Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0

On 2015-05-01 10:06:42 -0400, Robert Haas wrote:
> On Fri, May 1, 2015 at 9:58 AM, Andres Freund <andres@anarazel.de> wrote:
> > would you rather have EXCLUDED.data refer to the tuple version from
> > VALUES (or a SELECT or ...) or to version from the BEFORE trigger?
> 
> I think it would be completely shocking if it didn't refer to the
> version returned by the BEFORE trigger.  My interpretation of the
> semantics of BEFORE triggers is that, once the trigger has fired and
> returned a new tuple, things should proceed just as if that new tuple
> were the one originally provided by the user.

Well, it's a BEFORE INSERT trigger, not a BEFORE UPDATE, that's why I'm
not so sure that argument applies.

Peter also leaned in "your" direction and you apparently have a strong
opinion on it... So I guess that'll be it unless somebody else weighs
in.

Greetings,

Andres Freund