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https://issues.apache.org/jira/browse/CALCITE-3681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17009154#comment-17009154
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Vladimir Sitnikov commented on CALCITE-3681:
--------------------------------------------
Note: the fix can be found in
https://github.com/apache/calcite/pull/1702/commits (see [CALCITE-3681] Refine
RelMdColumnUniquenes commit)
{quote}There are problems with RelMdRowCount too,{quote}
I have fixed it as well.
All those metadata/cost/... can't be tested in isolation, so "overall patch
queue" can be found in PR#1702. Hopefully, some changes could be extracted and
merged individually, however, I would prefer to see workable solution in
PR#1702, and only then extract relevant bits to master.
{quote} Also review how RelMdMinRowCount{quote}
Is MinRowCount used at all? I thought it was not that useful, so I skipped it
for now.
> Refine RelMdColumnUniqueness and RelMdRowCount for Aggregate
> ------------------------------------------------------------
>
> Key: CALCITE-3681
> URL: https://issues.apache.org/jira/browse/CALCITE-3681
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.21.0
> Reporter: Vladimir Sitnikov
> Assignee: Vladimir Sitnikov
> Priority: Major
>
> Aggregate might have grouping sets, so
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