OQL: A Query Language for Manipulating Object-oriented Databases.

A. M. Alashqur, Stanley Y. W. Su, Herman Lam: OQL: A Query Language for Manipulating Object-oriented Databases. VLDB 1989: 433-442

@inproceedings{DBLP:conf/vldb/AlashqurSL89,
  author    = {A. M. Alashqur and
               Stanley Y. W. Su and
               Herman Lam},
  editor    = {Peter M. G. Apers and
               Gio Wiederhold},
  title     = {OQL: A Query Language for Manipulating Object-oriented Databases},
  booktitle = {Proceedings of the Fifteenth International Conference on Very
               Large Data Bases, August 22-25, 1989, Amsterdam, The Netherlands},
  publisher = {Morgan Kaufmann},
  year      = {1989},
  isbn      = {1-55860-101-5},
  pages     = {433-442},
  ee        = {db/conf/vldb/AlashqurSL89.html},
  crossref  = {DBLP:conf/vldb/89},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

An essential property which is desirable in a query language designed for a certain data model is that queries issued in that language must produce results that are structured and modeled using the same data model. A consequence of maintaining this property in a query language is that the result of a query can be used as an operand in some other query (or queries) or can bs saved as a user's view. Existing query languages that have been designed for the class of object-oriented data models do not posses this property. In this paper, we introduce the object-oriented query language (OQL), which maintains this property. An OQL query is considered as a function, which when applied to a database, returns a subdatabase whose structure consists of some selected object classes and their associations. The objects that satisfy the search conditions and participate in the patterns of object associations specified in the query constitute the eXtension of the resulting subdatabase. A subdatabase forms a "context" under which systemdefined and/or user defined operations can be specified and performsd. Several advanced features such as branching association patterns and set operations on subdatabases are also presented.

Copyright © 1989 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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Printed Edition

Peter M. G. Apers, Gio Wiederhold (Eds.): Proceedings of the Fifteenth International Conference on Very Large Data Bases, August 22-25, 1989, Amsterdam, The Netherlands. Morgan Kaufmann 1989, ISBN 1-55860-101-5

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