<changelog xmlns="http://www.codesynthesis.com/xmlns/odb/changelog" version="1"> <changeset version="2"> <alter-table name="object"> <add-column name="o1" type="INT" null="true"/> <add-foreign-key name="object_o1_fk" deferrable="DEFERRED"> <column name="o1"/> <references table="object1"> <column name="id"/> </references> </add-foreign-key> </alter-table> </changeset> <model version="1"> <table name="object"> <column name="id" type="INT" null="false"/> <primary-key auto="true"> <column name="id"/> </primary-key> </table> <table name="object1"> <column name="id" type="INT" null="false"/> <primary-key> <column name="id"/> </primary-key> </table> </model> </changelog>