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https://issues.apache.org/jira/browse/CALCITE-3939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17118780#comment-17118780
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Haisheng Yuan commented on CALCITE-3939:
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Thanks for reporting the issue, [~anha].
[~botong] Can you take a look?
I am wondering why CustomScan doesn't trigger RuleX after set merge.
Does RuleX look into the siblings of Project in the RelSet through RelSubset?
> Change UnionEliminatorRule and ProjectRemoveRule to auto pruning
> SubstitutionRule
> ---------------------------------------------------------------------------------
>
> Key: CALCITE-3939
> URL: https://issues.apache.org/jira/browse/CALCITE-3939
> Project: Calcite
> Issue Type: Improvement
> Reporter: Botong Huang
> Priority: Major
> Fix For: 1.23.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> UnionEliminatorRule and ProjectRemoveRule are both pruning rules for a
> RelNode. They can also become SubstitutionRule with autoprune enabled
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