text: CREATE OR REPLACE FUNCTION __temp_Upgrade_AddDisksTable()
  RETURNS void
  AS $function$
  BEGIN
     IF EXISTS (SELECT * FROM pg_tables WHERE tablename ILIKE 'disks') THEN
         RETURN;
     END IF;
  
     -- Add the disks table.
     CREATE TABLE disks
     (
        disk_id UUID NOT NULL,
        status VARCHAR(32) NOT NULL,
        internal_drive_mapping INTEGER NOT NULL,
        active_image_id UUID CONSTRAINT fk_disk_active_image REFERENCES images(image_guid) ON DELETE SET NULL,
        disk_type VARCHAR(32) NOT NULL,
        disk_interface VARCHAR(32) NOT NULL,
        wipe_after_delete BOOLEAN NOT NULL DEFAULT false,
        propagate_errors VARCHAR(32) NOT NULL DEFAULT 'Off',
        CONSTRAINT pk_disks PRIMARY KEY(disk_id)
     )
     WITH OIDS;
  
  END; $function$
  LANGUAGE plpgsql;
  
  
  SELECT * FROM __temp_Upgrade_AddDisksTable();
  
  DROP FUNCTION __temp_Upgrade_AddDisksTable();
  
  