It'll be automatic, if everything works right, then you won't have to manually request them.

But again, it's going to be very difficult if not impossible depending on the fare class to use the miles on your CAN-LJG trip.

If you don't travel much then I would be trying to put the miles into Delta Skymiles which never expire. Just make sure you're buying a miles earning fare class, which as mentioned above are few... also not sure if this will still work, but a few years back I bought the LAX-CAN-LAX flights as DL codeshares which credit 100% miles to Skymiles regardless of the fare class.