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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 Wed, 07 Jul 2010 22:11:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12886108#action_12886108
] 

HBase Review Board commented on HBASE-2793:
-------------------------------------------

Message from: "Ryan Rawson" <ryanobjc@gmail.com>

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This is an automatically generated e-mail. To reply, visit:
http://review.hbase.org/r/268/#review317
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trunk/src/main/java/org/apache/hadoop/hbase/filter/TimestampsFilter.java
<http://review.hbase.org/r/268/#comment1382>

    by default if somehow the minTimeStamp gets kept as 0 with an empty timestamps list, then
it will filter _everything out_.  Do you want to set this to 0 and instead include everything
by default?  Might make it easier to debug perhaps?
    



trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java
<http://review.hbase.org/r/268/#comment1383>

    i dont think this import is necessary...



trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java
<http://review.hbase.org/r/268/#comment1384>

    nor this one


- Ryan





> 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
>         Attachments: 2793_patch_v1.txt, 2793_patch_v2.txt
>
>
> 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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