Query Processing in Data Integration

Authors Paolo Guagliardo, Piotr Wieczorek

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Paolo Guagliardo
Piotr Wieczorek

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Paolo Guagliardo and Piotr Wieczorek. Query Processing in Data Integration. In Data Exchange, Integration, and Streams. Dagstuhl Follow-Ups, Volume 5, pp. 129-160, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2013)


In this chapter we illustrate the main techniques for processing queries in data integration. The first part of the chapter focuses on the problem of query answering in the relational setting, and describes approaches based on variants of the chase, along with how to deal with integrity constraints and access patterns. The second part of the chapter investigates query processing in the context of semistructured data, which is best described by graph-based data models, where the expressiveness of query languages not common in traditional database systems allows to point out the subtle differences between query answering and query rewriting. The chapter is closed by a very brief discussion of query processing in data integration with XML and ontologies.
  • Query processing
  • Data integration
  • Relational data
  • Semistructured data


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