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https://issues.apache.org/jira/browse/CALCITE-1059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1059:
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Fix Version/s: 1.7.0
> Not valid to convert Aggregate with on empty to empty if its GROUP BY key is
> empty
> ----------------------------------------------------------------------------------
>
> Key: CALCITE-1059
> URL: https://issues.apache.org/jira/browse/CALCITE-1059
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Fix For: 1.7.0
>
>
> It it not valid to convert Aggregate with on empty to empty if its GROUP BY
> key is empty. Consider the following SQL:{code}SELECT count(*) FROM emp WHERE
> FALSE{code} Even though the input is empty, the output is one row.
> Fix affects PruneEmptyRules.AGGREGATE_INSTANCE.
> Also, add a RelBuilderFactory argument to all rules in PruneEmptyRules and
> call RelBuilder.empty rather than LogicalValues.createEmpty.
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