Error while sending QUERY packet.

496                 Yii::trace('Query result found in cache','system.db.CDbCommand');497                 return $result[0];498             }499         }500501         try502         {503             if($this->_connection->enableProfiling)504                 Yii::beginProfile('system.db.CDbCommand.query('.$this->getText().$par.')','system.db.CDbCommand.query');505506             $this->prepare();507             if($params===array())508                 $this->_statement->execute();509             else510                 $this->_statement->execute($params);511512             if($method==='')513                 $result=new CDbDataReader($this);514             else515             {516                 $mode=(array)$mode;517                 call_user_func_array(array($this->_statement, 'setFetchMode'), $mode);518                 $result=$this->_statement->$method();519                 $this->_statement->closeCursor();520             }