> Without a WHERE you get the whole table.
>
> A Index-Scan is, in this case, expensive.
I know that, and I would agree if I wouldn't have asked for _ordered_
result, and wouldn't have turned enable_seqscan=off.
In these conditions I would have expected an index scan, even if it is
more expensive than the sequential scan + sort. Actually I wanted to see
how expensive it thinks it is, but I can't get to that plan at all.
Thanks,
Csaba.