private function setNeededFieldByType($tblName, $dtls, $features)
    {
        if (isset($features['special']) && isset($features['special'][$dtls['COLUMN_NAME']])) {
            $sOpt = $this->setMySQLquery2Server($features['special'][$dtls['COLUMN_NAME']], 'array_key_value');
            return $this->setArrayToSelect($sOpt, $this->getFieldValue($dtls), $dtls['COLUMN_NAME'], ['size' => 1]);
        }
        return $this->setNeededFieldKnown($tblName, $dtls, $features);
    }