Optimizing Repair Programs for Consistent Query Answering in Databases
Monica Caniupan
Broschiertes Buch

Optimizing Repair Programs for Consistent Query Answering in Databases

Optimizing and Implementing Repair Programs for Consistent Query Answering in Databases

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Databases may not always satisfy their integrity constraints (ICs). However, in most cases an important part of the data is still consistent with the ICs, and can still be retrieved through queries posed to the database. Consistent query answers are characterized as answers obtained from every minimally repaired and consistent version of the database. Database repairs can be specied as stable models of disjunctive logic programs. Consistent Query Answering (CQA) for first-order queries is translated into cautious reasoning under the stable models semantics. Using logic programs in a straightfo...