retagging revisions

I didn't want to hijack a thread for something that isn't important to me,
but now I'm intrigued.

Suppose I want to have a moving tag e.g. /tags/stable (call it the_tag)
which can "point to" various revisions e.g. in /trunk (call it the_revision).
You can always move the tag by first deleting the_tag and recreating it as a
copy of a new revision, in two transactions.

But in the thread "Move from CVSNT to SVN?", Lorenz writes:
> svnmucc rm the_tag cp revision the_revision the_tag

Indeed a neat way to do it a single transaction. The result is a single
changeset in which the directory the_tag is replaced by a copy of
the_revision. Or I suppose you could bundle multiple replacements in a single
transaction.

But in the thread "back-end fsfs DB corruption? - attempt to merge uncovering
it", Stefan Sperling writes:

> [...] if a file was replaced within a single revision
> (which can also happen for directories under certain circumstances,
> but which is actually not supported by design in 1.6.x).

So should we shy away from retagging in a single transaction?

-- 
Stein
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