Re: [BUGFIX] amcanbackward is not checked before building backward index paths

On Thu, May 17, 2018 at 8:46 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> writes:
> > I'll fix the docs accordingly. I'm referring specifically to this bit:
> > https://www.postgresql.org/docs/current/static/functions-
> info.html#FUNCTIONS-INFO-INDEX-PROPS
> > which I think should say "Can the scan direction be changed in
> > mid-scan?" in place of the current text (unless anyone has better
> > wording?)
>
> Maybe "Can the scan direction be reversed in mid-scan?". I'm not
> absolutely sure that that's better ...
>

​A cursory read might conclude that "reversing" can only happen once while
they will likely understand that "changing" can happen multiple times.
This is minor point - the two are effectively the same.

Maybe: "Supports both FETCH FORWARD and FETCH BACKWARD during the same scan"

Or:

"Supports SCROLL(able) WITHOUT HOLD cursors"

David J.