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Programming with logical queries, bulk updates, and hypothetical reasoning

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1 Author(s)
Weidong Chen ; Dept. of Comput. Sci. & Eng., Southern Methodist Univ., Dallas, TX, USA

The paper presents a language of update programs that integrates logical queries, bulk updates and hypothetical reasoning in a seamless manner. There is no syntactic or semantic distinction between queries and updates. Update programs extend logic programs with negation in both syntax and semantics. They allow bulk updates in which an arbitrary update is applied simultaneously for all answers of an arbitrary query. Hypothetical reasoning is naturally supported by testing the success or failure of an update. We describe an alternating fixpoint semantics of update programs and show that it can express all nondeterministic database transformations

Published in:

Knowledge and Data Engineering, IEEE Transactions on  (Volume:9 ,  Issue: 4 )

Date of Publication:

Jul/Aug 1997

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