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From "John Sichi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1648) Automatically gathering stats when reading a table/partition
Date Fri, 05 Nov 2010 20:14:47 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928804#action_12928804
] 

John Sichi commented on HIVE-1648:
----------------------------------

Obtained Paul Butler's account name from the JIRA change history...I'll add him as contributor.


> Automatically gathering stats when reading a table/partition
> ------------------------------------------------------------
>
>                 Key: HIVE-1648
>                 URL: https://issues.apache.org/jira/browse/HIVE-1648
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Ning Zhang
>         Attachments: HIVE-1648.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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