uranusjr commented on PR #60166:
URL: https://github.com/apache/airflow/pull/60166#issuecomment-3722230675
Thinking about it, the deadlock isn’t really caused by the subquery, right?
Would this be good enough to resolve the issue on MySQL?
```python
if session.scalar(select(func.count()).where(DagModel.is_stale).limit(1)):
for model in models_to_check:
session.execute(
delete(model)
.where(model.dag_id.in_(select(DagModel.dag_id).where(DagModel.is_stale)))
.execution_options(synchronize_session="fetch")
)
```
This would avoid fetching in a list with unchecked size and should be safe
everywhere.
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