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 C4B3A200D43 for ; Mon, 6 Nov 2017 23:55:08 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id C35AA160C00; Mon, 6 Nov 2017 22:55:08 +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 26C9F160BEC for ; Mon, 6 Nov 2017 23:55:08 +0100 (CET) Received: (qmail 3658 invoked by uid 500); 6 Nov 2017 22:55:07 -0000 Mailing-List: contact issues-help@systemml.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@systemml.apache.org Delivered-To: mailing list issues@systemml.apache.org Received: (qmail 3644 invoked by uid 99); 6 Nov 2017 22:55:07 -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; Mon, 06 Nov 2017 22:55:07 +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 A7410CA1E8 for ; Mon, 6 Nov 2017 22:55:06 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-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 (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id aVquxajndq0R for ; Mon, 6 Nov 2017 22:55:05 +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 5C7B55FBB1 for ; Mon, 6 Nov 2017 22:55:05 +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 A347EE2596 for ; Mon, 6 Nov 2017 22:55:03 +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 6BB93241C0 for ; Mon, 6 Nov 2017 22:55:01 +0000 (UTC) Date: Mon, 6 Nov 2017 22:55:01 +0000 (UTC) From: "Matthias Boehm (JIRA)" To: issues@systemml.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Created] (SYSTEMML-2007) New order with multiple order-by columns MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Mon, 06 Nov 2017 22:55:08 -0000 Matthias Boehm created SYSTEMML-2007: ---------------------------------------- Summary: New order with multiple order-by columns Key: SYSTEMML-2007 URL: https://issues.apache.org/jira/browse/SYSTEMML-2007 Project: SystemML Issue Type: Task Reporter: Matthias Boehm There are multiple use cases, where users have to emulate an order with multiple order-by columns as follows (which works due to stable sort): {code} X = order(target=X, by=3, ...) X = order(target=X, by=2, ...) X = order(target=X, by=1, ...) {code} This causes unnecessary overhead by sorting the dataset in the number of order-by columns. Hence, this task aims to support an order function that allows both scalar and matrix {{by}} parameters. -- This message was sent by Atlassian JIRA (v6.4.14#64029)