cloud-fan commented on a change in pull request #31500:
URL: https://github.com/apache/spark/pull/31500#discussion_r571994908
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
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@@ -1088,4 +1088,6 @@ trait ComplexTypeMergingExpression extends Expression {
* Common base trait for user-defined functions, including UDF/UDAF/UDTF of
different languages
* and Hive function wrappers.
*/
-trait UserDefinedExpression
+trait UserDefinedExpression {
+ def name: String
Review comment:
It's an internal trait, seems OK to require it.
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