Bibliography | Gao, Jie: Konzeption und Realisierung von Workflow-Wrappern mit SQL/MED. University of Stuttgart, Faculty of Computer Science, Diploma Thesis No. 1988 (2002). 78 pages, german.
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CR-Schema | H.2.4 (Database Management Systems) H.4.1 (Office Automation) H.3.4 (Information Storage and Retrieval Systems and Software)
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Keywords | Wrapper, Federated Database System, SQL/MED, Performance |
Abstract | Over years all sorts of applications are developed, used and rooted in an enterprise. Workflow management system (WFMS) was introduced so that a single function call at the beginning of a process will trigger a chain of application execution. Often the results returned from a workflow is desired to be further processed or stored in a database. Thus the federated database concept is introduced to integrate workflow into a database.
Wrapper and user defined function (UDF) can be applied to realise integration of WFMS to federated database. While user defined function (UDF) approach offers a compact solution of integrating workflow by invoking a single function registered in the Federated Database System (FDBS) to execute workflow, it has its structural limitations.
In this thesis, the integration is tried with help of the wrapper technology standardized by SQL Part 9 Management of External Data (SQL/MED). Since integration is done in an object oriented programming environment, SQL/MED will be projected in an object oriented perspective. How data is channeled into workflow process as parameter by wrapper and how the results are collected and converted by wrapper before delivering to federated database system will be one of the most important part of wrapper mechanism.
After the workflow wrapper is implemented, the performance issue arises as how the structural and conceptual differences between UDF and wrapper will affect them in efficiency as integration tools. A test based on a simple workflow process is made and its test results will be analysed. An opinion based on the analysis will try to be made.
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Full text and other links | PDF (396375 Bytes) Access to students' publications restricted to the faculty due to current privacy regulations |
Contact | gastie@lycos.de |
Department(s) | University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Applications of Parallel and Distributed Systems
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Entry date | July 2, 2002 |
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