text: CREATE EXTENSION IF NOT EXISTS plpgsql WITH SCHEMA pg_catalog;
  COMMENT ON EXTENSION plpgsql IS 'PL/pgSQL procedural language';
  CREATE EXTENSION IF NOT EXISTS citext WITH SCHEMA public;
  COMMENT ON EXTENSION citext IS 'data type for case-insensitive character strings';
  CREATE EXTENSION IF NOT EXISTS "uuid-ossp" WITH SCHEMA public;
  COMMENT ON EXTENSION "uuid-ossp" IS 'generate universally unique identifiers (UUIDs)';
  