Github user holdenk commented on a diff in the pull request:
https://github.com/apache/spark/pull/9766#discussion_r73413872
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala ---
@@ -412,6 +419,63 @@ class UDFRegistration private[sql] (functionRegistry:
FunctionRegistry) extends
//////////////////////////////////////////////////////////////////////////////////////////////
/**
+ * Register a Java UDF class
+ * @param name
+ * @param className
+ * @param returnType
+ */
+ def registerJava(name: String, className: String, returnType: DataType):
Unit = {
--- End diff --
I don't know if we want to expose this API for general use - maybe make it
private so that it can only be called from Python? And maybe update the
scaladoc to something like "Register a Java UDF class using reflection - for
use from Python".
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