3 docs tagged with "pre-migration checks"

Pre-migration checks allow you to run assertions on the target database before applying migrations, reducing the risk of migration failures.

Which ALTER statements rewrite data on a large warehouse table, which ones are metadata-only, and how to block a destructive change with Atlas lint and a pre-migration check.

Learn how to define and run pre-migration checks in Atlas to validate schema conditions before applying migrations, ensuring safe database changes.