589 search results - page 33 / 118 » Optimized Query Evaluation Using Cooperative Sorts |
162
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VLDB
2007
ACM
15 years 10 months ago
2007
ACM
The growing nature of databases, and the flexibility inherent in the SQL query language that allows arbitrarily complex formulations, can result in queries that take inordinate am...
116
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VLDB
2002
ACM
14 years 9 months ago
2002
ACM
Complex database queries require the use of memory-intensive operators like sort and hashjoin. Those operators need memory, also referred to as SQL memory, to process their input ...
ICLP
2010
Springer
15 years 1 months ago
2010
Springer
Abstract. Bottom-up evaluation is a central part of query evaluation / program execution in deductive databases. It is used after a source code optimization like magic sets or SLDm...
WWW
2008
ACM
15 years 10 months ago
2008
ACM
In this paper, we formalize the problem of Basic Graph Pattern (BGP) optimization for SPARQL queries and main memory graph implementations of RDF data. We define and analyze the c...
ICIP
2003
IEEE
15 years 11 months ago
2003
IEEE
In this paper, we evaluate and investigate two main types of relevance feedback algorithms; the Euclidean and the correlation?based approaches. In the first case, we examine heuri...