Tracking Down Object Changes in Flyway Migration Files

The goal of this article is to help Flyway developers search their migration files to pinpoint exactly where a specific database object, like a table, view, or procedure, was created or changed. It introduces a PowerShell script that scans files in version order and returns the relevant DDL statements with surrounding context. Read more

Using Bash with Flyway

If you're using a Linux-based operating system, Bash is the obvious choice of scripting language for Flyway. This article demos the basics of dealing with credentials in team-based database development, when using 'traditional' flyway.conf files, and how to save and parse the JSON output of Flyway commands, for example to retrieve the current schema version. It provides a full automation example that will allow a team to maintain several copies of a database, one per development branch, from a Flyway project. Read more

Using Database Models and Flyway for Automating Routine Development tasks

Database models have all sorts of useful applications during Flyway development to help us automate those repetitive development tasks that otherwise slow down delivery. This article shows how models can help us automate mundane tasks such as generating a build script for any version of a database or deleting the data from every table. Read more

Tracking Development Changes using Flyway and Database Models

A database model is a standard document that represents the logical design and structure of a database. If we save a model each time Flyway creates a new version of the database, then we can find out what's in each version, and get an overview of how that structure changed between any two versions. This has all sorts of uses in team-based database development work. Read more

Infrequently Asked Questions About Flyway

You can have Flyway up and running in minutes if you're a solo developer managing a single database. However, as you seek to 'scale up' Flyway to accommodate more complex database systems, team-based development, and stricter quality controls, you'll need to tackle some knottier questions. Without adequate answers, tasks such as multi-database management, automation and workflow, and Continuous Integration will be difficult. Hopefully, this article will help. Read more

Maintaining Variants of a Database using Flyway Locations

In this article, I'll explain why we often need to maintain variants of the same database, at a particular version. I'll demonstrate how useful variants can be for creating slightly modified installations of a database, for special uses, or even for the simple task of provisioning multiple copies of the same version. In doing so, I'll show how we can use Flyway locations to overcome problems that would otherwise require complicated solutions. Flyway can make the whole matter of maintaining database variants very easy. Read more

Searching Flyway Migration Files using Grep and Regex

This article demonstrates a cross-RDBMS way of searching through a set of SQL migration files, in the right order, to get a narrative summary of what changes were made, or will be made, to one or more of the tables or routines within each migration file. Getting these summary reports, even from a set of SQL migrations, isn't difficult, but having a few examples makes it a lot quicker to get started. Read more

Flyway for SQL Server Data Tools Users

If you are using SSDT for authoring, building, debugging, and publishing a database project, how do you change to, or preferably migrate towards, a Flyway-based database development? Flyway doesn't need to replace any code part of SSDT, but if allowed to manage every release candidate, it does allow for much cleaner branching, merging, and deployments. Read more

Flyway and SSDT: Merging Work from a Branch

In an SSDT-Flyway hybrid development, the required database changes may be delivered as a DACPAC, but we get far more control over merge operations and deployments if they are done using Flyway migrations. This article demonstrates how to automate as much as possible of the work required to extract a Flyway-compatible migration script from a DACPAC. Read more

Flyway and SSDT: Extracting a DACPAC from a Flyway-managed Database

When you are integrating Flyway into an existing SQL Server SSDT development, you don't necessarily have to change everything at once. The development team might continue to use the SSDT tools, but Flyway will soon take over the deployments. This means that any automated processes will need to be able to handle both DACPACs and Flyway migration scripts with equal grace. In this article, I'll demonstrate how to automatically extract a versioned DACPAC from each new Flyway version of a database. Read more

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