Re: BUG #18240: Undefined behaviour in cash_mul_flt8() and friends

On Tue, Dec 12, 2023 at 10:03:43AM +0100, Michael Paquier wrote:
> On Mon, Dec 11, 2023 at 10:05:53AM -0500, Tom Lane wrote:
> > Yeah, approximately none of cash.c pays any attention to the risks
> > of overflow/underflow.  Improving that situation would be a good
> > finger exercise for some aspiring hacker, perhaps.  Although I bet
> > somebody will ask again why it is that we continue to support the
> > money type.
> 
> AFAIK, we discourage the use of money in the wiki for quite a few
> years:
> https://wiki.postgresql.org/wiki/Don%27t_Do_This#Don.27t_use_money
> 
> And numeric has much better code coverage and support.  I am wondering
> whether we've reached the point where it would be better to remove it
> entirely from the tree, and just tell people to use numeric.  This has
> a cost for upgrades, where we should cross check for its use but there
> is already check_for_data_type_usage() to do this job so the facility
> is there.

Yes, probably.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Only you can decide what is important to you.