Fokko commented on a change in pull request #26644: [SPARK-30004][SQL] Allow
merge UserDefinedType into a native DataType
URL: https://github.com/apache/spark/pull/26644#discussion_r350213508
##########
File path: sql/catalyst/src/test/scala/org/apache/spark/sql/types/TestUDT.scala
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@@ -58,4 +63,22 @@ object TestUDT {
override def equals(other: Any): Boolean =
other.isInstanceOf[MyDenseVectorUDT]
}
+
+ private[sql] class MyXMLGregorianCalendarUDT extends
UserDefinedType[XMLGregorianCalendar] {
Review comment:
No, this isn't possible since we need to override the `jvalue` to the native
DataType type. Otherwise, it will be caught by:
https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala#L592
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