cloud-fan commented on a change in pull request #30852:
URL: https://github.com/apache/spark/pull/30852#discussion_r547719655
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/PushFoldableIntoBranchesSuite.scala
##########
@@ -258,4 +258,22 @@ class PushFoldableIntoBranchesSuite
EqualTo(CaseWhen(Seq((a, Literal(1)), (c, Literal(2))),
None).cast(StringType), Literal("4")),
CaseWhen(Seq((a, FalseLiteral), (c, FalseLiteral)), None))
}
+
+ test("SPARK-33847: Remove the CaseWhen if elseValue is empty and other
outputs are null") {
+ assertEquivalent(
Review comment:
nit: to make the test more readable
```
Seq(a, LessThan(Rand(1), Literal(0.5)).foreach { condition =>
assertEquivalent(EqualTo(CaseWhen(Seq((condition, ...
}
```
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