Haisheng Yuan created CALCITE-3403:
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Summary: WindowReduceExpressionsRule does not reuse
RelMetadataQuery
Key: CALCITE-3403
URL: https://issues.apache.org/jira/browse/CALCITE-3403
Project: Calcite
Issue Type: Improvement
Reporter: Haisheng Yuan
It creates a new RelMetadataQuery instance, which is a fresh RelMetadataQuery
without any data cache. We should get RelMetadataQuery from RelOptRuleCall to
reuse cache as much as possible.
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