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» Query Optimization in an OODBMS
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VLDB
1997
ACM
117views Database» more  VLDB 1997»
15 years 4 months ago
Optimizing Queries Across Diverse Data Sources
Businesses today need to interrelate data stored in diverse systems with differing capabilities, ideally via a single high-level query interface. We present the design of a query ...
Laura M. Haas, Donald Kossmann, Edward L. Wimmers,...
SIGMOD
2001
ACM
124views Database» more  SIGMOD 2001»
15 years 12 months ago
Query Optimization In Compressed Database Systems
Over the last decades, improvements in CPU speed have outpaced improvements in main memory and disk access rates by orders of magnitude, enabling the use of data compression techn...
Zhiyuan Chen, Johannes Gehrke, Flip Korn
VLDB
2005
ACM
103views Database» more  VLDB 2005»
15 years 5 months ago
Semantic Query Optimization for XQuery over XML Streams
We study XML stream-specific schema-based optimization. We assume a widely-adopted automata-based execution model for XQuery evaluation. Criteria are established regarding what s...
Hong Su, Elke A. Rundensteiner, Murali Mani
SIGMOD
2004
ACM
121views Database» more  SIGMOD 2004»
15 years 12 months ago
An Optimal Algorithm for Querying Tree Structures and its Applications in Bioinformatics
Trees and graphs are widely used to model biological databases. Providing efficient algorithms to support tree-based or graph-based querying is therefore an important issue. In th...
Hsiao-Fei Liu, Ya-Hui Chang, Kun-Mao Chao
ADC
2007
Springer
107views Database» more  ADC 2007»
15 years 6 months ago
A Processing Model for the Optimal Querying of Encrypted XML Documents in XQuery
XQuery is a powerful and convenient language that is designed for querying the data in XML documents. In this paper, we address how to optimally query encrypted XML documents usin...
Tao-Ku Chang, Gwan-Hwan Hwang