Done. Thank you. I rushed and forgot about the ConnectionContext I get in self.config. 

However, I'll chose to not use the transaction_executor_class. I think it's kinda overkill. First of all, I'm not using transactions at all here and don't want to either. Secondly, I think the API is a bit cryptic. Perhaps I think that simply because I didn't write it myself. But on a gut level it's not obvious what it does whereas this is plain English to me:
```python
        cursor = connection.cursor()
        cursor.execute("""
            SELECT COUNT(*) FROM crontabber
        """)
        count, = cursor.fetchone()
```