289 search results - page 20 / 58 » Control of an Extensible Query Optimizer: A Planning-Based A... |
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
In this paper, we study whether the need for efficient XML publishing brings any new requirements for relational query engines, or if sorting query results in the relational engin...
VLDB
1998
ACM
13 years 12 months ago
1998
ACM
Currently the key problems of query optimization are extensibility imposed by object-relational technology, as well as query complexity caused by forthcoming applications, such as...
CIKM
2009
Springer
14 years 9 days ago
2009
Springer
Answering queries using views is a well-established technique in databases. In this context, two outstanding problems can be formulated. The first one consists in deciding whethe...
EDBT
2006
ACM
14 years 7 months ago
2006
ACM
Current methods for selectivity estimation fall into two broad categories, synopsis-based and sampling-based. Synopsis-based methods, such as histograms, incur minimal overhead at ...
WWW
2007
ACM
14 years 8 months ago
2007
ACM
Search queries applied to extract relevant information from the World Wide Web over a period of time may be denoted as continuous search queries. The improvement of continuous sea...