text: -- @testpoint: 匹配字符为中文英文数字特殊符号
  DROP TABLE IF EXISTS type_char;
  CREATE TABLE type_char (string1 char(100));
  insert into type_char values ('我是123AA@_BBCC');
  SELECT  (string1 LIKE '%A@_B%') from type_char AS RESULT;
  DROP TABLE IF EXISTS type_char;