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https://issues.apache.org/jira/browse/CALCITE-2784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16745551#comment-16745551
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Julian Hyde commented on CALCITE-2784:
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I think I saw something like this a couple of days ago. It was generating
{{FROM (SELECT NULL LIMIT 5)}} inside a query to be sent to MySQL. MySQL was
complaining that there was no "AS tableAlias". But also there should have been
N columns, not just one.
> RelToSqlConverter is crashing when converting an empty Values RelNode
> ---------------------------------------------------------------------
>
> Key: CALCITE-2784
> URL: https://issues.apache.org/jira/browse/CALCITE-2784
> Project: Calcite
> Issue Type: Bug
> Reporter: Mehrez DOUAIHY
> Assignee: Julian Hyde
> Priority: Major
>
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