[CALCITE-3403] WindowReduceExpressionsRule does not reuse RelMetadataQuery

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.22.0
• Labels: pull-request-available
• Assignee: Jin Xing
• Reporter: Haisheng Yuan
• Created: 11/Oct/19 21:09
• Updated: 06/Mar/20 04:34
• Resolved: 15/Oct/19 20:58

Description

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.

Issue Links

• links to: GitHub Pull Request #1508