ashb commented on code in PR #22917:
URL: https://github.com/apache/airflow/pull/22917#discussion_r848447538
##########
airflow/models/serialized_dag.py:
##########
@@ -220,6 +220,36 @@ def remove_dag(cls, dag_id: str, session: Session = None):
"""
session.execute(cls.__table__.delete().where(cls.dag_id == dag_id))
+ @classmethod
+ @provide_session
+ def remove_unknown_dags_in_dag_file(
+ cls, active_dag_ids: List[str], dag_file_path: str, session=None
+ ) -> List[str]:
+ """
+ Deletes serialized_dags whose dag_ids are not in the active_dag_ids
for a given dag_file_path
+
+ :return: a list of inactive dag ids
+ :rtype: list[str]
+ """
+ file_path_hash = DagCode.dag_fileloc_hash(dag_file_path)
+ # there is a db index on fileloc_hash
+ rows = session.query(cls.dag_id).filter(cls.fileloc_hash ==
file_path_hash).all()
+ dag_ids_from_db = [i[0] for i in rows]
+
+ dag_ids_to_remove = [dag_id for dag_id in dag_ids_from_db if dag_id
not in active_dag_ids]
Review Comment:
The index is non-unique as any kind of hashing is going to have _some_ risk
of collision.
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