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https://issues.apache.org/jira/browse/CALCITE-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075580#comment-16075580
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Julian Hyde commented on CALCITE-1873:
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Reviewing and testing now.
> Validator errors when grouping by ordinals that refer to aliases
> ----------------------------------------------------------------
>
> Key: CALCITE-1873
> URL: https://issues.apache.org/jira/browse/CALCITE-1873
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Gian Merlino
> Assignee: Julian Hyde
>
> In a "GROUP BY ordinal" query, validator gives invalid "Expression is not
> being grouped" error if column has alias.
> Patch in https://github.com/apache/calcite/pull/490.
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