Functional querying in graph databases
Vietnam J. Computer Science(2017)
摘要
The paper is focused on a functional querying in graph databases. We consider labelled property graph model and mention also the graph model behind XML databases. An attention is devoted to functional modelling of graph databases both at a conceptual and data level. The notions of graph conceptual schema and graph database schema are considered. The notion of a typed attribute is used as a basic structure both on the conceptual and database level. As a formal approach to declarative graph database querying a version of typed lambda calculus is used. This approach allows to use a logic necessary for querying, arithmetic as well as aggregation function. Another advantage is the ability to deal with relations and graphs in one integrated environment.
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关键词
Graph database, Querying graph database, Graph database schema, Graph conceptual schema, Functional graph database schema, Functional graph database, Typed lambda calculus, Language of terms, XML graph
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