Zoltán Borók-Nagy created IMPALA-10903:
------------------------------------------
Summary: Do a PARTITIONED ANTI HASH JOIN when there are lots of
deleted rows
Key: IMPALA-10903
URL: https://issues.apache.org/jira/browse/IMPALA-10903
Project: IMPALA
Issue Type: Sub-task
Components: Frontend
Reporter: Zoltán Borók-Nagy
Impala currently always does a BROADCAST join between base/delta files and
delete delta files:
[https://github.com/apache/impala/blob/45d3eddc056bc28ee43efa6307cd673062936a41/fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java#L1726]
When there are lots of deleted rows a PARTITIONED hash join can be more
efficient.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
