Abstract:
In distributed environments, materialized
views are used to replicate the data at distributed
sites and to synchronize data updates at several
sites. Thus, Materialized view is a kind of way to
replicate the distributed data .The data are
replicated from master table and then sent to other
sites as a materialized view that is used to access
the distributed data. Therefore the user can access
about the data in local site and even can access
data from other sites in entire domain. The user
should not need to know where a piece of data is
stored physically. This system is intended to
implement the Sale System in updateable
materialized views (MV) for distributed data.In
order to access data not only from local sale site
but also from other sale sites and data
concurrency is controlled by the timestamp
ordering.
