Aggregate Operations in the Information Source Tracking Method

  • Fereidoon Sadri
Conference paper
Part of the Workshops in Computing book series (WORKSHOPS COMP.)

Abstract

The Information Source Tracking method, IST, is an approach to the management of uncertain and imprecise data in database systems. In this paper we study the processing of queries involving aggregate operations in the IST method. The problems discussed include producing all possible outcomes of an aggregate query and their probabilities, and determining the probability of a specific outcome. We present algorithms for the evaluation of aggregate queries, and show that some of these problems are intractable.

Keywords

StEr 

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Copyright information

© British Computer Society 1993

Authors and Affiliations

  • Fereidoon Sadri
    • 1
  1. 1.Department of Computer ScienceConcordia UniversityMontrealCanada

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