The specific case that Tom complained about wasn't even in the latest
documentation sources anymore. I think the patch should be reverted.
Bruce Momjian writes:
>
> The following applied patch removes the section Tom thought wasn't
> needed anymore.
>
> ---------------------------------------------------------------------------
>
> Tom Lane wrote:
> > Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > > I can find no suitable replacement for this example. Can anyone else?
> >
> > > Peter Eisentraut wrote:
> > >> This example in User's Guide section 7.2 doesn't work anymore at all:
> > >>
> > >> tgl=> select @ text '-4.5' as "abs";
> >
> > Both of the examples in this section have been obsoleted by our recent
> > elimination of a lot of implicit casts. This one would still work if
> > text-to-float8 were an implicit cast, but it's not anymore. Also,
> > though the second one still acts as described, the reason given for it
> > in the text is wrong: the system is not unable to choose among multiple
> > alternatives. Rather, it finds *no* alternatives, again because the
> > text-to-various-int-types casts are no longer implicit.
> >
> > The closest similar cases that I can find for the first example are not
> > good replacements because they are also slated for destruction :-(.
> > Basically, I see us moving away from the preferred-type mechanism, and
> > perhaps eliminating it entirely soon.
> >
> > I'd just remove the whole of Example 7.3, I think. The mechanisms are
> > still there, for now, but they are not invoked in any standard cases.
> >
> > regards, tom lane
> >
>
>
--
Peter Eisentraut peter_e@gmx.net
