303 search results - page 57 / 61 » Bitmap Index Design and Evaluation |
160
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SIGMOD
2009
ACM
15 years 10 months ago
2009
ACM
SQL tuning--the attempt to improve a poorly-performing execution plan produced by the database query optimizer-is a critical aspect of database performance tuning. Ironically, as ...
163
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SIGMOD
2009
ACM
15 years 10 months ago
2009
ACM
In this paper, we study a novel form of continuous nearest neighbor queries in the presence of obstacles, namely continuous obstructed nearest neighbor (CONN) search. It considers...
160
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SIGMOD
2007
ACM
15 years 10 months ago
2007
ACM
Two trends are converging to make the CPU cost of a table scan a more important component of database performance. First, table scans are becoming a larger fraction of the query p...
177
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SIGMOD
2006
ACM
15 years 10 months ago
2006
ACM
The reverse k-nearest neighbor (RkNN) problem, i.e. finding all objects in a data set the k-nearest neighbors of which include a specified query object, is a generalization of the...
SOSP
2007
ACM
15 years 6 months ago
2007
ACM
As users interact with the world and their peers through their computers, it is becoming important to archive and later search the information that they have viewed. We present De...