Flyway’s Repair Command Explained Simply

The Repair command allows Flyway migrations to recommence on a database, following one or more validation errors. It modifies various details recorded in the schema history table, for applied migrations, to make them consistent with the data and metadata of the current set of Flyway migration files. This article explains what problems Repair can fix and how to run it safely, and a few alternative strategies. Read more

Flyway’s Validate Command Explained Simply

The Validate command aims to ensure that Flyway can reliably reproduce an existing version of a database from the source migration scripts by warning you if files are retrospectively added, removed or altered that would prevent it from doing so. Validation errors are Flyway's warning that "the source for this version has changed". Read more

Flyway’s Clean Command Explained Simply

The Clean command resets a database to its initial state, before any Flyway migrations were applied. In other words, it empties the database. This can be useful for any development task that requires that you recreate the database structure, or for tearing down a test harness. It also allows you to try out experiments and alternative strategies within an isolated feature branch, and then reverse out of them. Read more

Flyway’s Baseline Migrations Explained Simply

A Flyway Baseline migration script is a single script with a B prefix that will migrate an empty database, or one that Flyway has 'cleaned', to the version specified in the file name. It is useful both for consolidating a long, often complex chain of historical migrations, and for capturing the current production version of a database, as the starting point for developing subsequent migrations. Read more

Flyway’s Baseline Command Explained Simply

The Baseline command is intended to make it easy to turn any preexisting production database into a Flyway database so that, subsequently, versioned migrations can then be applied to it, bringing greater stability and predictability to database deployments. Read more

The Flyway Info Command Explained Simply

If you need the current version of your Flyway database, and a history of the changes that were applied to build that version, then the info command is the place to go. It allows you to review applied and pending migrations, track migration status, and troubleshoot any issues that may have occurred during the migration process. Read more

The Flyway Migrate Command Explained Simply

The 'Migrate' command automates the process of applying the database schema changes that are defined in migration scripts, while Flyway tracks the version of every copy of the database. This makes it much easier to maintain consistency across different database environments, and so facilitates continuous integration, continuous deployment, and database version control practices. Read more

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