下订单存储过程 - MYSQL

BEGIN

    DECLARE smark INT; DECLARE orderId INT; /*查询课程是否存在，若是不存在就不执行订单操做了*/
    SET @count = (SELECT count(1) FROM t_course WHERE id = courseId); IF @count = 0 THEN 
        SELECT "noexist"; ELSE 
        /*查询某个课程是否已经报名，若是已经报名了就不须要在报名了*/
        SET @c1 = (SELECT COUNT(1) FROM t_shoporder sd WHERE sd.user_id = userId AND sd.course_id = courseId AND sd.is_delete = 0); /*我报名的课程*/
        IF @c1 = 0 THEN
            /*若是没有报名*/
            /*订单号的设定*/
            SET @orderNum = CONVERT(CONCAT( "ms_",DATE_FORMAT(NOW(),'%Y%m%d'), courseId, CEIL(RAND() * 99999), userId ),CHARACTER); SET @price = (SELECT tprice FROM t_course WHERE id = courseId); /*保存订单*/
            INSERT INTO t_shoporder ( user_id, is_delete, num, price, description, ip, ipAddress, order_number, STATUS, course_id, type )VALUES( userId, 0, tnum, @price, CONCAT("用户【",username,"】,在",DATE_FORMAT(NOW(),'%Y-%m-%d'),"位于",ip,"/",ipAddress,"提交订单，数量是",tnum,",金额是：￥",@price), ip, ipAddress, @orderNum, 0, courseId, NULL ); /*查询当前订单的最后一条ID*/
            SET @orderId = (SELECT id FROM t_shoporder WHERE order_number = @orderNum); /*拼接订单号，确保惟一*/
            SET @onumber = CONVERT(CONCAT(@orderNum,@orderId), CHARACTER); /*修改订单号*/
            UPDATE t_shoporder SET order_number = @onumber WHERE id = @orderId; /*返回订单和状态*/
            SELECT CONCAT(@orderId,"#",0); ELSE
            SELECT ts.id, ts.status INTO orderId, smark FROM t_shoporder ts WHERE ts.is_delete = 0 AND ts.course_id = courseId AND ts.user_id userId; IF smark = 0 THEN
                SELECT CONCAT(orderId,"#",0);        /*已经支付了*/
            ELSE 
                SELECT CONCAT(orderId,"#",1);        /*已经支付了*/
            END IF; END IF; END IF; END;