Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5750#discussion_r29297150
--- Diff: python/pyspark/sql/functions.py ---
@@ -67,11 +73,48 @@ def _(col):
'sumDistinct': 'Aggregate function: returns the sum of distinct values
in the expression.',
}
+# math functions are found under another object therefore, they need to be
handled separately
+_math_functions = {
+ 'acos': 'Computes the cosine inverse of the given value; the returned
angle is in the range' +
+ '0.0 through pi.',
+ 'asin': 'Computes the sine inverse of the given value; the returned
angle is in the range' +
+ '-pi/2 through pi/2.',
+ 'atan': 'Computes the tangent inverse of the given value.',
+ 'atan2': 'Returns the angle theta from the conversion of rectangular
coordinates (x, y) to' +
+ 'polar coordinates (r, theta).',
+ 'cbrt': 'Computes the cube-root of the given value.',
+ 'ceil': 'Computes the ceiling of the given value.',
+ 'cos': 'Computes the cosine of the given value.',
+ 'cosh': 'Computes the hyperbolic cosine of the given value.',
+ 'exp': 'Computes the exponential of the given value.',
+ 'expm1': 'Computes the exponential of the given value minus one.',
+ 'floor': 'Computes the floor of the given value.',
+ 'hypot': 'Computes `sqrt(a^2^ + b^2^)` without intermediate overflow
or underflow.',
--- End diff --
i think u need to special case for binary columns. and add some tests for
some functions in python sql tests.
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