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)
