Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/16068#discussion_r91027951 --- Diff: sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala --- @@ -487,6 +488,52 @@ class HiveUDFSuite extends QueryTest with TestHiveSingleton with SQLTestUtils { assert(count4 == 1) sql("DROP TABLE parquet_tmp") } + + test("Hive Stateful UDF") { + withUserDefinedFunction("statefulUDF" -> true, "statelessUDF" -> true) { + sql(s"CREATE TEMPORARY FUNCTION statefulUDF AS '${classOf[StatefulUDF].getName}'") + sql(s"CREATE TEMPORARY FUNCTION statelessUDF AS '${classOf[StatelessUDF].getName}'") + withTempView("inputTable") { --- End diff -- we can simplify this test a bit: ``` val testData = spark.range(10) checkAnswer(testData.repartition(1).select("statefulUDF() as s").max($"s"), Row(10)) ... ```
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