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https://issues.apache.org/jira/browse/OPTIQ-332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14052990#comment-14052990
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Julian Hyde commented on OPTIQ-332:
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Do you have a test case?

> Fix PushProjector so that it doesn't try cast its output to ProjectRel
> ----------------------------------------------------------------------
>
>                 Key: OPTIQ-332
>                 URL: https://issues.apache.org/jira/browse/OPTIQ-332
>             Project: Optiq
>          Issue Type: Bug
>            Reporter: Jacques Nadeau
>            Assignee: Jacques Nadeau
>
> In some cases, the project becomes trivial and thus push projector returns 
> the child rel (which could be any type of RelNode)



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