848 search results - page 67 / 170 » Optimization of Sequence Queries in Database Systems |
IDEAS
2009
IEEE
14 years 3 months ago
2009
IEEE
In this paper, we present our work on evaluating the skyline algorithms BNL, SFS, and a variant of LESS in PostgreSQL. It is well known that the performance of skyline queries is ...
ISCI
2007
13 years 8 months ago
2007
In an object-relational database management system, a query optimizer requires users to provide cost models of userdefined functions. The traditional approach is analytical, that...
SIGMOD
2011
ACM
12 years 11 months ago
2011
ACM
We are witnessing an exciting revival of interest in recursive Datalog queries in a variety of emerging application domains such as data integration, information extraction, netwo...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
We study the problem of computing query results with confidence values in ULDBs: relational databases with uncertainty and lineage. ULDBs, which subsume probabilistic databases, o...
ICDCS
2005
IEEE
14 years 2 months ago
2005
IEEE
Database queries, in particular, event-driven continuous queries, are useful for many pervasive computing applications, such as video surveillance. In order to enable these applic...