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https://issues.apache.org/jira/browse/CALCITE-4512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17331646#comment-17331646
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Julian Hyde commented on CALCITE-4512:
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{quote}they both don't support alias in cube expression, I think calcite should
behave in same way.
{quote}
I am surprised by that. I would expect the rules for top-level expressions in a
CUBE or ROLLUP of GROUPING SET to be the same for a top-level expression in a
GROUP BY, and I think that should be Calcite's behavior.
BigQuery only supports ROLLUP, but it is consistent with my expectation. The
following query is valid on BigQuery:
{code:java}
SELECT empno + deptno AS x, empno - deptno AS y
FROM scott.emp
GROUP BY ROLLUP(x, y, empno) {code}
> group by expression has argument name same with select list item 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: 1.26.0
> Environment: jvm: open-jdk8
> Reporter: yanjing.wang
> Priority: Major
>
> String sql = "select replace(name, 'a', 'b') as name from users group by
> replace(name, 'a', 'b')";
>
> 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
> String sql = "select replace(name, 'a', 'b') as name from users group by
> replace(replace(name, 'a', 'b'), 'a', 'b')";
>
> this is unexpected.
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