将 character_set_client 的值设置为 utf8mb4

Question

我正在尝试将我的数据库转换为utf8mb4遵循本指南。我已经设定：

[client]
default-character-set=utf8mb4

[mysql]
default-character-set=utf8mb4

[mysqld]
init-connect='SET NAMES utf8mb4'
collation_server=utf8mb4_unicode_ci
character_set_server=utf8mb4
skip-character-set-client-handshake

但价值character_set_client并character_set_results仍然不会改变utf8mb4。

mysql> SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%';
+--------------------------+--------------------+
| Variable_name            | Value              |
+--------------------------+--------------------+
| character_set_client     | utf8               |
| character_set_connection | utf8mb4            |
| character_set_database   | utf8mb4            |
| character_set_filesystem | binary             |
| character_set_results    | utf8               |
| character_set_server     | utf8mb4            |
| character_set_system     | utf8               |
| collation_connection     | utf8mb4_unicode_ci |
| collation_database       | utf8mb4_unicode_ci |
| collation_server         | utf8mb4_unicode_ci |
+--------------------------+--------------------+

我究竟做错了什么？如何将这些值设置为 utf8mb4？

Answer 1

披露：我是How to support full Unicode in MySQL databases 的作者，这是您正在遵循的指南。

1. 你在哪里保存修改的设置？检查从哪里mysqld加载默认选项。它通常是/etc/my.cnf（如指南中所述），但在您的系统上可能会有所不同。运行以下命令找出：

   $ mysqld --help --verbose 2> /dev/null | grep -A1 'Default options'
   Default options are read from the following files in the given order:
   /etc/my.cnf /etc/mysql/my.cnf /usr/local/etc/my.cnf ~/.my.cnf
   

2. 您是否在进行更改后mysqld通过运行重新启动mysqld restart？