Re: [EXTERNAL]: Re: [EXTERNAL]: Re: UPSERT in Postgres

Hi karsten:

On Mon, 10 Apr 2023 at 11:40, Karsten Hilbert <Karsten.Hilbert@gmx.net> wrote:
>
> Am Mon, Apr 10, 2023 at 09:41:15AM +0200 schrieb Francisco Olarte:
>
> > On Mon, 10 Apr 2023 at 04:16, Rob Sargent <robjsargent@gmail.com> wrote:
> > > > An UPSERT checks whether a row exists, if so, it does an update, if not it does an insert. This is the literal
definition.
> > > This the part that's always eluded me: How does the client, the
> > > UPSERTer, come to hold an id and not know whether or not it's already in
> > > the database.
> >
> > This is extremely easy to do if you have natural instead of surrogate keys.
> >
> > I work in telephony, upserting the last incoming call timestamp for a
> > phone number will be exactly that.
>
> timezones ?
> DST ?

A timestamp is a point in the time line, this is what I insert, just a
real number marking a line, timezones and dst are presentation stuff.

> spoofing ?

¿ Of what ? I do it for a phone number, not for a customer, it does
not matter to me if the number came from a legit customer or from a
spoofer, I want it for the phone number.

Francisco Olarte.