ACM SIGMOD Anthology VLDB dblp.uni-trier.de

Supporting Lists in a Data Model (A Timely Approach).

Joel E. Richardson: Supporting Lists in a Data Model (A Timely Approach). VLDB 1992: 127-138
@inproceedings{DBLP:conf/vldb/Richardson92,
  author    = {Joel E. Richardson},
  editor    = {Li-Yan Yuan},
  title     = {Supporting Lists in a Data Model (A Timely Approach)},
  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     = {127-138},
  ee        = {db/conf/vldb/Richardson92.html},
  crossref  = {DBLP:conf/vldb/92},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

This paper considers the problem of adding list as a type constructor toan object-oriented data model. In particular, we are concerned with how lists in a database can be constructedand how they can be queried. We propose that operators from a discrete, linear-time temporal logic provide anatural basis for making assertions about the ordering of elements in a list. We then show how such assertions may be incorporated into a query algebra by extending the Melampus Data Model (MDM) with a list type constructor and by allowing temporal assertions as predicates on lists. The extended algebra allows the expression of a significantly larger class of queries than previously possible. Furthermore, temporal operators provide a basis for creating new lists that satisfy desired ordering properties. For example, sorting is shown to fall out as a special case. This paper also describes a new framework based on Boolean circuits for evaluating the truth of an assertion on a given list. This framework provides many opportunities for optimization and parallelism, and it lends insight to the meaning and complexity of a temporal formula.

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.


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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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