Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id E2239116E4 for ; Tue, 16 Sep 2014 09:48:39 +0000 (UTC) Received: (qmail 68877 invoked by uid 500); 16 Sep 2014 09:48:34 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 68757 invoked by uid 500); 16 Sep 2014 09:48:34 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 68454 invoked by uid 99); 16 Sep 2014 09:48:33 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 16 Sep 2014 09:48:33 +0000 Date: Tue, 16 Sep 2014 09:48:33 +0000 (UTC) From: "Niels Basjes (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-11990) Make setting the start and stop row for a specific prefix easier 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/HBASE-11990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Niels Basjes updated HBASE-11990: --------------------------------- Description: If you want to set a scan from your application to scan for a specific row prefix this is actually quite hard. As described in several places you can set the startRow to the prefix; yet the stopRow should be set to the prefix '+1' If the prefix 'ASCII' put into a byte[] then this is easy because you can simply increment the last byte of the array. But if your application uses real binary rowids you may run into the scenario that your prefix is something like {code}{ 0x12, 0x23, 0xFF, 0xFF }{code} Then the increment should be {code}{ 0x12, 0x24, 0x00, 0x00 }{code} I have prepared a proposed patch that makes setting these values correctly a lot easier. was: If you want to set a scan from your application to scan for a specific row prefix this is actually quite hard. As described in several places you can set the startRow to the prefix; yet the stopRow should be set to the prefix '+1' If the prefix 'ASCII' put into a byte[] then this is easy because you can simply increment the last byte of the array. But if your application uses real binary rowids you may run into the scenario that your prefix is something like { 0x12, 0x23, 0xFF, 0xFF }. Then the increment should be { 0x12, 0x24, 0x00, 0x00 }. I have prepared a proposed patch that makes setting these values correctly a lot easier. > Make setting the start and stop row for a specific prefix easier > ---------------------------------------------------------------- > > Key: HBASE-11990 > URL: https://issues.apache.org/jira/browse/HBASE-11990 > Project: HBase > Issue Type: New Feature > Components: Client > Reporter: Niels Basjes > Attachments: HBASE-11990-20140916.patch > > > If you want to set a scan from your application to scan for a specific row prefix this is actually quite hard. > As described in several places you can set the startRow to the prefix; yet the stopRow should be set to the prefix '+1' > If the prefix 'ASCII' put into a byte[] then this is easy because you can simply increment the last byte of the array. > But if your application uses real binary rowids you may run into the scenario that your prefix is something like > {code}{ 0x12, 0x23, 0xFF, 0xFF }{code} Then the increment should be {code}{ 0x12, 0x24, 0x00, 0x00 }{code} > I have prepared a proposed patch that makes setting these values correctly a lot easier. -- This message was sent by Atlassian JIRA (v6.3.4#6332)