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» Optimization strategies for complex queries
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VLDB
1998
ACM
82views Database» more  VLDB 1998»
15 years 10 months ago
Reducing the Braking Distance of an SQL Query Engine
In a recent paper, we proposed adding a STOP AFTER clause to SQL to permit the cardinality of a query result to be explicitly limited by query writers and query tools. We demonstr...
Michael J. Carey, Donald Kossmann
PVLDB
2008
104views more  PVLDB 2008»
15 years 6 months ago
Scalable multi-query optimization for exploratory queries over federated scientific databases
The diversity and large volumes of data processed in the Natural Sciences today has led to a proliferation of highlyspecialized and autonomous scientific databases with inherent a...
Anastasios Kementsietsidis, Frank Neven, Dieter Va...
SIGMOD
2006
ACM
232views Database» more  SIGMOD 2006»
16 years 6 months ago
High-performance complex event processing over streams
In this paper, we present the design, implementation, and evaluation of a system that executes complex event queries over real-time streams of RFID readings encoded as events. The...
Eugene Wu 0002, Yanlei Diao, Shariq Rizvi
AAAI
2006
15 years 8 months ago
Characterizing Data Complexity for Conjunctive Query Answering in Expressive Description Logics
Description Logics (DLs) are the formal foundations of the standard web ontology languages OWL-DL and OWL-Lite. In the Semantic Web and other domains, ontologies are increasingly ...
Magdalena Ortiz, Diego Calvanese, Thomas Eiter
SISAP
2008
IEEE
130views Data Mining» more  SISAP 2008»
16 years 1 months ago
The Many Facets of Approximate Similarity Search
In this article, we review the major paradigms for approximate similarity queries and propose a classification schema that easily allows existing approaches to be compared along ...
Marco Patella, Paolo Ciaccia