mysql 存储过程使用游标实例

 

使用了mysql存储过程、临时表、游标

CREATE DEFINER=`root`@`%` PROCEDURE `get_driver_nearconsumer`(

    in_groupid int,

    in_serviceid int

)

BEGIN

declare temp_id int;

declare temp_x decimal(10,6);

declare temp_y decimal(10,6);

declare temp_c_x decimal(10,6);

declare temp_c_y decimal(10,6);


DECLARE done bool default FALSE;  


DECLARE cur1 CURSOR FOR SELECT int_driver,dec_x,dec_y FROM 

(

    select 

        d.*, a.vc_name as grouparea_name , g.dec_x,g.dec_y,g.dt_sc

        ,c.dcount,dd.consumer_name,dd.vc_fadd,dd.vc_tadd,dd.int_service,dd.int_status

    from bi_driver d  

    left join bi_gisdata g

    on g.int_mubiao = d.int_driver and g.int_type = 1

    left join  bi_grouparea a 

    on a.int_grouparea = d.int_area

    left join 

    (select count(1) as dcount,int_driver  

    from bi_serviceinfo 

    where int_status >-1  and int_status < 100 group by int_driver

    ) c

    on c.int_driver = d.int_driver 

    left join 

    (select int_service,consumer_name,vc_fadd,vc_tadd,int_driver,int_status 

    from v_serviceinfo 

    where int_service in 

        (select int_service from bi_serviceinfo 

        where  int_status >-1  and int_status < 100 and ifnull(int_driver,0)>0 

        group by int_driver)

    ) dd

    on dd.int_driver = d.int_driver 

    where int_area = in_groupid  and g.dt_sc>DATE_ADD(CURRENT_TIMESTAMP,INTERVAL -1 HOUR) 

) cur_table;


DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = true;#结束标识  


DROP TABLE IF EXISTS r_table ; 

CREATE TEMPORARY TABLE r_table 

select 

    d.*, a.vc_name as grouparea_name , g.dec_x,g.dec_y,g.dt_sc

    ,c.dcount,dd.consumer_name,dd.vc_fadd,dd.vc_tadd,dd.int_service,dd.int_status

    ,g.dec_x as distance#添加一列记录距离

from bi_driver d  

left join bi_gisdata g

on g.int_mubiao = d.int_driver and g.int_type = 1

left join  bi_grouparea a 

on a.int_grouparea = d.int_area

left join 

(select count(1) as dcount,int_driver  

from bi_serviceinfo 

where int_status >-1  and int_status < 100 group by int_driver

) c

on c.int_driver = d.int_driver 

left join 

(select int_service,consumer_name,vc_fadd,vc_tadd,int_driver,int_status 

from v_serviceinfo 

where int_service in 

    (select int_service from bi_serviceinfo 

    where  int_status >-1  and int_status < 100 and ifnull(int_driver,0)>0 

    group by int_driver)

) dd

on dd.int_driver = d.int_driver 

where int_area = in_groupid  and g.dt_sc>DATE_ADD(CURRENT_TIMESTAMP,INTERVAL -1 Hour) ;


#delete from r_table;

set temp_c_x =(select dec_fx from bi_serviceinfo where int_service = in_serviceid );

set temp_c_y =(select dec_fy from bi_serviceinfo where int_service = in_serviceid);

#select temp_c_x,temp_c_y;


OPEN cur1;

fetchSeqLoop:Loop

FETCH cur1 INTO temp_id,temp_x,temp_y;

if done then  

    leave fetchSeqLoop;  

else    

    #select temp_id,temp_x,temp_y;

    update r_table set distance = f_getdistance(temp_c_x,temp_c_y,temp_x,temp_y) where int_driver = temp_id;

end if;  

end Loop;  

CLOSE cur1;


select * from r_table where distance < 2000 order by distance;

drop table r_table;



END