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From "John Sichi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1750) Remove Partition Filtering Conditions when Possible
Date Wed, 27 Oct 2010 00:00:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925209#action_12925209
] 

John Sichi commented on HIVE-1750:
----------------------------------

This is the same logic I have in IndexPredicateAnalyzer.analyzePredicate.  And it can be configured
with the specific set of columns to allow.  So you might be able to reuse it as is.


> Remove Partition Filtering Conditions when Possible
> ---------------------------------------------------
>
>                 Key: HIVE-1750
>                 URL: https://issues.apache.org/jira/browse/HIVE-1750
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>
> For some simple queries, partition filtering constraints take 8% of CPU time (now 16%
since we filter twice) even if the result is always true. When possible, we should remove
these constraints to save CPU times.

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