ACM SIGMOD Anthology VLDB dblp.uni-trier.de

The Information Preserving Properties of Relational Database Transformations.

Adarsh K. Arora, C. Robert Carlson: The Information Preserving Properties of Relational Database Transformations. VLDB 1978: 352-359
@inproceedings{DBLP:conf/vldb/AroraC78,
  author    = {Adarsh K. Arora and
               C. Robert Carlson},
  editor    = {S. Bing Yao},
  title     = {The Information Preserving Properties of Relational Database
               Transformations},
  booktitle = {Fourth International Conference on Very Large Data Bases, September
               13-15, 1978, West Berlin, Germany},
  publisher = {IEEE Computer Society},
  year      = {1978},
  pages     = {352-359},
  ee        = {db/conf/vldb/AroraC78.html},
  crossref  = {DBLP:conf/vldb/78},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

Several areas of relational database research rely on techniques for transforming the schema (intention) and underlying occurrence structures (extension) of a database. In each of these areas, it is imperative to know what information from the original database is preserved by the restructuring operation. This paper examines the extent to which an important class of relational database transformations preserves information. This is accomplished in two steps. First, a formal characterization of "information content" is presented based on the set of functional and nonfunctional associations among attributes of a relational database. Second, formal conditions are presented indicating the extent to which these associations are preserved. Based on these conditions, the information preserving properties of several well-known relational transformations are described. Some problems in maintaining these properties under updates are also discussed.

Copyright © 1978 by The Institute of Electrical and Electronic Engineers, Inc. (IEEE). Abstract used with permission.


ACM SIGMOD Anthology

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S. Bing Yao (Ed.): Fourth International Conference on Very Large Data Bases, September 13-15, 1978, West Berlin, Germany. IEEE Computer Society 1978
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