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https://issues.apache.org/jira/browse/CALCITE-3932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haisheng Yuan resolved CALCITE-3932.
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Resolution: Won't Fix
> Make data type cache thread local, non-evictable
> ------------------------------------------------
>
> Key: CALCITE-3932
> URL: https://issues.apache.org/jira/browse/CALCITE-3932
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Haisheng Yuan
> Priority: Major
> Fix For: 1.23.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Data type can be evicted out of cache, which is global, thread-safe.
> It seems not necessary to cache them globally, because most of them are
> RelRecordType, which is query dependent, not sharable between different
> queries.
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