Received: from makus.postgresql.org (makus.postgresql.org [98.129.198.125]) by mail.postgresql.org (Postfix) with ESMTP id 9EB4510E9003 for ; Sun, 8 Jan 2012 14:10:17 -0400 (AST) Received: from 7.mo1.mail-out.ovh.net ([87.98.158.110] helo=mo1.mail-out.ovh.net) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1RjxCC-0003QH-4H for pgsql-performance@postgresql.org; Sun, 08 Jan 2012 18:10:16 +0000 Received: from mail99.ha.ovh.net (b6.ovh.net [213.186.33.56]) by mo1.mail-out.ovh.net (Postfix) with SMTP id 454C8FF8160 for ; Sun, 8 Jan 2012 19:11:10 +0100 (CET) Received: from b0.ovh.net (HELO queueout) (213.186.33.50) by b0.ovh.net with SMTP; 8 Jan 2012 20:10:01 +0200 Received: from civ69-1-88-168-96-119.fbx.proxad.net (HELO apollo13) (lists%peufeu.com@88.168.96.119) by ns0.ovh.net with SMTP; 8 Jan 2012 20:09:59 +0200 Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes To: "Marc Eberhard" Cc: pgsql-performance@postgresql.org X-Ovh-Mailout: 178.32.228.1 (mo1.mail-out.ovh.net) Subject: Re: Duplicate deletion optimizations References: <3da8ce0cdf1da4ef873841d01ed0e70a@inaps.org> Date: Sun, 08 Jan 2012 19:09:57 +0100 MIME-Version: 1.0 From: "Pierre C" Message-ID: In-Reply-To: User-Agent: Opera Mail/11.52 (Linux) X-Ovh-Tracer-Id: 15849855939311502905 X-Ovh-Remote: 88.168.96.119 (civ69-1-88-168-96-119.fbx.proxad.net) X-Ovh-Local: 213.186.33.20 (ns0.ovh.net) X-OVH-SPAMSTATE: OK X-OVH-SPAMSCORE: -100 X-OVH-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeefkedrfeegucetggdotefuucfrrhhofhhilhgvmecuqfggjfenuceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurheptgfvufhfffgggffhkfgjfgesthekredttderjeenucfhrhhomhepfdfrihgvrhhrvgcuvedfuceolhhishhtshesphgvuhhfvghurdgtohhmqeenucffohhmrghinhepne X-Spam-Check: DONE|U 0.5/N X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeefkedrfeegucetggdotefuucfrrhhofhhilhgvmecuqfggjfenuceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurheptgfvufhfffgggffhkfgjfgesthekredttderjeenucfhrhhomhepfdfrihgvrhhrvgcuvedfuceolhhishhtshesphgvuhhfvghurdgtohhmqeenucffohhmrghinhepne Content-Transfer-Encoding: quoted-printable X-Pg-Spam-Score: -1.9 (-) X-Archive-Number: 201201/24 X-Sequence-Number: 46037 > That's almost identical to my tables. You explained your problem very well ;) > I certainly will. Many thanks for those great lines of SQL! You're welcome ! Strangely I didn't receive the mail I posted to the list (received yours = =20 though).