Estimating the cost of updates in a relational database
Mario Schkolnick, Paolo Tiberio · ACM Transactions on Database Systems · 1985
In this paper, cost formulas are derived for the updates of data and indexes in a relational database. The costs depend on the data scan type and the predicates involved in the update statements. We show that update costs have a considerable influence, both in the context of the physical database design problem and in access path selection in query optimization for relational DBMSs.