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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