On 2021-Jul-08, Boris Kolpackov wrote: > Alvaro Herrera <alvaro.herr...@2ndquadrant.com> writes: > > > Hmm ... aren't you trying to read more results than you sent queries? > > Hm, but should I be able to? Or, to put another way, should PQisBusy() > indicate there is a result available without me sending a query for it? > That sounds very counter-intuitive to me.
That seems a fair complaint, but I think PQisBusy is doing the right thing per its charter. It is documented as "would PQgetResult block?" and it is returning correctly that PQgetResult would not block in that situation, because no queries are pending. I think we would regret changing PQisBusy in the way you suggest. I think your expectation is that we would have an entry point for easy iteration; a way to say "if there's a result set to be had, can I have it please, otherwise I'm done iterating". That seems a reasonable ask, but PQisBusy is not that. Maybe it would be PQisResultPending() or something like that. I again have to ask the RMT what do they think of adding such a thing to libpq this late in the cycle. -- Álvaro Herrera 39°49'30"S 73°17'W — https://www.EnterpriseDB.com/
