Tomonari Katsumata <katsumata(dot)tomonari(at)po(dot)ntts(dot)co(dot)jp> writes:
> Thank you for explanation about it.
> I've understood that it is intended thing.
> Sorry to bother you.
No, actually it's a good thing you brought it up, because we're now
reconsidering whether that patch was a good idea or not ...
http://archives.postgresql.org/pgsql-hackers/2012-06/msg00160.php
regards, tom lane