Re: LIMIT Optimization

Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > So it forces our LIMIT optimization, without limiting the number of rows
> > returned.  That seems to be of questionable value.  The only value I can
> > see for it is for CURSOR queries but I don't think we can start
> > returning rows from even a cursor until the entire query is done
> > executing.
> 
> Not so at all.  However, CURSORs are already optimized on the assumption
> that not all the rows will actually get fetched.

So, it is only valuable for cursors or can we return results before the
entire query finishes for non-cursors.  The "No so at all" part has me
confused.

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