Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/9568#discussion_r44273796
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/expressions/udaf.scala ---
@@ -129,6 +129,13 @@ abstract class UserDefinedAggregateFunction extends
Serializable {
isDistinct = true)
Column(aggregateExpression)
}
+
+ /**
+ * The name of the UDAF. This is currently the simple name of class.
This can create an
+ * [[java.lang.InternalError]] if the UDAF class was created in the
REPL; override this method
+ * in these cases.
+ */
+ def name: String = getClass.getSimpleName
--- End diff --
I am not catching a ```java.lang.InternalError``` here, because I think
these shouldn't be caught at all (the error could have different cause). We
enable the use to redefine the name to work arround this problem.
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