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 578B59DCD22 for ; Fri, 24 Mar 2006 15:23:57 -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 20857-03 for ; Fri, 24 Mar 2006 15:23:57 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 001A99DCB83 for ; Fri, 24 Mar 2006 15:23:53 -0400 (AST) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id k2OJNnrD008428; Fri, 24 Mar 2006 14:23:49 -0500 (EST) To: Svenne Krap cc: "Jim C. Nasby" , pgsql-performance@postgresql.org Subject: Re: Performance problems with multiple layers of functions In-reply-to: <4424458D.4060106@krap.dk> References: <4423EACD.80706@krap.dk> <20060324125919.GD90527@pervasive.com> <5090.1143216154@sss.pgh.pa.us> <4424458D.4060106@krap.dk> Comments: In-reply-to Svenne Krap message dated "Fri, 24 Mar 2006 20:16:29 +0100" Date: Fri, 24 Mar 2006 14:23:49 -0500 Message-ID: <8427.1143228229@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.114 required=5 tests=[AWL=0.114] X-Spam-Score: 0.114 X-Spam-Level: X-Archive-Number: 200603/510 X-Sequence-Number: 17947 Svenne Krap writes: > Tom Lane wrote: >> where (flow_direction, dataset_id) in (select * from new_func(122)) > Is this form of multi-column IN mentioned anywhere in the docs? I can't > find it. Sure, look under "Subquery Expressions". 8.0 and later refer to it as a row_constructor, but it's documented at least as far back as 7.3. regards, tom lane