Create a new java project
Add liquibase.properties
changeLogFile: dbchangelog.xml url: jdbc:mariadb://localhost:3306/policy username: policy password: *****
Add dbchangelog.xml
<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
xmlns:pro="http://www.liquibase.org/xml/ns/pro"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.8.xsd">
<changeSet id="1" author="admin">
<createTable tableName="department">
<column name="id" type="int">
<constraints primaryKey="true" nullable="false"/>
</column>
<column name="name" type="varchar(50)">
<constraints nullable="false"/>
</column>
<column name="active" type="boolean" defaultValueBoolean="true"/>
</createTable>
</changeSet>
</databaseChangeLog>
Add pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.liquibase.mariadb.app</groupId>
<artifactId>LiquibaseMariadbp</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-maven-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<propertyFile>liquibase.properties</propertyFile>
</configuration>
<dependencies>
<dependency>
<groupId>org.mariadb.jdbc</groupId>
<artifactId>mariadb-java-client</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.6.Final</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
From the command line in the project directory
mvn package
mvn liquibase:update
Check you database, table department has been added
mvn liquibase:rollback -Dliquibase.rollbackCount=1
table department has been dropped
Add the following 2 lines to liquibase.properties
outputChangeLogFile: dbchangelog.mariadb.yaml
diffTypes: catalog,tables,views,columns,indexes,foreignkeys,primarykeys,uniqueconstraints,data,storedprocedure
mvn liquibase:generateChangeLog
The file dbchangelog.mariadb.yaml will contain the DDL for your database in YAML format
change outputChangeLogFile: dbchangelog.mariadb.yaml to outputChangeLogFile: dbchangelog.mariadb.sql
The file dbchangelog.mariadb.sql will contain the DDL for your database in SQL format
Add dbchangelog.yaml
databaseChangeLog:
- changeSet:
id: 1
author: admin
changes:
- createTable:
tableName: person
columns:
- column:
name: id
type: int
autoIncrement: true
constraints:
primaryKey: true
nullable: false
- column:
name: firstname
type: varchar(50)
- column:
name: lastname
type: varchar(50)
constraints:
nullable: false
- column:
name: state
type: char(2)
- changeSet:
id: 2
author: admin
changes:
- addColumn:
tableName: person
columns:
- column:
name: username
type: varchar(8)
- changeSet:
id: 3
author: admin
changes:
- addLookupTable:
existingTableName: person
existingColumnName: state
newTableName: state
newColumnName: id
newColumnDataType: char(2)
Add a new plugin dependency to pom.xml
<dependency>
<groupId>org.yaml</groupId>
<artifactId>snakeyaml</artifactId>
<version>1.28</version>
</dependency>
mvn package
mvn liquibase:update
3 new entries in the databasechangelog table
select * from databasechangelog; +----+--------+------------------+---------------------+---------------+----------+------------------------------------+---------------------------------------------------------------------------------------------------------+----------+------+-----------+----------+--------+---------------+ | ID | AUTHOR | FILENAME | DATEEXECUTED | ORDEREXECUTED | EXECTYPE | MD5SUM | DESCRIPTION | COMMENTS | TAG | LIQUIBASE | CONTEXTS | LABELS | DEPLOYMENT_ID | +----+--------+------------------+---------------------+---------------+----------+------------------------------------+---------------------------------------------------------------------------------------------------------+----------+------+-----------+----------+--------+---------------+ | 1 | admin | dbchangelog.yaml | 2021-05-20 16:07:58 | 1 | EXECUTED | 8:f022085620a9dd87ae9ca1f93da51fd0 | createTable tableName=person | | NULL | 3.8.0 | NULL | NULL | 1523278917 | | 2 | admin | dbchangelog.yaml | 2021-05-20 16:07:58 | 2 | EXECUTED | 8:e3f0f50eb245f66c68ec504db93b6717 | addColumn tableName=person | | NULL | 3.8.0 | NULL | NULL | 1523278917 | | 3 | admin | dbchangelog.yaml | 2021-05-20 16:07:59 | 3 | EXECUTED | 8:12a8bb9e438047d9332c8aec4f90a76e | addLookupTable existingColumnName=state, existingTableName=person, newColumnName=id, newTableName=state | | NULL | 3.8.0 | NULL | NULL | 1523278917 | +----+--------+------------------+---------------------+---------------+----------+------------------------------------+---------------------------------------------------------------------------------------------------------+----------+------+-----------+----------+--------+---------------+
mvn liquibase:rollback -Dliquibase.rollbackCount=1
[INFO] Rolling Back Changeset:dbchangelog.yaml::3::admin
[INFO] ALTER TABLE person DROP FOREIGN KEY FK_PERSON_STATE
[INFO] DROP TABLE state
[INFO] DELETE FROM DATABASECHANGELOG WHERE ID = '3' AND AUTHOR = 'admin' AND FILENAME = 'dbchangelog.yaml'
mvn liquibase:rollback -Dliquibase.rollbackCount=2
[INFO] Rolling Back Changeset:dbchangelog.yaml::2::admin
[INFO] ALTER TABLE person DROP COLUMN username
[INFO] DELETE FROM DATABASECHANGELOG WHERE ID = '2' AND AUTHOR = 'admin' AND FILENAME = 'dbchangelog.yaml'
[INFO] Rolling Back Changeset:dbchangelog.yaml::1::admin
[INFO] DROP TABLE person
[INFO] DELETE FROM DATABASECHANGELOG WHERE ID = '1' AND AUTHOR = 'admin' AND FILENAME = 'dbchangelog.yaml'