Ngone51 commented on a change in pull request #28645:
URL: https://github.com/apache/spark/pull/28645#discussion_r431147291
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File path: sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
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@@ -581,4 +581,40 @@ class UDFSuite extends QueryTest with SharedSparkSession {
.toDF("col1", "col2")
checkAnswer(df.select(myUdf(Column("col1"), Column("col2"))), Row(2020) ::
Nil)
}
+
+ test("case class as element type of Seq/Array") {
Review comment:
There's implementation difference between `udf` and `Dataset.map`. So
for the second case you're mentioned, it only work in `Dataset.map` but fail
in `udf`.
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