auroflow commented on code in PR #28937:
URL: https://github.com/apache/flink/pull/28937#discussion_r3765767602
##########
flink-python/pyflink/dataframe/dataframe.py:
##########
@@ -348,3 +433,75 @@ def collect(self) -> List[Row]:
"""
with self._table.execute().collect() as rows:
return list(rows)
+
+
+@PublicEvolving()
+class GroupedDataFrame:
+ """
+ A DataFrame grouped by one or more keys and ready for aggregation.
+
+ Instances are created by :meth:`DataFrame.group_by`.
+
+ .. versionadded:: 2.4.0
+ """
+
+ def __init__(self, dataframe: DataFrame, grouping_keys: List[Expression]):
+ self._dataframe = dataframe
+ self._grouping_keys = grouping_keys
Review Comment:
This seems to be a bug in the Table API planner, which affects Table API for
Python and Java as well. I have opened a separate PR for this:
[FLINK-40344](https://issues.apache.org/jira/projects/FLINK/issues/FLINK-40344)
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