186 search results - page 20 / 38 » Queries and materialized views on probabilistic databases |
125
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CIKM
2004
Springer
15 years 4 months ago
2004
Springer
Materialized views defined over distributed data sources are a well recognized technology for modern applications. Stateof-the-art incremental view maintenance requires O(n2 ) or ...
120
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DAWAK
2000
Springer
15 years 4 months ago
2000
Springer
In the context of multidimensional databases implemented on relational DBMSs through star schemes, the most effective technique to enhance performances consists of materializing re...
123
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SIGMOD
2004
ACM
16 years 21 days ago
2004
ACM
The prevalent use of XML highlights the need for a generic, flexible access-control mechanism for XML documents that supports efficient and secure query access, without revealing ...
110
Voted
ICDT
2003
ACM
15 years 5 months ago
2003
ACM
We state and solve the query reformulation problem for XML publishing in a general setting that allows mixed (XML and relational) storage for the proprietary data and exploits redu...
137
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WWW
2011
ACM
14 years 7 months ago
2011
ACM
The problem of answering SPARQL queries over virtual SPARQL views is commonly encountered in a number of settings, including while enforcing security policies to access RDF data, ...