You now have a database with a single empty table called flyway_schema_history. As the database is empty, Flyway won’t find it and will create it instead. When the migration process starts, Flyway tries to locate its schema history table. Public | flyway_schema_history | table | postgres Now, if we check into the Docker process and we log into the Database, we can see that the migration was completed successfully: $ docker psģc22fb3e2adb postgres:10.5 "docker-entrypoint." 31 minutes ago Up 31 minutes 0.0.0.0:5432->5432/tcp flyway_test Migrating schema "public" to version 1.2 - insert account table Migrating schema "public" to version 1.1 - create account table Creating Schema History table "public"."flyway_schema_history". You should see in your Console logs: Successfully validated 2 migrations (execution time 00:00.024s) To execute the example just run: mvn clean compile flyway:migrate INSERT into account ( user_id, username, password, country) VALUES ('bc123454','mark','twain','usa') The second script (V1_2_insert_account_table.sql), executes a couple of inserts in the Table: INSERT into account ( user_id, username, password, country) VALUES ('a1234567','frank','smith','usa') The first SQL script (V1_1_create_account_table.sql) contains the DDL of a table: CREATE TABLE account( Here is the tree view of our basic project: src Please note that SQL migration files must follow Flyway‘s convention See here for more details: In our case, they are placed in src/main/resources/flyway/migrations We also have to specify the location where migrations files are located. We have included flyway-maven-plugin which requires in its properties the URL,username and password of the target database. Jdbc:postgresql://localhost:5432/postgresįilesystem:src/main/resources/flyway/migrations Now create the simplest Maven project and modify its pom.xml to include the following content: Performing a Flyway migration using its Maven plugin The quickest way to get started, is to launch it as Docker container: $ docker run -rm=true -name flyway_test -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=postgres -e POSTGRES_DB=postgres -p 5432:5432 postgres:10.5Ĭheck that the PostgreSQL process is active: $ docker psĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESģc22fb3e2adb postgres:10.5 "docker-entrypoint." 21 minutes ago Up 21 minutes 0.0.0.0:5432->5432/tcp flyway_test We will be using PostgreSQL for our Migration examples. Access to the flyway-core dependency, either directly from Java code or using Flyway shell script / Maven plugin.A set of SQL scripts containing the Database schema and its migrations.An available Database which is supported by Flyway (See ).In order to perform a Database migration with Flyway here is our checklist: In this post, I will show you the steps required to perform a database migration using FlyWay Maven Plugin and then we will show you how to execute the migration programmatically from within an Enterprise application. You can trigger Flyway in several ways: either use its command line client or integrate it into your Java application. Flyway keeps track of all applied migrations into your relational database so that it can detect and execute the required migration steps to update your database to the latest version. This tutorial will show you how to perform database migrations using FlyWay in two different use cases: using Flyway Maven’s plugin and performing the Migration within an Enterprise Application running on WildFly.įlyway is an open-source library that allows you to automate version-based database migrations.
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