X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 0B33652809 for ; Tue, 24 May 2005 21:20:48 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 25272-10 for ; Wed, 25 May 2005 00:20:39 +0000 (GMT) Received: from vms042pub.verizon.net (vms042pub.verizon.net [206.46.252.42]) by svr1.postgresql.org (Postfix) with ESMTP id E5D3D5288A for ; Tue, 24 May 2005 21:20:37 -0300 (ADT) Received: from osgiliath.mathom.us ([70.108.87.79]) by vms042.mailsrvcs.net (Sun Java System Messaging Server 6.2 HotFix 0.04 (built Dec 24 2004)) with ESMTPA id <0IH000HYJRMG6FH5@vms042.mailsrvcs.net> for pgsql-performance@postgresql.org; Tue, 24 May 2005 19:20:40 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by osgiliath.mathom.us (Postfix) with ESMTP id E053261407F for ; Tue, 24 May 2005 20:20:39 -0400 (EDT) Received: from osgiliath.mathom.us ([127.0.0.1]) by localhost (osgiliath [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 17656-03 for ; Tue, 24 May 2005 20:20:39 -0400 (EDT) Received: by osgiliath.mathom.us (Postfix, from userid 1000) id B97CD60043F; Tue, 24 May 2005 20:20:39 -0400 (EDT) Date: Tue, 24 May 2005 20:20:39 -0400 From: Michael Stone Subject: Re: Select performance vs. mssql In-reply-to: <200505241635.14558.josh@agliodbs.com> To: pgsql-performance@postgresql.org Mail-Followup-To: pgsql-performance@postgresql.org Message-id: <20050525002039.GA27519@mathom.us> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii; format=flowed Content-disposition: inline X-Pgp-Fingerprint: 53 FF 38 00 E7 DD 0A 9C 84 52 84 C5 EE DF 7C 88 X-Virus-Scanned: by amavisd-new-20030616-p10 (Debian) at mathom.us References: <20050524191328.58243.qmail@web53110.mail.yahoo.com> <200505241635.14558.josh@agliodbs.com> User-Agent: Mutt/1.5.9i X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.05 tagged_above=0 required=5 tests=FORGED_RCVD_HELO X-Spam-Level: X-Archive-Number: 200505/374 X-Sequence-Number: 12538 On Tue, May 24, 2005 at 04:35:14PM -0700, Josh Berkus wrote: >Pretty much. There has been discussion about allowing index-only access to >"frozen" tables, i.e. archive partitions. But it all sort of hinges on >someone implementing it and testing .... Is there any way to expose the planner estimate? For some purposes it's enough to just give a rough ballpark (e.g., a google-esque "results 1-10 of approximately 10000000") so a user knows whether its worth even starting to page through. Mike Stone