Reviewing SQL Migration Files Before a Flyway Migration

Your finger is hovering over the 'enter' key to set off the Flyway "migrate" command, but you hesitate. There is a large stack of migration files for this project: don't all these files need to be checked first? Yes, they do, but how? This article demonstrates how, once armed with the file path locations of all the scripts, you can use PowerShell to search them for various purposes such to review them for potentially disruptive changes, or run code quality checks, or to verify documentation standards. Read more

Debugging Flyway Callbacks and Migrations that Use Placeholders

Placeholders come in very handy in Flyway, but troubleshooting the SQL migration and callback scripts that use them can be tricky. This articles demonstrates how to develop, test and debug these scripts in a tool designed for these tasks, such as SSMS, leaving Flyway to do what it's designed for, which is running the scripts. Read more

Testing a Flyway Database Migration

Often, we want to test the new version of a database, produced by a Flyway migration, before committing the new migration file, or to test the same migration run on a number of different databases. This article demonstrates how to do it, by generating and using JSON parameter files to run a series of Flyway actions on any number of databases, on any number of servers. Read more

Secrets of Flyway Teams Undo

Flyway Teams has an Undo facility that enables you to roll back one or more migrations. This article demonstrates how it works and explains how Undo migrations make testing migration scripts easier and branch-based development simpler. Read more

Dealing with Failed SQL Migrations in MariaDB or MySQL

This article explains the fastest ways to restore the previous version of the database, to recover from a failed Flyway migration that leaves the database in an indeterminate state, and then how to adapt your database development process to avoid these problems. Read more

Test-Driven Development for Flyway Using Transactions

When you are using Flyway, you can easily adopt test-driven development practices that will allow you to test your database migration script, to make sure it works exactly as you intended, before you even let Flyway execute it. Read more

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