"Gregor Roessle" <g(dot)roessle(at)osram(dot)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