Finding Significant Differences in Flyway SQL Migration Code

This article demonstrates using PowerShell-based tokenization to compare two SQL migration files. It ignores non-functional changes like comments or formatting and pinpoints the first meaningful change in SQL logic, providing detailed feedback on its location and nature. Read more

Defusing Flyway Validation Errors using Smarter Checksum Comparisons

This article provides a scripted SQL tokenizer script that quickly verifies whether a Flyway validation error is a real cause for concern, due to retrospective metadata changes, or just the result of a developer valiantly adding formatting and documentation to improve the code. If the changes are purely cosmetic, we can safely run Flyway repair to resume normal migrations. Read more

Using ODBC in PowerShell Scripts and Callbacks

Flyway connects to database using JDBC, but when we're automating Flyway with PowerShell, we can't use JDBC directly to get access to the metadata we need to add useful reports and other functionality to Flyway's build and migration processes. This article demonstrates how to get what we need using ODBC from our PowerShell scripts, via a DSN. Read more

Code Visibility: Browsing through Flyway Migration Files

If you can convert a SQL file to HTML, then you can inspect your Flyway migration files in a browser. This is especially useful if your SQL is color-coded with the same conventions as it was in your IDE. It is even better still if your browser can allow you to scan through many files, moving from file to file with a single click. This article demonstrates how to do this with a few PowerShell scripts. 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

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

Database Branching and Merging without the Tears

Armed with a schema comparison engine and an object-level directory of the source for every recent version of the database, you'll be able to remove a lot of the uncertainty around merging database changes back into development. 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

Searching a Flyway Database

As a database gets larger, and development more complex, so it becomes increasingly necessary to be able to search for strings in the source files and the database itself. Maybe you need to find when a table first got created, when a foreign key was added, or to find out which tables lack documentation. I'll show you how to answer these sorts of questions by running simple 'wildcard' searches on your Flyway migration files, or source files, as well as more targeted searches on certain parts of your database model. Read more

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