# File lib/active_record/base.rb, line 771
      def reset_column_information
        connection.clear_cache!
        undefine_attribute_methods
        connection_pool.clear_table_cache!(table_name) if table_exists?

        @column_names = @content_columns = @dynamic_methods_hash = @inheritance_column = nil
        @arel_engine = @relation = nil
      end