public function _childValidation()
 {
     if (Tools::getValue('submitAdd' . $this->table) && ($sql = Tools::getValue('sql'))) {
         $request_sql = new RequestSql();
         $parser = $request_sql->parsingSql($sql);
         $validate = $request_sql->validateParser($parser, false, $sql);
         if (!$validate || count($request_sql->error_sql)) {
             $this->displayError($request_sql->error_sql);
         }
     }
 }