Abstract
Object oriented programming languages as well as persistent object systems are usually accessed by explicit navigation along the relations (i.e. the pointers) between the objects. End users of a ”database”, however, prefer to have a query language, which allows them to specify database queries regardless of the mechanism that is used to navigate through the database. In this paper we show a simple technique for adding a query language to an object-oriented programming language. We translate the query, in our case an OQL query, into a program and execute this resulting program. So an ordinary program offers the results of the queries. The compilation and execution is done ”on the fly”, which means that the user is not aware of the translation. In this paper we present how the translator works, how to write such a translator, and the advantages of our chosen method.
Markus Knasmüller is on leave from Johannes Kepler University Linz, Department of Practical Computer Science (Systemsoftware).
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Knasmüller, M. (2000). On Adding a Query Language to a Persistent Object System. In: Weck, W., Gutknecht, J. (eds) Modular Programming Languages. JMLC 2000. Lecture Notes in Computer Science, vol 1897. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10722581_15
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DOI: https://doi.org/10.1007/10722581_15
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