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 892DA2009F3 for ; Fri, 20 May 2016 19:36:16 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 87C90160A24; Fri, 20 May 2016 17:36:16 +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 D20D71609AE for ; Fri, 20 May 2016 19:36:15 +0200 (CEST) Received: (qmail 16736 invoked by uid 500); 20 May 2016 17:36:15 -0000 Mailing-List: contact dev-help@datafu.incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@datafu.incubator.apache.org Delivered-To: mailing list dev@datafu.incubator.apache.org Received: (qmail 16725 invoked by uid 99); 20 May 2016 17:36:15 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 20 May 2016 17:36:15 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id ACB18180592 for ; Fri, 20 May 2016 17:36:14 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -4.021 X-Spam-Level: X-Spam-Status: No, score=-4.021 tagged_above=-999 required=6.31 tests=[KAM_LAZY_DOMAIN_SECURITY=1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-0.001] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id sE_bYXKsd13y for ; Fri, 20 May 2016 17:36:14 +0000 (UTC) Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with SMTP id B08EA5F298 for ; Fri, 20 May 2016 17:36:13 +0000 (UTC) Received: (qmail 16290 invoked by uid 99); 20 May 2016 17:36:13 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 20 May 2016 17:36:13 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id D209E2C1F5C for ; Fri, 20 May 2016 17:36:12 +0000 (UTC) Date: Fri, 20 May 2016 17:36:12 +0000 (UTC) From: "Matthew Hayes (JIRA)" To: dev@datafu.incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (DATAFU-117) New UDF - CountDistinctUpTo MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Fri, 20 May 2016 17:36:16 -0000 [ https://issues.apache.org/jira/browse/DATAFU-117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Matthew Hayes updated DATAFU-117: --------------------------------- Assignee: Eyal Allweil > New UDF - CountDistinctUpTo > --------------------------- > > Key: DATAFU-117 > URL: https://issues.apache.org/jira/browse/DATAFU-117 > Project: DataFu > Issue Type: New Feature > Reporter: Eyal Allweil > Assignee: Eyal Allweil > Attachments: DATAFU-117-2.patch, DATAFU-117-3.patch, DATAFU-117.patch > > > A UDF that counts distinct tuples within a bag, but only up to a preset limit. If the bag contains more distinct tuples than the limit, the UDF returns the limit. > This UDF can run reasonably well even on large bags if the limit chosen is small enough though the count is done in memory. > We use this UDF in PayPal for filtering, when we don't need to use the actual tuples afterward. -- This message was sent by Atlassian JIRA (v6.3.4#6332)