+ def get_domains_from_db()
+ domains = []
+
+ # Just assume PostgreSQL for now.
+ begin
+ connection = PGconn.connect(@db_host,
+ @db_port,
+ @db_opts,
+ @db_tty,
+ @db_name,
+ @db_user,
+ @db_pass)
+
+ # 'ALL' is a magic domain, and we don't want it.
+ sql_query = "SELECT domain FROM domain WHERE domain <> 'ALL';"
+ connection.query(sql_query) do |result|
+ domains = result.field_values('domain')
+ end
+ connection.close()
+ rescue PGError => e
+ # But pretend like we're database-agnostic in case we ever are.
+ raise DatabaseError.new(e)
+ end
+
+ return domains
+ end
+
+