427 search results - page 64 / 86 » Conjunctive Query Answering in EL using a Database System |
SIGMOD
2007
ACM
14 years 8 months ago
2007
ACM
The family of threshold algorithm (i.e., TA) has been widely studied for efficiently computing top-k queries. TA uses a sort-merge framework that assumes data lists are pre-sorted...
VLDB
1997
ACM
14 years 22 days ago
1997
ACM
The goal of a mediator system is to provide users a uniform interface to the multitude of information sources. To translate user queries, given in a mediated schema, to queries on...
SIGMOD
2007
ACM
14 years 8 months ago
2007
ACM
An emerging challenge in modern distributed querying is to efficiently process multiple continuous aggregation queries simultaneously. Processing each query independently may be i...
SIGMOD
2003
ACM
14 years 8 months ago
2003
ACM
Most relational query optimizers make use of information about the costs of accessing tuples and data structures on various storage devices. This information can at times be off b...
SOSP
2007
ACM
14 years 5 months ago
2007
ACM
This paper describes the design, implementation, and evaluation of a replication scheme to handle Byzantine faults in transaction processing database systems. The scheme compares ...