A query processing strategy for replication in heterogeneousdatabases
Yaw-Huei Chen
Ching-Chiu Huang
Dept. of Manage. Inf. Syst., Nat. Pingtung Polytech. Inst.;
This paper appears in: Systems, Man, and Cybernetics, 1996., IEEE International Conference on
Publication Date: 14-17 Oct 1996
Volume: 2,
On page(s): 965-970 vol.2
Meeting Date: 10/14/1996 - 10/17/1996
Location: Beijing, China
ISBN: 0-7803-3280-6
References Cited: 18
INSPEC Accession Number: 5490626
Digital Object Identifier: 10.1109/ICSMC.1996.571204
Current Version Published: 2002-08-06
Abstract
It is becoming increasingly important to manage preexisting
autonomous databases as a repository resource. However, since the same
entity in the real world may be modeled by different pre-existing
databases, some data are replicated at different sites. In this
research, we provide a new reference architecture for heterogeneous
database systems. Based on this architecture, we propose a two-phase
query processing strategy to determine the sites from which the query
retrieves the replicated data. In the first phase, we use a
pattern-based query processing technique to identify objects that
satisfy the specified global query. Then in the second phase, we select
the best sites to retrieve the data. Examples are used to illustrate the
heuristic rules proposed in this paper
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