new_column_definition

# File activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 555
      def new_column_definition(name, type, **options) # :nodoc:
        if integer_like_primary_key?(type, options)
          type = integer_like_primary_key_type(type, options)
        end
        type = aliased_types(type.to_s, type)

        if @conn.supports_datetime_with_precision?
          if type == :datetime && !options.key?(:precision)
            options[:precision] = 6
          end
        end

        options[:primary_key] ||= type == :primary_key
        options[:null] = false if options[:primary_key]
        create_column_definition(name, type, options)
      end