Return-Path: Delivered-To: apmail-hadoop-hive-dev-archive@minotaur.apache.org Received: (qmail 78409 invoked from network); 26 Jun 2009 23:26:03 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 26 Jun 2009 23:26:03 -0000 Received: (qmail 44085 invoked by uid 500); 26 Jun 2009 23:26:13 -0000 Delivered-To: apmail-hadoop-hive-dev-archive@hadoop.apache.org Received: (qmail 44017 invoked by uid 500); 26 Jun 2009 23:26:13 -0000 Mailing-List: contact hive-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hive-dev@hadoop.apache.org Delivered-To: mailing list hive-dev@hadoop.apache.org Received: (qmail 44007 invoked by uid 99); 26 Jun 2009 23:26:13 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 26 Jun 2009 23:26:13 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 26 Jun 2009 23:26:08 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 2F714234C004 for ; Fri, 26 Jun 2009 16:25:47 -0700 (PDT) Message-ID: <810941175.1246058747180.JavaMail.jira@brutus> Date: Fri, 26 Jun 2009 16:25:47 -0700 (PDT) From: "Namit Jain (JIRA)" To: hive-dev@hadoop.apache.org Subject: [jira] Updated: (HIVE-530) Map Join followup: optimize number of map-reduce jobs In-Reply-To: <865405051.1243920247615.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HIVE-530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Namit Jain updated HIVE-530: ---------------------------- Attachment: hive.530.1.patch optimized the scenario when the mapjoin is not followed by a reducer > Map Join followup: optimize number of map-reduce jobs > ----------------------------------------------------- > > Key: HIVE-530 > URL: https://issues.apache.org/jira/browse/HIVE-530 > Project: Hadoop Hive > Issue Type: Bug > Components: Query Processor > Affects Versions: 0.4.0 > Reporter: Namit Jain > Assignee: Namit Jain > Attachments: hive.530.1.patch > > > Instead of creating a temporary destination after every mapJoin, avoid where-ever possible. > Also, replace the Select after MapJoin with a ForwardOperator -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.