# File lib/tapkit/access/adapters/openbase.rb, line 562
                def assemble_join( left, right, semantic )
                        case semantic
                        when Relationship::INNER_JOIN
                                op = '='
                        when Relationship::LEFT_OUTER_JOIN
                                op = '*'
                        else
                                raise "OpenBase adapter supports inner join or left outer join."
                        end

                        "#{left} #{op} #{right}"
                end