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Auflistung nach Autor:in "Graupmann, Jens"

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  • Konferenzbeitrag
    Bring Your Language to Your Data with EXASOL
    (Datenbanksysteme für Business, Technologie und Web (BTW 2017), 2017) Mandl, Stefan; Kozachuk, Oleksandr; Graupmann, Jens
    User Defined Functions (UDF) are an important feature of analytical SQL as they allow processing of data right inside of relational queries. Typically UDFs have to be written in a special language which sometimes diminishes their practical use, especially when required libraries are not available in this language. An alternative approach is to allow users to provide functions as native low-level database extensions; an approach that can be very dangerous. EXASOL now follows a radically different approach by allowing to integrate any programming language with the database without affecting data integrity: UDF language implementations are encapsulated within Linux containers that communicate with the database engine via a straightforward protocol. Using these technologies, users can now make available their own programming language for UDFs in the database. As an example, we show how to provide C++ as a UDF language for EXASOL.
  • Konferenzbeitrag
    Towards federated search based on web services
    (BTW 2003 – Datenbanksysteme für Business, Technologie und Web, Tagungsband der 10. BTW Konferenz, 2003) Graupmann, Jens; Biwer, Michael; Zimmer, Patrick
    Some emerging trends in the recent development of the WWW can be observed. These trends are technical, like Web Services, as well as semantic, like the integration of ontologies. We propose an architecture for a new kind of federated search system, which takes these aspects and new developments into account. A major challenge in this context is to cope with portals and the data sources behind the portals, the so-called "Deep Web". One component of the proposed architecture is the service mediator, which generates wrapper classes and additional files to make portals accessible as Web Services. Other components are an onotology server, which provides Web Service based access to different ontologies and an XML Filter server that converts different source formats to XML. This loosely coupled architecture supports federated search on semistructured data and the evaluation of semantic join operations.