Re: [HACKERS] Solution for LIMIT cost estimation

Don Baccus wrote:
>
> At 03:32 PM 2/14/00 +1100, Chris Bitmead wrote:
>
> >I agree you should probably go the whole hog one way or the other. I
> >think
> >ignoring offset+limit is a useful option, but like I said at the
> >beginning, it doesn't bother me _that_ much.
>
> It should bother you that folks who understand how SQL works might
> be penalized in order to insulate the fact that those who don't know
> how SQL works from an understanding of their own ignorance...
>
> Shouldn't we be more concerned with folks who bother to read an
> SQL primer? Or Oracle or Informix docs on SQL?

LIMIT is not SQL, both as a technical fact, and philosophically
because it reaches outside of set theory. What LIMIT does without
ORDER BY is non-deterministic, and therefore a subjective matter of
what is the most useful: a faster answer, or a more consistant answer.
My predudices are caused by what I use PostgreSQL for, which is
more favourable to the latter.