Requirements

To use YAML-based changelogs, you must include snakeyaml-<version>.jar in your classpath.

Liquibase ships with snakeyaml.jar already in the Internal>Lib folder, which is already in the default classpath.

Example

This example changelog contains changesets that:

1. Create a new person table with columns id, firstname, lastname, and state

2. Add a new username column to the person table

3. Create a lookup table state using data from person

The example precondition requires the user making the deployment to be liquibase.

You can add YAML comments outside changesets using the format # my comment.