Github user zhzhan commented on a diff in the pull request:
https://github.com/apache/spark/pull/16068#discussion_r91570259
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
---
@@ -487,6 +489,26 @@ 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}'")
+ val testData = spark.range(10).repartition(1)
+
+ // Expected Max(s) is 10 as statefulUDF returns the sequence number
starting from 1.
+ checkAnswer(testData.selectExpr("statefulUDF() as
s").agg(max($"s")), Row(10))
+
+ // Expected Max(s) is 5 as statefulUDF returns the sequence number
starting from 1,
+ // and the data is evenly distributed into 2 partitions.
--- End diff --
case logical.Repartition(numPartitions, shuffle, child) =>
if (shuffle) {
ShuffleExchange(RoundRobinPartitioning(numPartitions),
planLater(child)) :: Nil
} else {
execution.CoalesceExec(numPartitions, planLater(child)) :: Nil
}
case logical.RepartitionByExpression(expressions, child, nPartitions)
=>
exchange.ShuffleExchange(HashPartitioning(
expressions, nPartitions.getOrElse(numPartitions)),
planLater(child)) :: Nil
---
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