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https://issues.apache.org/jira/browse/CALCITE-3937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haisheng Yuan resolved CALCITE-3937.
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Resolution: Not A Problem
Reverted in
https://github.com/apache/calcite/commit/914b6c5d0d58bfdf17d71b6fa37de469e424d969,
in case someone just wants to match RelSubset.
> Fire rule for RelSubset only when it is derived
> ------------------------------------------------
>
> Key: CALCITE-3937
> URL: https://issues.apache.org/jira/browse/CALCITE-3937
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Haisheng Yuan
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> It is meaningless to fire rule for RelSubset when it is generated by parent's
> trait requirement.
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