From issues-return-151891-archive-asf-public=cust-asf.ponee.io@hive.apache.org Thu Mar 7 01:04:04 2019 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 1ABCE180656 for ; Thu, 7 Mar 2019 02:04:03 +0100 (CET) Received: (qmail 19824 invoked by uid 500); 7 Mar 2019 01:04:03 -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 19809 invoked by uid 99); 7 Mar 2019 01:04:03 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 07 Mar 2019 01:04:03 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id A49C2C0467 for ; Thu, 7 Mar 2019 01:04:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-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-us.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id 60BLPwNYb-ns for ; Thu, 7 Mar 2019 01:04:01 +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 3089C5F358 for ; Thu, 7 Mar 2019 01:04:01 +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 7C5DFE27D5 for ; Thu, 7 Mar 2019 01:04:00 +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 346CF25768 for ; Thu, 7 Mar 2019 01:04:00 +0000 (UTC) Date: Thu, 7 Mar 2019 01:04:00 +0000 (UTC) From: "Vineet Garg (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-21338) Remove order by and limit for aggregates 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-21338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vineet Garg updated HIVE-21338: ------------------------------- Attachment: HIVE-21338.5.patch > Remove order by and limit for aggregates > ---------------------------------------- > > Key: HIVE-21338 > URL: https://issues.apache.org/jira/browse/HIVE-21338 > Project: Hive > Issue Type: Improvement > Components: Query Planning > Reporter: Vineet Garg > Assignee: Vineet Garg > Priority: Major > Labels: pull-request-available > Attachments: HIVE-21338.1.patch, HIVE-21338.2.patch, HIVE-21338.3.patch, HIVE-21338.4.patch, HIVE-21338.5.patch > > Time Spent: 1h 20m > Remaining Estimate: 0h > > If a query is guaranteed to produce at most one row LIMIT and ORDER BY could be removed. This saves unnecessary vertex for LIMIT/ORDER BY. > {code:sql} > explain select count(*) cs from store_sales where ss_ext_sales_price > 100.00 order by cs limit 100 > {code} > {code} > STAGE PLANS: > Stage: Stage-1 > Tez > DagId: vgarg_20190227131959_2914830f-eab6-425d-b9f0-b8cb56f8a1e9:4 > Edges: > Reducer 2 <- Map 1 (CUSTOM_SIMPLE_EDGE) > Reducer 3 <- Reducer 2 (SIMPLE_EDGE) > DagName: vgarg_20190227131959_2914830f-eab6-425d-b9f0-b8cb56f8a1e9:4 > Vertices: > Map 1 > Map Operator Tree: > TableScan > alias: store_sales > filterExpr: (ss_ext_sales_price > 100) (type: boolean) > Statistics: Num rows: 1 Data size: 112 Basic stats: COMPLETE Column stats: NONE > Filter Operator > predicate: (ss_ext_sales_price > 100) (type: boolean) > Statistics: Num rows: 1 Data size: 112 Basic stats: COMPLETE Column stats: NONE > Select Operator > Statistics: Num rows: 1 Data size: 112 Basic stats: COMPLETE Column stats: NONE > Group By Operator > aggregations: count() > mode: hash > outputColumnNames: _col0 > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > Reduce Output Operator > sort order: > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > value expressions: _col0 (type: bigint) > Execution mode: vectorized > Reducer 2 > Execution mode: vectorized > Reduce Operator Tree: > Group By Operator > aggregations: count(VALUE._col0) > mode: mergepartial > outputColumnNames: _col0 > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > Reduce Output Operator > key expressions: _col0 (type: bigint) > sort order: + > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > TopN Hash Memory Usage: 0.1 > Reducer 3 > Execution mode: vectorized > Reduce Operator Tree: > Select Operator > expressions: KEY.reducesinkkey0 (type: bigint) > outputColumnNames: _col0 > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > Limit > Number of rows: 100 > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > File Output Operator > compressed: false > Statistics: Num rows: 1 Data size: 120 Basic stats: COMPLETE Column stats: NONE > table: > input format: org.apache.hadoop.mapred.SequenceFileInputFormat > output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat > serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe > Stage: Stage-0 > Fetch Operator > limit: 100 > Processor Tree: > ListSink > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)