13151 search results - page 2214 / 2631 » Position based dynamics |
279
click to vote
VLDB
2004
ACM
16 years 7 months ago
2004
ACM
Abstract. In dynamic environments like the Web, data sources may change not only their data but also their schemas, their semantics, and their query capabilities.When a mapping is ...
266
click to vote
VLDB
2007
ACM
16 years 7 months ago
2007
ACM
In large-scale distributed information systems, where participants are autonomous and have special interests for some queries, query allocation is a challenge. Much work in this c...
308
click to vote
SIGMOD
2009
ACM
16 years 7 months ago
2009
ACM
The skyline operator returns from a set of multi-dimensional objects a subset of superior objects that are not dominated by others. This operation is considered very important in ...
260
click to vote
SIGMOD
2007
ACM
16 years 7 months ago
2007
ACM
A cracked database is a datastore continuously reorganized based on operations being executed. For each query, the data of interest is physically reclustered to speed-up future ac...
196
click to vote
SIGMOD
2004
ACM
16 years 7 months ago
2004
ACM
Cardinality estimation during query optimization relies on simplifying assumptions that usually do not hold in practice. To diminish the impact of inaccurate estimates during opti...