我想在go中的行中使用NEXT，但我的vw在行中收到了警告。NEXT 它說 NEXT undefined （type *“database/sql”）。行沒有字段或方法 NEXT）     func FetchViewDO() (shipment_admin.ShipmentViewDetailDOGroup, error) {            var obj ShipmentDOBaseModel            var objg ShipmentDOGroup            var arrobj []ShipmentDOBaseModel            var res shipment_admin.ShipmentViewDetailDOGroup                    var db *sql.DB                    con := db            sqlStatement := `SELECT s.status_id,sdog.*,sdo.shipment_id,sdo.external_id,sdo.client_code        FROM shipment_delivery_order sdo        LEFT JOIN shipment_delivery_order_group sdog ON sdog.shipment_child_id = sdo.shipment_id        LEFT JOIN shipment s ON s.shipment_id = sdo.shipment_id`                    rows, err := con.Query(sqlStatement)            defer rows.Close()                    if err != nil {                return res, err            }                    for rows.NEXT() {                err = rows.Scan(&objg.ShipmentParentID, &objg.CreatedAt, &objg.ShipmentChildID)                if err != nil {                    return res, err                }            }            res.Status = http.StatusOK            res.Message = "Success"            res.Data = arrobj                    return res, nil                }