Github user dilipbiswal commented on a diff in the pull request:
https://github.com/apache/spark/pull/10156#discussion_r48292189
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
---
@@ -91,7 +91,9 @@ trait CaseWhenLike extends Expression {
// both then and else expressions should be considered.
def valueTypes: Seq[DataType] = (thenList ++ elseValue).map(_.dataType)
- def valueTypesEqual: Boolean = valueTypes.distinct.size == 1
+ def valueTypesEqual: Boolean = valueTypes.size <= 1 ||
valueTypes.sliding(2, 1).forall {
+ case Seq(dt1, dt2) => DataType.equalsIgnoreNullability(dt1, dt2)
--- End diff --
@yhuai Hi Yin, Thanks !! I have changed it to use sameType.
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