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https://issues.apache.org/jira/browse/CALCITE-4915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17452909#comment-17452909
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Vladimir Sitnikov commented on CALCITE-4915:
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{quote}I've found some bugs during testing of NATURAL JOINs in our framework,
each bug should be investigated first to be sure that the problem is in Calcite
and not in our code, after investigation I've filed a ticket and pretty
straightforward fix. Of course for complex tickets, it's better to discuss
first, before the implementation.{quote}
+100500. This is a clear bug, and we do not need a JIRA ticket for it. Just PR
would be enough
> Query with unqualified common column and NATURAL JOIN fails
> -----------------------------------------------------------
>
> Key: CALCITE-4915
> URL: https://issues.apache.org/jira/browse/CALCITE-4915
> Project: Calcite
> Issue Type: Bug
> Reporter: Aleksey Plekhanov
> Assignee: Aleksey Plekhanov
> Priority: Major
> Labels: pull-request-available
>
> Query with unqualified common column and NATURAL JOIN:
> {noformat}
> SELECT deptno FROM emp NATURAL JOIN dept{noformat}
> Fails with "Column 'DEPTNO' is ambiguous" error.
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