peter-toth commented on a change in pull request #31955:
URL: https://github.com/apache/spark/pull/31955#discussion_r601199228
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File path: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
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@@ -2755,6 +2755,20 @@ class DataFrameSuite extends QueryTest
)
checkAnswer(test.select($"best_name.name"), Row("bob") :: Row("bob") ::
Row("sam") :: Nil)
}
+
+ test("SPARK-34829: Typed ScalaUDF result conversion works") {
+ val reverse = udf((s: String) => s.reverse)
+ val df = Seq(Array("abc", "def")).toDF("array")
+ val test = df.select(transform(col("array"), s => reverse(s)))
+ checkAnswer(test, Row(Array("cba", "fed")) :: Nil)
Review comment:
I don't think there is a codegen path for `ArrayTransform`. It can call
`ScalaUDF.eval()` on its interpreted path only
(https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala#L282).
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