Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 9D30B200CAC for ; Mon, 19 Jun 2017 22:14:04 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 9BFF1160BE1; Mon, 19 Jun 2017 20:14:04 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id E2DD5160BCD for ; Mon, 19 Jun 2017 22:14:03 +0200 (CEST) Received: (qmail 51515 invoked by uid 500); 19 Jun 2017 20:14:03 -0000 Mailing-List: contact issues-help@hive.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@hive.apache.org Delivered-To: mailing list issues@hive.apache.org Received: (qmail 51506 invoked by uid 99); 19 Jun 2017 20:14:03 -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; Mon, 19 Jun 2017 20:14:03 +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 C4B0A1813A9 for ; Mon, 19 Jun 2017 20:14:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -99.202 X-Spam-Level: X-Spam-Status: No, score=-99.202 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id gR2ou_nKVl4w for ; Mon, 19 Jun 2017 20:14:02 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id 64ADE5F6C6 for ; Mon, 19 Jun 2017 20:14:01 +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 A7D1BE0BE0 for ; Mon, 19 Jun 2017 20:14:00 +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 0EDBD24001 for ; Mon, 19 Jun 2017 20:14:00 +0000 (UTC) Date: Mon, 19 Jun 2017 20:14:00 +0000 (UTC) From: "Ashutosh Chauhan (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HIVE-16797) Enhance HiveFilterSetOpTransposeRule to remove union branches MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Mon, 19 Jun 2017 20:14:04 -0000 [ https://issues.apache.org/jira/browse/HIVE-16797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16054668#comment-16054668 ] Ashutosh Chauhan commented on HIVE-16797: ----------------------------------------- +1 > Enhance HiveFilterSetOpTransposeRule to remove union branches > ------------------------------------------------------------- > > Key: HIVE-16797 > URL: https://issues.apache.org/jira/browse/HIVE-16797 > Project: Hive > Issue Type: Sub-task > Reporter: Pengcheng Xiong > Assignee: Pengcheng Xiong > Attachments: HIVE-16797.01.patch, HIVE-16797.02.patch, HIVE-16797.03.patch, HIVE-16797.04.patch, HIVE-16797.05.patch > > > in query4.q, we can see that it creates a CTE with union all of 3 branches. Then it is going to do a 3 way self-join of the CTE with predicates. The predicates actually specifies only one of the branch in CTE to participate in the join. Thus, in some cases, e.g., > {code} > /- filter(false) -----TS0 > union all - filter(false) -----TS1 > \-----TS2 > {code} > we can cut the branches of TS0 and TS1. The union becomes only TS2. -- This message was sent by Atlassian JIRA (v6.4.14#64029)