weijie.tong created DRILL-7284:
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Summary: reusing the hashCodes computed at exchange nodes
Key: DRILL-7284
URL: https://issues.apache.org/jira/browse/DRILL-7284
Project: Apache Drill
Issue Type: New Feature
Reporter: weijie.tong
Assignee: weijie.tong
Fix For: 1.17.0
To HashJoin or HashAggregate, we will shuffle the input data according to
hashCodes of join conditions or group by keys at the exchange nodes. This
computing of the hash codes will be redo at the HashJoin or HashAggregate
nodes. We could send the computed hashCodes of exchange nodes to the upper
nodes. So the HashJoin or HashAggregate nodes will not need to do the hash
computing again.
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