I studied this very carefully when I started writing science fiction, because it quickly become relevant.
A spacecraft is not a submarine, which is designed to hold out many, many atmospheres of pressure differential.
A spacecraft is designed to hold in one.
For comparison purposes, the pressure differential in your Honda Civic's tires is about 2.5 atmospheres. 1.0 would be a flat tire.
So, no, a small breech will not suck you out into space. Nor will it instantly evacuate your vessel.
Just walk up and slap a patch on it.
I found a photo of one of the repair operations, they literally drill a hole through the pressure hull to stop the crack propagating and then immediately seal it with epoxy.