79 search results - page 8 / 16 » Optimizing Queries on Compressed Bitmaps |
109
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ADHOCNOW
2008
Springer
14 years 10 months ago
2008
Springer
This paper presents a novel method for optimizing sliding window based continuous queries. We deal with two categories of aggregation operations: stepwise aggregation (e.g. COUNT) ...
151
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SIGMOD
2009
ACM
15 years 9 months ago
2009
ACM
The ParAccel Analytic DatabaseTM is a fast shared-nothing parallel relational database system with a columnar orientation, adaptive compression, memory-centric design, and an enha...
61
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DCC
2006
IEEE
15 years 9 months ago
2006
IEEE
Abstract. We propose measures for compressed data structures, in which space usage is measured in a data-aware manner. In particular, we consider the fundamental dictionary problem...
ESA
2010
Springer
14 years 10 months ago
2010
Springer
As sensor networks increase in size and number, efficient techniques are required to process the very large data sets that they generate. Frequently, sensor networks monitor object...
SIGMOD
1999
ACM
15 years 1 months ago
1999
ACM
The database query optimizer requires the estimation of the query selectivity to find the most efficient access plan. For queries referencing multiple attributes from the same rel...