本站中文解释
plugin_dir 是 MySQL引擎的配置参数，可以配置插件的安装路径，MySQL提供的插件有助于使用者更加自由地配置MySQL。要设置 plugin_dir，需要在my.ini文件中加入：
plugin_dir = 路径
如果某个插件安装在另一个特定位置，你可以指定该路径，即：
plugin_dir = 路径1;路径2;路径3;
并且，以分号为分隔符，将所有路径连接起来
官方英文解释
plugin_dir
| Command-Line Format | --plugin-dir=dir_name |
|---|---|
| System Variable | plugin_dir |
| Scope | Global |
| Dynamic | No |
| Type | Directory name |
| Default Value | BASEDIR/lib/plugin |
The path name of the plugin directory.
If the plugin directory is writable by the server, it may be
possible for a user to write executable code to a file in the
directory using SELECT. This can be prevented by making
... INTO DUMPFILE
plugin_dir read only to the
server or by setting
secure_file_priv to a
directory where SELECT writes
can be made safely.
