Hi, looking into the DB schema there is almost no referral integrity enforced at the database level. Many foreign key constraints between dag, dag_run, task_instance, xcom, dag_pickle, log, etc would make sense IMO.
Is there a particular reason why that's not implemented? Introducing it now will be hard, probably any real-world setup has some violations. But I'm still in favor of this additional safety net. Kind Regards, Stefan
