Object-Oriented Querying of Existing Relational Databases

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2005
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Kriegel, Hans-Peter
Miethsam, Andreas
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MAŘÍK, Vladimír, ed., Jiří LAŽANSKÝ, ed., Roland R. WAGNER, ed.. Database and Expert Systems Applications. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005, pp. 325-336. Lecture Notes in Computer Science. 720. ISBN 978-3-540-57234-3. Available under: doi: 10.1007/3-540-57234-1_29
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In this paper, we present algorithms which allow an object-oriented querying of existing relational databases. Our goal is to provide an improved query interface for relational systems with better query facilities than SQL. This seems to be very important since, in real world applications, relational systems are most commonly used and their dominance will remain in the near future. To overcome the drawbacks of relational systems, especially the poor query facilities of SQL, we propose a schema transformation and a query translation algorithm. The schema transformation algorithm uses additional semantic information to enhance the relational schema and transform it into a corresponding object-oriented schema. If the additional semantic information can be deducted from an underlying entity-relationship design schema, the schema transformation may be done fully automatically. To query the created object-oriented schema, we use the Structured Object Query Language (SOQL) which provides declarative query facilities on objects. SOQL queries using the created object-oriented schema are much shorter, easier to write and understand and more intuitive than corresponding SQL queries leading to an enhanced usability and an improved querying of the database. The query translation algorithm automatically translates SOQL queries into equivalent SQL queries for the original relational schema.

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ISO 690KEIM, Daniel A., Hans-Peter KRIEGEL, Andreas MIETHSAM, 2005. Object-Oriented Querying of Existing Relational Databases. In: MAŘÍK, Vladimír, ed., Jiří LAŽANSKÝ, ed., Roland R. WAGNER, ed.. Database and Expert Systems Applications. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005, pp. 325-336. Lecture Notes in Computer Science. 720. ISBN 978-3-540-57234-3. Available under: doi: 10.1007/3-540-57234-1_29
BibTex
@inproceedings{Keim2005-05-27Objec-5908,
  year={2005},
  doi={10.1007/3-540-57234-1_29},
  title={Object-Oriented Querying of Existing Relational Databases},
  number={720},
  isbn={978-3-540-57234-3},
  publisher={Springer Berlin Heidelberg},
  address={Berlin, Heidelberg},
  series={Lecture Notes in Computer Science},
  booktitle={Database and Expert Systems Applications},
  pages={325--336},
  editor={Mařík, Vladimír and Lažanský, Jiří and Wagner, Roland R.},
  author={Keim, Daniel A. and Kriegel, Hans-Peter and Miethsam, Andreas}
}
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