Estimating the cost of updates in a relational database

  • Authors:
  • M. Schkolnick;P. Tiberio

  • Affiliations:
  • IBM Research Laboratory, San Jose, CA;IBM Research Laboratory, San Jose, CA

  • Venue:
  • ACM Transactions on Database Systems (TODS)
  • Year:
  • 1985

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Abstract

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.