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mysql使用federated实现dblink远程表访问_MySQL

作者：彭彭宅男丶 | 来源：互联网 | 2017-05-12 16:11
mysql使用federated实现dblink远程表访问
bitsCN.com 1. source 端创建测试表
create table s select * from mysql.user ;

2. source 端查看测试表的建表语句
show create table s ;

<CREATE TABLE `s` (
`Host` char(60) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT &＃39;&＃39;,
`User` char(16) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT &＃39;&＃39;,
`Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT &＃39;&＃39;,
`Select_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Insert_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Update_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Delete_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Drop_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Reload_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Shutdown_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Process_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`File_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Grant_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`References_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Index_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Alter_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Show_db_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Super_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_tmp_table_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Lock_tables_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Execute_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Repl_slave_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Repl_client_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_view_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Show_view_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_routine_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Alter_routine_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_user_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Event_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Trigger_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_tablespace_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`ssl_type` enum(&＃39;&＃39;,&＃39;ANY&＃39;,&＃39;X509&＃39;,&＃39;SPECIFIED&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;&＃39;,
`ssl_cipher` blob NOT NULL,
`x509_issuer` blob NOT NULL,
`x509_subject` blob NOT NULL,
`max_questions` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`max_updates` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`max_connections` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`max_user_connections` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`plugin` char(64) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT &＃39;&＃39;,
`authentication_string` text CHARACTER SET utf8 COLLATE utf8_bin,
`password_expired` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;
) ENGINE=InnoDB DEFAULT CHARSET=latin1

EOF

3. source端创建用户并且授权

GRANT ALL PRIVILEGES ON sources.s TO dex IDENTIFIED BY &＃39;xiaojun&＃39;;
GRANT ALL PRIVILEGES ON sources.s TO dex@192.168.100.42 IDENTIFIED BY &＃39;xiaojun&＃39;;
SHOW GRANTS FOR dex;

mysql> GRANT ALL PRIVILEGES ON sources.s TO dex IDENTIFIED BY &＃39;xiaojun&＃39;;
Query OK, 0 rows affected (0.03 sec)

mysql> GRANT ALL PRIVILEGES ON sources.s TO dex@192.168.100.42 IDENTIFIED BY &＃39;xiaojun&＃39;;
Query OK, 0 rows affected (0.00 sec)

mysql> SHOW GRANTS FOR dex;
+----------------------------------------------------------------------------------------------------+
| Grants for dex@% |
+----------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO &＃39;dex&＃39;@&＃39;%&＃39; IDENTIFIED BY PASSWORD &＃39;*8FDE30312222738F1CD8AC8AF0EE515A9DB8180E&＃39; |
| GRANT ALL PRIVILEGES ON `sources`.`s` TO &＃39;dex&＃39;@&＃39;%&＃39; |
+----------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)

4. 查看target端是否安装了FEDERATED存储引擎

mysql> mysql> show engines ;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| CSV | YES | CSV storage engine | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)

看到没有安装federated存储引擎（目标端可以是任何的存储引擎比如说myisam或者innodb）

4.1 先来安装federated存储引擎

install plugin federated soname &＃39;ha_federated.so&＃39;;

mysql> install plugin federated soname &＃39;ha_federated.so&＃39;;
ERROR 1125 (HY000): Function &＃39;federated&＃39; already exists

已经安装好了，只是没有启用

测试一下是否可以

[root@rhel6Mysql02 ~]# mysqld_safe --federated &
[1] 2194
[root@rhel6Mysql02 ~]# 130620 18:12:28 mysqld_safe Logging to &＃39;/var/lib/mysql/rhel6Mysql02.err&＃39;.
130620 18:12:28 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

mysql> show engines ;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| CSV | YES | CSV storage engine | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| FEDERATED | YES | Federated MySQL storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)

好的修改一下my.conf文件

federated

重启一下mysql server
service mysql restart

恩，已经支持了。
mysql> show engines ;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| CSV | YES | CSV storage engine | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| FEDERATED | YES | Federated MySQL storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)

5. 在target端定义基于federated存储引擎的表links

CREATE TABLE `links` (
`Host` char(60) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT &＃39;&＃39;,
`User` char(16) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT &＃39;&＃39;,
`Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT &＃39;&＃39;,
`Select_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Insert_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Update_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Delete_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Drop_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Reload_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Shutdown_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Process_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`File_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Grant_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`References_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Index_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Alter_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Show_db_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Super_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_tmp_table_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Lock_tables_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Execute_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Repl_slave_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Repl_client_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_view_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Show_view_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_routine_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Alter_routine_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_user_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Event_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Trigger_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`Create_tablespace_priv` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;,
`ssl_type` enum(&＃39;&＃39;,&＃39;ANY&＃39;,&＃39;X509&＃39;,&＃39;SPECIFIED&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;&＃39;,
`ssl_cipher` blob NOT NULL,
`x509_issuer` blob NOT NULL,
`x509_subject` blob NOT NULL,
`max_questions` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`max_updates` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`max_connections` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`max_user_connections` int(11) unsigned NOT NULL DEFAULT &＃39;0&＃39;,
`plugin` char(64) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT &＃39;&＃39;,
`authentication_string` text CHARACTER SET utf8 COLLATE utf8_bin,
`password_expired` enum(&＃39;N&＃39;,&＃39;Y&＃39;) CHARACTER SET utf8 NOT NULL DEFAULT &＃39;N&＃39;
)
ENGINE=FEDERATED
DEFAULT CHARSET=latin1
COnNECTION=&＃39;mysql://dex:xiaojun@192.168.100.41:3306/sources/s&＃39;;



Query OK, 0 rows affected (1.10 sec)

mysql> select count(*) from links;
+----------+
| count(*) |
+----------+
| 12 |
+----------+
1 row in set (0.00 sec) bitsCN.com
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