Deploying Changes to DB2 on z/OS using SQL Scripts

Step 1: Create a SQL folder

In the Liquibase project folder that you created, create a folder named sql_files to store SQL scripts that Liquibase will track, version, and deploy.

The directory structure should look like this:

$LB_HOME/db2_zos/sql_files

Step 2: Set up the changelog

This is a one-time step to configure a change log to point to the SQL folder that will contain SQL scripts. Create and save a file called changelog.xml in the Liquibase project directory you created ($LB_HOME/db2_zos).

The contents of changelog.xml should be as follows:

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
	xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
	xmlns:pro="http://www.liquibase.org/xml/ns/pro"
	xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
		http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
		http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd
		http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd">	
<includeAll path="sql_files"/>
</databaseChangeLog>

Step 3: Add an SQL Script to the SQL Folder

With a Liquibase properties file, like liquibase.properties from the tutorial setup and the newly created changelog.xml, we are now ready to start adding SQL scripts to the sql_files folder. Liquibase orders the scripts in the folder alphanumerically.

Create a file named 001_create_person_table.sql with the following and save it in the sql_files folder:

create table PERSON (
ID int not null,
FNAME varchar(100) not null
);

Step 4: Check your database

Navigate to your project folder in the CLI and run the Liquibase status command to see whether the connection is successful:

liquibase --username=test --password=test --changelog-file=<changelog.xml> status

Note: You can pass arguments in the CLI or keep them in the Liquibase properties file.

Inspect the SQL with the update-sql command. Then make changes to your database with the update command:

liquibase --changelog-file=<changelog.xml> update-sql
liquibase --changelog-file=<changelog.xml> update

From a database UI tool, ensure that your database contains the table you added along with the DATABASECHANGELOG table and DATABASECHANGELOGLOCK table.

Common command line arguments

Use can use command line arguments to override the default options at runtime. The following are common command line arguments:

Command line argument	Action
--changelog-file=<path and filename>	Specify the XML changelog
--url=<value>	Specify a database URL
--defaultsFile=<path to file.properties>	Specify the properties file. Default is ./liquibase.properties).