Tanel Kiis created SPARK-33122:
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Summary: Remove redundant aggregates in the Optimzier
Key: SPARK-33122
URL: https://issues.apache.org/jira/browse/SPARK-33122
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.1
Reporter: Tanel Kiis
It is possible to have two or more consecutive aggregates whose sole purpose is
to keep only distinct values (for example TPCDS q87). We can remove all but the
last one do improve performance.
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