Re: limit-offset different result sets with same query

On Sat, May 09, 2009 at 01:28:03PM -0400, Tom Lane wrote:
> Merlin Moncure <mmoncure@gmail.com> writes:
> > On Fri, May 8, 2009 at 5:40 PM, Alvaro Herrera
> > <alvherre@commandprompt.com> wrote:
> >> Yeah, we went over this on the spanish list, turned out that I
> >> couldn't remember about syncscan :-)
>
> > I like the new behavior.  It really encourages proper use of order
> > by, because the natural ordering results are effectively
> > randomized.  A class of subtle bugs has been made obvious.  :)
>
> Not really, because the syncscan behavior only kicks in when your
> table gets large ... you'll never see it during devel testing on toy
> tables ...

Good point.  It's important not to test only on toy-sized tables for
lots and lots of good reasons, scale-dependence of sync scans being a
small one.

Cheers,
David.
--
David Fetter <david@fetter.org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
Skype: davidfetter      XMPP: david.fetter@gmail.com

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