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From "Carl Steinbach (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-1648) Automatically gathering statistics when reading a table/partition
Date Thu, 02 Feb 2012 22:38:58 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carl Steinbach updated HIVE-1648:
---------------------------------

    Component/s: Statistics
        Summary: Automatically gathering statistics when reading a table/partition  (was:
Automatically gathering stats when reading a table/partition)
    
> Automatically gathering statistics when reading a table/partition
> -----------------------------------------------------------------
>
>                 Key: HIVE-1648
>                 URL: https://issues.apache.org/jira/browse/HIVE-1648
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Statistics
>            Reporter: Ning Zhang
>            Assignee: Paul Butler
>         Attachments: HIVE-1648.2.patch, HIVE-1648.3.patch, HIVE-1648.4.patch, HIVE-1648.5.patch,
HIVE-1648.patch, hive-1648.svn.patch
>
>
> HIVE-1361 introduces a new command 'ANALYZE TABLE T COMPUTE STATISTICS' to gathering
stats. This requires additional scan of the data. Stats gathering can be piggy-backed on TableScanOperator
whenever a table/partition is scanned (given not LIMIT operator). 

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