DocumentCode :
871964
Title :
Access to indexed hierarchical databases using a relational query language
Author :
Chung, Chin-Wan ; McCloskey, Kenneth E.
Author_Institution :
General Motors Res. Lab., Warren, MI, USA
Volume :
5
Issue :
1
fYear :
1993
fDate :
2/1/1993 12:00:00 AM
Firstpage :
155
Lastpage :
161
Abstract :
An efficient means of accessing indexed hierarchical databases using a relational query language is presented. The purpose is to achieve an effective sharing of heterogeneous distributed databases. Translation of hierarchical data to an equivalent relational data definition, translation of a relational query language statement to an equivalent program that can be processed by a hierarchical database management system, and automatic selection of secondary indexes of hierarchical databases are investigated. A major portion of the result has been implemented, and the performance of the implemented system is analyzed. The performance of the system is satisfactory for a wide range of test data and test queries. It is shown that the utilization of the secondary index significantly enhances the efficiency in accessing hierarchical databases
Keywords :
distributed databases; query languages; relational databases; heterogeneous distributed databases; indexed hierarchical databases; relational query language; secondary indexes; test data; test queries; Database languages; Database systems; Distributed databases; Indexes; Object oriented modeling; Performance analysis; Prototypes; Relational databases; Standards organizations; System testing;
fLanguage :
English
Journal_Title :
Knowledge and Data Engineering, IEEE Transactions on
Publisher :
ieee
ISSN :
1041-4347
Type :
jour
DOI :
10.1109/69.204099
Filename :
204099
Link To Document :
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