K C Lau wrote:
> I'm wondering if this performance issue is common enough for other users
> to merit a fix in pg, especially as it seems that with MVCC, each of the
> data records need to be accessed in addition to scanning the index.
>
Yes - there are certainly cases where index only access (or something
similar, like b+tree tables) would be highly desirable.
From what I have understood from previous discussions, there are
difficulties involved with producing a design that does not cause new
problems...
regards
Mark