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https://issues.apache.org/jira/browse/CALCITE-1584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15828731#comment-15828731
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Jess Balint commented on CALCITE-1584:
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hey Julian, This is the same issue I brought up on the mailing list, subj
"ProjectRemoveRule checking RelNode type".
The rule is seeing a {{HepRelVertex}} but checking if it's an instance of
{{Project}}.
> ProjectRemoveRule loses field names
> -----------------------------------
>
> Key: CALCITE-1584
> URL: https://issues.apache.org/jira/browse/CALCITE-1584
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jess Balint
> Assignee: Julian Hyde
> Priority: Minor
>
> the rule doesn't properly identify a child {{Project}} node
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