407 search results - page 1 / 82 » Query Estimation by Adaptive Sampling |
ICDE
2002
IEEE
14 years 5 months ago
2002
IEEE
The ability to provide accurate and efficient result estimations of user queries is very important for the query optimizer in database systems. In this paper, we show that the tra...
PODS
2000
ACM
13 years 8 months ago
2000
ACM
An estimation algorithm for a query is a probabilistic algorithm that computes an approximation for the size (number of tuples) of the query. One class of estimation algorithms us...
SIGIR
2006
ACM
13 years 10 months ago
2006
ACM
We present an adaptive distributed query-sampling framework that is quality-conscious for extracting high-quality text database samples. The framework divides the query-based samp...
TREC
2001
13 years 5 months ago
2001
We used the YFILTER filtering system for experiments on updating profiles and setting thresholds. We developed a new method of using language models for updating profiles that is ...
ADC
2007
Springer
13 years 10 months ago
2007
Springer
Histograms are used extensively for selectivity estimation and approximate query processing. Workloadaware dynamic histograms can self-tune itself based on query feedback without ...