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https://issues.apache.org/jira/browse/CALCITE-1584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16031417#comment-16031417
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Julian Hyde commented on CALCITE-1584:
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Maybe use metadata for column names. Ask some of the Drill old-timers - they
are aware that Drill's strong reliance on field names has always been at odds
with how Calcite works.
> 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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