cloud-fan commented on a change in pull request #30852:
URL: https://github.com/apache/spark/pull/30852#discussion_r547723985
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SimplifyConditionalSuite.scala
##########
@@ -215,4 +215,24 @@ class SimplifyConditionalSuite extends PlanTest with
ExpressionEvalHelper with P
If(GreaterThan(Rand(0), UnresolvedAttribute("a")), FalseLiteral,
TrueLiteral),
LessThanOrEqual(Rand(0), UnresolvedAttribute("a")))
}
+
+ test("SPARK-33847: Remove the CaseWhen if elseValue is empty and other
outputs are null") {
+ assertEquivalent(
+ CaseWhen((GreaterThan('a, 1), Literal.create(null, IntegerType)) :: Nil,
Review comment:
ditto, `Seq(GreaterThan('a, 1), GreaterThan(Rand(0), 1)).foreach...`
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