L. C. Hsieh created SPARK-33337:
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Summary: Support subexpression elimination in branches of
conditional expressions
Key: SPARK-33337
URL: https://issues.apache.org/jira/browse/SPARK-33337
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.1.0
Reporter: L. C. Hsieh
Assignee: L. C. Hsieh
Currently we skip subexpression elimination in branches of conditional
expressions including {{If}}, {{CaseWhen}}, and {{Coalesce}}. Actually we can
do subexpression elimination for such branches if the subexpression is common
across all branches.
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