ulysses you created SPARK-35221:
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Summary: Add join hint build side check
Key: SPARK-35221
URL: https://issues.apache.org/jira/browse/SPARK-35221
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.2.0
Reporter: ulysses you
Currently we support specify the join implementation with hint, but Spark did
not promised it.
For broadcast outer join and hash outer join we need to check if its build side
was supported. And at least we should print some warning log instead of
changing to other join implementation silently.
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