MySQL Connector/J is the official JDBC driver for MySQL.
It is a native Java driver that converts JDBC (Java Database Connectivity) calls into the network protocol used by the MySQL database.
For more information see http://dev.mysql.com/usingmysql/java/
To make the driver accessible to JDBC and ActiveRecord code running in JRuby :
require 'jdbc/mysql' ::.
For backwards compatibility with older (<= 5.1.13) versions of the gem use :
require 'jdbc/mysql' ::.(:require) if ::.respond_to?(:load_driver)
Copyright (c) 2013-2014 The JRuby Team.
MySQL open source software is provided under the GPL (2.0) License, see LICENSE.txt and http://www.gnu.org/licenses/old-licenses/gpl-2.0.html .