Cheng Su created SPARK-37455:
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Summary: Replace hash with sort aggregate if child is already
sorted
Key: SPARK-37455
URL: https://issues.apache.org/jira/browse/SPARK-37455
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.3.0
Reporter: Cheng Su
In the query plan, if the child of hash aggregate is already sorted on group-by
columns, we can replace hash aggregate with sort aggregate for better
performance, as sort aggregate does not have hashing overhead of hash aggregate.
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