How not to trigger the OnOrderUpdate event when an order is deleted?

Question

CMS

There is a task, to hang up function on event OnOrderUpdateand OnBeforeOrderDelete. But when OnBeforeOrderDeletethe call to update the order is also triggered, the function that I do not need is called. How to remove the call OnOrderUpdatewhen deleting an order, or what condition to check inside the function whether it was called when deleting?

Answer 1

Return false in the OnOrderUpdate event handler function
return false;

Answer 2

If before deleting the order the order fields are:
CANCELED = Y
ALLOW_DELIVERY = N
DEDUCTED = N
RESERVED = N
PAYED = N
then OnOrderUpdate will not be called.