2 docs tagged with "schema policies"

Destructive Change Policy: Prevent Accidental Data Loss with Deprecation Workflows

Block accidental DROP TABLE and DROP COLUMN in CI with the Atlas destructive analyzer. Run a real deprecation workflow with allowlist patterns. Strip drops from the diff entirely on high-stakes environments.

Safe NOT NULL Migrations on PostgreSQL: Avoid Aborted Deploys and Table Locks

Add NOT NULL constraints on PostgreSQL without aborting migrations or locking tables. Atlas's not_null diff policy emits an MF104 pre-migration check and a lock-safe NOT VALID plan validated under a weaker lock.