So far, I've always waited until all users are out of a system before
applying metadata changes. However, there are times where I'm working on a
new part of the system involving tables which the application is not yet
using. At least, the application version that the users are using, anyway.

Are there any dangers to doing metadata changes to tables which I know that
no one is using except me? I haven't done it yet, because I don't want to
risk the integrity of the live (users) database. But I would be interested
to know if this is safe at all...

Woody (TMW)