Schema Evolution publication categorizer

... 970.14 KB In relational databases a view definition is a query against the database, and ... materialization over a database may change as relations in the database undergo modificationsIn this paper a mechanism is proposed in which the view is materialized at all times The problem which this mechanism ...

Publication - cat - 04/17/2013 - 08:05 - 0 comments - 1 attachment

... to the original one. This question was addressed in the literature with respect to those relational schemes that satisfy the so ... \"tractable\" We are able to test losslessness defined in such a way for a wide class of relational expressions and dependencies. An ...

Publication - huliganka - 04/17/2013 - 00:27 - 0 comments - 1 attachment

... of relationships among data is an important activity in schema integration. The latter can arise as integration of user views In logical database design or as the creation of a global schema from existing ...

Publication - cat - 04/16/2013 - 13:05 - 0 comments - 0 attachments

... relationship between independent and complementary views In unrestricted domains, a view (but not the identity or empty view) can have ... A view is monotonic if it preserves inclusion However, in finite power sets when all views are monotonic, if a given view has another ...

Publication - huliganka - 04/16/2013 - 05:49 - 0 comments - 1 attachment