Github user 0x0FFF commented on a diff in the pull request:
https://github.com/apache/spark/pull/8658#discussion_r39189353
--- Diff: python/pyspark/sql/column.py ---
@@ -151,6 +162,8 @@ def __init__(self, jc):
__rdiv__ = _reverse_op("divide")
__rtruediv__ = _reverse_op("divide")
__rmod__ = _reverse_op("mod")
+ __pow__ = _bin_func_op("pow")
--- End diff --
@davies, `pow` function in `pyspark.sql.functions` is created with function
`_create_binary_mathfunction` which uses `Column` internally, thus it cannot be
simply imported from `pyspark.sql.fuction`
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