instance method save

# File activerecord/lib/active_record/session_store.rb, line 262
      def save
        return false unless loaded?
        marshaled_data = self.class.marshal(data)
        connect        = connection

        if @new_record
          @new_record = false
          connect.update <<-end_sql, 'Create session'
            INSERT INTO #{table_name} (
              #{connect.quote_column_name(session_id_column)},
              #{connect.quote_column_name(data_column)} )
            VALUES (
              #{connect.quote(session_id)},
              #{connect.quote(marshaled_data)} )
          end_sql
        else
          connect.update <<-end_sql, 'Update session'
            UPDATE #{table_name}
            SET #{connect.quote_column_name(data_column)}=#{connect.quote(marshaled_data)}
            WHERE #{connect.quote_column_name(session_id_column)}=#{connect.quote(session_id)}
          end_sql
        end
      end