[jira] [Commented] (CALCITE-3387) Query with GROUP BY and JOIN ... USING wrongly fails with "Column 'DEPTNO' is ambiguous" error

["Chunwei Lei (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16995646#comment-16995646 ] 

Chunwei Lei commented on CALCITE-3387:
--------------------------------------

I opened a pull request: [https://github.com/apache/calcite/pull/1655].

> Query with GROUP BY and JOIN ... USING wrongly fails with "Column 'DEPTNO' is ambiguous" error
> ----------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-3387
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3387
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Chunwei Lei
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Query with GROUP BY and JOIN ... USING wrongly fails with "Column 'DEPTNO' is ambiguous" error. Here is the query:
> {code}
> select deptno, count(*)
> from emp
> join dept using (deptno)
> group by deptno;
> {code}
> Because of USING, the two deptno fields should be merged into one, and therefore {{deptno}} is not ambiguous. That query works in Oracle. Also note that
> {code}select deptno
> from emp
> join dept using (deptno)
> {code}
> works correctly in Calcite, and has since CALCITE-2227 was fixed.



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