extract_bounds

# File activerecord/lib/active_record/connection_adapters/postgresql/oid.rb, line 109
          def extract_bounds(value)
            from, to = value[1..-2].split(',')
            {
              from:          (value[1] == ',' || from == '-infinity') ? infinity(:negative => true) : from,
              to:            (value[-2] == ',' || to == 'infinity') ? infinity : to,
              exclude_start: (value[0] == '('),
              exclude_end:   (value[-1] == ')')
            }
          end