mysql 巧用存储过程

根据距离排序

CREATE DEFINER=`ln` PROCEDURE `Proc_4`(IN `lon1` double,IN `lat1` double,IN `PageStart` int,IN `PageStep` int,IN `type` int,IN `uniacid1` int)
BEGIN
select merchname,address,lng,lat,ser.*, ROUND(

        6378.138 * 2 * ASIN(

            SQRT(

                POW(

                    SIN(

                        (

                            lat1 * PI() / 180 - lat * PI() / 180

                        ) / 2

                    ),

                    2

                ) + COS(lat1 * PI() / 180) * COS(lat * PI() / 180) * POW(

                    SIN(

                        (

                            lon1 * PI() / 180 - lng * PI() / 180

                        ) / 2

                    ),

                    2

                )

            )

        ) * 1000

    ) AS juli from merch_service  as ser
inner join merch on ser.merchid=merch.id
where merch.`status` in (1,3)
and ser.type=type
and ser.uniacid=uniacid1
and merch.uniacid=uniacid1
ORDER BY  juli asc
LIMIT PageStart,PageStep;
END

复杂点可以用

CREATE DEFINER=`ln` PROCEDURE `Proc_3`(IN `lon1` double,IN `lat1` double,IN `PageStart` int,IN `PageStep` int,IN `type` varchar(20),IN `uniacid` int,IN `iscommand` int,IN `distance` int)
BEGIN
IF iscommand = 0 THEN
    set @isCommand= ' order by juli asc';
ELSE
    set @isCommand= ' order by isrecommand desc ,juli asc';
END IF;
IF distance = 0 THEN
    set @distance= ' ';
ELSE
    set @distance= CONCAT(' and `juli` <= ', distance);
END IF;
set @type = CONCAT('%',type,'%');
set @_where = " where `status` IN(1,3)";
set @_where = CONCAT(@_where,' AND `diyformdata` like "',@type,'"');
set @_where = CONCAT(@_where,' AND `uniacid` = ', uniacid);
set @_where = CONCAT(@_where,@distance);
set @sql = CONCAT(
"SELECT * FROM
(SELECT
    *,

    ROUND(

        6378.138 * 2 * ASIN(

            SQRT(

                POW(

                    SIN(

                        (

                            ",lat1," * PI() / 180 - lat * PI() / 180

                        ) / 2

                    ),

                    2

                ) + COS(",lat1," * PI() / 180) * COS(lat * PI() / 180) * POW(

                    SIN(

                        (

                            ",lon1," * PI() / 180 - lng * PI() / 180

                        ) / 2

                    ),

                    2

                )

            )

        ) * 1000

    ) AS juli

FROM

    merch)a ");
set @sql = CONCAT(@sql,@_where,@isCommand, ' limit ', PageStart, ',', PageStep);
prepare stmt from @sql; -- 预编释一下。 “stmt”预编释变量的名称，
execute stmt; -- 执行SQL语句
deallocate prepare stmt; -- 释放资源  

END