Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/11347#discussion_r54308425
--- Diff: python/pyspark/sql/dataframe.py ---
@@ -257,53 +264,85 @@ def limit(self, num):
@ignore_unicode_prefix
@since(1.3)
def take(self, num):
- """Returns the first ``num`` rows as a :class:`list` of
:class:`Row`.
+ """Returns the first ``num`` records as a :class:`list`.
>>> df.take(2)
[Row(age=2, name=u'Alice'), Row(age=5, name=u'Bob')]
"""
- with SCCallSiteSync(self._sc) as css:
- port =
self._sc._jvm.org.apache.spark.sql.execution.python.EvaluatePython.takeAndServe(
- self._jdf, num)
- return list(_load_from_socket(port,
BatchedSerializer(PickleSerializer())))
+ return self.limit(num).collect()
--- End diff --
This requires can all the partitions, see SPARK-10731
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