ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,IMPLICIT) and (gbk_chinese_ci,COERCIB

在查询时，反馈了如下错误：

ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,IMPLICIT) and (gbk_chinese_ci,COERCIBLE) for operation 'like'

mysql> show variables like '%coll%';
+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | gbk_chinese_ci  |
| collation_database   | utf8_general_ci |
| collation_server     | utf8_general_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

三者信息不一致。

查看我参数文件配置，发现[client]和[mysql]字符集都是gbk

[client]
default-character-set=gbk
[mysql]
default-character-set=gbk

可以修改本会话变量collation_connection为utf8_general_ci解决。但是下次再连接时就又失效了。而且该参数不能通过修改全局变量使所有会话生效，只能通过修改参数文件。

修改配置文件，将[client]和[mysql]下的default-character-set都改为utf8,重启数据库，

mysql> show variables like '%coll%';
+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database   | utf8_general_ci |
| collation_server     | utf8_general_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

再查询，没有再报这个错误了。