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 C61E8200C76 for ; Sat, 8 Apr 2017 00:58:46 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id C4A34160B97; Fri, 7 Apr 2017 22:58:46 +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 21A6A160BA2 for ; Sat, 8 Apr 2017 00:58:45 +0200 (CEST) Received: (qmail 53861 invoked by uid 500); 7 Apr 2017 22:58:45 -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 53684 invoked by uid 99); 7 Apr 2017 22:58:45 -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; Fri, 07 Apr 2017 22:58:45 +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 E372AC047D for ; Fri, 7 Apr 2017 22:58:44 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -100.002 X-Spam-Level: X-Spam-Status: No, score=-100.002 tagged_above=-999 required=6.31 tests=[RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id aWeKL2o0pKVW for ; Fri, 7 Apr 2017 22:58:44 +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 BEFFB5F4AC for ; Fri, 7 Apr 2017 22:58:43 +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 D98D4E0AB0 for ; Fri, 7 Apr 2017 22:58:42 +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 030C524067 for ; Fri, 7 Apr 2017 22:58:42 +0000 (UTC) Date: Fri, 7 Apr 2017 22:58:42 +0000 (UTC) From: "James Taylor (JIRA)" To: dev@phoenix.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Created] (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: Fri, 07 Apr 2017 22:58:46 -0000 James Taylor created PHOENIX-3773: ------------------------------------- Summary: Implement FIRST_VALUES aggregate function Key: PHOENIX-3773 URL: https://issues.apache.org/jira/browse/PHOENIX-3773 Project: Phoenix Issue Type: Bug Reporter: James Taylor 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)