[GitHub] [airflow] uranusjr commented on a change in pull request #22679: Expand mapped tasks at DagRun.Veriy_integrity

[GitBox <gi...@apache.org>]

uranusjr commented on a change in pull request #22679:
URL: https://github.com/apache/airflow/pull/22679#discussion_r840504427



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File path: airflow/models/mappedoperator.py
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@@ -511,6 +510,16 @@ def _get_map_lengths(self, run_id: str, *, session: Session) -> Dict[str, int]:
 
         return map_lengths
 
+    def get_indexes_to_map(self, run_id: str, *, session: Session) -> range:
+        total = 0
+        try:
+            values = self._get_map_lengths(run_id, session=session).values()

Review comment:
       We can only ever be able to expand tasks with literal-only kwargs at this point, so we probably don’t need to call `_get_map_lengths` (which is expensive and accesses db), but instead rely solely on the task kwargs to get this length.




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