inspect

# File activerecord/lib/active_record/connection_adapters/abstract_adapter.rb, line 178
      def inspect # :nodoc:
        name_field = " name=#{pool.db_config.name.inspect}" unless pool.db_config.name == "primary"
        shard_field = " shard=#{shard.inspect}" unless shard == :default

        "#<#{self.class.name}:#{'%#016x' % (object_id << 1)} env_name=#{pool.db_config.env_name.inspect}#{name_field} role=#{role.inspect}#{shard_field}>"
      end