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From "Shreepadma Venugopalan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3526) Column Statistics - Add support for equi-height histograms on numeric columns
Date Wed, 03 Oct 2012 22:11:08 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468905#comment-13468905
] 

Shreepadma Venugopalan commented on HIVE-3526:
----------------------------------------------

HIVE-1362 covers the task of adding support for column level statistics in Hive.
                
> Column Statistics - Add support for equi-height histograms on numeric columns
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-3526
>                 URL: https://issues.apache.org/jira/browse/HIVE-3526
>             Project: Hive
>          Issue Type: Bug
>          Components: Statistics
>    Affects Versions: 0.10.0
>            Reporter: Shreepadma Venugopalan
>            Assignee: Shreepadma Venugopalan
>
> This JIRA covers the task of adding support for equi-height histograms on numeric columns
in Hive tables and partitions. This task involves a) implementing a UDAF to compute equi-height
histograms on numeric columns, b) persisting the histogram to the metastore along with other
column statistics , c) enhancing the thrift api to retrieve the histogram along with the other
statistics and d) extending the grammar of ANALYZE to allow the user to request histograms
and specify the number of bins.

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