# File lib/active_record/base.rb, line 983
      def update_counters(id, counters)
        updates = counters.map do |counter_name, value|
          operator = value < 0 ? '-' : '+'
          quoted_column = connection.quote_column_name(counter_name)
          "#{quoted_column} = COALESCE(#{quoted_column}, 0) #{operator} #{value.abs}"
        end

        update_all(updates.join(', '), primary_key => id )
      end