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» Answering Non-Monotonic Queries in Relational Data Exchange
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ICDT
2010
ACM
195views Database» more  ICDT 2010»
9 years 3 months ago
Answering Non-Monotonic Queries in Relational Data Exchange
Relational data exchange deals with translating a relational database instance over some source schema into a relational database instance over some target schema, according to a ...
André Hernich
PODS
2008
ACM
170views Database» more  PODS 2008»
9 years 11 months ago
Answering aggregate queries in data exchange
Data exchange, also known as data translation, has been extensively investigated in recent years. One main direction of research has focused on the semantics and the complexity of...
Foto N. Afrati, Phokion G. Kolaitis
PODS
2004
ACM
120views Database» more  PODS 2004»
9 years 11 months ago
Locally Consistent Transformations and Query Answering in Data Exchange
Data exchange is the problem of taking data structured under a source schema and creating an instance of a target schema. Given a source instance, there may be many solutions ? ta...
Marcelo Arenas, Pablo Barceló, Ronald Fagin...
ICDT
2009
ACM
149views Database» more  ICDT 2009»
9 years 12 months ago
Query languages for data exchange: beyond unions of conjunctive queries
The class of unions of conjunctive queries (UCQ) has been shown to be particularly well-behaved for data exchange; its certain answers can be computed in polynomial time (in terms...
Juan Reutter, Marcelo Arenas, Pablo Barceló
PODS
2005
ACM
147views Database» more  PODS 2005»
9 years 11 months ago
Peer data exchange
Abstract. We present a semantics and answer set programs for relational peer data exchange systems. When a peer answers a query, it exchanges data with other peers in order to supp...
Ariel Fuxman, Phokion G. Kolaitis, Renée J....
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