Return-Path: Delivered-To: apmail-hadoop-hbase-user-archive@locus.apache.org Received: (qmail 57182 invoked from network); 30 Apr 2008 12:03:06 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 30 Apr 2008 12:03:06 -0000 Received: (qmail 62086 invoked by uid 500); 30 Apr 2008 12:03:07 -0000 Delivered-To: apmail-hadoop-hbase-user-archive@hadoop.apache.org Received: (qmail 62063 invoked by uid 500); 30 Apr 2008 12:03:07 -0000 Mailing-List: contact hbase-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hbase-user@hadoop.apache.org Delivered-To: mailing list hbase-user@hadoop.apache.org Received: (qmail 62052 invoked by uid 99); 30 Apr 2008 12:03:07 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 30 Apr 2008 05:03:07 -0700 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [166.111.8.81] (HELO smtp.tsinghua.edu.cn) (166.111.8.81) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 30 Apr 2008 12:02:21 +0000 Received: from [166.111.68.103] (helo=[127.0.0.1]) by smtp.tsinghua.edu.cn with esmtpa (Exim 4.63) (envelope-from ) id 1JrB10-0001qF-Ct for hbase-user@hadoop.apache.org; Wed, 30 Apr 2008 20:02:26 +0800 Message-ID: <48185FC9.6070104@mails.tsinghua.edu.cn> Date: Wed, 30 Apr 2008 20:02:17 +0800 From: Zhou Wei User-Agent: Thunderbird 2.0.0.12 (Windows/20080213) MIME-Version: 1.0 To: hbase-user@hadoop.apache.org Subject: Re: obtain the maximum value of the row id of a table References: <48168DA8.7060406@mails.tsinghua.edu.cn> <57455915-419A-4BCA-B6E8-47C95CA1F150@rapleaf.com> <48173A07.9090805@mails.tsinghua.edu.cn> <5FD2284D-1B04-48AD-A525-470E5CCA32AC@rapleaf.com> <48174667.7030504@mails.tsinghua.edu.cn> <84E2AE771361E9419DD0EFBD31F09C4D4F5BC0106B@EXVMBX015-1.exch015.msoutlookonline.net> In-Reply-To: <84E2AE771361E9419DD0EFBD31F09C4D4F5BC0106B@EXVMBX015-1.exch015.msoutlookonline.net> Content-Type: text/plain; charset=windows-1250; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Jim Kellerman wrote: > What are you using for the row key? > The row key is set by the primary key of the "original table" defined in relational model. Sometimes, multiple relational tables are required to be joined into one "bigtable" In this case, I use the primary key of relational table "Order" as the row key. > --- > Jim Kellerman, Senior Engineer; Powerset > > > >> -----Original Message----- >> From: Zhou Wei [mailto:zhouwei04@mails.tsinghua.edu.cn] >> Sent: Tuesday, April 29, 2008 9:02 AM >> To: hbase-user@hadoop.apache.org >> Subject: Re: obtain the maximum value of the row id of a table >> >> Bryan Duxbury wrote: >> >>> No, we can't scan in reverse. I don't think it's possible to do so >>> with the components we have today - there's no previous method on >>> mapfile, only next. Out of curiosity, hat's the use case >>>