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Diffstat (limited to 'python/pyspark/sql/dataframe.py')
| -rw-r--r-- | python/pyspark/sql/dataframe.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py index bb6df22682..a24512f53c 100644 --- a/python/pyspark/sql/dataframe.py +++ b/python/pyspark/sql/dataframe.py @@ -1384,7 +1384,8 @@ class DataFrame(object): Space-efficient Online Computation of Quantile Summaries]] by Greenwald and Khanna. - Note that rows containing any null values will be removed before calculation. + Note that null values will be ignored in numerical columns before calculation. + For columns only containing null values, an empty list is returned. :param col: str, list. Can be a single column name, or a list of names for multiple columns. |