Steve Carlin created HIVE-27238:
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Summary: Avoid Calcite Code generation for RelMetaDataProvider on
every query
Key: HIVE-27238
URL: https://issues.apache.org/jira/browse/HIVE-27238
Project: Hive
Issue Type: Improvement
Components: HiveServer2
Reporter: Steve Carlin
In CalcitePlanner, we are instantiating a new CachingRelMetadataProvider on
every query. Within the Calcite code, they keep the provider key to prevent a
new MetadataHandler class from being created. But by generating a new
provider, the cache never gets a hit so we keep instantiating new
MetadataHandlers.
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