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From "Kannan Muthukkaruppan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-2793) Add ability to extract a specified list of versions of a column in a single roundtrip
Date Wed, 07 Jul 2010 19:00:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kannan Muthukkaruppan updated HBASE-2793:
-----------------------------------------

    Attachment: 2793_patch_v2.txt

* Removed specialized check for TimestampsFilter in ScanQueryMatcher for narrowing down time
range. (Will do that optimization once Pranav's changes (for HBase-2265) are in-- by allowing
Filters to participate in StoreFileScanner.shouldSeek() check. Each filter should be able
to participate in shouldSeek() to avoid seeking into unnecessary files.).

* Enhanced test by throwing in some  version deletes in the mix.

> 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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