Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/17848#discussion_r125387952
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/expressions/UserDefinedFunction.scala
---
@@ -85,8 +94,9 @@ case class UserDefinedFunction protected[sql] (
* @since 2.3.0
*/
def withName(name: String): this.type = {
- this._nameOption = Option(name)
- this
+ val udf = copyAll()
+ udf._nameOption = Option(name)
--- End diff --
@maropu We should make a copy when calling `withName`, instead of returning
this object.
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