Schema Evolution publication categorizer

Telecom Databases need very high availability for
both read and write transactions. Thus it is desired that
not even schema changes are allowed to block any type
of transactions. We show in this paper a method to handle
schema changes which is based on a transaction oriented
change with the aid of triggers. The old and the
new schema can be used concurrently so it is never necessary
to block any transactions.
A nice feature of the method presented in this paper
is that it is easy to integrate into an already existing
DBMS.
This functionality is rarely, if ever, found in neither
products nor research articles.