654 search results - page 29 / 131 » Complexity of Answering Queries Using Materialized Views |
VLDB
2002
ACM
13 years 8 months ago
2002
ACM
An increasing number of applications use XML data published from relational databases. For speed and convenience, such applications routinely cache this XML data locally and acces...
SIGMOD
2006
ACM
14 years 8 months ago
2006
ACM
We present and analyze an algorithm for equivalent rewriting of XQuery queries using XQuery views, which is complete for a large class of XQueries featuring nested FLWR blocks, XM...
PODS
2006
ACM
14 years 8 months ago
2006
ACM
Privacy-preserving query-answering systems answer queries while provably guaranteeing that sensitive information is kept secret. One very attractive notion of privacy is perfect p...
DAWAK
2003
Springer
14 years 1 months ago
2003
Springer
View materialization is recognized to be one of the most effective ways to increase the Data Warehouse performance; nevertheless, due to the computational complexity of the techniq...
DLOG
2011
12 years 12 months ago
2011
W3C currently extends the SPARQL query language with so-called entailment regimes, which define how queries are evaluated using logical entailment relations. We describe a sound a...