docs: private static int runCommand(final TSDB tsdb,
                                  final boolean use_data_table,
                                  final String[] args) throws Exception {
      final int nargs = args.length;
      if (args[0].equals("lookup")) {
        if (nargs < 2) { // need a query
          usage(null, "Not enough arguments");
          return 2;
        }
        return lookup(tsdb, use_data_table, args);
      } else {
        usage(null, "Unknown sub command: " + args[0]);
        return 2;
      }
    }