From issues-return-118540-archive-asf-public=cust-asf.ponee.io@hive.apache.org Wed May 16 20:39:07 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 48BFC18077A for ; Wed, 16 May 2018 20:39:07 +0200 (CEST) Received: (qmail 42564 invoked by uid 500); 16 May 2018 18:39:06 -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 42555 invoked by uid 99); 16 May 2018 18:39:06 -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; Wed, 16 May 2018 18:39:06 +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 E03211A3DFC for ; Wed, 16 May 2018 18:39:05 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd2-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -101.511 X-Spam-Level: X-Spam-Status: No, score=-101.511 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd2-us-west.apache.org [10.40.0.9]) (amavisd-new, port 10024) with ESMTP id aSdili4821O1 for ; Wed, 16 May 2018 18:39:05 +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 ED9D75F5F7 for ; Wed, 16 May 2018 18:39:04 +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 1191AE0C2F for ; Wed, 16 May 2018 18:39:01 +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 79CE4217A6 for ; Wed, 16 May 2018 18:39:00 +0000 (UTC) Date: Wed, 16 May 2018 18:39:00 +0000 (UTC) From: "Prasanth Jayachandran (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-18079) Statistics: Allow HyperLogLog to be merged to the lowest-common-denominator bit-size 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-18079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Prasanth Jayachandran updated HIVE-18079: ----------------------------------------- Attachment: HIVE-18079.15.patch > Statistics: Allow HyperLogLog to be merged to the lowest-common-denominator bit-size > ------------------------------------------------------------------------------------ > > Key: HIVE-18079 > URL: https://issues.apache.org/jira/browse/HIVE-18079 > Project: Hive > Issue Type: Improvement > Components: Standalone Metastore, Statistics > Affects Versions: 3.0.0 > Reporter: Gopal V > Assignee: Prasanth Jayachandran > Priority: Major > Attachments: HIVE-18079.1.patch, HIVE-18079.10.patch, HIVE-18079.11.patch, HIVE-18079.12.patch, HIVE-18079.13.patch, HIVE-18079.14.patch, HIVE-18079.15.patch, HIVE-18079.2.patch, HIVE-18079.4.patch, HIVE-18079.5.patch, HIVE-18079.6.patch, HIVE-18079.7.patch, HIVE-18079.8.patch, HIVE-18079.9.patch > > > HyperLogLog can merge a 14 bit HLL into a 10 bit HLL bitset, because of its mathematical hash distribution & construction. > Allow the squashing of a 14 bit HLL -> 10 bit HLL without needing a second scan over the data-set. -- This message was sent by Atlassian JIRA (v7.6.3#76005)