Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/9766#discussion_r83056607
--- Diff: python/pyspark/sql/context.py ---
@@ -202,6 +202,32 @@ def registerFunction(self, name, f,
returnType=StringType()):
"""
self.sparkSession.catalog.registerFunction(name, f, returnType)
+ @ignore_unicode_prefix
+ @since(2.1)
+ def registerJavaFunction(self, name, javaClassName, returnType=None):
+ """Register a java UDF so it can be used in SQL statements.
+
+ In addition to a name and the function itself, the return type can
be optionally specified.
+ When the return type is not given it would infer the returnType
via reflection.
--- End diff --
nit: its a little odd to mix `return type` with `returnType`. Perhaps,
"When the return type is not specified we attempt to infer it using reflection"
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