651 search results - page 41 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
ICDE
2005
IEEE
14 years 2 months ago
2005
IEEE
— XQuery, the defacto XML query language, is a functional language with operational semantics, which precludes the direct application of classical query optimization techniques. ...
DEXA
2004
Springer
14 years 2 months ago
2004
Springer
Data integration is a significant challenge: relevant data objects are split across multiple information sources, and often owned by different organizations. The sources represent...
VLDB
1989
ACM
14 years 1 months ago
1989
ACM
This paper presents a parallel algorithm for recursive query processing and shows how it can be efficiently implemented in a local computer network. The algorithm relies on an int...
SIGMOD
2002
ACM
13 years 8 months ago
2002
ACM
Traditional query processors generate full, accurate query results, either in batch or in pipelined fashion. We argue that this strict model is too rigid for exploratory queries o...
VLDB
2004
ACM
14 years 2 months ago
2004
ACM
We study the fundamental limitations of relational algebra (RA) and SQL in supporting sequence and stream queries, and present effective query language and data model enrichments ...