Received: from maia.hub.org (unknown [200.46.204.183])
	by mail.postgresql.org (Postfix) with ESMTP id B19556329AA
	for <pgsql-sql-postgresql.org@mail.postgresql.org>;
	Thu, 10 Dec 2009 14:09:28 -0400 (AST)
Received: from mail.postgresql.org ([200.46.204.86])
	by maia.hub.org (mx1.hub.org [200.46.204.183]) (amavisd-maia,
	port 10024) with ESMTP id 07229-03 for
	<pgsql-sql-postgresql.org@mail.postgresql.org>;
	Thu, 10 Dec 2009 18:09:21 +0000 (UTC)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.6
Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130])
	by mail.postgresql.org (Postfix) with ESMTP id 330F5632419
	for <pgsql-sql@postgresql.org>; Thu, 10 Dec 2009 14:09:21 -0400 (AST)
Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1])
	by sss.pgh.pa.us (8.14.2/8.14.2) with ESMTP id nBAI9JUp025984;
	Thu, 10 Dec 2009 13:09:19 -0500 (EST)
To: Harald Fuchs <hari.fuchs@gmail.com>
cc: pgsql-sql@postgresql.org
Subject: Re: Window function trouble 
In-reply-to: <pu7hsuafcq.fsf@srv.protecting.net> 
References: <pud42mahnr.fsf@srv.protecting.net>
	<pu7hsuafcq.fsf@srv.protecting.net>
Comments: In-reply-to Harald Fuchs <hari.fuchs@gmail.com>
	message dated "Thu, 10 Dec 2009 18:49:57 +0100"
Date: Thu, 10 Dec 2009 13:09:19 -0500
Message-ID: <25983.1260468559@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
X-Virus-Scanned: Maia Mailguard 1.0.1
X-Spam-Status: No, hits=-2.599 tagged_above=-10 required=5
	tests=BAYES_00=-2.599
X-Spam-Level: 
X-Archive-Number: 200912/29
X-Sequence-Number: 33467

Harald Fuchs <hari.fuchs@gmail.com> writes:
> Apparently the CASE expression is named "adr" unless named
> otherwise, and the result set is sorted by this expression instead of
> the column named "adr".  Does anyone know what the SQL standard says
> about that?

The SQL standard says the default name for any output column other
than a simple column reference is implementation-dependent.  I think
our implementation involves looking at the default value for a CASE.

			regards, tom lane