173 search results - page 33 / 35 » Optimization of Continuous Queries in Federated Database and... |
VLDB
2004
ACM
14 years 25 days ago
2004
ACM
The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably lo...
ICDE
2005
IEEE
14 years 8 months ago
2005
IEEE
Query processing in traditional information management systems has moved from an exact match model to more flexible paradigms allowing cooperative retrieval by aggregating the dat...
VLDB
2007
ACM
14 years 7 months ago
2007
ACM
We present STAR, a self-tuning algorithm that adaptively sets numeric precision constraints to accurately and efficiently answer continuous aggregate queries over distributed data...
SIGMOD
2005
ACM
14 years 7 months ago
2005
ACM
While traditional database systems optimize for performance on one-shot queries, emerging large-scale monitoring applications require continuous tracking of complex aggregates and...
VLDB
2002
ACM
13 years 7 months ago
2002
ACM
Complex database queries require the use of memory-intensive operators like sort and hashjoin. Those operators need memory, also referred to as SQL memory, to process their input ...