Lee-W commented on code in PR #67537:
URL: https://github.com/apache/airflow/pull/67537#discussion_r3411733985


##########
airflow-core/src/airflow/timetables/base.py:
##########
@@ -258,6 +258,22 @@ def get_partition_mapper(self, *, name: str = "", uri: str 
= "") -> PartitionMap
         )
         raise NotImplementedError(msg)
 
+    def iter_partition_dagrun_infos(
+        self,
+        *,
+        earliest_date: datetime.date,
+        latest_date: datetime.date,
+    ) -> Iterable[DagRunInfo]:
+        """
+        Yield one DagRunInfo per partition for calendar days in 
``[earliest_date, latest_date]`` (both inclusive).
+
+        Only called for partitioned timetables (``partitioned is True``). The 
default
+        implementation raises :exc:`NotImplementedError`; timetables that set
+        ``partitioned = True`` must override this.
+        """
+        msg = f"{type(self).__name__} is partitioned but does not implement 
iter_partition_dagrun_infos."
+        raise NotImplementedError(msg)

Review Comment:
   yep, non-partitioned timetables now get a "... is not partitioned" msg



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