cassandra_InvalidRequestException::read PHP Méthode

    public function read($input)
    {
        $xfer = 0;
        $fname = null;
        $ftype = 0;
        $fid = 0;
        $xfer += $input->readStructBegin($fname);
        while (true) {
            $xfer += $input->readFieldBegin($fname, $ftype, $fid);
            if ($ftype == TType::STOP) {
                break;
            }
            switch ($fid) {
                case 1:
                    if ($ftype == TType::STRING) {
                        $xfer += $input->readString($this->why);
                    } else {
                        $xfer += $input->skip($ftype);
                    }
                    break;
                default:
                    $xfer += $input->skip($ftype);
                    break;
            }
            $xfer += $input->readFieldEnd();
        }
        $xfer += $input->readStructEnd();
        return $xfer;
    }