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From "Namit Jain (JIRA)" <>
Subject [jira] Commented: (HIVE-1538) FilterOperator is applied twice with ppd on.
Date Tue, 07 Sep 2010 04:20:33 GMT


Namit Jain commented on HIVE-1538:

That is right - this has nothing to do with map join.
Whenever, a predicate is pushed down, it is also retained, thereby having 2 identical filters.

Is this creating a performance problem ? It can definitely be optimized.
I totally agree with your proposed solution.

> FilterOperator is applied twice with ppd on.
> --------------------------------------------
>                 Key: HIVE-1538
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amareshwari Sriramadasu
> With hive.optimize.ppd set to true, FilterOperator is applied twice. And it seems second
operator is always filtering zero rows.

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