mysql使用federated实现dblink远程表访问_MySQL
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 '',
`User` char(16) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
`Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '',
`Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Reload_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Shutdown_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Process_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`File_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_db_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Super_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Repl_slave_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Repl_client_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_user_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Event_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tablespace_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`ssl_type` enum('','ANY','X509','SPECIFIED') CHARACTER SET utf8 NOT NULL DEFAULT '',
`ssl_cipher` blob NOT NULL,
`x509_issuer` blob NOT NULL,
`x509_subject` blob NOT NULL,
`max_questions` int(11) unsigned NOT NULL DEFAULT '0',
`max_updates` int(11) unsigned NOT NULL DEFAULT '0',
`max_connections` int(11) unsigned NOT NULL DEFAULT '0',
`max_user_connections` int(11) unsigned NOT NULL DEFAULT '0',
`plugin` char(64) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT '',
`authentication_string` text CHARACTER SET utf8 COLLATE utf8_bin,
`password_expired` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N'
) 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 'xiaojun';
GRANT ALL PRIVILEGES ON sources.s TO dex@192.168.100.42 IDENTIFIED BY 'xiaojun';
SHOW GRANTS FOR dex;
mysql> GRANT ALL PRIVILEGES ON sources.s TO dex IDENTIFIED BY 'xiaojun';
Query OK, 0 rows affected (0.03 sec)
mysql> GRANT ALL PRIVILEGES ON sources.s TO dex@192.168.100.42 IDENTIFIED BY 'xiaojun';
Query OK, 0 rows affected (0.00 sec)
mysql> SHOW GRANTS FOR dex;
+----------------------------------------------------------------------------------------------------+
| Grants for dex@% |
+----------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'dex'@'%' IDENTIFIED BY PASSWORD '*8FDE30312222738F1CD8AC8AF0EE515A9DB8180E' |
| GRANT ALL PRIVILEGES ON `sources`.`s` TO 'dex'@'%' |
+----------------------------------------------------------------------------------------------------+
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 'ha_federated.so';
mysql> install plugin federated soname 'ha_federated.so';
ERROR 1125 (HY000): Function 'federated' 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 '/var/lib/mysql/rhel6Mysql02.err'.
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 '',
`User` char(16) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
`Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '',
`Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Reload_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Shutdown_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Process_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`File_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_db_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Super_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Repl_slave_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Repl_client_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_user_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Event_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tablespace_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`ssl_type` enum('','ANY','X509','SPECIFIED') CHARACTER SET utf8 NOT NULL DEFAULT '',
`ssl_cipher` blob NOT NULL,
`x509_issuer` blob NOT NULL,
`x509_subject` blob NOT NULL,
`max_questions` int(11) unsigned NOT NULL DEFAULT '0',
`max_updates` int(11) unsigned NOT NULL DEFAULT '0',
`max_connections` int(11) unsigned NOT NULL DEFAULT '0',
`max_user_connections` int(11) unsigned NOT NULL DEFAULT '0',
`plugin` char(64) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT '',
`authentication_string` text CHARACTER SET utf8 COLLATE utf8_bin,
`password_expired` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N'
)
ENGINE=FEDERATED
DEFAULT CHARSET=latin1
CONNECTION='mysql://dex:xiaojun@192.168.100.41:3306/sources/s';
Query OK, 0 rows affected (1.10 sec)
mysql> select count(*) from links;
+----------+
| count(*) |
+----------+
| 12 |
+----------+
1 row in set (0.00 sec) bitsCN.com
熱AI工具
Undresser.AI Undress
人工智慧驅動的應用程序，用於創建逼真的裸體照片
AI Clothes Remover
用於從照片中去除衣服的線上人工智慧工具。
Undress AI Tool
免費脫衣圖片
Clothoff.io
AI脫衣器
AI Hentai Generator
免費產生 AI 無盡。
熱門文章
熱工具
記事本++7.3.1
好用且免費的程式碼編輯器
SublimeText3漢化版
中文版，非常好用
禪工作室 13.0.1
強大的PHP整合開發環境
Dreamweaver CS6
視覺化網頁開發工具
SublimeText3 Mac版
神級程式碼編輯軟體(SublimeText3)
熱門話題
mysql用戶和數據庫的關係
Apr 08, 2025 pm 07:15 PM
MySQL 數據庫中，用戶和數據庫的關係通過權限和表定義。用戶擁有用戶名和密碼，用於訪問數據庫。權限通過 GRANT 命令授予，而表由 CREATE TABLE 命令創建。要建立用戶和數據庫之間的關係，需創建數據庫、創建用戶，然後授予權限。
MySQL：初學者的數據管理易用性
Apr 09, 2025 am 12:07 AM
MySQL適合初學者使用，因為它安裝簡單、功能強大且易於管理數據。 1.安裝和配置簡單，適用於多種操作系統。 2.支持基本操作如創建數據庫和表、插入、查詢、更新和刪除數據。 3.提供高級功能如JOIN操作和子查詢。 4.可以通過索引、查詢優化和分錶分區來提升性能。 5.支持備份、恢復和安全措施，確保數據的安全和一致性。
忘記數據庫密碼，能在Navicat中找回嗎？
Apr 08, 2025 pm 09:51 PM
Navicat本身不存儲數據庫密碼，只能找回加密後的密碼。解決辦法：1. 檢查密碼管理器；2. 檢查Navicat的“記住密碼”功能；3. 重置數據庫密碼；4. 聯繫數據庫管理員。
MySQL 中的查詢優化對於提高數據庫性能至關重要，尤其是在處理大型數據集時
Apr 08, 2025 pm 07:12 PM
1.使用正確的索引索引通過減少掃描的數據量來加速數據檢索select*fromemployeeswherelast_name='smith';如果多次查詢表的某一列，則為該列創建索引如果您或您的應用根據條件需要來自多個列的數據，則創建複合索引2.避免選擇*僅選擇那些需要的列，如果您選擇所有不需要的列，這只會消耗更多的服務器內存並導致服務器在高負載或頻率時間下變慢例如，您的表包含諸如created_at和updated_at以及時間戳之類的列，然後避免選擇*，因為它們在正常情況下不需要低效查詢se
navicat premium怎麼創建
Apr 09, 2025 am 07:09 AM
使用 Navicat Premium 創建數據庫：連接到數據庫服務器並輸入連接參數。右鍵單擊服務器並選擇“創建數據庫”。輸入新數據庫的名稱和指定字符集和排序規則。連接到新數據庫並在“對象瀏覽器”中創建表。右鍵單擊表並選擇“插入數據”來插入數據。
mysql怎麼查看
Apr 08, 2025 pm 07:21 PM
通過以下命令查看 MySQL 數據庫：連接到服務器：mysql -u 用戶名 -p 密碼運行 SHOW DATABASES; 命令獲取所有現有數據庫選擇數據庫：USE 數據庫名;查看表：SHOW TABLES;查看表結構：DESCRIBE 表名;查看數據：SELECT * FROM 表名;
mysql怎麼複製表
Apr 08, 2025 pm 07:24 PM
在 MySQL 中復製表需要創建新表、插入數據、設置外鍵、複製索引、觸發器、存儲過程和函數。具體步驟包括：創建具有相同結構的新表。將數據從原始表插入新表。設置相同的外鍵約束（如果原始表有）。創建相同索引。創建相同觸發器（如果原始表有）。創建相同存儲過程或函數（如果原始表使用了）。
Navicat for MariaDB如何查看數據庫密碼？
Apr 08, 2025 pm 09:18 PM
Navicat for MariaDB 無法直接查看數據庫密碼，因為密碼以加密形式存儲。為確保數據庫安全，有三個方法可重置密碼：通過 Navicat 重置密碼，設置複雜密碼。查看配置文件（不推薦，風險高）。使用系統命令行工具（不推薦，需要對命令行工具精通）。
