Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/21021#discussion_r182992892
--- Diff: python/pyspark/sql/functions.py ---
@@ -2154,10 +2154,13 @@ def array_max(col):
def sort_array(col, asc=True):
"""
Collection function: sorts the input array in ascending or descending
order according
- to the natural ordering of the array elements.
+ to the natural ordering of the array elements. Null elements will be
placed at the beginning
+ of the returned array in ascending order or at the end of the returned
array in descending
+ order.
:param col: name of column or expression
+ >>> from pyspark.sql.functions import sort_array
--- End diff --
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