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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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