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Date: Thu, 15 Aug 2013 17:52:11 +0000 (UTC)
From: "Lars Hofhansl (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12663357.1376376165660.73735.1376589131361@arcas>
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Subject: [jira] [Commented] (HBASE-9203) Secondary index support through
 coprocessors
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    [ https://issues.apache.org/jira/browse/HBASE-9203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13741264#comment-13741264 ] 

Lars Hofhansl commented on HBASE-9203:
--------------------------------------

[~rajesh23], I looked through the two patches. They are innocuous - just adding new coproc hooks and defaulting their actions in BaseRegionObserver (all observer should be derived from that class, although I assume it is possible that somebody implemented RegionObserver directly).

Even if we add these there would be some other kernel changes, though, right? 
                
> Secondary index support through coprocessors
> --------------------------------------------
>
>                 Key: HBASE-9203
>                 URL: https://issues.apache.org/jira/browse/HBASE-9203
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.98.0
>            Reporter: rajeshbabu
>            Assignee: rajeshbabu
>
> We have been working on implementing secondary index in HBase and open sourced  on hbase 0.94.8 version.
> The project is available on github.
> https://github.com/Huawei-Hadoop/hindex
> This Jira is to support secondary index on trunk(0.98).
> Following features will be supported.
> -          multiple indexes on table,
> -          multi column index,
> -          index based on part of a column value,
> -          equals and range condition scans using index, and
> -          bulk loading data to indexed table (Indexing done with bulk load)
> Most of the kernel changes needed for secondary index is available in trunk. Very minimal changes needed for it.

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