Update semantics of relational views
ACM Transactions on Database Systems (TODS)
On the correct translation of update operations on relational views
ACM Transactions on Database Systems (TODS)
Calculating constraints on relational expression
ACM Transactions on Database Systems (TODS)
Properties of functional-dependency families
Journal of the ACM (JACM)
Principles of Database Systems
Principles of Database Systems
PODS '83 Proceedings of the 2nd ACM SIGACT-SIGMOD symposium on Principles of database systems
On the semantics of updates in databases
PODS '83 Proceedings of the 2nd ACM SIGACT-SIGMOD symposium on Principles of database systems
Dynamic constraints and database evolution
PODS '83 Proceedings of the 2nd ACM SIGACT-SIGMOD symposium on Principles of database systems
Dynamic constraints and database evolution
Dynamic constraints and database evolution
Theory of Relational Databases
Theory of Relational Databases
Equivalence and optimization of relational transactions
Journal of the ACM (JACM)
Transactions in Relational Databases (Preliminary Report)
VLDB '84 Proceedings of the 10th International Conference on Very Large Data Bases
Foundations of data-aware process analysis: a database theory perspective
Proceedings of the 32nd symposium on Principles of database systems
Hi-index | 0.00 |
User views in a relational database obtained through a single projection ("projection views") are considered in a new framework. Specifically, such views where each tuple in the view represents an object ("object projection views") are studied using the dynamic relational model of [V1,V2], which captures the evolution of the database through consecutive updates. Attribute sets which yield object projection views are characterized using the static and dynamic functional dependencies satisfied by the database. Object projection views are then described using the static and dynamic fd's "inherited" from the original database, and the notion of age-closure [V1]. Finally, the impact of dynamic constraints on the view update problem is studied in a limited context. The paper demonstrates that new, useful information about views can be obtained by looking at the evolution of the database as captured by the dynamic relational model.