# File lib/dm-migrations/adapters/dm-oracle-adapter.rb, line 281
        def type_map
          length    = Property::String::DEFAULT_LENGTH
          precision = Property::Numeric::DEFAULT_PRECISION
          scale     = Property::Decimal::DEFAULT_SCALE

          @type_map ||= {
            Integer        => { :primitive => 'NUMBER',   :precision => precision, :scale => 0   },
            String         => { :primitive => 'VARCHAR2', :length => length                      },
            Class          => { :primitive => 'VARCHAR2', :length => length                      },
            BigDecimal     => { :primitive => 'NUMBER',   :precision => precision, :scale => nil },
            Float          => { :primitive => 'BINARY_FLOAT',                                    },
            DateTime       => { :primitive => 'DATE'                                             },
            Date           => { :primitive => 'DATE'                                             },
            Time           => { :primitive => 'DATE'                                             },
            TrueClass      => { :primitive => 'NUMBER',  :precision => 1, :scale => 0            },
            Property::Text => { :primitive => 'CLOB'                                             },
          }.freeze
        end