Query rewriting and answering under constraints in data integration systems

  • Authors:
  • Andrea Cali;Domenico Lembo;Riccardo Rosati

  • Affiliations:
  • Dipartimento di Informatica e Sistemistica, Universita di Roma "La Sapienza", Roma, Italy;Dipartimento di Informatica e Sistemistica, Universita di Roma "La Sapienza", Roma, Italy;Dipartimento di Informatica e Sistemistica, Universita di Roma "La Sapienza", Roma, Italy

  • Venue:
  • IJCAI'03 Proceedings of the 18th international joint conference on Artificial intelligence
  • Year:
  • 2003

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Abstract

Speculative execution of information gathering plans can dramatically reduce the effect of source I/O latencies on overall performance. However, the utility of speculation is closely tied to how accurately data values are predicted at runtime. Caching ...