type_to_sql(type, limit = nil, precision = nil, scale = nil) public

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# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1045
      def type_to_sql(type, limit = nil, precision = nil, scale = nil) #:nodoc:
        if native = native_database_types[type.to_sym]
          column_type_sql = (native.is_a?(Hash) ? native[:name] : native).dup

          if type == :decimal # ignore limit, use precision and scale
            scale ||= native[:scale]

            if precision ||= native[:precision]
              if scale
                column_type_sql << "(#{precision},#{scale})"
              else
                column_type_sql << "(#{precision})"
              end
            elsif scale
              raise ArgumentError, "Error adding decimal column: precision cannot be empty if scale is specified"
            end

          elsif [:datetime, :time].include?(type) && precision ||= native[:precision]
            if (0..6) === precision
              column_type_sql << "(#{precision})"
            else
              raise(ActiveRecordError, "No #{native[:name]} type has precision of #{precision}. The allowed range of precision is from 0 to 6")
            end
          elsif (type != :primary_key) && (limit ||= native.is_a?(Hash) && native[:limit])
            column_type_sql << "(#{limit})"
          end

          column_type_sql
        else
          type.to_s
        end
      end
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