Re: compute_query_id and pg_stat_statements

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!