Using Windows Security and Encryption with Flyway

This article describes a simple technique that will allow you to use Flyway securely, even in cases where more than just the login credentials need to be protected. It uses a PowerShell technique that converts an encrypted Flyway configuration file into an array of parameters that Flyway can read just as if you were typing them in. 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

Finding External References in Database Deployments

This article outlines the syntax of the three and four dot references that usually denote external database references, demonstrates how to find them either from a live database or by using a text search of a script, and explains some of the complicating factors that can lead to 'false positives'. Read more

Piping, Filtering and Using Flyway Output in PowerShell

Flyway's output is often overwhelmed with verbose messages, most of which we can ignore but some of which provide vital warnings about failed compilations, or useful details about what a migration or callback did. I'll show how to use some pipeline-aware PowerShell functions to filter out and save the bits we want and pass the results along in a form that is useful to the next process in the pipeline. Read more

Recording What’s Changed when Running Oracle Migrations with Flyway

This article uses Flyway and a PowerShell framework to generate a simple JSON model for each new version of an Oracle database, and then compares models to get a high-level 'narrative' of which tables, views or procedures were changed by each Flyway migration. Read more

Complex Production Database Deployments and Flyway

This article explains how, by use of schemas and stub interfaces, we can use Flyway to manage the main development work smoothly alongside any changes or additions required to maintain production-only code. It also demonstrates how this mechanism enables Flyway to manage a 'mock' or 'dummy' variant of a production schema, in development, so that the team can still develop and test code that, when deployed, will access production-only features. Read more

Undoing Actions on Groups of Database Tables

During development you'll occasionally need an undo script that drops a group of tables, or you might need to truncate a group of tables and then insert fresh data in order to run some tests. Unless you perform the required actions in the correct dependency order, you'll be tripped up by foreign key constraint violations. This article provides a SQL function that returns the list of tables in the correct dependency order. Read more

Getting Started with Flyway Migrations on Oracle

A quick demonstration of using Flyway with Oracle, for those of a nervous disposition. We'll use Flyway to run some migrations on an Oracle Autonomous Database, building the initial version of the database then filling it with development data. Read more

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