guan404ming commented on PR #49002:
URL: https://github.com/apache/airflow/pull/49002#issuecomment-2854389966

   I've added a field named `test` in `dag` and tried locally with  breeze 
shell which work well to detect the change.
   ```bash
   $ breeze shell "cd airflow-core/src/airflow && alembic check"
   
   [2025-05-06T12:23:10.917+0000] {migration.py:207} INFO - Context impl 
SQLiteImpl.
   [2025-05-06T12:23:10.919+0000] {migration.py:210} INFO - Will assume 
non-transactional DDL.
   [2025-05-06T12:23:11.124+0000] {compare.py:400} INFO - Detected added column 
'dag.test_field'
   [2025-05-06T12:23:11.158+0000] {messaging.py:71} ERROR - New upgrade 
operations detected: [('add_column', None, 'dag', Column('test_field', 
String(length=2000), table=<dag>))]
     FAILED: New upgrade operations detected: [('add_column', None, 'dag', 
Column('test_field', String(length=2000),
     table=<dag>))]
   Error 255 returned
   ```


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