vatsrahul1001 opened a new issue, #63444:
URL: https://github.com/apache/airflow/issues/63444
### Apache Airflow version
3.1.8
### If "Other Airflow 3 version" selected, which one?
_No response_
### What happened?
The downgrade() in 0096_3_2_0_remove_team_id.py adds back the id column to
the team table as NOT NULL without providing a server_default or populating the
column first.
### What you think should happen instead?
_No response_
### How to reproduce
1. breeze start-airflow --executor CeleryExecutor --backend postgres
--load-example-dags --use-airflow-version 3.1.8
2. Upgrade to 3.2.0: breeze start-airflow --executor CeleryExecutor
--backend postgres --load-example-dags
3. Insert data in team table
4. airflow db downgrade -n 3.1.8 in tmux shell
```
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/python/bin/airflow", line 10, in <module>
sys.exit(main())
File "/opt/airflow/airflow-core/src/airflow/__main__.py", line 55, in main
args.func(args)
File "/opt/airflow/airflow-core/src/airflow/cli/cli_config.py", line 49,
in command
return func(*args, **kwargs)
File "/opt/airflow/airflow-core/src/airflow/utils/cli.py", line 113, in
wrapper
return f(*args, **kwargs)
File
"/opt/airflow/airflow-core/src/airflow/utils/providers_configuration_loader.py",
line 54, in wrapped_function
return func(*args, **kwargs)
File "/opt/airflow/airflow-core/src/airflow/cli/commands/db_command.py",
line 213, in downgrade
run_db_downgrade_command(args, db.downgrade, _REVISION_HEADS_MAP)
File "/opt/airflow/airflow-core/src/airflow/cli/commands/db_command.py",
line 188, in run_db_downgrade_command
command(to_revision=to_revision, from_revision=from_revision,
show_sql_only=args.show_sql_only)
File "/opt/airflow/airflow-core/src/airflow/utils/session.py", line 100,
in wrapper
return func(*args, session=session, **kwargs) # type: ignore[arg-type]
File "/opt/airflow/airflow-core/src/airflow/utils/db.py", line 1371, in
downgrade
command.downgrade(config, revision=to_revision, sql=show_sql_only)
File "/usr/python/lib/python3.10/site-packages/alembic/command.py", line
530, in downgrade
script.run_env()
File "/usr/python/lib/python3.10/site-packages/alembic/script/base.py",
line 545, in run_env
util.load_python_file(self.dir, "env.py")
File "/usr/python/lib/python3.10/site-packages/alembic/util/pyfiles.py",
line 116, in load_python_file
module = load_module_py(module_id, path)
File "/usr/python/lib/python3.10/site-packages/alembic/util/pyfiles.py",
line 136, in load_module_py
spec.loader.exec_module(module) # type: ignore
File "<frozen importlib._bootstrap_external>", line 883, in exec_module
File "<frozen importlib._bootstrap>", line 241, in
_call_with_frames_removed
File "/opt/airflow/airflow-core/src/airflow/migrations/env.py", line 138,
in <module>
run_migrations_online()
File "/opt/airflow/airflow-core/src/airflow/migrations/env.py", line 132,
in run_migrations_online
context.run_migrations()
File "<string>", line 8, in run_migrations
File
"/usr/python/lib/python3.10/site-packages/alembic/runtime/environment.py", line
969, in run_migrations
self.get_context().run_migrations(**kw)
File
"/usr/python/lib/python3.10/site-packages/alembic/runtime/migration.py", line
626, in run_migrations
step.migration_fn(**kw)
File
"/opt/airflow/airflow-core/src/airflow/migrations/versions/0096_3_2_0_remove_team_id.py",
line 107, in downgrade
with op.batch_alter_table("team") as batch_op:
File "/usr/python/lib/python3.10/contextlib.py", line 142, in __exit__
next(self.gen)
File
"/usr/python/lib/python3.10/site-packages/alembic/operations/base.py", line
408, in batch_alter_table
impl.flush()
File
"/usr/python/lib/python3.10/site-packages/alembic/operations/batch.py", line
115, in flush
fn(*arg, **kw)
File "/usr/python/lib/python3.10/site-packages/alembic/ddl/impl.py", line
392, in add_column
self._exec(
File "/usr/python/lib/python3.10/site-packages/alembic/ddl/impl.py", line
256, in _exec
return conn.execute(construct, params)
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/base.py",
line 1419, in execute
return meth(
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/sql/ddl.py",
line 187, in _execute_on_connection
return connection._execute_ddl(
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/base.py",
line 1530, in _execute_ddl
ret = self._execute_context(
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/base.py",
line 1846, in _execute_context
return self._exec_single_context(
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/base.py",
line 1986, in _exec_single_context
self._handle_dbapi_exception(
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/base.py",
line 2363, in _handle_dbapi_exception
raise sqlalchemy_exception.with_traceback(exc_info[2]) from e
File "/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/base.py",
line 1967, in _exec_single_context
self.dialect.do_execute(
File
"/usr/python/lib/python3.10/site-packages/sqlalchemy/engine/default.py", line
952, in do_execute
cursor.execute(statement, parameters)
sqlalchemy.exc.IntegrityError: (psycopg2.errors.NotNullViolation) column
"id" of relation "team" contains null values
[SQL: ALTER TABLE team ADD COLUMN id VARCHAR(36) NOT NULL]
(Background on this error at: https://sqlalche.me/e/20/gkpj)
[Breeze:3.10.20] root@f9871abfb8d0:/opt/airflow$
```
### Operating System
Mac
### Versions of Apache Airflow Providers
_No response_
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [x] 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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