Re: Nested window functions not permitted - Mailing list pgsql-general

On Sun, 2015-11-08 at 17:50 -0500, Tom Lane wrote:
> Oliver Elphick <olly@lfix.co.uk> writes:
> > I tried to do this:
> > SELECT     p.company, p.start, p.yearend, p.idnum,
> >            s.pdno, s.pdend,
> >            CASE WHEN nth_value(s.pdend,(row_number() OVER w)::INTEGER -1) OVER w IS NULL
> >                 THEN p.start
> >                 ELSE nth_value(s.pdend,(row_number() OVER w)::INTEGER -1) + '1 day'::INTERVAL
>
> Um, don't you just want lead() or lag()?
>
>             regards, tom lane

So I do!  Thanks.