yucai created SPARK-26909:
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Summary: use unsafeRow.hashCode() as hash value in HashAggregate
Key: SPARK-26909
URL: https://issues.apache.org/jira/browse/SPARK-26909
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.4.0
Reporter: yucai
This is a followup PR for #21149.
New way uses unsafeRow.hashCode() as hash value in HashAggregate.
The unsafe row has [null bit set] etc., the result should be different, and we
don't need weird `48` also.
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