5、创建FEDERATED引擎表的链接方式
scheme: A recognized connection protocol. Only mysql is supported as the scheme value at this point.
链接示例样本:
6、涉及到的相关参考
使用FREDATED引擎实现跨实例访问(二)
]# service mysql start
Starting MySQL.[ OK ]
[root@rhel64a ~]# mysql -uroot -pxxx
root@localhost[(none)]> select * from information_schema.engines where engine='federated';
+-----------+---------+--------------------------------+--------------+------+------------+
| ENGINE | SUPPORT | COMMENT | TRANSACTIONS | XA | SAVEPOINTS |
+-----------+---------+--------------------------------+--------------+------+------------+
| FEDERATED | YES | Federated MySQL storage engine | NO | NO | NO |
+-----------+---------+--------------------------------+--------------+------+------------+
root@localhost[(none)]> use test
-- 创建基于FEDERATED引擎的表federated_engine
root@localhost[test]> CREATE TABLE `federated_engine` (
-> `engine` varchar(64) NOT NULL DEFAULT '',
-> `support` varchar(8) NOT NULL DEFAULT '',
-> `comment` varchar(80) NOT NULL DEFAULT ''
-> ) ENGINE=FEDERATED DEFAULT CHARSET=utf8
-> CONNECTION='mysql://remote_user:xxx@192.168.1.131:3406/tempdb/tb_engine';
Query OK, 0 rows affected (0.00 sec)
-- 下面是创建后表格式文件
root@localhost[test]> system ls -hltr /var/lib/mysql/test
total 12K
-rw-rw---- 1 mysql mysql 8.5K Oct 24 08:22 federated_engine.frm
--查询表federated_engine
root@localhost[test]> select * from federated_engine limit 2;
+------------+---------+---------------------------------------+
| engine | support | comment |
+------------+---------+---------------------------------------+
| MRG_MYISAM | YES | Collection of identical MyISAM tables |
| CSV | YES | CSV storage engine |
+------------+---------+---------------------------------------+
--更新表federated_engine
root@localhost[test]> update federated_engine set support='NO' where engine='CSV';
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0
--查看更新后的结果
root@localhost[test]> select * from federated_engine where engine='CSV';
+--------+---------+--------------------+
| engine | support | comment |
+--------+---------+--------------------+
| CSV | NO | CSV storage engine |
+--------+---------+--------------------+