![]() ![]() The filename of each script provides the information about the script and what it does. Whenever developers need to alter a database in any way, either changing the metadata (schema) or its data, they create a SQL script, whose filename follows the Flyway naming convention, and place it in the database directory.Įach migration script takes a database from one version to the next, and similarly an ‘undo’ script takes back it to the previous version. If, for example, a hotfix is applied to a production system in response to a production fault, it can be easily deployed retrospectively to other database environments.įlyway executes SQL migration scripts in sequence to build a database to the version you want. It gives a history of all the changes made, and so can show whether a particular script has been applied. As well as its obvious use of setting up a database to a particular version, it allows a team to determine the state of a copy of a database in any environment. It provides a system that is reliable and easy to comprehend. ![]() If your database development is currently rather haphazard then Flyway, together with a good source management and control system, is a well-proven way to introduce structure. In the ‘Flyway Teams’ edition, one can even execute scripting files such as PowerShell. The application has been written to be as configurable as possible, allowing the execution of Java files at various points in the process. The developers’ community has many other plugins. There are integrations available for several build systems including Maven, Gradle, Ant and SBT, Spring Boot, Play, Jenkins, XL Deploy and NPM. It is available for Java, Android, Windows, macOS, Linux and Docker. ![]() It now supports 18 different types of databases. Flyway’s great strength is that it supports many different databases, application build systems and platforms. It allows these databases to be tightly integrated with the deployment process for the application. You can start to get a useful service from Flyway very quickly without needing to immerse yourself in the forest of options and actions.įlyway was designed to provide an easy way to integrate simple databases into the build tools for Java-based applications, requiring only plain SQL code. It can also integrate with a range of existing development tools, without disrupting established development systems. In a special table within the target database, it records a history of what it has done to build the database.Īlthough Flyway has special features for managing migration files, it is versatile enough to support a wide variety of techniques used by teams to design and build databases. ![]() By running scripts within a transaction, it can rollback a migration if there is an error. When Flyway migrates a database to the version you need, it looks for migrations that must be applied, sorts them, and applies them in order, directly against the database. It works as a database-independent library for tracking, managing and applying database changes. It is a tool that enables developers without specialized database skills to integrate SQL migration scripts into a database application, to guarantee that the database and application are always at compatible versions. He is a regular contributor to Simple Talk and SQLServerCentral.įlyway builds databases from scripts. Phil Factor (real name withheld to protect the guilty), aka Database Mole, has 30 years of experience with database-intensive applications.ĭespite having once been shouted at by a furious Bill Gates at an exhibition in the early 1980s, he has remained resolutely anonymous throughout his career. ![]()
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