What Would happen if my computer restarted itself while I was doing a manual vacuum?

[Eclipse86]

Been having quite a few power outages lately. Was just wondering if it would damage my database in any way if I was to to do manual vacuum/analyze and my computer was to all of a sudden shutdown due to a power outage.

[morny]

Its a small bit unlikely but certainly possible, and with any program in the middle of a task it could also damage them too.