Determinacy and rewriting of conjunctive queries using views: a progress report

    ICDT, pp. 59-73, 2007.

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    progress reportmonotonic languageconjunctive viewconventional wisdomvarious queryMore(7+)

    Abstract:

    Suppose we are given a set of exact conjunctive views V and a conjunctive query Q. Suppose we wish to answer Q using V, but the classical test for the existence of a conjunctive rewriting of Q using V answers negatively. What can we conclude: (i) there is no way Q can be answered using V, or (ii) a more powerful rewriting language may be ...More

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