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https://issues.apache.org/jira/browse/CALCITE-3666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Sitnikov resolved CALCITE-3666.
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Fix Version/s: 1.22.0
Resolution: Fixed
Fixed in
https://github.com/apache/calcite/commit/7dcceeedbc9bb28167f3b7497a8eee1429bc51f6
> Refine RelMdUniqueKeys and RelMdColumnUniqueness for Calc
> ---------------------------------------------------------
>
> Key: CALCITE-3666
> URL: https://issues.apache.org/jira/browse/CALCITE-3666
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.21.0
> Reporter: Vladimir Sitnikov
> Assignee: Vladimir Sitnikov
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.22.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> RelMdColumnUniqueness does not have an override for Calc, thus it can't
> resolve uniqueness for EnumerableCalc
> In practice, it is hard to deduce uniqueness for select emp.id*emp.deptno
> from emp, however, simple projects can be resolved (e.g. when Calc selects
> one of its input as is).
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