Return-Path: X-Original-To: apmail-hive-issues-archive@minotaur.apache.org Delivered-To: apmail-hive-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 3DEF318C89 for ; Wed, 9 Mar 2016 03:16:41 +0000 (UTC) Received: (qmail 70927 invoked by uid 500); 9 Mar 2016 03:16:41 -0000 Delivered-To: apmail-hive-issues-archive@hive.apache.org Received: (qmail 70904 invoked by uid 500); 9 Mar 2016 03:16:41 -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 70892 invoked by uid 99); 9 Mar 2016 03:16:41 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Mar 2016 03:16:41 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id B63722C1F5C for ; Wed, 9 Mar 2016 03:16:40 +0000 (UTC) Date: Wed, 9 Mar 2016 03:16:40 +0000 (UTC) From: "Ashutosh Chauhan (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HIVE-13233) Use min and max values to estimate better stats for comparison operators MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HIVE-13233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15186414#comment-15186414 ] Ashutosh Chauhan commented on HIVE-13233: ----------------------------------------- This is only taking into account >= , > What about other arithmetic expressions like <= , < . Also, we need recursive implementation for nested expressions. > Use min and max values to estimate better stats for comparison operators > ------------------------------------------------------------------------ > > Key: HIVE-13233 > URL: https://issues.apache.org/jira/browse/HIVE-13233 > Project: Hive > Issue Type: Bug > Components: Statistics > Affects Versions: 2.1.0 > Reporter: Jesus Camacho Rodriguez > Assignee: Jesus Camacho Rodriguez > Attachments: HIVE-13233.patch > > > We should benefit from the min/max values for each column to calculate more precisely the number of rows produced by expressions with comparison operators -- This message was sent by Atlassian JIRA (v6.3.4#6332)