[jira] [Updated] (HBASE-11990) Make setting the start and stop row for a specific prefix easier

["Niels Basjes (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-11990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Niels Basjes updated HBASE-11990:
---------------------------------
    Attachment: HBASE-11990-20140916.patch

Proposed patch.
This also fixes the same documentation issue from HBASE-9035 in the javadoc of the setStopRow method.

> 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 { 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.



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