text: -- Copyright 2020 The Nomulus Authors. All Rights Reserved.
  --
  -- Licensed under the Apache License, Version 2.0 (the "License");
  -- you may not use this file except in compliance with the License.
  -- You may obtain a copy of the License at
  --
  --     http://www.apache.org/licenses/LICENSE-2.0
  --
  -- Unless required by applicable law or agreed to in writing, software
  -- distributed under the License is distributed on an "AS IS" BASIS,
  -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  -- See the License for the specific language governing permissions and
  -- limitations under the License.
  
  ALTER TABLE "Domain" ADD COLUMN admin_contact text;
  ALTER TABLE "Domain" ADD COLUMN billing_contact text;
  ALTER TABLE "Domain" ADD COLUMN registrant_contact text;
  ALTER TABLE "Domain" ADD COLUMN tech_contact text;
  
  alter table if exists "Domain"
     add constraint fk_domain_admin_contact
     foreign key (admin_contact)
     references "Contact";
  
  alter table if exists "Domain"
     add constraint fk_domain_billing_contact
     foreign key (billing_contact)
     references "Contact";
  
  alter table if exists "Domain"
     add constraint fk_domain_registrant_contact
     foreign key (registrant_contact)
     references "Contact";
  
  alter table if exists "Domain"
     add constraint fk_domain_tech_contact
     foreign key (tech_contact)
     references "Contact";
  