2546 search results - page 28 / 510 » Managing long-running queries |
BTW
2005
Springer
15 years 3 months ago
2005
Springer
: Optimizers in modern DBMSs utilize a cost model to choose an efficient query execution plan (QEP) among all possible ones for a given query. The accuracy of the cost estimates de...
FOIKS
2006
Springer
15 years 1 months ago
2006
Springer
Abstract. We present here a formal foundation for an iterative and incremental approach to constructing and evaluating preference queries. Our main focus is on query modification: ...
101
Voted
HUC
2009
Springer
15 years 2 months ago
2009
Springer
To usefully query a location-based service, a mobile device must typically present its own location in its query to the server. This may not be acceptable to clients that wish to ...
172
Voted
GIS
2005
ACM
15 years 11 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...
97
Voted
ICEBE
2005
IEEE
15 years 3 months ago
2005
IEEE
Over a traditional Database Management System (DBMS), the answer to an aggregate query is usually much smaller than the answer to a similar nonaggregate query. Therefore, we call ...