什么是插件及其在mysql中的工作方式？

我正在MySql官方网站(https://dev.mysql.com/doc/refman/5.1/en/partitioning.html)中探讨分区.
在第一页中,我发现了插件.

MysqL> show plugins;
+----------------------------+----------+--------------------+---------+---------+
| Name                       | Status   | Type               | Library | License |
+----------------------------+----------+--------------------+---------+---------+
| binlog                     | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| MysqL_native_password      | ACTIVE   | AUTHENTICATION     | NULL    | GPL     |
| MysqL_old_password         | ACTIVE   | AUTHENTICATION     | NULL    | GPL     |
| sha256_password            | ACTIVE   | AUTHENTICATION     | NULL    | GPL     |
| MyISAM                     | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| MRG_MYISAM                 | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| MEMORY                     | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| CSV                        | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| InnoDB                     | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| INNODB_TRX                 | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_LOCKS               | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_LOCK_WAITS          | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_CMP                 | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_CMP_RESET           | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_CMPMEM              | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_CMPMEM_RESET        | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_CMP_PER_INDEX       | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_CMP_PER_INDEX_RESET | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_BUFFER_PAGE         | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_BUFFER_PAGE_LRU     | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_BUFFER_POOL_STATS   | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_METRICS             | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_FT_DEFAULT_STOPWORD | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_FT_DELETED          | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_FT_BEING_DELETED    | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_FT_CONfig           | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_FT_INDEX_CACHE      | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_FT_INDEX_TABLE      | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_TABLES          | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_TABLESTATS      | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_INDEXES         | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_COLUMNS         | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_FIELDS          | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_FOREIGN         | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_FOREIGN_COLS    | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_TABLESPACES     | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| INNODB_SYS_DATAFILES       | ACTIVE   | informatION SCHEMA | NULL    | GPL     |
| PERFORMANCE_SCHEMA         | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| FEDERATED                  | disABLED | STORAGE ENGINE     | NULL    | GPL     |
| ARCHIVE                    | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| BLACKHOLE                  | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
| partition                  | ACTIVE   | STORAGE ENGINE     | NULL    | GPL     |
+----------------------------+----------+--------------------+---------+---------+
42 rows in set (0.05 sec)

我心里有一些疑问

>什么是插件？
>运作方式如何？
> MysqL有多少可用插件？
>我可以添加其他插件吗？
>如果我可以添加,那么如何添加？

解决方法:

经过分析关于插件后,我发现了更多有关它的信息.我深入解释.

What is plugins and How it is work?

MysqL 支持用于创建服务器组件的插件API.可以在服务器启动时加载插件,也可以在运行时加载和卸载插件,而无需重新启动服务器.该API是通用的,没有指定插件可以做什么.该接口支持的组件包括但不限于存储引擎,全文解析器插件和服务器扩展.

例如,全文分析器插件可用于替换或增强内置的全文分析器.插件可以使用与内置解析器不同的规则将文本解析为单词.如果您需要分析文本特征与内置解析器所期望的特征不同,这将很有用.

The plugin interface is more general than the older user-defined
function (UDF) interface.

How much plugin available for MySql? (Types of Plugins)

插件API支持创建具有多种功能的插件：

>存储引擎
>全文解析器
>守护程序
> informatION_SCHEMA表
>半同步复制
>审计
>认证
>密码验证和强度检查
>协议跟踪
>查询重写

Can i add other plugins ? / If i can add then how to add ?

使用INSTALL PLUGIN语句安装的插件：

可以在运行时使用INSTALL PLUGIN语句加载位于插件库文件中的插件.该语句还在MysqL.plugin表中注册了插件,以使服务器在后续重启时将其加载.因此,INSTALL PLUGIN需要MysqL.plugin表的INSERT特权.

MysqL> INSTALL PLUGIN myplugin SONAME 'somepluglib.so';

卸载插件

在运行时,UNINSTALL PLUGIN语句禁用和卸载服务器已知的插件.该语句卸载插件并将其从MysqL.plugin表中删除(如果已在其中注册).因此,UNINSTALL PLUGIN语句需要MysqL.plugin表的DELETE特权.如果插件不再在表中注册,服务器将不会自动加载插件以供后续重启.

什么是插件及其在mysql中的工作方式？

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