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https://issues.apache.org/jira/browse/CALCITE-4428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17245622#comment-17245622
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Jiatao Tao commented on CALCITE-4428:
-------------------------------------
Previous in [#2222|https://github.com/apache/calcite/pull/2222], we will skip
the origin rule match when rel has been removed from its subset, but this
implement calls subset.getRelList() and it has a performance issue. The correct
way to do this is to remove the subset from mapRel2Subset.
We can use TpchTest#testQuery07 can directly reproduce the situation that
[#2222|https://github.com/apache/calcite/pull/2222] wanted to fix. Put this in
VolcanoRuleCall#match, delete the previous code, and run the test, we can see
the prints are full of the console(about 8k+). So I think still it is necessary
to do it, it can avoid lots of unless rule match.
{code:java}
if (subset != rel && !subset.getRelList().contains(rel)) {
System.out.println("Rule [{}] not fired because operand #{} ({})
belongs to obsolete set");;
}
{code}
{{}}
> Remove the equiv rel from mapRel2Subset when merging set
> --------------------------------------------------------
>
> Key: CALCITE-4428
> URL: https://issues.apache.org/jira/browse/CALCITE-4428
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jiatao Tao
> Assignee: Jiatao Tao
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
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