text: /* Copyright 2016 OpenMarket Ltd
   *
   * 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 users ADD is_guest SMALLINT DEFAULT 0 NOT NULL;
  /*
   * NB: any guest users created between 27 and 28 will be incorrectly
   * marked as not guests: we don't bother to fill these in correctly
   * because guest access is not really complete in 27 anyway so it's
   * very unlikley there will be any guest users created.
   */
  