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https://issues.apache.org/jira/browse/HBASE-7474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543682#comment-13543682
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Anil Gupta commented on HBASE-7474:
-----------------------------------
How to try out the patch?
By default the patch contains an end-end implementation for sorting based on
BigDecimal column. In order to support any other datatype you just need to
implement SortingColumnInterpreter interface.
Steps required to do sorting:
1.Instantiate a class which implements SortingColumnInterpreter.
2.Prepare the scan object
3.Instantiate the HTable
4.Instantiate SortingClient
5.Invoke the method of sorting client.
> Endpoint Implementation to support Scans with Sorting of Rows based on column
> values(similar to "order by" clause of RDBMS)
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-7474
> URL: https://issues.apache.org/jira/browse/HBASE-7474
> Project: HBase
> Issue Type: New Feature
> Components: Coprocessors, Scanners
> Affects Versions: 0.94.3
> Reporter: Anil Gupta
> Priority: Minor
> Labels: coprocessors, scan, sort
> Fix For: 0.94.5
>
> Attachments: hbase-7474.patch,
> SortingEndpoint_high_level_flowchart.pdf
>
>
> Recently, i have developed an Endpoint which can sort the Results(rows) on
> the basis of column values. This functionality is similar to "order by"
> clause of RDBMS. I will be submitting this Patch for HBase0.94.3
> I am almost done with the initial development and testing of feature. But, i
> need to write the JUnits for this. I will also try to make design doc.
> Thanks,
> Anil Gupta
> Software Engineer II, Intuit, inc
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