFB5CD.9070704@archonet.com> Date: Thu, 19 Jan 2006 15:52:45 +0000 From: Richard Huxton User-Agent: Thunderbird 1.5 (X11/20051201) MIME-Version: 1.0 To: mailreg@numerixtechnology.de Cc: pgsql-sql Subject: Re: indexing for left join References: <43CFB325.9060306@numerixtechnology.de> In-Reply-To: <43CFB325.9060306@numerixtechnology.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.07 required=5 tests=[AWL=0.070] X-Spam-Score: 0.07 X-Spam-Level: X-Archive-Number: 200601/132 X-Sequence-Number: 23921 T E Schmitz wrote: > > Sequential despite the indices? Or is this because the tables of my test > DB are virtually empty? Yes - read up on analyse and column statistics for details. Oh, you've probably missed about vacuuming too. -- Richard Huxton Archonet Ltd