148 search results - page 21 / 30 » Query Selectivity Estimation for Uncertain Data |
SIGMOD
1994
ACM
13 years 11 months ago
1994
ACM
We describe an algorithm for estimating the number of page fetches for a partial or complete scan of a B-tree index. The algorithm obtains estimates for the number of page fetches ...
CVPR
2010
IEEE
14 years 3 months ago
2010
IEEE
A framework is presented for estimating the pose of a camera based on images extracted from a single omnidirectional image of an urban scene, given a 2D map with building outlines...
ILP
2003
Springer
14 years 21 days ago
2003
Springer
Query optimization is used frequently in relational database management systems. Most existing techniques are based on reordering the relational operators, where the most selective...
DEXAW
2007
IEEE
13 years 9 months ago
2007
IEEE
Due to the lack of efficient native XML database management systems, XML data manipulation and query evaluation may be resource-consuming, and represent a bottleneck for several ...
ICDE
2010
IEEE
14 years 2 months ago
2010
IEEE
— We demonstrate ROX, a run-time optimizer of XQueries, that focuses on finding the best execution order of XPath steps and relational joins in an XQuery. The problem of join or...