tau-mask opened a new issue #18314:
URL: https://github.com/apache/airflow/issues/18314
### Apache Airflow version
2.1.3 (latest released)
### Operating System
Ubuntu 20.04
### Versions of Apache Airflow Providers
_No response_
### Deployment
Virtualenv installation
### Deployment details
_No response_
### What happened
After upgrading from v2.1.2 to v2.1.3, the scheduler won't start because of
a missing column `queued_at` in the table `airflow_db.dag_run`:
```
sqlalchemy.exc.ProgrammingError: (mysql.connector.errors.ProgrammingError)
1054 (42S22): Unknown column 'queued_at' in 'field list'
[SQL: INSERT INTO airflow_db.dag_run (dag_id, queued_at, execution_date,
start_date, end_date, state, run_id, creating_job_id, external_trigger,
run_type, conf, last_scheduling_decision, dag_hash) VALUES (%(dag_id)s,
%(queued_at)s, %(execution_date)s, %(start_date)s, %(end_date)s, %(state)s,
%(run_id)s, %(creating_job_id)s, %(external_trigger)s, %(run_type)s, %(conf)s,
%(last_scheduling_decision)s, %(dag_hash)s)]
[parameters: {'dag_id': 'perforce_submits_tags_dev', 'queued_at':
datetime.datetime(2021, 9, 17, 3, 49, 21, 590549), 'execution_date':
datetime.datetime(2021, 9, 16, 23, 5), 'start_date': None, 'end_date': None,
'state': <TaskInstanceState.QUEUED: 'queued'>, 'run_id':
'scheduled__2021-09-16T23:05:00+00:00', 'creating_job_id': 64538,
'external_trigger': 0, 'run_type': <DagRunType.SCHEDULED: 'scheduled'>, 'conf':
b'\x80\x05}\x94.', 'last_scheduling_decision': None, 'dag_hash':
'7a12e79b01b2b946cf6ad9bca1eec775'}]
```
### What you expected to happen
I expected the scheduler to start. But beyond that, I think that adding a
column to the database constitutes a minor level change, not a patch level
change (i.e. 2.2.x rather than 2.1.x). I also have no idea how to fix it
besides wiping out the database and recreating it from scratch, or adding that
column myself manually. If there's a way to do that properly from the command
line, I couldn't find the documentation.
### How to reproduce
_No response_
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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