func

• 该表提供查询与information_schema.routines表类似的内容（早期版本主要用于记录用户自定义函数），但information_schema.routines表记录的更加详细

• 另外，该表还专用于记录从so插件库中安装的函数信息

• 表结构定义

CREATE TABLE `func` (
  `name` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
  `ret` tinyint(1) NOT NULL DEFAULT '0',
  `dl` char(128) COLLATE utf8_bin NOT NULL DEFAULT '',
  `type` enum('function','aggregate') CHARACTER SET utf8 NOT NULL,
  PRIMARY KEY (`name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='User defined functions';

• 表字段含义

• 详见information_schema.routines表，这里不再赘述

• 表记录内容示例（这里列出的示例内容为从企业版so插件中安装的UDF函数）

root@localhost : mysql 12:52:05> select * from func;
+--------------------------------+-----+--------------+-----------+
| name | ret | dl | type |
+--------------------------------+-----+--------------+-----------+
| audit_log_filter_flush | 0 | audit_log.so | function |
| audit_log_filter_remove_user | 0 | audit_log.so | function |
| audit_log_filter_set_user | 0 | audit_log.so | function |
| audit_log_filter_remove_filter | 0 | audit_log.so | function |
| audit_log_filter_set_filter | 0 | audit_log.so | function |
| set_firewall_mode | 0 | firewall.so | function |
| normalize_statement | 0 | firewall.so | function |
| mysql_firewall_flush_status | 0 | firewall.so | function |
| read_firewall_whitelist | 0 | firewall.so | aggregate |
| read_firewall_users | 0 | firewall.so | aggregate |
+--------------------------------+-----+--------------+-----------+
10 rows in set (0.00 sec)

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