CREATE DEFINER=`by`@`%` FUNCTION `fun_pinyin`(`P_NAME` VARCHAR(255)) RETURNS varchar(255) CHARSET utf8

    NO SQL

BEGIN

    DECLARE V_COMPARE VARCHAR(255);

    DECLARE V_RETURN VARCHAR(255);

    DECLARE I INT;

    SET I = 1;

    SET V_RETURN = '';

    while I <= char_length(P_NAME) do

        SET V_COMPARE = SUBSTR(P_NAME, I, 1);

        IF (V_COMPARE != '') THEN

            SET V_RETURN = CONCAT(V_RETURN, fun_first_pinyin(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

CREATE DEFINER=`by`@`%` FUNCTION `fun_first_pinyin`(`P_NAME` VARCHAR(5)) RETURNS varchar(5) CHARSET utf8

    NO SQL

BEGIN

    DECLARE V_RETURN VARCHAR(5);

    SET V_RETURN = ELT(INTERVAL(CONV(HEX(left(CONVERT(P_NAME USING gbk),1)),16,10),

        0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE,0xBBF7,

        0xBFA6,0xC0AC,0xC2E8,0xC4C3,0xC5B6,0xC5BE,0xC6DA,0xC8BB,

        0xC8F6,0xCBFA,0xCDDA,0xCEF4,0xD1B9,0xD4D1),

    'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z');

        IF ISNULL(V_RETURN) or V_RETURN = '' THEN

            RETURN '';

        ELSE

            RETURN V_RETURN;

        END IF;

END