mysql输入文字的代码_MySQL 自定义函数 - 根据输入汉字获取拼音的全拼

CREATE DEFINER=`root`@`%` FUNCTION `to_pinyin`(NAME VARCHAR(255) CHARSET gbk) RETURNS varchar(255) CHARSET gbk

BEGIN

DECLARE mycode INT;

DECLARE tmp_lcode VARCHAR(2) CHARSET gbk;

DECLARE lcode INT;

DECLARE tmp_rcode VARCHAR(2) CHARSET gbk;

DECLARE rcode INT;

DECLARE mypy VARCHAR(255) CHARSET gbk DEFAULT '';

DECLARE lp INT;

SET mycode = 0;

SET lp = 1;

SET NAME = HEX(NAME);

WHILE lp < LENGTH(NAME) DO

SET tmp_lcode = SUBSTRING(NAME, lp, 2);

SET lcode = CAST(ASCII(UNHEX(tmp_lcode)) AS UNSIGNED);

SET tmp_rcode = SUBSTRING(NAME, lp + 2, 2);

SET rcode = CAST(ASCII(UNHEX(tmp_rcode)) AS UNSIGNED);

IF lcode > 128 THEN

SET mycode =65536 - lcode * 256 - rcode ;

SELECT CONCAT(mypy,pin_yin_) INTO mypy FROM t_base_pinyin WHERE CODE_ >= ABS(mycode) ORDER BY CODE_ ASC LIMIT 1;

SET lp = lp + 4;

ELSE

SET mypy = CONCAT(mypy,CHAR(CAST(ASCII(UNHEX(SUBSTRING(NAME, lp, 2))) AS UNSIGNED)));

SET lp = lp + 2;

END IF;

END WHILE;

RETURN LOWER(mypy);

END