On 2021-Jun-23, Boris Kolpackov wrote: > If, however, I execute it by checking for results before sending the > next INSERT, I get the following call sequence: > > PQsendQueryPrepared() # INSERT #1 > PQflush() > PQsendQueryPrepared() # INSERT #2 > PQflush() > ... > PQsendQueryPrepared() # INSERT #~400 > PQflush() > PQconsumeInput() # At this point select() indicates we can read. > PQgetResult() # NULL (???) > PQgetResult() # INSERT #1 > PQgetResult() # NULL > PQgetResult() # INSERT #2 > PQgetResult() # NULL > ... > > > What's strange here is that the first PQgetResult() call (marked with ???) > returns NULL instead of result for INSERT #1 as in the first call sequence. > Interestingly, if I skip it, the rest seems to progress as expected.
Yeah, I agree that there's a problem in the libpq state machine. I'm looking into it now. -- Álvaro Herrera 39°49'30"S 73°17'W
