/*
* call-seq:
* res.num_tuples()
*
* Returns the number of tuples (rows) in the query result.
*
* Similar to <tt>res.result.length</tt> (but faster).
*/
static VALUE
pgresult_num_tuples(obj)
VALUE obj;
{
int n;
n = PQntuples(get_pgresult(obj));
return INT2NUM(n);
}