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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-3765) Partition prune rule is unnecessary fired multiple times.
Date Tue, 15 Dec 2015 23:21:46 GMT

    [ https://issues.apache.org/jira/browse/DRILL-3765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059081#comment-15059081
] 

Rahul Challapalli commented on DRILL-3765:
------------------------------------------

[~jni] I am trying to verify this and the only thing I can think of is a performance test.
Let me know if a functional test can be added to test this patch

> Partition prune rule is unnecessary fired multiple times. 
> ----------------------------------------------------------
>
>                 Key: DRILL-3765
>                 URL: https://issues.apache.org/jira/browse/DRILL-3765
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>            Reporter: Jinfeng Ni
>            Assignee: Jinfeng Ni
>             Fix For: 1.4.0
>
>
> It seems that the partition prune rule may be fired multiple times, even after the first
rule execution has pushed the filter into the scan operator. Since partition prune has to
build the vectors to contain the partition /file / directory information, to invoke the partition
prune rule unnecessary may lead to big memory overhead.
> Drill planner should avoid the un-necessary partition prune rule, in order to reduce
the chance of hitting OOM exception, while the partition prune rule is executed.



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