Re: Issues with generate_series using integer boundaries

On Mon, Jan 31, 2011 at 7:36 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:

> Thom Brown <thom@linux.com> writes:
> > Actually, those lower bound errors aren't related to generate_series,
> > but I'd still like to know why -2147483648::int4 is out of range.
>
> :: binds tighter than - (and everything else too).  Write
> (-2147483648)::int4 instead.
>

That's surprising enough that it might be worth generating a warning if the
typecasting operator is used on a mathmatical expression--"a -
b::int4"--rather than a single value (eg. "(a - b)::int4" or "f()::int4").
I don't know the grammar to know if that fits.

-- 
Glenn Maynard