62 search results - page 4 / 13 » Query rewriting with symmetric constraints |
PVLDB
2010
13 years 4 months ago
2010
Supporting legacy applications when the database schema evolves represents a long-standing challenge of practical and theoretical importance. Recent work has produced algorithms a...
CIKM
2005
Springer
13 years 12 months ago
2005
Springer
We introduce the notion of views as a mechanism for securing and providing access control in the context of XML. Research in XML has explored several efficient querying mechanism...
SIGMOD
2005
ACM
14 years 6 months ago
2005
ACM
Although integrity constraints have long been used to maintain data consistency, there are situations in which they may not be enforced or satisfied. In this paper, we present Con...
DBISP2P
2006
Springer
13 years 10 months ago
2006
Springer
Sharing of structured data in P2P overlays is a challenging problem, especially in the absence of a global schema. The nature of structured data stored in the overlay enforces stri...
SIGMOD
1999
ACM
13 years 10 months ago
1999
ACM
In this paper we present a mechanism for translating constraint queries, i.e., Boolean expressions of constraints, across heterogeneous information sources. Integrating such syste...