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    On Detecting Conflict Between Proposed Updates

    Database Programming Languages

    Italy. 6th - 8th September 1995

    AUTHORS

    M. Doherty, R. Hull, M. Derr & J. Durand

    ABSTRACT

    In the Heraclitus paradigm, a delta value or more simply, delta, is a concrete value that corresponds to a difference between database states.

    This paper presents the Heraclitus [OO] (abbreviated H2O) DBPL, which provides a syntax and semantics for working with deltas in the context of object-oriented databases.

    The paper also considers the use of deltas in connection with detecting conflict between pairs of proposed updates to a database.

    This is useful in contexts where multiple users are each creating and choosing between multiple possible updates.

    A semantically based notion of potential conflict between proposed updates is developed, along with several conservative approximations based on the use of different kinds of delta.

    PAPER FORMATS

    PDF filePDF Version of this Paper (188kb)