Query racing: fast completeness certification of query results

  • Authors:
  • Bernardo Palazzi;Maurizio Pizzonia;Stefano Pucacco

  • Affiliations:
  • Roma TRE University, Rome Italy and Brown University, Department of Computer Science, Providence, RI;Roma TRE University, Rome Italy;Roma TRE University, Rome Italy

  • Venue:
  • DBSec'10 Proceedings of the 24th annual IFIP WG 11.3 working conference on Data and applications security and privacy
  • Year:
  • 2010

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Abstract

We present a general and effective method to certify completeness of query results on relational tables stored in an untrusted DBMS. Our main contribution is the concept of "Query Race": we split up a general query into several single attribute queries, and exploit concurrency and speed to bind the complexity to the fastest of them. Our method supports selection queries with general composition of conjunctive and disjunctive order-based conditions on different attributes at the same time. To achieve our results, we require neither previous knowledge of queries nor specific support by the DBMS. We validate our approach with experimental results performed on a prototypical implementation.