5.5.2 Obtaining Server Plugin Information

There are several ways to determine which plugins are installed in the server:

• The Information Schema PLUGINS table contains a row for each loaded plugin. Any that have a PLUGIN_LIBRARY value of NULL are built in and cannot be unloaded.

  mysql> SELECT * FROM INFORMATION_SCHEMA.PLUGINS\G
  *************************** 1. row ***************************
             PLUGIN_NAME: binlog
          PLUGIN_VERSION: 1.0
           PLUGIN_STATUS: ACTIVE
             PLUGIN_TYPE: STORAGE ENGINE
     PLUGIN_TYPE_VERSION: 50158.0
          PLUGIN_LIBRARY: NULL
  PLUGIN_LIBRARY_VERSION: NULL
           PLUGIN_AUTHOR: MySQL AB
      PLUGIN_DESCRIPTION: This is a pseudo storage engine to represent the binlog in a transaction
          PLUGIN_LICENSE: GPL
             LOAD_OPTION: FORCE
  ...
  *************************** 10. row ***************************
             PLUGIN_NAME: InnoDB
          PLUGIN_VERSION: 1.0
           PLUGIN_STATUS: ACTIVE
             PLUGIN_TYPE: STORAGE ENGINE
     PLUGIN_TYPE_VERSION: 50158.0
          PLUGIN_LIBRARY: ha_innodb_plugin.so
  PLUGIN_LIBRARY_VERSION: 1.0
           PLUGIN_AUTHOR: Innobase Oy
      PLUGIN_DESCRIPTION: Supports transactions, row-level locking,
                          and foreign keys
          PLUGIN_LICENSE: GPL
             LOAD_OPTION: ON
  ...

• The SHOW PLUGINS statement displays a row for each loaded plugin. Any that have a Library value of NULL are built in and cannot be unloaded.

  mysql> SHOW PLUGINS\G
  *************************** 1. row ***************************
     Name: binlog
   Status: ACTIVE
     Type: STORAGE ENGINE
  Library: NULL
  License: GPL
  ...
  *************************** 10. row ***************************
     Name: InnoDB
   Status: ACTIVE
     Type: STORAGE ENGINE
  Library: ha_innodb_plugin.so
  License: GPL
  ...

• The mysql.plugin table shows which plugins have been registered with INSTALL PLUGIN. The table contains only plugin names and library file names, so it does not provide as much information as the PLUGINS table or the SHOW PLUGINS statement.