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https://issues.apache.org/jira/browse/CALCITE-3791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chunwei Lei updated CALCITE-3791:
---------------------------------
Summary: HepPlanner doesn't clear metadata cache for the ancestors of
discarded node when a transformation happens (was: HepPlanner does't clear
metadata cache for the ancestors of discarded node when a transformation
happens)
> HepPlanner doesn't clear metadata cache for the ancestors of discarded node
> when a transformation happens
> ---------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-3791
> URL: https://issues.apache.org/jira/browse/CALCITE-3791
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Chunwei Lei
> Assignee: Chunwei Lei
> Priority: Major
>
> In HepPlanner, when a transformation happens, it will clear metadata cache
> for the parent of the discarded node[1]. But it doesn't clear the metadata
> cache for the ancestors of the parent. For example, assume we get a logical
> plan like
> A
> \
> B
> \
> C
> , if we clear the metadata cache for C after applying a rule, we should also
> clear the metadata cache for A and B since metadata of A and B derive from C.
>
> [1][https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/plan/hep/HepPlanner.java#L877]
>
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