add

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 325
      def add(connection, table_name)
        if data_source_exists?(connection, table_name)
          primary_keys(connection, table_name)
          columns(connection, table_name)
          columns_hash(connection, table_name)
          indexes(connection, table_name)
        end
      end