Check if table column exists inside XML

[Andreas]

Hmm, I just fire off ALTER TABLE Queries without bothering if it does exist or not.
If it does mySQL will return an Error, but who cares ^.^

You could also use Class vB_Database_Alter_MySQL (probably the preferred and best way).
(The Reason I didn't so far is that it wasn't wroking in the Beta Versions, but seems like the Code has been fixed since RC1 )