class Arel::Nodes::TableAlias

def [](name)
  relation.is_a?(Table) ? relation[name, self] : Attribute.new(self, name)
end

def able_to_type_cast?
  relation.respond_to?(:able_to_type_cast?) && relation.able_to_type_cast?
end

def table_name
  relation.respond_to?(:name) ? relation.name : name
end

def type_cast_for_database(attr_name, value)
  relation.type_cast_for_database(attr_name, value)
end

def type_for_attribute(name)
  relation.type_for_attribute(name)
end