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Re: newbie libpq question...

From: "D'Arcy J(dot)M(dot) Cain" <darcy(at)druid(dot)net>
To: Doug Homoelle <homoelle(at)ll(dot)mit(dot)edu>
Cc: pgsql-interfaces(at)postgresql(dot)org
Subject: Re: newbie libpq question...
Date: 2004-11-08 23:21:55
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Lists: pgsql-interfaces
On Mon, 08 Nov 2004 17:36:09 -0500
Doug Homoelle <homoelle(at)ll(dot)mit(dot)edu> wrote:
> I'm trying to use the libpq library for the first time and I'm
> experiencing what seems to be a very basic problem.  When I run the
> following:
>         res = PQexec(conn, "select blah blah blah");
>         test_int=PQntuples(res);
>         fprintf(stdout,"number of rows: %f\n",test_int);
>         test_int=PQnfields(res);
>         fprintf(stdout,"number of cols: %f\n",test_int);
> where "blah blah blah" is the selection criteria, I get zero rows and

I think you need "number of cols: %d\n" there.  Those functions returns

D'Arcy J.M. Cain <darcy(at)druid(dot)net>         |  Democracy is three wolves                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


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