create_table!

# File activerecord/lib/active_record/session_store.rb, line 65
      def create_table!
        connection.create_table(table_name) do |t|
          t.string session_id_column, :limit => 255
          t.text data_column_name
        end
        connection.add_index table_name, session_id_column, :unique => true
      end