Retrofit in real developer workflows. on retrofit: co-evolve source code and database schemas

Retrofit generates the migration scripts. Flyway runs them.

Thu, 20 Aug 2026 00:00:00 +0000

Marquez is our starting point: a real schema built by 74 Flyway migrations. We take a schema-only dump, import it into Retrofit, and seal it as the V74 baseline. That yields 469 schema operations: 30 tables, 199 columns, 181 constraints, and 46 indexes. Nothing is replayed and nothing is rewritten (Fig. 1A).

jobs.current_run_uuid already points at runs.uuid, and is indexed, but no foreign key connects the two. We add one with ON DELETE SET NULL.

Import and evolve an existing PostgreSQL database.

Tue, 14 Jul 2026 00:00:00 +0000

Retrofit starts from a database dump, a set of migration scripts, or nothing at all. This demo starts with the Chinook sample database, its 11 related tables, and populated sample data. It imports that database, rebuilds all 3,503 tracks, renames track.name to track.title, converts track.milliseconds from an integer to an interval, and renames invoice.total to invoice.amount.

The larger refactor moves five billing-address columns out of invoice and creates invoice_core and invoice_billing.