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 C1132200CAE for ; Wed, 7 Jun 2017 08:22:24 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id BFD2E160BDE; Wed, 7 Jun 2017 06:22:24 +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 18094160BC6 for ; Wed, 7 Jun 2017 08:22:23 +0200 (CEST) Received: (qmail 16185 invoked by uid 500); 7 Jun 2017 06:22:22 -0000 Mailing-List: contact dev-help@phoenix.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@phoenix.apache.org Delivered-To: mailing list dev@phoenix.apache.org Received: (qmail 16163 invoked by uid 99); 7 Jun 2017 06:22:22 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 Jun 2017 06:22:22 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 7116FC65C0 for ; Wed, 7 Jun 2017 06:22:22 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -99.211 X-Spam-Level: X-Spam-Status: No, score=-99.211 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id v0bF6BCYwpRP for ; Wed, 7 Jun 2017 06:22:21 +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 B49F060D38 for ; Wed, 7 Jun 2017 06:22:20 +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 92A22E0DDA for ; Wed, 7 Jun 2017 06:22:19 +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 9047321E1A for ; Wed, 7 Jun 2017 06:22:18 +0000 (UTC) Date: Wed, 7 Jun 2017 06:22:18 +0000 (UTC) From: "Loknath Priyatham Teja Singamsetty (JIRA)" To: dev@phoenix.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (PHOENIX-3773) Implement FIRST_VALUES aggregate function MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Wed, 07 Jun 2017 06:22:24 -0000 [ https://issues.apache.org/jira/browse/PHOENIX-3773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Loknath Priyatham Teja Singamsetty updated PHOENIX-3773: --------------------------------------------------------- Attachment: (was: PHOENIX-3773_master_final.patch) > Implement FIRST_VALUES aggregate function > ----------------------------------------- > > Key: PHOENIX-3773 > URL: https://issues.apache.org/jira/browse/PHOENIX-3773 > Project: Phoenix > Issue Type: New Feature > Reporter: James Taylor > Assignee: Loknath Priyatham Teja Singamsetty > Labels: SFDC > Fix For: 4.11.0 > > Attachments: PHOENIX-3773_4.x-HBase-0.98.patch, PHOENIX-3773_4.x-HBase-0.98_v2.patch, PHOENIX-3773_master.patch, PHOENIX-3773_master_v2.patch, PHOENIX-3773.patch, PHOENIX-3773.v2.patch, PHOENIX-3773.v3.patch > > > Similar to FIRST_VALUE, but would allow the user to specify how many values to keep. This could use a MinMaxPriorityQueue under the covers and be much more efficient than using multiple NTH_VALUE calls to do the same like this: > {code} > SELECT entity_id, > NTH_VALUE(user_id,1) WITHIN GROUP (ORDER BY last_read_date DESC) as nth1_user_id, > NTH_VALUE(user_id,2) WITHIN GROUP (ORDER BY last_read_date DESC) as nth2_user_id, > NTH_VALUE(user_id,3) WITHIN GROUP (ORDER BY last_read_date DESC) as nth3_user_id, > count(*) > FROM MY_TABLE > WHERE tenant_id='00Dx0000000XXXX' > AND entity_id in ('0D5x000000ABCD','0D5x000000ABCE') > GROUP BY entity_id; > {code} -- This message was sent by Atlassian JIRA (v6.3.15#6346)