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OSQL

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Encyclopedia of Database Systems

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Definition

OSQL [1, 2] is an functional query language and data model similar to Daplex, first implemented in the Iris DBMS [4]. The data model of OSQL is object oriented with three kinds of system entities: objects, types, and functions. A database consists of a set of objects, the objects are classified into types, and functions define the semantics of types. The data model is similar to an ER model with the difference that both entity relationships and attributes are represented as functions and that (multiple) inheritance among entity types is supported. OSQL provide object identifiers (OIDs) as first class objects, and, unlike Daplex, queries can return OIDs in results. Queries are expressed using a SELECT syntax similar to SQL. Derived functions are also defined using select statements similar to functions in SQL-2003.

Key Points

With the OSQL data model a database consists of a set of objects. The objects are classified into subsets by types and each type has an extent...

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Recommended Reading

  1. Beech D. A foundation of evolution from relational to object databases. In Advances in database technology. In: Proceedings of the 1st international conference on extending database technology. 1988. p. 251–70.

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  2. Fishman DH, Beech D, Cate HP, Chow EC, Connors T, Davis JW, Derrett N, Hoch CG, Kent W, Lyngbaek P, Mahbod B, Neimat MA, Ryan TA, Shan Iris MC. An object-oriented database management system. ACM Trans Off Inf Syst. 1987;5(1):48–69.

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  3. Risch T, Josifovski V, Katchaounov T. Functional data integration in a distributed mediator system. In: Gray P, Kerschberg L, King P, Poulovassilis A, editors. Functional approach to data management – modeling, analyzing and integrating heterogeneous data. Berlin: Springer; 2003.

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  4. Wilkinson K, Lyngbaek P, Hasan W. The iris architecture and implementation. IEEE Trans Knowl Data Eng. 1990;2(1):63–75.

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Authors and Affiliations

  1. Department of Information Technology, Uppsala University, Box 337, SE-751 05, Uppsala, Sweden

    Tore Risch

Authors
  1. Tore Risch
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Correspondence to Tore Risch .

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Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, Georgia, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, Ontario, Canada

    M. Tamer Özsu

Section Editor information

  1. Dept. of Inf. Technology, Uppsala Univ., Box 337, SE-751 05, Uppsala, Sweden

    Tore Risch

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© 2016 Springer Science+Business Media LLC

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Risch, T. (2016). OSQL. In: Liu, L., Özsu, M. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4899-7993-3_1109-2

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  • DOI: https://doi.org/10.1007/978-1-4899-7993-3_1109-2

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  • Publisher Name: Springer, New York, NY

  • Online ISBN: 978-1-4899-7993-3

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