Eugene Koifman created SPARK-33832:
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Summary: Add an option in AQE to mitigate skew even if it causes
an new shuffle
Key: SPARK-33832
URL: https://issues.apache.org/jira/browse/SPARK-33832
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Eugene Koifman
Currently {{OptimizeSkewJoin}} will not apply if skew mitigation causes a new
shuffle.
There are situations where it's better to mitigate skew even if it means a new
shuffle is added, for example if the join outputs small amount of data.
As a first step I propose adding a SQLConf option to enable this.
I'll open a PR shortly to get feedback on the approach.
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