MySQL 自定义函数 - 根据输入的汉字获取汉字拼音的首字母函数

 

 

 

 

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CREATE DEFINER=`root`@`%` FUNCTION `pinyin`(P_NAME VARCHAR(255)) RETURNS varchar(255) CHARSET utf8 BEGIN     DECLARE V_COMPARE VARCHAR(255);     DECLARE V_RETURN VARCHAR(255);     DECLARE I INT;     SET I = 1;     SET V_RETURN = '';     while I < LENGTH(P_NAME) do         SET V_COMPARE = SUBSTR(P_NAME, I, 1);         IF (V_COMPARE != '') THEN             #SET V_RETURN = CONCAT(V_RETURN, ',', V_COMPARE);             SET V_RETURN = CONCAT(V_RETURN, fristPinyin(V_COMPARE));             #SET V_RETURN = fristPinyin(V_COMPARE);         END IF;         SET I = I + 1;     end while;     IF (ISNULL(V_RETURN) or V_RETURN = '') THEN         SET V_RETURN = P_NAME;     END IF;     RETURN V_RETURN; END