Database migration tool flyway vs liquibase (I)

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I believe there is no need to describe why the use of database migration tools is critical to modern applications that use relational database engines . I just want to say , They can make our life easier , And help us automate complex and repetitive processes . Through this article , I will review the two most common open source migration tools ,Flyway and Liquibase The similarities and differences between them provide some further insights .

Tool description

First, a quick description of these two tools . Two of the most popular migration tools ,Flyway and Liquibase, Provides version control for databases .Flyway Use SQL or Java To define a change . by comparison ,Liquibase Provided by SQL、XML、YAML and JSON Flexibility in formatting changes .

Flyway Detailed description of

Its creator is a company named Redgate The company , It is described as an open source database migration tool , It prefers simplicity and convention to configuration .

Up to now , It supports most of the database engines currently in use , Such as Postgres、Oracle、SQL Server、DB2、H2、MariaDB And many other databases . It also supports some cloud based database services , Amazon RDS Or Google cloud SQL or Heroku.

Scripts can be written in pure SQL To write （ Support many dialects ） Or use Java To write （ Mainly used for more complex transformations ）. It has a command-line client , But it also provides Maven and Gradle plug-in unit .

what's more , It has Java API, Can also be applied to Android.

For those using .NET and C# For people who , There is one named Evolve Of Flyway Corresponding software , So if you're interested in , You can take a look at this software . its GitHub The link to the page will be at the end of the article .

Liquibase Detailed description of

It begins with 2006 year , Is an open source tool for database migration .

It is based on the concept of change log and change set file , These documents can be used SQL、XML、YAML、JSON To write . There? , We store all the changes we want to make in the database structure . These files can be further used to apply these changes to any other database instance .

Liquibase Support subsequent databases .Postgres、Oracle、DB2、H2、MariaDB、SQL Server、SQLite, And many other databases . Many cloud based databases are also supported , for example Azure SQL、Amazon RDS、Amazon Aurora.

You can start your shell Run in Liquibase Migration scripts , Use Maven Gradle even to the extent that Ant And so on . Besides , You can generate pure SQL Inquire about , It's up to you DBA-s/Ops/DevOps The team or anyone else who is taking care of your database will go further .

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