存储过程执行有误，请进来看具体情况解决思路

/************************购物车生成订单并支付[gen_order_cart]******************/alter procedure gen_order_cart@UserName    varchar(14)as    declare    @balance float,    --用户余额    @pay float,        --购物车总价    @flag1 int,        --操作成功标志    @flag2 int,    @flag3 int;        --获取账户余额    select @balance=Balance from Member where [email protected];    if @balance is null    begin        print '账户余额为空';        return;    end        --获取购物车总价    select @pay=sum(TmpPrice) from (select TmpPrice from Cart,TmpDetail         where Cart.TmpID=TmpDetail.TmpID and [email protected]) as T;    if @pay is null    begin        print '购物车为空';        return;    end    --判断账户余额是否足以支付购物车中项目    if @balance<@pay    begin        print '余额不足以支付';        return;    end        --删除购物车项目并扣除账户余额，同时添加订单记录    set @flag1=1;    set @flag2=1;        set @flag3=1;    BEGIN TRANSACTION        --删除购物车项目        delete from Cart where [email protected];        print '用户[[email protected]+']购物车已经清空';            if @@rowcount=0            set @flag1=0;            --添加订单记录        insert into "Order" (UserName,TmpID,PayTime) (select UserName,TmpID,getdate() from Cart where [email protected]);        print '用户[[email protected]+']购买记录已经添加';        if @@rowcount=0            set @flag2=0;        --扣除账户余额        update Member set Balance=([email protected]) where [email protected];        print '用户[[email protected]+']余额已经扣除';        if @@rowcount=0            set @flag3=0;        --处理操作结果标识        if @flag1=0 or @flag2=0 or @flag3=0            ROLLBACK TRANSACTION;        else            COMMIT TRANSACTION;go

--添加订单记录        insert into "Order" (UserName,TmpID,PayTime) (select UserName,TmpID,getdate() from Cart where [email protected]);        print '用户[[email protected]+']购买记录已经添加';        if @@rowcount=0            set @flag2=0;

delete from Cart where [email protected];        print '用户[[email protected]+']购物车已经清空';            if @@rowcount=0            set @flag1=0;
------解决方案--------------------
JF!