On Sun, Feb 24, 2019 at 5:03 PM Alexander Korotkov
<a.korotkov@postgrespro.ru> wrote:
> On Wed, Jan 30, 2019 at 5:28 AM Andres Freund <andres@anarazel.de> wrote:
> > Why -CF, and why is -p repeated?
>
> BTW, for our SQL grammar we have
>
> > scan.c: FLEXFLAGS = -CF -p -p
>
> Is it kind of default?
I just saw this in the committed patch. This is not default, it's
chosen for maximum performance at the expense of binary/memory size.
That's fine, but with a little effort you can also make the scanner
non-backtracking for additional performance, as in the attached.
--
John Naylor https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services