Marti Raudsepp <marti(at)juffo(dot)org> writes:
> According to this model, evaluating SELECT clause fields for *all*
> found rows is done in step 5, whereas LIMIT/OFFSET are only applied
> later at step 9. So we're already bending the rules here (in general
> we don't do such optimizations around volatile functions). The worst
> thing is that it's inconsistent -- the LIMIT gets applied when
> computing the SELECT list, but OFFSET doesn't.
On what grounds do you say that? LIMIT and OFFSET are practically the
same thing internally, and are certainly applied in the same way.
regards, tom lane