In this short paper we present the coDB P2P DB system. A network of databases, possibly with different schemas, are interconnected by means of GLAV coordination rules, which are inclusions of conjunctive queries, with possibly existential variables in the head; coordination rules may be cyclic. Each node can be queried in its schema for data, which the node can fetch from its neighbours, if a coordination rule is involved.
Queries and Updates in the coDB Peer to Peer Database System / Franconi, Enrico; Kuper, Gabriel; Zaihrayeu, Ilya; Lopatenko, Andrei. - ELETTRONICO. - (2004).
Queries and Updates in the coDB Peer to Peer Database System
Kuper, Gabriel;Zaihrayeu, Ilya;
2004-01-01
Abstract
In this short paper we present the coDB P2P DB system. A network of databases, possibly with different schemas, are interconnected by means of GLAV coordination rules, which are inclusions of conjunctive queries, with possibly existential variables in the head; coordination rules may be cyclic. Each node can be queried in its schema for data, which the node can fetch from its neighbours, if a coordination rule is involved.File in questo prodotto:
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