MySQL 存储过程示例

两种方法获取返回值

1.用select

BEGIN
SELECT * from nodelist t where t.id = id;

END;

2.用out模式或者inout模式

BEGIN
END;

 

声明变量  datatype 为 MySQL 的数据类型

declare cid int unsigned default 40000;
declare ccs VARCHAR(255) default "";

赋值

set @tid = inParam;
set cid = cid +@tid;

if-else  case-when-then   while

IF @tid = 1 then
    set @tid = 2;
else
    set cid = 20;
end if;

case @tid
when 0 THEN
    set @tid=100;
when 1 then
    set @tid=200;
else
    set @tid=300;
end case;

while @tid>0 do
    set cid=cid+1;
    set @tid = @tid-1;
end while;

mybatis调用MySQL函数和过程

<!-- mybatis xml --> 
<select id="shopOrderQty" resultType="java.lang.Integer" parameterType="java.lang.Integer">
        select shopQtyCount(#{shopId}) from dual
</select>

CREATE DEFINER=`duomai_test`@`%` FUNCTION `shopQtyCount`(`shopId` int) RETURNS int(11)
BEGIN
RETURN (select count(1) from zmd_order where order_shop_id=shopId and trade_status in (4,5));
END

//输出模式为out 或者inout
@Select("call discussOrdersFun(#{param.upPrice,mode=OUT,jdbcType=DECIMAL},#{param.isReadDiscuss,mode=OUT,jdbcType=TINYINT})")
@Options(statementType = StatementType.CALLABLE)//OUT参数时需要开启CALLABLE
void discussOrdersFun(@Param("param")DiscussOrdersResponse discussOrdersResponse);

CREATE DEFINER=`duomai_test`@`%` PROCEDURE `discussOrdersFun`(OUT `upPrice` decimal,OUT `isReadDiscuss` tinyint)
BEGIN
	set upPrice=1;
        set isReadDiscuss=1;
END



//使用MySQL过程select输出列表
@Select("call discussOrdersFun()")
DiscussOrdersResponse discussOrdersFun();

CREATE DEFINER=`duomai_test`@`%` PROCEDURE `discussOrdersFun`()
BEGIN
	select 1 as 'upPricea',2 as 'isReadDiscuss' from dual;
END

 

来源：oschina

链接：https://my.oschina.net/xhbl/blog/4314845