Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5750#discussion_r29306545
--- Diff: python/pyspark/sql/functions.py ---
@@ -33,17 +33,36 @@
__all__ = ['countDistinct', 'approxCountDistinct', 'udf']
-def _create_function(name, doc=""):
+def _function_obj(sc, is_math=False):
+ if not is_math:
+ return sc._jvm.functions
+ else:
+ return sc._jvm.mathfunctions
+
+
+def _create_function(name, doc="", is_math=False, binary=False):
--- End diff --
not sure if you got my previous comment. it might be easier if is_math just
takes a jvm object, rather than using an extra _function_obj
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