-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Il 11/02/2013 22:39, Tom Lane ha scritto: > Manlio Perillo <manlio.peri...@gmail.com> writes: >> What is the reason why PQsendPrepare function does not send a >> Describe Portal message? > > That would add a round trip, no? >
Well, no. An extra round trip is required with current implementation, since I need to call PQsendPrepare, wait for server response, call PQsendDescribePrepared, wait for server response. >> Sending a Describe Portal message, make it possible for PQsendPrepare >> function to *return* a PGresult with more useful informations, instead >> of just the result status. > > That's *definitely* wrong, because the entire point of the PQsend > functions is they don't wait for a server response. > The PQsendQueryParams sends the following protocol messages: * Parse * Bind * Describe Portal * Execute * Sync and of course does not wait for each response, since this is done in the state machine. I noted that PQsendQueryParams sends a Describe Portal message, and I found it strange that the same is not done by PQsendPrepare. I wrote the patch to check if this was done due to some technical reason, but this seems to not be the case. > regards, tom lane Regards Manlio Perillo -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlEaLvkACgkQscQJ24LbaUSBgACgjASGXyTl+rpHWGAGk5nm7Fnj T68Anin9iEfbLw75ObHJxU6yfIazEZDS =ZmPu -----END PGP SIGNATURE----- -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
