migration-strategies

To safely add a non-nullable column without downtime, you must follow a multi-step migration pattern: first add the column as nullable, backfill the data, update the application to use it, and finally enforce the non-nullable constraint. This strategy prevents application errors and database locks.

Yes, this database migration guidance covers workflow best practices for both Prisma and Drizzle ORMs. It provides specific development and production commands, safe schema evolution patterns, and zero-downtime checklists tailored to these frameworks.

The best way to backfill data during a database migration is to use safe data transformation patterns that operate in batches. This skill provides strategies for backfilling data safely without locking tables or causing downtime during schema evolution.

Creating indexes without locking requires using specific safe migration patterns outlined in this guidance. It details strategies for adding indexes to critical tables without downtime, ensuring continuous application availability during schema changes.

Rollback procedures for failed database schema changes are included as a core component of this migration guidance. It provides strategies to safely reverse column alterations, index creations, and data backfills to restore your database to its previous stable state.

You need a zero-downtime database migration checklist when deploying schema changes to critical production tables. This skill includes checklists and CI/CD integration examples to verify that column alterations, data backfills, and index creations proceed safely.