>>> Note that a bitmap scan or multi-pass indexscan (OR clause scan) has NIL
>>> pathkeys since we can say nothing about the overall order of its result.
> Yeah, but it might come back someday, so I didn't feel a need to change
> that sentence...
Hmm. Our OR patch makes the same possibility by using Append node - without
reintroducing multi-pass indexscan. Moreover, it allows to sort OR clauses to
match sort order.
--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/