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Posted to issues@calcite.apache.org by "Haisheng Yuan (Jira)" <ji...@apache.org> on 2020/04/16 16:05:00 UTC

[jira] [Created] (CALCITE-3932) Make data type cache thread local, non-evictable

Haisheng Yuan created CALCITE-3932:
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             Summary: 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


Data type can be evicted out of cache, which is global, thread-safe. `=` based type comparison may suffer from cache eviction. 

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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