Arel::Externalization

   # File lib/arel/algebra/relations/utilities/externalization.rb, line 5
5:     def == other
6:       super || Externalization === other && relation == other.relation
7:     end

    # File lib/arel/algebra/relations/utilities/externalization.rb, line 13
13:     def attributes
14:       @attributes ||= Header.new(relation.attributes.map { |a| a.to_attribute(self) })
15:     end

    # File lib/arel/algebra/relations/utilities/externalization.rb, line 22
22:     def name
23:       relation.name + '_external'
24:     end

    # File lib/arel/algebra/relations/utilities/externalization.rb, line 17
17:     def table_sql(formatter = Sql::TableReference.new(relation))
18:       formatter.select relation.compiler.select_sql, self
19:     end

    # File lib/arel/algebra/relations/utilities/externalization.rb, line 9
 9:     def wheres
10:       []
11:     end