mysql 5.7修改字符集

摘要: 5.7 不支持配置文件中mysqld字段不支持default-character-set=utf8

For the recent version of MySQL,

default-character-set = utf8

causes a problem. It's deprecated I think.

As Justin Ball says in "Upgrade to MySQL 5.5.12 and now MySQL won’t start, you should:

Remove that directive and you should be good.

Then your configuration file ('/etc/my.cnf' for example) should look like that:

[mysqld]
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8

Restart MySQL.

For making sure, your MySQL is UTF-8, run the following queries in your MySQL prompt:

First query:

mysql> show variables like 'char%';

The output should look like:

+--------------------------+---------------------------------+
| Variable_name            | Value                           |
+--------------------------+---------------------------------+
| character_set_client     | utf8                            |
| character_set_connection | utf8                            |
| character_set_database   | utf8                            |
| character_set_filesystem | binary                          |
| character_set_results    | utf8                            |
| character_set_server     | utf8                            |
| character_set_system     | utf8                            |
| character_sets_dir       | /usr/local/mysql/share/charsets/|
+--------------------------+---------------------------------+

Second query:

mysql> show variables like 'collation%';

And the query output is:

+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database   | utf8_unicode_ci |
| collation_server     | utf8_unicode_ci |
+----------------------+-----------------+