350 search results - page 7 / 70 » An optimization framework for map-reduce queries |
126
Voted
SIGMOD
1993
ACM
15 years 4 months ago
1993
ACM
Abstract: We propose a framework for the specification of extensible database systems. A particular goal is to implement a software component for parsing and rule-based optimizatio...
106
Voted
PODS
2004
ACM
16 years 15 days ago
2004
ACM
The problem of deciding query containment has important applications in classical query optimization and heterogeneous database systems. Query containment is undecidable for unres...
115
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JPDC
2011
14 years 7 months ago
2011
As data volumes increase at a high speed in more and more application fields of science, engineering, information services, etc., the challenges posed by data-intensive computing...
169
Voted
SIGMOD
2005
ACM
16 years 16 days ago
2005
ACM
This paper introduces RankSQL, a system that provides a systematic and principled framework to support efficient evaluations of ranking (top-k) queries in relational database syst...
DASFAA
2004
IEEE
15 years 4 months ago
2004
IEEE
Iceberg queries are a special case of SQL queries involving GROUP BY and HAVING clauses, wherein the answer set is small relative to the database size. We present here a performanc...