X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 4E3A05E46DC for ; Wed, 18 Aug 2004 12:17:04 -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 15894-05 for ; Wed, 18 Aug 2004 15:17:08 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id 645BC5E46D5 for ; Wed, 18 Aug 2004 12:16:59 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.12.11/8.12.11) with ESMTP id i7IFGnZj022809; Wed, 18 Aug 2004 11:16:49 -0400 (EDT) To: Jan Wieck Cc: Markus Bertheau , Josh Berkus , olly@lfix.co.uk, pgsql-sql@postgresql.org, Bruce Momjian Subject: Re: multi column foreign key for implicitly unique columns In-reply-to: <41236277.5060903@Yahoo.com> References: <1092734724.2627.4.camel@dicaprio.akademie1.de> <1092735576.28365.48.camel@linda> <1092736197.2627.12.camel@dicaprio.akademie1.de> <200408171945.15663.josh@agliodbs.com> <41235A90.1080300@Yahoo.com> <1092836961.2630.3.camel@dicaprio.akademie1.de> <41236277.5060903@Yahoo.com> Comments: In-reply-to Jan Wieck message dated "Wed, 18 Aug 2004 10:06:47 -0400" Date: Wed, 18 Aug 2004 11:16:49 -0400 Message-ID: <22808.1092842209@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.0 tagged_above=0.0 required=5.0 tests= X-Spam-Level: X-Archive-Number: 200408/196 X-Sequence-Number: 18693 Jan Wieck writes: > However, Bruce, this should be on the TODO list: > * Allow foreign key to reference a superset of the columns > covered by a unique constraint on the referenced table. See the followup discussion as to why this is a bad idea. regards, tom lane