1160 search results - page 108 / 232 » Query Processing and Optimization for Pictorial Query Trees |
121
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WWW
2007
ACM
16 years 2 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...
131
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SIGMOD
2006
ACM
15 years 7 months ago
2006
ACM
Although approximate query processing is a prominent way to cope with the requirements of data analysis applications, current database systems do not provide integrated and compre...
131
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ICDE
2005
IEEE
15 years 7 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
CIKM
2009
Springer
15 years 6 months ago
2009
Springer
Tree patterns represent important fragments of XPath. In this paper, we show that some classes of tree patterns exhibit such a property that, given a finite number of tree patter...
104
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SIGMOD
2001
ACM
16 years 1 months ago
2001
ACM
Estimating the result size of complex queries that involve selection on multiple attributes and the join of several relations is a difficult but fundamental task in database query...