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» Query Containment for Conjunctive Queries with Regular Expre...

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ER
2008
Springer

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Conjunctive Query Containment under Access Limitations

13 years 9 months ago

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Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...

Andrea Calì, Davide Martinenghi

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ICDT
2007
ACM

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Some Algorithmic Improvements for the Containment Problem of Conjunctive Queries with Negation

14 years 1 months ago

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Query containment is a fundamental problem of databases. Given two queries q1 and q2, it asks whether the set of answers to q1 is included in the set of answers to q2 for any datab...

Michel Leclère, Marie-Laure Mugnier

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TOCL
2008

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Conjunctive query containment and answering under description logic constraints

13 years 7 months ago

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Diego Calvanese, Giuseppe De Giacomo, Maurizio Len...

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