708 search results - page 46 / 142 » A Genetic Algorithm for Database Query Optimization |
JAPLL
2010
13 years 7 months ago
2010
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
In this paper we explore database segmentation in the context of a column-store DBMS targeted at a scientific database. We present a novel hardware- and scheme-oblivious segmentati...
SIGMOD
1993
ACM
14 years 27 days ago
1993
ACM
We describe the design and implementation of the Glue-Nail database system. The Nail language is a purely declarative query language; Glue is a procedural language used for nonque...
PODS
2010
ACM
14 years 1 months ago
2010
ACM
We give the first optimal algorithm for estimating the number of distinct elements in a data stream, closing a long line of theoretical research on this problem begun by Flajolet...
PODS
2006
ACM
14 years 9 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...