Re: BUG #3824: Query hangs when result set empty using sort and limit

"Gregor Roessle" <g.roessle@osram.de> writes:
> The Server hangs when executing a query like this:

> select * from messwerte where pknr = 28315178 and isproducing = 't' order by
> timestamp desc limit 1;

I seriously doubt that it's hung.  Takes a long time, maybe so.  Is it
trying to use an indexscan on timestamp to substitute for a sort step?

            regards, tom lane