6004 search results - page 206 / 1201 » Parallelizing query optimization |
AMW
2010
13 years 11 months ago
2010
We address the problem of answering conjunctive queries over knowledge bases, specified by sets of first-order sentences called tuple-generating dependencies (TGDs). This problem i...
DS
1997
13 years 11 months ago
1997
The ODMG proposal has helped to focus the work on object-oriented databases (OODBs) onto a common object model and query language. Nevertheless there are several shortcomings of t...
APPT
2005
Springer
14 years 10 days ago
2005
Springer
It is difficult to maintain the exact location of mobile objects due to the limited resources in a mobile network. A consequence of this problem is that the update cost for a locat...
DEBS
2008
ACM
14 years 4 days ago
2008
ACM
Evaluation of complex event queries over time involves storing information about those events that are relevant for, i.e., might contribute to, future answers. We call the period ...
PDIS
1994
IEEE
14 years 2 months ago
1994
IEEE
Many new database applications require very large volumes of data. Mariposa is a data base system under construction at Berkeley responding to this need. Mariposa objects can be s...