Alvaro Herrera <alvaro.herrera@2ndquadrant.com> writes:
> IIUC the problem is that PQgetResult is indeed not prepared to deal with
> a result the first time until after the queue has been "prepared", and
> this happens on calling PQpipelineSync. But I think the formulation in
> the attached patch works too, and the resulting code is less surprising.
>
> I wrote a test case that works as you describe, and indeed with the
> original code it gets a NULL initially; that disappears with the
> attached patch. Can you give it a try?
Yes, I can confirm this appears to have addressed the first issue,
thanks! The second issue [1], however, is still there even with
this patch.
[1] https://www.postgresql.org/message-id/boris.20210624103805%40codesynthesis.com