[CALCITE-4257] Improve CachingRelMetadataProvider

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: core
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: James Starr
• Created: 14/Sep/20 23:55
• Updated: 16/Mar/21 18:11
• Resolved: 16/Mar/21 18:11

Description

CachingRelMetadataProvider.cached should be parametrizable to allow for usage of LRU or soft reference maps. Furthermore, a mechanism should be added to prevent RelNode from being cached. Finally, trivial calls should not be cached, because it likely as expensive to cache them as it is just perform them again.

Issue Links

• links to: GitHub Pull Request #2150