0x00

　　level: 0x02

0x01

　　code:

-- 删除 DROP FUNCTION IF EXISTS get_varchar_test; -- 创建 CREATE FUNCTION get_varchar_test(_id INT) RETURNS VARCHAR(4) CHARACTER SET utf8 COLLATE utf8_general_ciBEGIN       DECLARE content VARCHAR(4) CHARACTER SET utf8 COLLATE utf8_general_ci;    # t_na 值为 '中文ab'    SELECT t_na INTO content FROM t1 WHERE t_id = _id;    RETURN content; END; -- 测试SELECT get_varchar_test(1);

0x02

　　ps: 给VARCHAR设置字符集就可以了