cloud-fan commented on code in PR #36408:
URL: https://github.com/apache/spark/pull/36408#discussion_r867743145
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala:
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@@ -2342,3 +2342,29 @@ case class UpCast(child: Expression, target:
AbstractDataType, walkedTypePath: S
override protected def withNewChildInternal(newChild: Expression): UpCast =
copy(child = newChild)
}
+
+/**
+ * Unwrap UDT data type column into its underlying struct type
+ */
+case class UnwrapUDT(child: Expression) extends UnaryExpression with
NonSQLExpression {
Review Comment:
can we move it to a new file?
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