reset! (ActiveRecord::ConnectionAdapters::MysqlAdapter)

    # File lib/active_record/connection_adapters/mysql_adapter.rb, line 290
          def reset!
            if @connection.respond_to?(:change_user)
              # See http://bugs.mysql.com/bug.php?id=33540 -- the workaround way to
              # reset the connection is to change the user to the same user.
              @connection.change_user(@config[:username], @config[:password], @config[:database])
              configure_connection
            end
          end