589 search results - page 41 / 118 » Optimized Query Evaluation Using Cooperative Sorts |
EDBT
2008
ACM
15 years 10 months ago
2008
ACM
Abstract. Monitoring aggregates on IP traffic data streams is a compelling application for data stream management systems. Often, such streaming aggregation queries involve joining...
VLDB
2004
ACM
15 years 3 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...
SIGMOD
2009
ACM
15 years 4 months ago
2009
ACM
The state of the art commercial query optimizers employ cost-based optimization and exploit dynamic programming (DP) to find the optimal query execution plan (QEP) without evalua...
WWW
2007
ACM
15 years 10 months ago
2007
ACM
This paper explores the use of social annotations to improve web search. Nowadays, many services, e.g. del.icio.us, have been developed for web users to organize and share their f...
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ICDE
2007
IEEE
15 years 11 months ago
2007
IEEE
Linear optimization queries retrieve the top-K tuples in a sliding window of a data stream that maximize/minimize the linearly weighted sums of certain attribute values. To effici...