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A Uniform Approach to Processing Temporal Queries.

Umeshwar Dayal, Gene T. J. Wuu: A Uniform Approach to Processing Temporal Queries. VLDB 1992: 407-418
@inproceedings{DBLP:conf/vldb/DayalW92,
  author    = {Umeshwar Dayal and
               Gene T. J. Wuu},
  editor    = {Li-Yan Yuan},
  title     = {A Uniform Approach to Processing Temporal Queries},
  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     = {407-418},
  ee        = {http://www.vldb.org/conf/1992/P407.PDF},
  crossref  = {DBLP:conf/vldb/92},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

Research in temporal databases has mainly focused on defining temporal data models by extending existing models, and developing access structures for temporaldata. Little has been done on temporal query processing and optimization. In this paper, we propose a uniform framework for processing temporal queries, which builds upon well-understood techniques for processing non-temporal queries. We start with an object-oriented model, and rely on its rich type system to model complex temporal information. The same query language is used to express temporal and non-temporal queries uniformly. A major benefit to this approach is that temporal query processing can be smoothly extended from an existing (non-temporal) query processing framework. For the purpose of query processing, we describe an object algebra, into which queries are compiled. Since the object algebra resembles the relational algebra, familiar relational query optimization techniques can be used. However, since the physical representation of temporal data and access methods differ from those of non- temporal data, new algorithms must be developed to evaluate the algebraic operators. We demonstrate that temporal queries can be processed and optimized under the existing query processing framework.

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 distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.


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
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