Dongjoon Hyun created SPARK-14338:
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Summary: Improve `SimplifyConditionals` rule to handle `null` in
IF/CASEWHEN
Key: SPARK-14338
URL: https://issues.apache.org/jira/browse/SPARK-14338
Project: Spark
Issue Type: Improvement
Components: Optimizer, SQL
Reporter: Dongjoon Hyun
Currently, `SimplifyConditionals` handles `true` and `false` to optimize
branches. This issue improves `SimplifyConditionals` to take advantage of
`null` conditions for `if` and `CaseWhen` expressions, too.
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