# File lib/active_record/connection_adapters/abstract_adapter.rb, line 392
      def add_column(table_name, column_name, type, options = {})
        native_type = native_database_types[type]
        add_column_sql = "ALTER TABLE #{table_name} ADD #{column_name} #{type_to_sql(type, options[:limit])}"
        add_column_options!(add_column_sql, options)
        execute(add_column_sql)
      end