Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/6616#discussion_r31695804
--- Diff: python/pyspark/sql/dataframe.py ---
@@ -509,30 +509,42 @@ def join(self, other, joinExprs=None, joinType=None):
The following performs a full outer join between ``df1`` and
``df2``.
:param other: Right side of the join
- :param joinExprs: a string for join column name, or a join
expression (Column).
- If joinExprs is a string indicating the name of the join
column,
- the column must exist on both sides, and this performs an
inner equi-join.
+ :param joinExprs: a string for join column name, a list of column
names,
--- End diff --
ok.
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