dianfu commented on code in PR #29070:
URL: https://github.com/apache/flink/pull/29070#discussion_r3965043397
##########
flink-python/pyflink/dataframe/dataframe.py:
##########
@@ -560,6 +553,111 @@ def drop_duplicates(
distinct = drop_duplicates
unique = drop_duplicates
+ # ======================== Windowing ========================
+
+ @PublicEvolving()
+ def tumble(
+ self,
+ *,
+ on: Union[str, Expression],
+ size: Union["datetime.timedelta", Expression],
+ ) -> "DataFrame":
+ """
+ Assign rows to fixed-size, non-overlapping (tumbling) windows.
+
+ Appends ``window_start``, ``window_end`` and ``window_time`` and
returns an ordinary
+ DataFrame.
+
+ :param on: An existing event-time or processing-time column.
+ :param size: Window length.
+ :return: A new DataFrame with the window columns appended.
+ :raises TypeError: If ``on`` or ``size`` has an unsupported type.
Review Comment:
Could we add some examples in the API doc for these API?
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