def METHOD_NAME(pgconn):
    res = pgconn.exec_(b"select 1::int4, 1::bigint, 1::text")
    assert res.status == pq.ExecStatus.TUPLES_OK, res.error_message
    assert res.fsize(0) == 4
    assert res.fsize(1) == 8
    assert res.fsize(2) == -1
    res.clear()
    assert res.fsize(0) == 0