2217 search results - page 24 / 444 » Rank-aware Query Optimization |
GIS
2005
ACM
14 years 10 months ago
2005
ACM
Group nearest neighbor (GNN) queries are a relatively new type of operations in spatial database applications. Different from a traditional kNN query which specifies a single quer...
SIGMOD
2007
ACM
14 years 9 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...
ICDE
2009
IEEE
14 years 11 months ago
2009
IEEE
Commercial database systems expose query hints to address situations in which the optimizer chooses a poor plan for a given query. However, current query hints are not flexible eno...
SIGMOD
2005
ACM
14 years 9 months ago
2005
ACM
Research on query optimization has focused almost exclusively on reducing query execution time, while important qualities such as consistency and predictability have largely been ...
ICDCN
2009
Springer
14 years 2 months ago
2009
Springer
Wireless sensor networks with multiple users collecting data directly from the sensors have many potential applications. An important problem is to allocate for each user a query r...