1394 search results - page 121 / 279 » Executing Nested Queries |
139
Voted
PVLDB
2008
15 years 3 months ago
2008
Estimates of predicate selectivities by database query optimizers often differ significantly from those actually encountered during query execution, leading to poor plan choices a...
165
Voted
CIDR
2011
14 years 7 months ago
2011
End-to-end data processing environments are often comprised of several independently-developed (sub-)systems, e.g. for engineering, organizational or historical reasons. Unfortuna...
153
Voted
ICDE
2012
IEEE
13 years 6 months ago
2012
IEEE
Abstract—This paper revisits the classical problem of multiquery optimization in the context of RDF/SPARQL. We show that the techniques developed for relational and semi-structur...
165
Voted
PVLDB
2008
15 years 3 months ago
2008
Companies providing cloud-scale services have an increasing need to store and analyze massive data sets such as search logs and click streams. For cost and performance reasons, pr...
238
click to vote
ICDE
2003
IEEE
16 years 5 months ago
2003
IEEE
In moving object environments, it is infeasible for the database tracking the movement of objects to store the exact locations of objects at all times. Typically, the location of a...