Return-Path: Delivered-To: 2-oracle-l@orafaq.com Received: (qmail 10822 invoked from network); 9 Sep 2008 16:07:26 -0500 Received: from freelists-180.iquest.net (HELO turing.freelists.org) (206.53.239.180) by air964.startdedicated.com with SMTP; 9 Sep 2008 16:07:25 -0500 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 0F9DB94B1B2; Tue, 9 Sep 2008 17:07:25 -0400 (EDT) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing.freelists.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 17063-07; Tue, 9 Sep 2008 17:07:24 -0400 (EDT) Received: from turing.freelists.org (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 4AC7F94B1B7; Tue, 9 Sep 2008 17:07:24 -0400 (EDT) Received: with ECARTIS (v1.0.0; list oracle-l); Tue, 09 Sep 2008 17:05:25 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id A990A94AB39 for ; Tue, 9 Sep 2008 17:05:25 -0400 (EDT) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing.freelists.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 16183-01 for ; Tue, 9 Sep 2008 17:05:25 -0400 (EDT) Received: from smtp2a.orange.fr (smtp2a.orange.fr [80.12.242.138]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 67BC994A8D9 for ; Tue, 9 Sep 2008 17:05:25 -0400 (EDT) Received: from smtp20.orange.fr (mwinf2015 [172.22.130.43]) by mwinf2a05.orange.fr (SMTP Server) with ESMTP id 60EAC1CA6146 for ; Tue, 9 Sep 2008 22:10:23 +0200 (CEST) Received: from smtp20.orange.fr (mwinf2027 [172.22.130.127]) by mwinf2015.orange.fr (SMTP Server) with ESMTP id AF0401C9F343 for ; Tue, 9 Sep 2008 17:25:32 +0200 (CEST) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf2027.orange.fr (SMTP Server) with ESMTP id 6E0401C0021D; Tue, 9 Sep 2008 17:23:24 +0200 (CEST) Received: from [192.168.254.50] (AVelizy-751-1-5-110.w86-217.abo.wanadoo.fr [86.217.112.110]) by mwinf2027.orange.fr (SMTP Server) with ESMTP id 4273A1C0014D; Tue, 9 Sep 2008 17:23:24 +0200 (CEST) X-ME-UUID: 20080909152324272.4273A1C0014D@mwinf2027.orange.fr Message-ID: <48C69508.1020201@roughsea.com> Date: Tue, 09 Sep 2008 17:23:52 +0200 From: Stephane Faroult User-Agent: Thunderbird 2.0.0.0 (X11/20070326) MIME-Version: 1.0 To: cjnewman@uillinois.edu Cc: oracle-l@freelists.org Subject: Re: Using hints- most commonly used? References: <565F609E6D736D439837F1A1A797F34101A60110@ADMINMAIL1.ui.uillinois.edu> In-Reply-To: <565F609E6D736D439837F1A1A797F34101A60110@ADMINMAIL1.ui.uillinois.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-archive-position: 10701 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-to: oracle-l-bounce@freelists.org X-original-sender: sfaroult@roughsea.com Precedence: normal Reply-to: sfaroult@roughsea.com List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: oracle-l X-List-ID: oracle-l List-subscribe: List-owner: List-post: List-archive: X-list: oracle-l X-Virus-Scanned: Debian amavisd-new at localhost.localdomain Chris, This is probably the most useful links about hints: http://jonathanlewis.wordpress.com/2008/05/02/rules-for-hinting/. This is a position I share. I used to think that a few hints were harmless, but I'm no longer so sure. A few weeks ago, I met an interesting query in which the hint was contributing to get the proper result (by forcing an index descent). In other words: remove the hint, you get a wrong result. Isn't it nice? /*+ Hope_that_helps */ SF Newman, Christopher wrote: > Does anyone have a link for information on using hints? Specifically, > I'm writing a tuning guide and looking for a minimalist guide of the > most commonly used hints and their usage. > -- http://www.freelists.org/webpage/oracle-l