From notifications-return-49269-archive-asf-public=cust-asf.ponee.io@accumulo.apache.org Mon Apr 22 20:02:02 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 [207.244.88.153]) by mx-eu-01.ponee.io (Postfix) with SMTP id 0587C18064D for ; Mon, 22 Apr 2019 22:02:01 +0200 (CEST) Received: (qmail 18705 invoked by uid 500); 22 Apr 2019 20:02:01 -0000 Mailing-List: contact notifications-help@accumulo.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: jira@apache.org Delivered-To: mailing list notifications@accumulo.apache.org Received: (qmail 18692 invoked by uid 99); 22 Apr 2019 20:02:01 -0000 Received: from mailrelay1-us-west.apache.org (HELO mailrelay1-us-west.apache.org) (209.188.14.139) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 22 Apr 2019 20:02:01 +0000 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 ADD49E2AEB for ; Mon, 22 Apr 2019 20:02:00 +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 4A17325812 for ; Mon, 22 Apr 2019 20:02:00 +0000 (UTC) Date: Mon, 22 Apr 2019 20:02:00 +0000 (UTC) From: "Christopher Tubbs (JIRA)" To: notifications@accumulo.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Resolved] (ACCUMULO-394) Provide framework for combining multiple columns 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/ACCUMULO-394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Christopher Tubbs resolved ACCUMULO-394. ---------------------------------------- Resolution: Won't Fix This can already be done with iterators more generally, rather than special-purpose combiners. If this is still an issue, please open an issue on GitHub, where we now track issues: https://github.com/apache/accumulo/issues > Provide framework for combining multiple columns > ------------------------------------------------ > > Key: ACCUMULO-394 > URL: https://issues.apache.org/jira/browse/ACCUMULO-394 > Project: Accumulo > Issue Type: New Feature > Reporter: John Vines > Priority: Trivial > > Currently the combiner frameworks provides mechanisms for users to reduce the values of all Keys down to the column visibility label. I imagine there are cases where users want to combine all values for all visibilities of a column family, or even a row. Perhaps even just combine visibilities. Also, to extend combination to those Key elements instead of just values. There's a lot of ways to generalize this problem space, and I think it's something worth looking into. I think we should be able to use something similar to the current Combiner framework, except the reduce function's input Key is a partial key for the amount of uniqueness being saught. The majority of it should be straight forward, with the exception of visibilities which should be logically ANDed together (but this may be something we want to defer to the combiner's writer, I don't know). -- This message was sent by Atlassian JIRA (v7.6.3#76005)