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https://issues.apache.org/jira/browse/HIVE-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906666#action_12906666
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Namit Jain commented on HIVE-1538:
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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: https://issues.apache.org/jira/browse/HIVE-1538
> 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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