用MySQL 生成随机密码增加大写处理

以前写过：

http://blog.chinaunix.net/uid-259788-id-2139370.html

这次增加了大写字母的处理。

DELIMITER $$

USE `t_girl`$$

DROP FUNCTION IF EXISTS `func_rand_string`$$

CREATE DEFINER=`root`@`localhost` FUNCTION `func_rand_string`(f_num TINYINT UNSIGNED,f_type TINYINT UNSIGNED) RETURNS VARCHAR(32) CHARSET utf8
BEGIN
      -- Translate the number to letter.
      -- No 1 stands for string only.
      -- No 2 stands for number only.
      -- No 3 stands for combination of the above.
      DECLARE i INT UNSIGNED DEFAULT 0;
      DECLARE v_result VARCHAR(255) DEFAULT '';
      WHILE i < f_num DO
        IF f_type = 1 THEN
          SET v_result = CONCAT(v_result,CHAR(65+32*(CEIL(RAND()*2)-1)+CEIL(RAND()*25)));
        ELSEIF f_type=2 THEN
          SET v_result = CONCAT(v_result,CEIL(RAND()*9));
        ELSEIF f_type=3 THEN
          IF (CEIL(RAND()*2)-1) = 1 THEN
            SET v_result = CONCAT(v_result,SUBSTRING(REPLACE(UUID(),'-',''),i+1,1));
          ELSE 
            SET v_result = CONCAT(v_result,UPPER(SUBSTRING(REPLACE(UUID(),'-',''),i+1,1)));
          END IF;
        END IF;
        SET i = i + 1;
      END WHILE; 
      RETURN v_result;
    END$$

DELIMITER ;

调用方法类似。