Craig,

>The code may not work in a busy, multi-user system. There is nothing to stop two users from adding the first key for a table at the same time.

This seems more an academical problem that it will be in practice. The chance that two users will try to add exactly the same key for the first time when not already available time is virtually nill. When systems go in production they seldom are started in a heavy multiuser environment directly

Of course in theory you've got a point.

Walter,