Riza Suminto created IMPALA-12881:
-------------------------------------
Summary: Use JoinNode.getFkPkJoinCardinality in
reduceCardinalityForScanNode
Key: IMPALA-12881
URL: https://issues.apache.org/jira/browse/IMPALA-12881
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Riza Suminto
Assignee: Riza Suminto
IMPALA-12018 adds reduceCardinalityForScanNode to lower cardinality estimation
when runtime filter is involved. It calls
JoinNode.computeGenericJoinCardinality(). However, if the originating join node
has FK-PK conjunct, it should be possible to obtain lower cardinality estimate
by calling JoinNode.getFkPkJoinCardinality() instead.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
