存储过程_游标

CREATE DEFINER="root"@"%" PROCEDURE "sp_mall_category_move"(in parentId int,in level int)
BEGIN

  DECLARE _id int;
  DECLARE _parentId int;
  DECLARE _name varchar(255);
  DECLARE _path varchar(255);
  DECLARE _parentPath varchar(255) DEFAULT '0.';
  DECLARE _level varchar(255);

  -- 遍历数据结束标志
  DECLARE done INT DEFAULT FALSE;
  -- 游标
  DECLARE cur CURSOR FOR SELECT id,name,parent_id FROM mall_category where parent_id = parentId;
  -- 将结束标志绑定到游标
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

  -- 设置递归最大的深度
  SET @@max_sp_recursion_depth = 10; 

  -- 打开游标
  OPEN cur;

  -- 开始循环
  read_loop: LOOP
    -- 提取游标里的数据，这里只有一个，多个的话也一样；
    FETCH cur INTO _id,_name,_parentId;
    -- 声明结束的时候
    IF done THEN
      LEAVE read_loop;
    END IF;

    IF parentId != 0 THEN
      SELECT path into _parentPath from ymall_category where id = parentId;
    END IF;

    set _path = CONCAT(_parentPath,_id,'.');
    -- 插入数据
    INSERT INTO ymall_category(id,name,parent_id,path,level,sort,relations_num,deleted) VALUES (_id,_name,_parentId,_path,level,_id,0,0);

    set _level = level+1;
    -- 遍历所有子节点
    call sp_mall_category_move(_id,_level);
  END LOOP;
  -- 关闭游标
  CLOSE cur;
END

---

BEGIN

DECLARE contractNo VARCHAR(255) default null;
DECLARE contractId VARCHAR(16) default null;
declare strIds VARCHAR(1000) default null;
DECLARE num int(10) default null;


DECLARE done INT DEFAULT FALSE;
DECLARE cur CURSOR FOR SELECT guid_contract_no,source_contract FROM ymall_contract_guide_relation;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
SET @@max_sp_recursion_depth = 10; 

delete from temp_contract_guide_relation;

OPEN cur;
read_loop: LOOP

    FETCH cur INTO contractNo,strIds;

    IF done THEN
      LEAVE read_loop;
    END IF;

    set num = length(strIds) - length(replace(strIds,',',''));  -- 算出分隔符的总数  
    while num>0 DO
        set contractId = substr(strIds,1,instr(strIds,',')-1); 
        set strIds = substr(strIds,length(contractId)+2); 
        INSERT INTO temp_contract_guide_relation(contract_no,relation_id) VALUES (contractNo,contractId);
        set num = num - 1;  
    end while;

    INSERT INTO temp_contract_guide_relation(contract_no,relation_id) VALUES (contractNo,strIds);

END LOOP;
CLOSE cur;
end