Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17848#discussion_r128141710
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala ---
@@ -104,21 +104,35 @@ class UDFRegistration private[sql] (functionRegistry:
FunctionRegistry) extends
val inputTypes = (1 to x).foldRight("Nil")((i, s) =>
{s"ScalaReflection.schemaFor[A$i].dataType :: $s"})
println(s"""
/**
- * Register a Scala closure of ${x} arguments as user-defined
function (UDF).
+ * Registers a Scala closure of ${x} arguments as user-defined
function (UDF).
* @tparam RT return type of UDF.
* @since 1.3.0
*/
def register[$typeTags](name: String, func: Function$x[$types]):
UserDefinedFunction = {
+ registerUDF(name, func, deterministic = true)
+ }
+
+ /**
+ * Registers a non-deterministic Scala closure of ${x} arguments
as user-defined function (UDF).
+ * @tparam RT return type of UDF.
+ * @since 2.3.0
+ */
+ def registerNonDeterministic[$typeTags](name: String, func:
Function$x[$types]): UserDefinedFunction = {
+ registerUDF(name, func, deterministic = false)
+ }
+
+ private def registerUDF[$typeTags](name: String, func:
Function$x[$types], deterministic: Boolean): UserDefinedFunction = {
--- End diff --
can we make this public?
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