From issues-return-187498-archive-asf-public=cust-asf.ponee.io@spark.apache.org Tue Mar 20 20:26:08 2018 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id DCA7418067E for ; Tue, 20 Mar 2018 20:26:07 +0100 (CET) Received: (qmail 44462 invoked by uid 500); 20 Mar 2018 19:26:02 -0000 Mailing-List: contact issues-help@spark.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@spark.apache.org Received: (qmail 44453 invoked by uid 99); 20 Mar 2018 19:26:01 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 20 Mar 2018 19:26:01 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id 93F6B18000B for ; Tue, 20 Mar 2018 19:26:01 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.311 X-Spam-Level: X-Spam-Status: No, score=-110.311 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id rfm-uj0GwXOs for ; Tue, 20 Mar 2018 19:26:01 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id C3C1F5F4EB for ; Tue, 20 Mar 2018 19:26:00 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 544F1E023B for ; Tue, 20 Mar 2018 19:26:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 04652214B9 for ; Tue, 20 Mar 2018 19:26:00 +0000 (UTC) Date: Tue, 20 Mar 2018 19:26:00 +0000 (UTC) From: "Ioana Delaney (JIRA)" To: issues@spark.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Created] (SPARK-23756) [Performance] Redundant join elimination MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 Ioana Delaney created SPARK-23756: ------------------------------------- Summary: [Performance] Redundant join elimination Key: SPARK-23756 URL: https://issues.apache.org/jira/browse/SPARK-23756 Project: Spark Issue Type: Sub-task Components: SQL Affects Versions: 3.0.0 Reporter: Ioana Delaney This rewrite eliminates self-joins on unique keys. Self-joins may be introduced after view expansion. *User view:* {code} create view manager(mgrno, income) as select e.empno, e.salary + e.bonus from employee e, department d where e.empno = d.mgrno; {code} *User query:* {code} select e.empname, e.empno from employee e, manager m where e.empno = m.mgrno and m.income > 100K {code} *Internal query after view expansion:* {code} select e.lastname, e.empno from employee e, employee m, department d where e.empno = m.empno /* PK = PK */ and e.empno = d.mgrno and m.salary + m.bonus > 100K {code} *Internal query after join elimination:* {code} select e.lastname, e.empno from employee e, department d where e.empno = d.mgrno and e.salary + e.bonus > 100K {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org For additional commands, e-mail: issues-help@spark.apache.org