Add a new column in existing table customerdetails using preconditions in liquibase

add-new-column-with-precondition.xml

<?xml version="1.1" encoding="UTF-8" standalone="no"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
  <changeSet author="mohitgoyal" id="20190304223500">
    <preConditions onFail="HALT">
        <tableExists schemaName="dbo" tableName="CustomerDetails"/>
    </preConditions>
    <addColumn schemaName="dbo" tableName="CustomerDetails">
        <column name="CustomerAddress" type="varchar(255)"/>
    </addColumn>
  </changeSet>
</databaseChangeLog>