Incomplete Information in Relational Temporal Databases.
Shashi K. Gadia, Sunil S. Nair, Yiu-Cheong Poon:
Incomplete Information in Relational Temporal Databases.
VLDB 1992: 395-406@inproceedings{DBLP:conf/vldb/GadiaNP92,
author = {Shashi K. Gadia and
Sunil S. Nair and
Yiu-Cheong Poon},
editor = {Li-Yan Yuan},
title = {Incomplete Information in Relational Temporal Databases},
booktitle = {18th International Conference on Very Large Data Bases, August
23-27, 1992, Vancouver, Canada, Proceedings},
publisher = {Morgan Kaufmann},
year = {1992},
isbn = {1-55860-151-1},
pages = {395-406},
ee = {db/conf/vldb/GadiaNP92.html},
crossref = {DBLP:conf/vldb/92},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX
Abstract
For the conventional relational model there has been considerable research in the area of incomplete information.
On the other hand, research in temporal databases has concentrated on models inwhich complete historical information is needed.
However, the likelihood of missing information in temporal databases is greaterbecause of the vast amount of information.
Hence, a mechanism must be provided to store and query incomplete temporal information.
In this paper we present a model for incomplete information in temporal databases.
The model generalizes our previous model for complete temporal information.
It is shown that our relational operators produce results that are reliable.
We also show, with some exceptions, that if the definitions of the operators were strengthened to give more information, we may obtain results that are not reliable.
Copyright © 1992 by the VLDB Endowment.
Permission to copy without fee all or part of this material is granted provided that the copies are not made or
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is by the permission of the Very Large Data Base
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a fee and/or special permission from the Endowment.
Online Paper
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BibTeX
Printed Edition
Li-Yan Yuan (Ed.):
18th International Conference on Very Large Data Bases, August 23-27, 1992, Vancouver, Canada, Proceedings.
Morgan Kaufmann 1992, ISBN 1-55860-151-1
Contents BibTeX
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Referenced by
- Curtis E. Dyreson, Richard T. Snodgrass:
Supporting Valid-Time Indeterminacy.
ACM Trans. Database Syst. 23(1): 1-57(1998)
- Shashi K. Gadia, Sunil S. Nair:
Algebraic Identities and Query Optimization in a Parametric Model for Relational Temporal Databases.
IEEE Trans. Knowl. Data Eng. 10(5): 793-807(1998)
- Ouri Wolfson, Bo Xu, Sam Chamberlain, Liqin Jiang:
Moving Objects Databases: Issues and Solutions.
SSDBM 1998: 111-122
- James Clifford, Curtis E. Dyreson, Tomás Isakowitz, Christian S. Jensen, Richard T. Snodgrass:
On the Semantics of "Now" in Databases.
ACM Trans. Database Syst. 22(2): 171-214(1997)
- Gultekin Özsoyoglu, Richard T. Snodgrass:
Temporal and Real-Time Databases: A Survey.
IEEE Trans. Knowl. Data Eng. 7(4): 513-532(1995)
- Manolis Koubarakis:
Representation and Querying in Temporal Databases: the Power of Temporal Constraints.
ICDE 1993: 327-334
- Curtis E. Dyreson, Richard T. Snodgrass:
Valid-time Indeterminancy.
ICDE 1993: 335-343
BibTeX
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