2008/12/27 Tom Lane :
> The last bit of performance-related hacking that seems to be needed in
> the window functions patch is to fix things so that we can trim old
> rows from the underlying tuplestore when they're no longer needed.
> In particular I think it's critical to be able to do this for t
The last bit of performance-related hacking that seems to be needed in
the window functions patch is to fix things so that we can trim old
rows from the underlying tuplestore when they're no longer needed.
In particular I think it's critical to be able to do this for the
simple cases of lead() and
