Re: libpq and multiple selects in a single query

Tim Hart <tjhart(at)mac(dot)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