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https://issues.apache.org/jira/browse/CALCITE-4512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17959571#comment-17959571
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Mihai Budiu commented on CALCITE-4512:
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I probably should not have merged this PR.
I am considering reverting it.
See [CALCITE-7052].
If I decide to revert it, I will reopen the issue.
> GROUP BY expression with argument name same with SELECT field and alias
> causes validation error
> -----------------------------------------------------------------------------------------------
>
> Key: CALCITE-4512
> URL: https://issues.apache.org/jira/browse/CALCITE-4512
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.37.0
> Environment: jvm: open-jdk11
> Reporter: yanjing.wang
> Assignee: yanjing.wang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.39.0
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> {code:java}
> String sql = "select replace(name, 'a', 'b') as name from users group by
> replace(name, 'a', 'b')";
> {code}
>
> when group by expression has argument name same with select list item alias,
> the group by argument will be expanded to select list item when sql
> conformance supports 'groupByAlias', so the above sql will be expanded to
> {code:java}
> String sql = "select replace(name, 'a', 'b') as name from users group by
> replace(replace(name, 'a', 'b'), 'a', 'b')";
> {code}
>
> this is unexpected.
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