Tim Hart <tjhart@mac.com> writes:
> Would it be worth the effort to add to and/or modify the libpq API so
> that multiple selects could be sent to the server in a single request
> and response?
You can do it already. See PQsendQuery and PQgetResult.
http://www.ca.postgresql.org/users-lounge/docs/7.3/postgres/libpq-async.html
mentions this specifically:
PQexec can return only one PGresult structure. If the submitted command string contains multiple SQL
commands,all but the last PGresult are discarded by PQexec.
There is a lot of other cruft here to allow nonblocking interaction with
the server, but if all you care about is multiple commands sent in a
single string, you only need
PQsendQuery(...);while ((res = PQgetResult(...))){ process result; PQclear(res);}
regards, tom lane