text: ----
  -- Copyright (c) 2011-2017 Apple Inc. 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.
  ----
  
  ---------------------------------------------------
  -- Upgrade database schema from VERSION 16 to 17 --
  ---------------------------------------------------
  
  
  ------------------------------
  -- CALENDAR_OBJECT clean-up --
  ------------------------------
  
  begin
  for i in (select constraint_name from user_cons_columns where column_name = 'ORGANIZER_OBJECT')
  loop
  execute immediate 'alter table calendar_object drop constraint ' || i.constraint_name;
  end loop;
  end;
  
  alter table CALENDAR_OBJECT
   drop (ORGANIZER_OBJECT);
  
  create index CALENDAR_OBJECT_ICALE_82e731d5 on CALENDAR_OBJECT (
      ICALENDAR_UID
  );
  
  
  -- Now update the version
  update CALENDARSERVER set VALUE = '17' where NAME = 'VERSION';
  