metasearch (TokyoTyrant::RDBQRY)

    # File tokyotyrant.rb, line 1421
        def metasearch(others, type = MSUNION)
          raise ArgumentError if !others.is_a?(Array)
          args = @args.dup
          others.each do |other|
            next if !other.is_a?(RDBQRY)
            args.push("next")
            other._args.each do |arg|
              args.push(arg)
            end
          end
          args.push("mstype\0" + type.to_s)
          @hint = ""
          rv = @rdb.misc("metasearch", args, RDB::MONOULOG)
          return Array::new if !rv
          _popmeta(rv)
          return rv
        end