mysql存储过程嵌套循环并分页处理数据

CREATE PROCEDURE evi_doc_refs_eid_deal() begin declare pageNum int default 0; declare totalSize int default 0; declare pageSize int default 5; declare totalPage int DEFAULT 0; declare startIndex int default 0; select count(*) into totalSize from osv_service_evidence where type != 11 and type !=12 and type !=50 ; set totalPage = totalSize/pageSize; while ( pageNum<totalPage-1) do #对分页的起始下标计算，以便分页查询时使用 set startIndex = pageNum *pageSize; #开启事务 　START TRANSACTION; #嵌套内部分页查询，通过游标处理分页查询结果记录 begin #声明变量 declare eviId varchar(50); declare evidenceEid varchar(50); declare done int default 0; declare mark varchar(2); declare eid_value varchar(50); declare type_value int default 0; declare eid_mark varchar(50); 　　　　 declare num int DEFAULT 0; 　　　　#定义分页查询结果的游标 declare i_cur cursor for select id from osv_service_evidence where type !=11 and type !=12 and type !=50 limit startIndex,pageSize; declare continue handler for sqlstate ‘09000‘ set done = 1; open i_cur; fetch next from i_cur into eviId; WHILE (done = 0 ) do #判断每页中处理数据的下标index set num = num+1; select type into type_value from osv_service_evidence where id = eviId; select e.eid into eid_value from osv_service_evidence e where id = eviId; if(0 =type_value|null = eid_value) then fetch next from i_cur into eviId; end if; 　　　　　　#数据处理 if type_value =40 then set mark = ‘O‘; set eid_mark=concat(mark,eid_value);update evi_doc_refs set docEid = eid_mark where docEviId = eviId; elseif type_value =11 then set mark = ‘S‘; set eid_mark=concat(mark,eid_value);update evi_doc_refs set docEid = eid_mark where docEviId = eviId;set done = 0; end if; 　　　　　#如果当前页处理的数据已达页记录数值，通过done退出内部循环，进入外部循环 　　　　 IF num = pageSize THEN set done = 1; 　　　　 #否则继续当前循环 　　　　　　ELSEIF num !=pageSize THEN set done =0; 　　　　　　fetch next from i_cur into eviId; 　　　　　 END IF; END WHILE; 　　　　#关闭游标 close i_cur; end ; COMMIT; 　　#更新下一次处理的页码，+1 set pageNum = pageNum+1; end while; END;

call evi_doc_refs_eid_deal();

 

##创建出证订单表中存证编号为null的情况下更新所用存储过程
create procedure evi_order_refs_eid_deal()
begin
declare original_eviId varchar(50);
declare evidenceEid varchar(50);
declare done int default 0;
declare mark varchar(2);
declare eid_value varchar(50);
declare type_value int default 0;
declare eid_mark varchar(50);
# declare existence boolean ;
##
declare cur cursor for select eviId  from evi_order_refs where evidenceEid is null order by createTime desc;
##异常处理(触发sql语句失败，执行结束)
declare continue handler for sqlstate ‘09000‘ set done = 1;
open cur;
    ##取出游标值至变量中
    fetch next from cur into original_eviId;
　　repeat
    if not done then 
       
                    select type into type_value  from osv_service_evidence where id = original_eviId;
                    #逻辑判断，如果eviId确实在存证表中无记录，直接忽略该条出证记录
                    
                    select e.eid into eid_value from osv_service_evidence e where id = original_eviId;
                    #逻辑判断，如果eviId确实在存证表中无记录，直接忽略该条出证记录
                    if(0 =type_value|null = eid_value) then fetch next from cur into original_eviId;
                    end if;
                        
                    if     type_value =40 then set mark = ‘O‘;set eid_mark=concat(mark,eid_value);update evi_order_refs set evidenceEid = eid_mark where eviId = original_eviId;
                    elseif type_value =11 then set mark = ‘S‘;set eid_mark=concat(mark,eid_value);update evi_order_refs set evidenceEid = eid_mark where eviId = original_eviId;else  set done = 0;
　　　　　　　　　　　　end if;
    　　　　　　end if;
        #if(done = 1) then leave cur;
        
        ##重新抓取数据进入循环
    fetch next from cur into original_eviId;
##结束循环
until done end repeat;
##关闭游标
close cur;
end ;

 

mysql存储过程嵌套循环并分页处理数据

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