Classification of annotation semirings over containment of conjunctive queries

Classification of annotation semirings over containment of conjunctive queries

We study the problem of query containment of conjunctive queries over annotated databases. Annotations are typically attached to tuples and represent metadata, such as probability, multiplicity, comments, or provenance. It is usually assumed that annotations are drawn from a commutative semiring. Su...

書誌詳細
主要な著者:	Kostylev, E, Reutter, J, Salamon, A
フォーマット:	Journal article
出版事項:	Association for Computing Machinery 2017

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