Drupal 7 path_save with a query arguments - drupal

Question

I've searched all over for examples of this, but I haven't found any. I'm trying to create an alias for path which includes query arguments, like profile?arg1=113.
It doesn't matter if I provide path_save() with the plain string representation of the path, or if I provide it with url().
url('profile', array('query' => array('arg1' => $uid)))
Either way, ? and = show up as escaped characters on the URL aliases admin page, which naturally means the path can't be found.
How can I keep the ? and = from being escaped?
12/19/12 Edit 1: the larger context is that I'm trying to set up the alias when a Profile2 profile is being saved (i.e., in mymodule_profile2_presave()) - that's when I'll have all the information I need to programmatically set up the alias.
12/19/12 Edit 2: I just realized that the problem isn't on the insert side - the url_alias table actually has unescaped characters in it. The problem is that Drupal doesn't urldecode the path before using it...
12/20/12 Edit 3: Found a solution using Redirect instead of path aliases. Redirect properly decodes the query string!

Answer 1

You cannot attach the query string to the destination of an alias. The code executed from drupal_path_initialize() doesn't handle the query string correctly.
The function contains the following code.
$_GET['q'] = drupal_get_normal_path($_GET['q']);
Suppose that you have "example" as path alias that points to "node/93?uid=1"; that code would set $_GET['q'] to 'node/93?uid=1', while you are expecting $_GET['q'] to get 'node/93', and $_GET['uid'] to be set to 1.
What you could do is implementing hook_inbound_alter() with code similar to the following one.
function mymodule_url_inbound_alter(&$path, $original_path, $path_language) {
list ($path, $query) = explode('?', $path);
$_GET += drupal_get_query_array($query);
}