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https://issues.apache.org/jira/browse/CALCITE-6907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17937704#comment-17937704
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Zhen Chen commented on CALCITE-6907:
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This idea is very interesting. If graphs can be reused between different
HepPrograms, can it be done between different SQL plans as well?
> Optimize HepPlanner latency for large plan
> ------------------------------------------
>
> Key: CALCITE-6907
> URL: https://issues.apache.org/jira/browse/CALCITE-6907
> Project: Calcite
> Issue Type: Improvement
> Reporter: Wenzhuang Zhu
> Priority: Major
>
> HepPlanner cannot quickly optimize plan with 10K+ rel nodes.
> We can improve it by:
> 1.HepPlanner support graph reuse for different HepProgram.
> 2.Don't do eager graph gc, e.g. for listener and graph iterator.
> 3.Use large plan friendly graph iterator.
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