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 D44BD9DC809 for ; Thu, 26 Jan 2006 12:59:37 -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 53014-05 for ; Thu, 26 Jan 2006 12:59:36 -0400 (AST) X-Greylist: domain auto-whitelisted by SQLgrey- Received: from mail.gmx.net (mail.gmx.net [213.165.64.21]) by postgresql.org (Postfix) with SMTP id 02FBA9DC80E for ; Thu, 26 Jan 2006 12:59:33 -0400 (AST) Received: (qmail invoked by alias); 26 Jan 2006 16:59:32 -0000 Received: from dslb-084-063-027-189.pools.arcor-ip.net (EHLO colt.pezone.net) [84.63.27.189] by mail.gmx.net (mp029) with SMTP; 26 Jan 2006 17:59:32 +0100 X-Authenticated: #495269 From: Peter Eisentraut To: pgsql-sql@postgresql.org Subject: Re: filtering after join Date: Thu, 26 Jan 2006 17:59:30 +0100 User-Agent: KMail/1.8.3 Cc: andrew References: <29d3b0b90601250927o2a5ee6e6mc33a7647da4438ce@mail.gmail.com> <200601261222.34906.peter_e@gmx.net> <29d3b0b90601260454g35817213o7d5a0e8a1e53ddf7@mail.gmail.com> In-Reply-To: <29d3b0b90601260454g35817213o7d5a0e8a1e53ddf7@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200601261759.31184.peter_e@gmx.net> X-Y-GMX-Trusted: 0 X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.131 required=5 tests=[AWL=0.131] X-Spam-Score: 0.131 X-Spam-Level: X-Archive-Number: 200601/188 X-Sequence-Number: 23977 andrew wrote: > How will the query planner do for a nesting query? Treat the > subqueries as multiple queries and then link them together? > where can I find the information (codes or documents)? Look at the execution plan using the EXPLAIN command. -- Peter Eisentraut http://developer.postgresql.org/~petere/