166 search results - page 13 / 34 » Extending the Search Strategy in a Query Optimizer |
VLDB
1987
ACM
13 years 11 months ago
1987
ACM
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...
BTW
2005
Springer
14 years 28 days 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...
AAAI
2007
13 years 9 months ago
2007
We present in this paper a hybrid planning system which combines constraint satisfaction techniques and planning heuristics to produce optimal sequential plans. It integrates its ...
KES
2010
Springer
13 years 5 months ago
2010
Springer
This paper proposes a new solution to the vehicle routing problem with time windows using an evolution strategy adopting viral infection. The problem belongs to the NP-hard class a...
WAIM
2004
Springer
14 years 22 days ago
2004
Springer
A top-N selection query against a relation is to find the N tuples that satisfy the query condition the best but not necessarily completely. In this paper, we propose a new method ...