default_sequence_name

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 239
      def default_sequence_name(table_name, pk = nil)
        default_pk, default_seq = pk_and_sequence_for(table_name)
        default_seq || "#{table_name}_#{pk || default_pk || 'id'}_seq"
      end