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From "HBase Review Board (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2793) Add ability to extract a specified list of versions of a column in a single roundtrip
Date Tue, 06 Jul 2010 16:30:51 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885586#action_12885586

HBase Review Board commented on HBASE-2793:

Message from: "Kannan Muthukkaruppan" <kannan@facebook.com>

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(Updated 2010-07-06 09:19:52.326413)

Review request for hbase.


Discussion up in https://issues.apache.org/jira/browse/HBASE-2793.

Using the Filter approach as discussed.

This addresses bug HBASE-2793.


  trunk/src/main/java/org/apache/hadoop/hbase/filter/Filter.java 960691 
  trunk/src/main/java/org/apache/hadoop/hbase/filter/TimestampsFilter.java PRE-CREATION 
  trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java 960691 
  trunk/src/test/java/org/apache/hadoop/hbase/client/TestTimestampsFilter.java PRE-CREATION

Diff: http://review.hbase.org/r/268/diff


The new unit test for TimestampsFilter passes. Running unit tests right now.



> Add ability to extract a specified list of versions of a column in a single roundtrip
> -------------------------------------------------------------------------------------
>                 Key: HBASE-2793
>                 URL: https://issues.apache.org/jira/browse/HBASE-2793
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Kannan Muthukkaruppan
>            Assignee: Kannan Muthukkaruppan
> In one of the use cases we were looking at, each row contains a single column, but with
several versions (e.g., each version representing an event in a log), and we want to be able
to extract specific set of versions from the row in a single round-trip.
> Currently, on a Get, one can retrieve a specific version of a column using setTimeStamp(ts)
or a range of versions using setTimeRange(min, max). But not a set of specified versions.
It would be useful to add this ability.

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