Integration of Workflows into a Federated Database System with SQL/MED
111 pages In this work, so-called federated functions are built by interconnecting function calls to different application systems in a distributed and heterogeneous environment. These federated functions are realized as workflows, whereas the activities of the workflows are responsible for invoking...
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Stuttgart, Germany, Universität Stuttgart
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ftunivstucsa:oai:informatik.uni-stuttgart.de:DIP-1888 2023-05-15T16:02:09+02:00 Integration of Workflows into a Federated Database System with SQL/MED Wagner, Ralf Anwendersoftware (IPVR) <wagnerrf@rupert.informatik.uni-stuttgart.de> 2001-04-30 application/postscript 4084544 Bytes http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=DIP-1888&engl=1 eng eng Stuttgart, Germany, Universität Stuttgart Diploma Thesis No. 1888 http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=DIP-1888&engl=1 ftp://ftp.informatik.uni-stuttgart.de/pub/library/medoc.ustuttgart_fi/DIP-1888/DIP-1888.ps Database Management Systems (CR H.2.4) Office Automation (CR H.4.1) Data Structures (CR E.1) Database Management Languages (CR H.2.3) Federated Database System Workflow Function Integration SQL/MED Text Diploma Thesis 2001 ftunivstucsa 2022-12-14T07:25:16Z 111 pages In this work, so-called federated functions are built by interconnecting function calls to different application systems in a distributed and heterogeneous environment. These federated functions are realized as workflows, whereas the activities of the workflows are responsible for invoking the single functions. The workflows will be integrated into a federated database system by means of wrappers, and table functions respectively. For the wrapper approach, the SQL/MED standard will be utilized, which provides the notion of foreign tables representing external data, i.e. in this case the result data of workflows. The standard provides an interface, which has to be used to implement wrapper executables that are responsible for supplying the foreign tables with external data. In contrast to SQL/MED, the table function approach is not based on such an elaborated standard because a standardized interface for the implementation of table function executables is missing. Only the DDL and DML for defining and accessing table functions is specified. When the FDBS receives a global SQL query referencing a foreign table or a table function, the associated wrapper executable or table function executable respectively are responsible for executing the correct workflow. The workflow then returns the result data from its execution and the executable has to convert and transform this data to correspond with the table format of the foreign table or the table function respectively. For every workflow a separate wrapper executable has to be implemented. Therefore, the wrapper executable will be structured and divided up into different components. As a result, only some of the wrapper components have to be reimplemented for each workflow. Some components of the wrapper can also be used to build the corresponding table function executable. In order to further decrease the efforts of implementing wrappers and table functions, a generation approach will be proposed, which minimizes the manual portion in implementing a ... Thesis DML Computer Science at University of Stuttgart: Publications |
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Computer Science at University of Stuttgart: Publications |
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ftunivstucsa |
language |
English |
topic |
Database Management Systems (CR H.2.4) Office Automation (CR H.4.1) Data Structures (CR E.1) Database Management Languages (CR H.2.3) Federated Database System Workflow Function Integration SQL/MED |
spellingShingle |
Database Management Systems (CR H.2.4) Office Automation (CR H.4.1) Data Structures (CR E.1) Database Management Languages (CR H.2.3) Federated Database System Workflow Function Integration SQL/MED Wagner, Ralf Integration of Workflows into a Federated Database System with SQL/MED |
topic_facet |
Database Management Systems (CR H.2.4) Office Automation (CR H.4.1) Data Structures (CR E.1) Database Management Languages (CR H.2.3) Federated Database System Workflow Function Integration SQL/MED |
description |
111 pages In this work, so-called federated functions are built by interconnecting function calls to different application systems in a distributed and heterogeneous environment. These federated functions are realized as workflows, whereas the activities of the workflows are responsible for invoking the single functions. The workflows will be integrated into a federated database system by means of wrappers, and table functions respectively. For the wrapper approach, the SQL/MED standard will be utilized, which provides the notion of foreign tables representing external data, i.e. in this case the result data of workflows. The standard provides an interface, which has to be used to implement wrapper executables that are responsible for supplying the foreign tables with external data. In contrast to SQL/MED, the table function approach is not based on such an elaborated standard because a standardized interface for the implementation of table function executables is missing. Only the DDL and DML for defining and accessing table functions is specified. When the FDBS receives a global SQL query referencing a foreign table or a table function, the associated wrapper executable or table function executable respectively are responsible for executing the correct workflow. The workflow then returns the result data from its execution and the executable has to convert and transform this data to correspond with the table format of the foreign table or the table function respectively. For every workflow a separate wrapper executable has to be implemented. Therefore, the wrapper executable will be structured and divided up into different components. As a result, only some of the wrapper components have to be reimplemented for each workflow. Some components of the wrapper can also be used to build the corresponding table function executable. In order to further decrease the efforts of implementing wrappers and table functions, a generation approach will be proposed, which minimizes the manual portion in implementing a ... |
author2 |
Anwendersoftware (IPVR) <wagnerrf@rupert.informatik.uni-stuttgart.de> |
format |
Thesis |
author |
Wagner, Ralf |
author_facet |
Wagner, Ralf |
author_sort |
Wagner, Ralf |
title |
Integration of Workflows into a Federated Database System with SQL/MED |
title_short |
Integration of Workflows into a Federated Database System with SQL/MED |
title_full |
Integration of Workflows into a Federated Database System with SQL/MED |
title_fullStr |
Integration of Workflows into a Federated Database System with SQL/MED |
title_full_unstemmed |
Integration of Workflows into a Federated Database System with SQL/MED |
title_sort |
integration of workflows into a federated database system with sql/med |
publisher |
Stuttgart, Germany, Universität Stuttgart |
publishDate |
2001 |
url |
http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=DIP-1888&engl=1 |
genre |
DML |
genre_facet |
DML |
op_source |
ftp://ftp.informatik.uni-stuttgart.de/pub/library/medoc.ustuttgart_fi/DIP-1888/DIP-1888.ps |
op_relation |
Diploma Thesis No. 1888 http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=DIP-1888&engl=1 |
_version_ |
1766397747394510848 |