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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-1538) FilterOperator is applied twice with ppd on.
Date Wed, 27 Jan 2016 05:12:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118669#comment-15118669
] 

Ashutosh Chauhan commented on HIVE-1538:
----------------------------------------

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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