[jira] [Created] (SPARK-40099) Merge adjacent CaseWhen branches if their values are the same

["Yuming Wang (Jira)" <ji...@apache.org>]

Yuming Wang created SPARK-40099:
-----------------------------------

             Summary: Merge adjacent CaseWhen branches if their values are the same
                 Key: SPARK-40099
                 URL: https://issues.apache.org/jira/browse/SPARK-40099
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.4.0
            Reporter: Yuming Wang


For example:
{code:sql}
          CASE
                    WHEN f1.buyer_id IS NOT NULL THEN 1
                    WHEN f2.buyer_id IS NOT NULL THEN 1
                    ELSE 0
          END
{code}

The excepted result:
{code:sql}
          CASE
                    WHEN f1.buyer_id IS NOT NULL or f2.buyer_id IS NOT NULL THEN 1
                    ELSE 0
          END
{code}




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