This brief tutorial will teach how to get up and running with the Flyway Maven Plugin. It will take you through the steps on how to configure it and how to write and execute your first few database migrations.
This tutorial should take you about 5 minutes to complete.
We’re going to create our project using the Maven Archetype Plugin by issuing the following command:
> mvn archetype:generate -B ^ -DarchetypeGroupId=org.apache.maven.archetypes ^ -DarchetypeArtifactId=maven-archetype-quickstart ^ -DarchetypeVersion=1.1 ^ -DgroupId=foo ^ -DartifactId=bar ^ -Dversion=1.0-SNAPSHOT ^ -Dpackage=foobar
We are now ready to get started. Let’s jump into our project:
> cd bar
Let’s integrate Flyway and the H2 database into our new
pom.xml and configure Flyway so it can successfully connect to H2:
<project xmlns="..."> ... <build> <plugins> <plugin> <groupId>org.flywaydb</groupId> <artifactId>flyway-maven-plugin</artifactId> <version>5.2.4</version> <configuration> <url>jdbc:h2:file:./target/foobar</url> <user>sa</user> </configuration> <dependencies> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <version>1.4.191</version> </dependency> </dependencies> </plugin> </plugins> </build> </project>
We create the migration directory
Followed by a first migration called
create table PERSON ( ID int not null, NAME varchar(100) not null );
It’s now time to execute Flyway to migrate our database:
bar> mvn flyway:migrate
If all went well, you should see the following output:
[INFO] Database: jdbc:h2:file:./target/foobar (H2 1.4) [INFO] Successfully validated 1 migration (execution time 00:00.009s) [INFO] Creating Schema History table: "PUBLIC"."flyway_schema_history" [INFO] Current version of schema "PUBLIC": << Empty Schema >> [INFO] Migrating schema "PUBLIC" to version 1 - Create person table [INFO] Successfully applied 1 migration to schema "PUBLIC" (execution time 00:00.038s)
If we now add a second migration called
insert into PERSON (ID, NAME) values (1, 'Axel'); insert into PERSON (ID, NAME) values (2, 'Mr. Foo'); insert into PERSON (ID, NAME) values (3, 'Ms. Bar');
and execute it by issuing:
bar> mvn flyway:migrate
We now get:
[INFO] Database: jdbc:h2:file:./target/foobar (H2 1.4) [INFO] Successfully validated 2 migrations (execution time 00:00.012s) [INFO] Current version of schema "PUBLIC": 1 [INFO] Migrating schema "PUBLIC" to version 2 - Add people [INFO] Successfully applied 1 migration to schema "PUBLIC" (execution time 00:00.018s)
In this brief tutorial we saw how to
These migrations were then successfully found and executed.