Ruben Q L created CALCITE-3546: ---------------------------------- Summary: Improve EnumerableDefaults nested loop join Key: CALCITE-3546 URL: https://issues.apache.org/jira/browse/CALCITE-3546 Project: Calcite Issue Type: Improvement Affects Versions: 1.21.0 Reporter: Ruben Q L Assignee: Ruben Q L Fix For: 1.22.0
The current implementation of {{EnumerableDefaults#nestedLoopJoin}} builds the complete join result in a list before returning it. As specified in a comment there, this is "easy, but hogs memory". Also, it is not very efficient if after the join there is a LIMIT. An alternative implementation of nested loop join can be proposed, based on iterating through the outer an inner enumerables, and returning the results step by step (something similar to {{EnumerableDefaults#correlateJoin}}). -- This message was sent by Atlassian Jira (v8.3.4#803005)