<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In today’s multi-model database world there is an effort to integrate databases expressed in different data models. The aim of the article is to show possibilities of integration of relational and graph databases with the help of a functional data model and its formal language – a typed lambda calculus. We suppose the existence of a data schema both for the relational and graph database. In this approach, relations are considered as characteristic functions and property graphs as sets of single-valued and multivalued functions. Then it is possible to express a query over such integrated heterogeneous database by one query expression expressed in a version of the typed lambda calculus. A more user-friendly version of such language could serve as a powerful query tool in practice. We discuss also queries sent to the integrated system and translated into queries in SQL and Cypher - the graph query language for Neo4j.</p></abstract>

In today’s multi-model database world there is an effort to integrate databases expressed in different data models. The aim of the article is to show possibilities of integration of relational and graph databases with the help of a functional data model and its formal language – a typed lambda calculus. We suppose the existence of a data schema both for the relational and graph database. In this approach, relations are considered as characteristic functions and property graphs as sets of single-valued and multivalued functions. Then it is possible to express a query over such integrated heterogeneous database by one query expression expressed in a version of the typed lambda calculus. A more user-friendly version of such language could serve as a powerful query tool in practice. We discuss also queries sent to the integrated system and translated into queries in SQL and Cypher - the graph query language for Neo4j.

Integration of Relational and Graph Databases Functionally

Foundations of Computing and Decision Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Integration of Relational and Graph Databases Functionally"}

In today’s multi-model database world there is an effort to integrate databases expressed in different data models. The aim of the article is to show...

Integration of Relational and Graph Databases Functionally

Data publikacji: 25 lis 2019

Zakres stron: 427 - 441

Otrzymano: 06 lut 2019

Przyjęty: 10 wrz 2019

DOI: https://doi.org/10.2478/fcds-2019-0021

Słowa kluczowe
graph database, relational database, databases integration, functional database model

© 2019 Jaroslav Pokorný, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Integration of Relational and Graph Databases Functionally

Data publikacji: 25 lis 2019

Zakres stron: 427 - 441

Otrzymano: 06 lut 2019

Przyjęty: 10 wrz 2019

DOI: https://doi.org/10.2478/fcds-2019-0021

Słowa kluczowegraph database, relational database, databases integration, functional database model

© 2019 Jaroslav Pokorný, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Słowa kluczowe
graph database, relational database, databases integration, functional database model