MYSQL存储过程中使用游标嵌套的实例

MYSQL存储过程中使用游标嵌套的实例 MySQL 存储过程 delimiter $$drop procedure if exists findErrorLifeRoute $$CREATE PROCEDURE findErrorLifeRoute() BEGINdeclare routeId,routeStopId BIGINT ; declare str,tmp_street VARCHAR(255) ; DECLARE l_done

MYSQL存储过程中使用游标嵌套的实例

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delimiter $$drop procedure if exists findErrorLifeRoute $$CREATE PROCEDURE findErrorLifeRoute()   BEGINdeclare routeId,routeStopId BIGINT   ; declare str,tmp_street VARCHAR(255)  ; DECLARE l_done,num,life,localId,tmp_localId INT DEFAULT  0;-- 声明两个游标，第二个游标使用到第一个的查询结果DECLARE grade_csr cursor  FOR SELECT route_id FROM routes where   LIFE_CYCLE_STATUS35001;DECLARE class_csr cursor  FOR SELECT LOCATION_INNER_ID,STREET FROM route_stops  WHERE ROUTE_ID=routeId order by STOP_NUMBER asc;DECLARE CONTINUE HANDLER FOR NOT FOUND SET l_done=1;  OPEN grade_csr;-- 第一个循环  grade_loop: LOOP   -- Loop through org_grade    FETCH grade_csr into routeId;    IF l_done=1 THEN       LEAVE grade_loop;    END IF;		SET num=0;		set tmp_street=null;		set tmp_localId=0;    OPEN class_csr;-- 第二个循环    class_loop: LOOP      -- Loop through class in grade.      FETCH class_csr INTO localId,str;      IF l_done=1 THEN         LEAVE class_loop;      END IF;      if localId =tmp_localId or (str is not null and str=tmp_street) THEN				set tmp_street=str;				set tmp_localId=localId;			else				set num=num+1;				set tmp_street=str;				set tmp_localId=localId;		end if;		 -- 结束第一个循环    END LOOP class_loop;    CLOSE class_csr;    SET l_done=0;		set life=36000+(num-1)*100+6; 		INSERT into route_tmp (select ROUTE_ID,LIFE_CYCLE_STATUS,num,life,ACCOUNT_ID,str <b>本文来源gao@dai!ma.com搞$代^码!网7</b>from routes r where r.ROUTE_ID=routeId and LIFE_CYCLE_STATUS=life  );-- 结束第二个循环  END LOOP grade_loop;  CLOSE grade_csr;END $$delimiter ;

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