concat_wc 我用中文的、来分开三个字符 报错error 但是用别的英文下的字符是对的，是我配置没有调好还是逻辑有问题呢
mysql> select concat_ws ('、',type_id,parent_id,type_name)as fullname from st1;
ERROR 1271 (HY000): Illegal mix of collations for operation 'concat_ws'
mysql> select concat_ws (、,type_id,parent_id,type_name)as fullname from st1;
ERROR 1054 (42S22): Unknown column '、' in 'field list'
