Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18813#discussion_r131795057
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
---
@@ -829,7 +829,7 @@ trait ScalaReflection {
* synthetic classes, emulating behaviour in Java bytecode.
*/
def getClassNameFromType(tpe: `Type`): String = {
- tpe.erasure.typeSymbol.asClass.fullName
+ tpe.dealias.erasure.typeSymbol.asClass.fullName
--- End diff --
This is needed.
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