Exact and inexact methods for solving the problem of view selection for aggregate queries

  • Authors:
  • Zohreh Asgharzadeh Talebi;Rada Chirkova;Yahya Fathi

  • Affiliations:
  • Operations Research Program, NC State University, Raleigh, NC 27695, USA.;Computer Science Department, NC State University, Raleigh, NC 27695, USA.;Operations Research Program, NC State University, Raleigh, NC 27695, USA

  • Venue:
  • International Journal of Business Intelligence and Data Mining
  • Year:
  • 2009

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Abstract

We study the following warehouse view-selection problem: Given a data-warehouse schema, a set of parameterised aggregate queries and their frequency distribution, and a storage-limit constraint, find a set of aggregate views that, when materialised in the warehouse, would minimise the evaluation costs of the frequent queries, subject to a storage-limit constraint. Optimising the layout of stored data using view selection has a direct impact on the performance of data warehouses. We introduce an integer-programming model to obtain optimal solutions for the warehouse view-selection problem, and propose a heuristic to obtain competitive inexact solutions where our exact method is not applicable.