# File lib/tapkit/access/sql.rb, line 232
                def join_expression
                        if @aliases.size == 1 then
                                return
                        end

                        @join_entities.each do |entity|
                                name    = entity[0].name
                                another = entity[1]
                                path    = @aliases.index another
                                if relationship = @join_relationships[path] then
                                        relationship.joins.each do |join|
                                                _join_expression(relationship, join)
                                        end
                                end
                        end
                end