$query = 'SELECT '.$this->DataValueField.','.$this->DataVarField.' FROM '.$this->SessionDataTable.' WHERE '.$this->IDField.' = '.$this->Conn->qstr($this->Session->SID);
//return $this->Conn->GetOne('SELECT '.$var_name.' FROM '.$this->TableName.' WHERE `'.$this->IDField.'` = '.$this->Conn->qstr($this->Session->GetID()) );