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(at)gmail(dot)com> writes:
> > On Fri, May 8, 2009 at 5:40 PM, Alvaro Herrera
> > <alvherre(at)commandprompt(dot)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(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
Skype: davidfetter XMPP: david(dot)fetter(at)gmail(dot)com

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