Re: compute_query_id and pg_stat_statements

At Wed, 12 May 2021 17:30:26 +0800, Julien Rouhaud <rjuju123@gmail.com> wrote in 
> On Wed, May 12, 2021 at 10:57:25AM +0200, Pavel Stehule wrote:
> > 
> > My second proposal can work for your example too. pg_stat_statements have
> > to require any active queryid computing. And when it is not available, then
> > the exception should be raised.
> > 
> > The custom queryid can return null, and still the queryid will be computed.
> > Maybe the warning can be enough. Just, if somebody use pg_stat_statements
> > function, then enforce the check if queryid is computed (compute_query_id
> > is true || some hook is not null), and if not then raise a warning.
> 
> Ah I'm sorry I misunderstood your proposal.  Yes, definitely adding a warning
> or an error when executing pg_stat_statements() SRF would help, that's a great
> idea!
> 
> I'll wait a bit in case someone has any objection, and if not send an updated
> patch!

Isn't there a case where pg_stat_statements uses an alternative
query-id provider?

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center