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.
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) 2013-2016 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 .