Question

从昨天开始，我就在这个问题上失去了理智。

我正在尝试将我的MySQL数据库从utf8转换为utf8mb4。为此，我关注了这些网站/主题：https://mathiasbynens.be/notes/mysql-utf8mb4#utf8-to-utf8mb4，Cannot store emoji in database，Change MySQL default character set to UTF-8 in my.cnf?等。

我的数据库似乎有预期的utf8mb4_unicode_ci collation，以及她所有的表格。

然而，当我继续SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%';时，我获得了：

#With a Root access
Variable_name              Value
character_set_client        utf8                #expecting utf8mb4
character_set_connection    utf8                #expecting utf8mb4
character_set_database      utf8mb4             #good
character_set_filesystem    binary              #good
character_set_results       utf8                #expecting utf8mb4
character_set_server        utf8mb4             #good
character_set_system        utf8                #expecting utf8mb4
collation_connection        utf8_general_ci     #expecting utf8mb4_unicode_ci
collation_database          utf8mb4_unicode_ci  #good
collation_server            utf8mb4_unicode_ci  #good

#With a standard user access
Variable_name               Value
character_set_client        utf8                #expecting utf8mb4
character_set_connection    utf8mb4             #good 
character_set_database      utf8mb4             #good
character_set_filesystem    binary              #good
character_set_results       utf8                #expecting utf8mb4
character_set_server        utf8mb4             #good
character_set_system        utf8                #expecting utf8mb4
collation_connection        utf8mb4_unicode_ci  #good
collation_database          utf8mb4_unicode_ci  #good
collation_server            utf8mb4_unicode_ci  #good

我设置了/etc/mysql/conf.d/90-my.cnf这样的文件：

[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4

[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init-connect = 'SET collation_connection = utf8mb4_unicode_ci'
init-connect = 'SET NAMES utf8mb4'

我的MySQL版本是5.5.54，全部设置在debian 7中。

有没有人有线索要帮助我？

谢谢你的帮助，抱歉我的英语不好......

修改

有趣的事实：当我在内联命令中检查变量时，我得到了这个：

mysql> show variables like "%character%";
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8mb4                    |
| character_set_connection | utf8mb4                    |
| character_set_database   | utf8mb4                    |
| character_set_filesystem | binary                     |
| character_set_results    | utf8mb4                    |
| character_set_server     | utf8mb4                    |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+

当我使用phpmyadmin（非超级用户访问权限）检查时，utf8和character_set_client仍有character_set_results

Answer 1

以用户root进行连接时，会忽略init-connect。

为您的应用程序提供自己的登录，无需 SUPER权限。

然后，为了更加确定，每当从您的应用程序建立连接时，请执行提供字符集的特定于语言的方法。（或执行SET NAMES utf8mb4。）您使用的是哪种应用语言？

如果出现其他问题，请参阅＆＃34;最佳实践＆＃34;在Trouble with utf8 characters; what I see is not what I stored

如何最终在MySQL上正确设置utf8mb4？

1 个答案: