| From: | Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com> |
|---|---|
| To: | Vik Fearing <vik(at)postgresfriends(dot)org> |
| Cc: | Ryan Lambert <ryan(at)rustprooflabs(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Surafel Temesgen <surafel3000(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Rémi Lapeyre <remi(dot)lapeyre(at)lenstra(dot)fr>, Eli Marmor <eli(at)netmask(dot)it>, David Steele <david(at)pgmasters(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Georgios <gkokolatos(at)protonmail(dot)com> |
| Subject: | Re: WIP: System Versioned Temporal Table |
| Date: | 2021-01-26 13:26:06 |
| Message-ID: | CANbhV-HGL6V3EiCZzR1GtCQxfOZiO7CC6hbSn+_ZqBCYDBkikw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jan 26, 2021 at 12:51 PM Vik Fearing <vik(at)postgresfriends(dot)org> wrote:
>
> On 1/26/21 1:16 PM, Simon Riggs wrote:
> > On Tue, Jan 26, 2021 at 11:33 AM Vik Fearing <vik(at)postgresfriends(dot)org> wrote:
> >>
> >> On 1/11/21 3:02 PM, Simon Riggs wrote:
> >>> * UPDATE foo SET start_timestamp = DEFAULT should fail but currently doesn't
> >>
> >> I'm still in the weeds of reviewing this patch, but why should this
> >> fail? It should not fail.
> >
> > It should not be possible for the user to change the start or end
> > timestamp of a system_time time range, by definition.
>
> Correct, but setting it to DEFAULT is not changing it.
>
> See also SQL:2016 11.5 <default clause> General Rule 3.a.
Thanks for pointing this out. Identity columns don't currently work that way.
--
Simon Riggs http://www.EnterpriseDB.com/
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