reset_pk_sequence!

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 251
      def reset_pk_sequence!(table, pk = nil, sequence = nil)
        unless pk and sequence
          default_pk, default_sequence = pk_and_sequence_for(table)
          pk ||= default_pk
          sequence ||= default_sequence
        end
        if pk
          if sequence
            select_value "SELECT setval('\#{sequence}', (SELECT COALESCE(MAX(\#{pk})+(SELECT increment_by FROM \#{sequence}), (SELECT min_value FROM \#{sequence})) FROM \#{table}), false)\n", 'Reset sequence'
          else
            @logger.warn "#{table} has primary key #{pk} with no default sequence" if @logger
          end
        end
      end