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https://issues.apache.org/jira/browse/HIVE-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118669#comment-15118669
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Ashutosh Chauhan commented on HIVE-1538:
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More like: "During query optimization filters may be pushed down in operator
tree. If this config is false, original filter is also left in operator tree at
original place. If config is true, only pushed down filters remain in operator
tree, original filter is removed. This optimization is always valid and useful,
thus there is no reason to set this config to false, other than implementation
bug, which may remove filter from both places."
> FilterOperator is applied twice with ppd on.
> --------------------------------------------
>
> Key: HIVE-1538
> URL: https://issues.apache.org/jira/browse/HIVE-1538
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.8.0
>
> Attachments: patch-1538-1.txt, patch-1538-2.txt, patch-1538-3.txt,
> patch-1538-4.txt, patch-1538.txt
>
>
> 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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