mysql 存储过程

DELIMITER $$
CREATE DEFINER=`root`@`%` PROCEDURE `pro_cre_childlist`(IN rootId varchar(50),IN nDepth int, IN vdesc varchar(45))
BEGIN   
      DECLARE done INT DEFAULT 0;   
      DECLARE b varchar(50);   
      DECLARE cur1 CURSOR FOR SELECT loginname FROM users WHERE rid=rootId;   
      DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;   
      SET max_sp_recursion_depth=15;   
       
      INSERT INTO tmpLst VALUES (NULL,rootId,nDepth,vdesc);   
       
      OPEN cur1;   
       
      FETCH cur1 INTO b;   
      WHILE done=0 DO   
              CALL pro_cre_childlist(b,nDepth+1,vdesc);   
              FETCH cur1 INTO b;   
      END WHILE;   
       
      CLOSE cur1;   
END$$
DELIMITER ;