E3S Web Conf.
Volume 164, 2020Topical Problems of Green Architecture, Civil and Environmental Engineering 2019 (TPACEE 2019)
|Number of page(s)||8|
|Section||Environmental Planning and Management|
|Published online||05 May 2020|
Programmatic implementation of the Dijkstra algorithm in the Transact-SQL language using relational algebra
Don state technical university, chairs Computing systems and information security, 1, Gagarin square, 344000, Rostov-on-Don, Russia
* Corresponding author: firstname.lastname@example.org
The article is devoted to the topical issue of data processing in the database management systems. It presents a solution to the problem of finding paths in a graph using Dijkstra’s algorithm, set as a sequence of relational operations and functions of the Transact-SQL language. The efficiency of the known information system architectures and the impact of various ways of distributing functions between system components are reviewed. The article describes features of the relational algebra and the Transact-SQL operations, and provides a brief description of Dijkstra’s algorithm. For its programmatic implementation, several stages are defined, for each of which a formal description of the relational operations performed on it is given. The outputs of these operations are shown using the example of the database tables, and the algorithm to find the final path is given. The issues of the proposed method’s productivity and security of programmatic implementation of the path search in a graph are discussed separately.
© The Authors, published by EDP Sciences 2020
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