php语法中如何利用SQL语句设置超时时间来控制查询的执行时间

$stmt = $conn->prepare("SELECT * FROM users WHERE id=id号");
$stmt->bind_param("i", $id);
$stmt->execute();
$stmt->store_result();
$stmt->sqlstate();
$stmt->get_warnings();
$stmt->errno();
$stmt->error();
$stmt->fetch();
$stmt->query("SET SESSION wait_timeout=120");