储存程序：

CREATE DEFINER=`newdb`@`%` PROCEDURE `GetMaximumIDsCount`(IN AppID INT,IN isBurnCenter INT,IN BurnCenterID INT)
BEGIN

    IF isBurnCenter = 1 THEN

    SELECT MAX(CAST(b.hospitalid AS SIGNED))

    FROM tblhosipital b

    WHERE b.appId = AppID AND b.burncenterid IS NULL;

    END IF;

    IF isBurnCenter = 0 THEN

    SELECT MAX(CAST(h.hospitalid AS SIGNED))

    FROM tblhosipital h

    WHERE h.appId = AppID AND h.burncenterid <> '' AND h.burncenterid = BurnCenterID;

    END IF;
END

从applicationdbcontext调用（代码优先）

public virtual ObjectResult<long?> GetMaximumIDsCount2(Nullable<int> appID, Nullable<int> isBurnCenter, Nullable<int> burnCenterID)
        {
            var appIDParameter = appID.HasValue ?
                new ObjectParameter("AppID", appID) :
                new ObjectParameter("AppID", typeof(int));

            var isBurnCenterParameter = isBurnCenter.HasValue ?
                new ObjectParameter("isBurnCenter", isBurnCenter) :
                new ObjectParameter("isBurnCenter", typeof(int));

            var burnCenterIDParameter = burnCenterID.HasValue ?
                new ObjectParameter("BurnCenterID", burnCenterID) :
                new ObjectParameter("BurnCenterID", typeof(int));

            return ((IObjectContextAdapter)this).ObjectContext.ExecuteStoreQuery<Nullable<long>>("GetMaximumIDsCount @AppID, @isBurnCenter, @BurnCenterID", appIDParameter, isBurnCenterParameter, burnCenterIDParameter);
        }

获取异常：
sql语法有错误；请查看与您的mysql服务器版本对应的手册，以了解在第1行的“getmaximumidscount@appid，@isburnchenter，@burnchenterid”附近使用的正确语法