[jira] [Created] (SPARK-30829) Define LegacyBehaviorPolicy enumeration as the common value for result change configs

["Yuanjian Li (Jira)" <ji...@apache.org>]

Yuanjian Li created SPARK-30829:
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             Summary: Define LegacyBehaviorPolicy enumeration as the common value for result change configs
                 Key: SPARK-30829
                 URL: https://issues.apache.org/jira/browse/SPARK-30829
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Yuanjian Li


During API auditing for the 3.0 release, we found several new approaches that will change the results silently. For these features, we create a common config value, which is a three-value enumeration. Whenever the new behavior will silently change the results, this config can be reused.
 * Exception(default): Spark will throw an exception while result changes will happen, and remind users to choose between legacy and new behavior.
 * New Behavior: Use the new approach.
 * Legacy: Use the legacy behavior of earlier versions.



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