3225 search results - page 637 / 645 » Query Optimization by Stored Queries |
CIKM
2004
Springer
14 years 26 days ago
2004
Springer
We study the representation, derivation and utilization of a special kind of constraints in multidatabase systems. A major challenge is when component database schemas are schemat...
SAG
2004
Springer
14 years 25 days ago
2004
Springer
Grid workflows can be seen as special scientific workflows involving high performance and/or high throughput computational tasks. Much work in grid workflows has focused on improvi...
VLDB
2004
ACM
2004
ACM
A Multi-Purpose Implementation of Mandatory Access Control in Relational Database Management Systems
14 years 24 days ago
Mandatory Access Control (MAC) implementations in Relational Database Management Systems (RDBMS) have focused solely on Multilevel Security (MLS). MLS has posed a number of challe...
VLDB
2004
ACM
14 years 24 days ago
2004
ACM
Cost-based XML query optimization calls for accurate estimation of the selectivity of path expressions. Some other interactive and internet applications can also benefit from suc...
XSYM
2004
Springer
14 years 24 days ago
2004
Springer
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...