1168 search results - page 46 / 234 » Optimization strategies for complex queries |
SIGMOD
1996
ACM
14 years 2 months ago
1996
ACM
While much recent research has focussed on extending databases beyond the traditional relational model, relatively little has been done to develop database tools for querying data...
CIKM
2009
Springer
14 years 5 months ago
2009
Springer
We introduce a new theoretical derivation, evaluation methods, and extensive empirical analysis for an automatic query expansion framework in which model estimation is cast as a r...
VLDB
2004
ACM
14 years 4 months ago
2004
ACM
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...
ICALP
2005
Springer
14 years 4 months ago
2005
Springer
We consider the problem of testing the commutativity of a black-box group specified by its k generators. The complexity (in terms of k) of this problem was first considered by Pa...
IPPS
2006
IEEE
14 years 4 months ago
2006
IEEE
This paper exploits a previously developed analytical modeling framework to compare several variations of the basic flooding search strategy in unstructured decentralized peer-to...