checking-migration-safety

To check if a database schema change is reversible, you validate migration roundtrip capability and ensure rollback procedures exist. This confirms schema changes can be safely undone without losing data integrity.

Expand-contract schema change is a migration pattern that separates deployment into expansion and contraction phases. You need it to maintain backward compatibility and validate that old application logic functions on the new schema.

You validate backward compatibility by checking that existing application logic still functions correctly on the new schema. This ensures old code operates without breaking during the migration process.

Yes, you can run reversible database migrations without breaking applications by validating compatibility beforehand. This process proves migration roundtrip capability and ensures data integrity checks pass before deployment.

Checking migration safety requires the ability to perform expand-contract schema changes. If your environment cannot run reversible migrations or execute roundtrip validations, the safety checks cannot be fully verified.