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Posted to issues@spark.apache.org by "Lantao Jin (Jira)" <ji...@apache.org> on 2021/01/15 05:11:00 UTC

[jira] [Created] (SPARK-34122) Remove duplicated branches in case when

Lantao Jin created SPARK-34122:
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             Summary: Remove duplicated branches in case when
                 Key: SPARK-34122
                 URL: https://issues.apache.org/jira/browse/SPARK-34122
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: Lantao Jin


CaseWhen with duplicated branches could be dedup
{code}
SELECT CASE WHEN key = 1 THEN 1 WHEN key = 1 THEN 1 WHEN key = 1 THEN 1
ELSE 2 END FROM testData WHERE key = 1 group by key
{code}



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