On Tue, 29 Jun 2021 at 21:34, Robert Haas <robertmhaas@gmail.com> wrote:
>
> I thought about this too, but
> http://postgr.es/m/774767.1591985683@sss.pgh.pa.us made me think that
> it would be an on-disk format break. Maybe it's not, though?
>
No, because the numeric dscale remains non-negative, so there's no
change to the way numeric values are stored. The only change is to
extend the allowed scale in the numeric typemod.
Regards,
Dean
