result_status (PGresult)

    /*
     * call-seq:
     *    res.result_status() -> Fixnum
     *
     * Returns the status of the query. The status value is one of:
     * * +PGRES_EMPTY_QUERY+
     * * +PGRES_COMMAND_OK+
     * * +PGRES_TUPLES_OK+
     * * +PGRES_COPY_OUT+
     * * +PGRES_COPY_IN+
     * * +PGRES_BAD_RESPONSE+
     * * +PGRES_NONFATAL_ERROR+
     * * +PGRES_FATAL_ERROR+
     */
    static VALUE
    pgresult_result_status(VALUE self)
    {
            return INT2FIX(PQresultStatus(get_pgresult(self)));
    }