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  3. MySQL Federated - Wikipedia
MySQL Federated - Wikipedia
From Wikipedia, the free encyclopedia
MySQL Federated Storage Engine
Original authorsPatrick Galbraith, Brian Aker
Initial release2005
Operating systemLinux, Mac OS X, Unix; Windows
Platformx86, x86-64, SPARC, MIPS, PowerPC
Available inC/C++
TypeDatabase engine
LicenseGNU General Public License
Websitehttp://mysql.bkbits.net

Federated is a storage engine for the MySQL MariaDB relational database management system that allows creation of a table that is a local representation of a foreign (remote) table. It uses the MySQL client library API as a data transport, treating remote tables as if they were located on the local server. Each Federated table that is defined there is one .frm (data definition file containing information such as the URL of the data source). The actual data can exist on a local or remote MySQL instance.

To create a Federated table, one has to specify a URL in the "CONNECTION" string: 

create table t1 (
 a int,
 b varchar(32))
ENGINE=FEDERATED CONNECTION='mysql://user@hostname/test/t1'

The connection URL is in the format of: 

scheme://user:pass@host:port/schema/tablename

Upon creation of a Federated table, the user must ensure that the remote data source does indeed exist or an error will be issued.

The MySQL Federated Storage Engine was authored by Patrick Galbraith and Brian Aker and is currently being maintained by Patrick Galbraith and Antony Curtis. It was introduced in 2005 with MySQL 5.0.


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This database software-related article is a stub. You can help Wikipedia by adding missing information.

Sunting pranala
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