654 search results - page 13 / 131 » Complexity of Answering Queries Using Materialized Views |
SSDBM
2009
IEEE
14 years 3 months ago
2009
IEEE
Scientific experiments produce large volumes of data represented as complex objects that describe independent events such as particle collisions. Scientific analyses can be express...
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
We study the problem of answering queries posed on virtual views of XML documents, a problem commonly encountered when enforcing XML access control and integrating data. We approa...
SIGMOD
1997
ACM
14 years 18 days ago
1997
ACM
Data warehouses store materialized views over base data from external sources. Clients typically perform complex read-only queries on the views. The views are refreshed periodical...
SIGMOD
2004
ACM
14 years 8 months 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 ...
ICDE
2000
IEEE
14 years 9 months ago
2000
IEEE