From issues-return-130721-archive-asf-public=cust-asf.ponee.io@hive.apache.org Sun Jul 29 22:16:05 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 CF9C918065B for ; Sun, 29 Jul 2018 22:16:04 +0200 (CEST) Received: (qmail 72421 invoked by uid 500); 29 Jul 2018 20:16:03 -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 72412 invoked by uid 99); 29 Jul 2018 20:16:03 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd2-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 29 Jul 2018 20:16:03 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd2-us-west.apache.org (ASF Mail Server at spamd2-us-west.apache.org) with ESMTP id 87D341A0262 for ; Sun, 29 Jul 2018 20:16:03 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd2-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.301 X-Spam-Level: X-Spam-Status: No, score=-110.301 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd2-us-west.apache.org [10.40.0.9]) (amavisd-new, port 10024) with ESMTP id ARDxz8Gx6HaE for ; Sun, 29 Jul 2018 20:16:02 +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 AE54E5F52D for ; Sun, 29 Jul 2018 20:16:01 +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 C7DC8E25D6 for ; Sun, 29 Jul 2018 20:16:00 +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 2880327760 for ; Sun, 29 Jul 2018 20:16:00 +0000 (UTC) Date: Sun, 29 Jul 2018 20:16:00 +0000 (UTC) From: "George Pachitariu (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-20262) Implement stats annotation rule for the UDTFOperator MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HIVE-20262?page=3Dcom.atlassia= n.jira.plugin.system.issuetabpanels:all-tabpanel ] George Pachitariu updated HIVE-20262: ------------------------------------- Attachment: HIVE-20262.2.patch Status: Patch Available (was: Open) > Implement stats annotation rule for the UDTFOperator > ---------------------------------------------------- > > Key: HIVE-20262 > URL: https://issues.apache.org/jira/browse/HIVE-20262 > Project: Hive > Issue Type: Improvement > Components: Physical Optimizer > Reporter: George Pachitariu > Assignee: George Pachitariu > Priority: Minor > Attachments: HIVE-20262.1.patch, HIVE-20262.2.patch, HIVE-20262.p= atch > > > User Defined Table Functions (UDTFs) change the number of rows of the out= put. A common UDTF is the explode() method that creates=C2=A0a row for each= element for each array in the input column. > =C2=A0 > Right now, the number of output rows is equal to the number of input rows= . But if the average number of output rows is bigger than 1, the resulting = number of rows is underestimated in the=C2=A0execution plan. > =C2=A0 > Implement a=C2=A0rule=C2=A0that can have a factor X as a parameter=C2=A0a= nd for each UDTF function predict that: > =C2=A0 > {code:java} > number of output rows =3D X * number of input rows{code} > =C2=A0 > =C2=A0 > =C2=A0 -- This message was sent by Atlassian JIRA (v7.6.3#76005)