有没有办法在postgres数据库在liquibase中执行变更集之前创建它

<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
                   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="createDatabase" author="your_name">
        <preConditions onFail="MARK_RAN">
            <not>
                <dbms type="postgresql"/>
            </not>
        </preConditions>
        <createDatabase
                encoding="UTF8"
                dbName="your_database_name"
                username="your_username"
                password="your_password"
                />
    </changeSet>

</databaseChangeLog>

liquibase --changeLogFile=changelog.xml update