Received: from maia.hub.org (maia-3.hub.org [200.46.204.243]) by mail.postgresql.org (Postfix) with ESMTP id B0F991337B63 for ; Tue, 30 Nov 2010 18:55:12 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.243]) (amavisd-maia, port 10024) with ESMTP id 95213-01 for ; Tue, 30 Nov 2010 22:55:05 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from gw.wicourts.gov (gwmta.wicourts.gov [165.219.244.99]) by mail.postgresql.org (Postfix) with ESMTP id 627831335B36 for ; Tue, 30 Nov 2010 18:55:04 -0400 (AST) Received: from Courts-MTA by gw.wicourts.gov with Novell_GroupWise; Tue, 30 Nov 2010 16:54:57 -0600 Message-Id: <4CF52C5F0200002500037FBA@gw.wicourts.gov> X-Mailer: Novell GroupWise Internet Agent 8.0.1 Date: Tue, 30 Nov 2010 16:54:55 -0600 From: "Kevin Grittner" To: "T.H." , Subject: Re: Question about subselect/IN performance References: In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-4.21 tagged_above=-10 required=5 tests=BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01 X-Spam-Level: X-Archive-Number: 201011/417 X-Sequence-Number: 41441 "T.H." wrote: > Also, are there any better ways you can think of doing such an IN > query, using non-subselect means that might be more efficient? Have you tried the EXISTS predicate? -Kevin