409 search results - page 70 / 82 » Plan Databases: Model and Algebra |
ICDE
2005
IEEE
15 years 3 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
103
Voted
VRML
1998
ACM
15 years 1 months ago
1998
ACM
In its current state, VRML does not provide support for interaction and on-line access to databases, even though these are two fundamental issues for business applications. We hav...
DGO
2003
14 years 11 months ago
2003
Metadata descriptions of database contents are required to build and use systems that access and deliver data in response to user requests. When numerous heterogeneous databases a...
107
Voted
AGIS
1998
14 years 9 months ago
1998
With the development of modern cities, 3-D spatial information systems (SIS) are increasingly required for spatial planning, communication systems and other applications. The geom...
101
Voted
EDBT
2012
ACM
12 years 12 months ago
2012
ACM
Query optimization in RDF Stores is a challenging problem as SPARQL queries typically contain many more joins than equivalent relational plans, and hence lead to a large join orde...