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Date: Tue, 7 Oct 2014 21:49:34 +0000 (UTC)
From: "stack (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12741724.1410859108000.212479.1412718574899@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-11990) Make setting the start and stop
 row for a specific prefix easier
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    [ https://issues.apache.org/jira/browse/HBASE-11990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162610#comment-14162610 ] 

stack commented on HBASE-11990:
-------------------------------

[~misty] There is an addition to the refguide in the patch

> 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: 11990v4.txt, HBASE-11990-20140916-v2.patch, HBASE-11990-20140916-v3.patch, HBASE-11990-20140916-v5.patch, HBASE-11990-20140916-v6.patch, HBASE-11990-20140916.patch, HBASE-11990-20140917-v7.patch, HBASE-11990-20140919-v8.patch, HBASE-11990-20140921-v9.patch, HBASE-11990-20140923-v10.patch, HBASE-11990-20140923-v10.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 }{code}
> I have prepared a proposed patch that makes setting these values correctly a lot easier.


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