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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-2897) Update Limit 0 to avoid parallelization
Date Wed, 29 Apr 2015 16:51:07 GMT

    [ https://issues.apache.org/jira/browse/DRILL-2897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14519711#comment-14519711
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Aman Sinha commented on DRILL-2897:
-----------------------------------

It would be good to test if the limit0 visitor is only checking for limit 0 in the outermost
query block.  Currently, you have the visitor stop if it encounters one of 5 types of logical
rels.  I am thinking there are more.  In particular, how does it stop at subquery boundaries.


Regarding TestExampleQueries.testJoin(), does it fail to plan if the planner is forced in
single mode (i.e even if you disable your limit 0 visitor and just force single mode) ?  That
test is just testing MergeJoin with False filter and does not have exchanges. 


> Update Limit 0 to avoid parallelization
> ---------------------------------------
>
>                 Key: DRILL-2897
>                 URL: https://issues.apache.org/jira/browse/DRILL-2897
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Jacques Nadeau
>            Assignee: Aman Sinha
>             Fix For: 1.0.0
>
>         Attachments: DRILL-2897.patch
>
>




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