text: --
  --    Copyright 2009-2018 the original author or authors.
  --
  --    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.
  --
  
  DROP TABLE country IF EXISTS;
  DROP TABLE planet IF EXISTS;
  
  CREATE TABLE country
  (
      Id          INT IDENTITY,
      countryname VARCHAR(255) DEFAULT NULL,
      countrycode VARCHAR(255) DEFAULT NULL,
  );
  
  CREATE TABLE planet
  (
      id   INT IDENTITY,
      name VARCHAR(32) DEFAULT NULL,
      code VARCHAR(64) GENERATED ALWAYS AS (name || '-' || id)
  );
  