On the Recognition and Design of Acyclic Databases.
Alessandro D'Atri, Marina Moscarini:
On the Recognition and Design of Acyclic Databases.
PODS 1984: 1-8@inproceedings{DBLP:conf/pods/DAtriM84,
author = {Alessandro D'Atri and
Marina Moscarini},
editor = {Daniel J. Rosenkrantz and
Ronald Fagin},
title = {On the Recognition and Design of Acyclic Databases},
booktitle = {Proceedings of the Third ACM SIGACT-SIGMOD Symposium on Principles
of Database Systems, April 2-4, 1984, Waterloo, Ontario, Canada},
publisher = {ACM},
year = {1984},
isbn = {0-89791-128-8},
pages = {1-8},
ee = {http://doi.acm.org/10.1145/588011.588013, db/conf/pods/DAtriM84.html},
crossref = {DBLP:conf/pods/84},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
Abstract
The acyclicity degree of a relational database scheme is an interesting topic due to several desirable properties of the corresponding database [5,16]. In this paper a simple and homogeneous way to characterize the acyclicity degree of a database scheme is given. The method is based on the existence in all acyclic database schemes of a nonempty set of relation schemes that satisfy a "pruning predicate", which is a property similar to the property satisfied by the leaves in an ordinary tree. This fact implies that such relation schemes may be eliminated using a recursive pruning algorithm in order to determine the acyclicity degree. Furthermore, if we use an incremental step by step design methodology, enriching the scheme one relation at a time, the pruning predicate suggests a set of properties that have to be verified by the new relation scheme in order to preserve the acyclicity degree of the database scheme.
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Daniel J. Rosenkrantz, Ronald Fagin (Eds.):
Proceedings of the Third ACM SIGACT-SIGMOD Symposium on Principles of Database Systems, April 2-4, 1984, Waterloo, Ontario, Canada.
ACM 1984, ISBN 0-89791-128-8
Contents 
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