651 search results - page 90 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
DAGSTUHL
2004
13 years 10 months ago
2004
We present the Priority R-tree, or PR-tree, which is the first R-tree variant that always answers a window query using O((N/B)1-1/d + T/B) I/Os, where N is the number of ddimensio...
SIGMOD
2008
ACM
14 years 9 months ago
2008
ACM
We demonstrate XRPC, a minimal XQuery extension that enables distributed querying between heterogeneous XQuery engines. The XRPC language extension enhances the existing concept o...
EDBT
2009
ACM
14 years 3 months ago
2009
ACM
Materialized views (MV) can significantly improve the query performance of relational databases. In this paper, we consider MVs to optimize complex scenarios where many heterogen...
EUROPAR
2008
Springer
13 years 10 months ago
2008
Springer
We present a distributed index data structure and algorithms devised to support parallel query processing of multimedia content in search engines. We present a comparative study wi...
ICDCSW
2003
IEEE
14 years 2 months ago
2003
IEEE
—One of the principal characteristics of large scale wireless sensor networks is their distributed, multi-hop nature. Due to this characteristic, applications such as query propa...