# File lib/dm-migrations/adapters/dm-postgres-adapter.rb, line 145
        def type_map
          precision = Property::Numeric::DEFAULT_PRECISION
          scale     = Property::Decimal::DEFAULT_SCALE

          @type_map ||= super.merge(
            Property::Binary => { :primitive => 'BYTEA'                                                      },
            BigDecimal       => { :primitive => 'NUMERIC',          :precision => precision, :scale => scale },
            Float            => { :primitive => 'DOUBLE PRECISION'                                           }
          ).freeze
        end