X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id CD42B9DC99E for ; Tue, 17 Jan 2006 19:12:18 -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 57932-03 for ; Tue, 17 Jan 2006 19:12:21 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from davinci.ethosmedia.com (server227.ethosmedia.com [209.128.84.227]) by postgresql.org (Postfix) with ESMTP id B4A8A9DC9AD for ; Tue, 17 Jan 2006 19:12:16 -0400 (AST) X-EthosMedia-Virus-Scanned: no infections found Received: from [64.81.245.111] (account josh@agliodbs.com HELO [192.168.1.27]) by davinci.ethosmedia.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 8836929; Tue, 17 Jan 2006 15:15:05 -0800 From: Josh Berkus Reply-To: josh@agliodbs.com Organization: Aglio Database Solutions To: pgsql-performance@postgresql.org Subject: Re: Suspending SELECTs Date: Tue, 17 Jan 2006 15:18:07 -0800 User-Agent: KMail/1.8 Cc: Alessandro Baretta , Tom Lane References: <43CB71AC.20203@barettadeit.com> <43CD4BD0.9090807@barettadeit.com> <200601171459.02398.josh@agliodbs.com> In-Reply-To: <200601171459.02398.josh@agliodbs.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200601171518.07342.josh@agliodbs.com> X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.076 required=5 tests=[AWL=0.076] X-Spam-Score: 0.076 X-Spam-Level: X-Archive-Number: 200601/277 X-Sequence-Number: 16755 People: To follow up further, what Alessandro is talking about is known as a "keyset cursor". Sybase and SQL Server used to support them; I beleive that they were strictly read-only and had weird issues with record visibility. -- --Josh Josh Berkus Aglio Database Solutions San Francisco