Problem Deleting Orders - (orders/index.php)

[Guest]

Let's say I have several orders in the DB.

I delete an order in the admin panel and it asks "Are you sure". I click OK and the page refreshes, and it says "There are no orders in the database."

The link in the address bar is, for example "orders/?delete=070722-153950-4478&customer_id=7"

If I refresh the above link, I get the same message that no orders exist.

It does actually delete the order but I have to click on the 'Orders' button in the left nav and it shows me all my orders again.

No I've narrowed it down to this piece of code:

$sqlQuery = "";

if(isset($_GET['oid']) && !isset($_GET['delete'])){

 	$sqlQuery = "WHERE cart_order_id = ".$db->mySQLsafe($_GET['oid']);

} elseif(isset($_GET['customer_id']) && $_GET['customer_id']>0){

	$sqlQuery = "WHERE ".$glob['dbprefix']."CubeCart_customer.customer_id = ".$db->mySQLsafe($_GET['customer_id']);

// }

When I remove the above code, everything works as it should

Can anyone explain to me what this code does? I can't just remove it!

Many thanks.