X-Original-To: pgsql-hackers-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id 7D52E9DCCBC; Thu, 16 Feb 2006 09:44:45 -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 98305-01; Thu, 16 Feb 2006 09:44:46 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- X-Greylist: from auto-whitelisted by SQLgrey- Received: from mail.logix-tt.com (serval.logix-tt.com [213.239.221.42]) by postgresql.org (Postfix) with ESMTP id 9A7449DC83D; Thu, 16 Feb 2006 09:44:40 -0400 (AST) Received: from kingfisher.intern.logix-tt.com (Me829.m.pppool.de [89.49.232.41]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.logix-tt.com (Postfix) with ESMTP id 3AEFB244080; Thu, 16 Feb 2006 14:44:49 +0100 (CET) Received: from [127.0.0.1] (localhost [127.0.0.1]) by kingfisher.intern.logix-tt.com (Postfix) with ESMTP id 6DEBE18189F93; Thu, 16 Feb 2006 14:44:46 +0100 (CET) Message-ID: <43F481CD.2010509@logix-tt.com> Date: Thu, 16 Feb 2006 14:44:45 +0100 From: Markus Schaber Organization: Logical Tracking and Tracing International AG, Switzerland User-Agent: Debian Thunderbird 1.0.7 (X11/20051017) X-Accept-Language: en-us, en MIME-Version: 1.0 To: pgsql-performance@postgresql.org, pgsql-hackers@postgresql.org Subject: Re: qsort again (was Re: [PERFORM] Strange Create Index References: <43F38867.6010701@gpdnet.co.uk> <19510.1140036968@sss.pgh.pa.us> <19779.1140038874@sss.pgh.pa.us> <43F39E53.1020009@gpdnet.co.uk> <20781.1140046109@sss.pgh.pa.us> <7.0.1.0.2.20060215194635.03b55da0@earthlink.net> <21615.1140052893@sss.pgh.pa.us> <7.0.1.0.2.20060215223710.03a7c618@earthlink.net> <20060216113522.GA3461@uio.no> <7.0.1.0.2.20060216071053.0385a1a8@earthlink.net> In-Reply-To: <7.0.1.0.2.20060216071053.0385a1a8@earthlink.net> X-Enigmail-Version: 0.93.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.121 required=5 tests=[AWL=0.121] X-Spam-Score: 0.121 X-Spam-Level: X-Archive-Number: 200602/622 X-Sequence-Number: 79760 Hi, Ron, Ron wrote: > ...and of course if you know enough about the data to be sorted so as to > constrain it appropriately, one should use a non comparison based O(N) > sorting algorithm rather than any of the general comparison based > O(NlgN) methods. Sounds interesting, could you give us some pointers (names, URLs, papers) to such algorithms? Thanks a lot, Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org