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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1538) FilterOperator is applied twice with ppd on.
Date Mon, 06 Sep 2010 04:15:33 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906428#action_12906428

Amareshwari Sriramadasu commented on HIVE-1538:

With predicate pushdown on, the final candidates for predicate pushdown are collected for
the top operator. 
And a FilterOperator is created, with the final candidates, as a child of TableScanOperator
(topOp). But the operators (FilterOperators) whose predicates are pushed down, are not removed.
I think the solution is to collect the operators who are contributing the predicates for "final
candidates of predicare pushdown" and remove them from the final operator graph.

> 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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