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Regular path query information


In databases and specifically in graph databases, a regular path query[1] or RPQ is a query asking for pairs of endpoints in the database that are connected by a path satisfying a certain regular expression. A similar feature exists in the SPARQL query language as "property paths"

  1. ^ Calvanese, D.; De Giacomo, G.; Lenzerini, M.; Vardi, M.Y. (2000). Answering regular path queries using views. pp. 389–398. doi:10.1109/ICDE.2000.839439. ISBN 0-7695-0506-6. Retrieved 2024-01-18.

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Regular path query

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"Pathlen", "Path"; SYS_CONNECT_BY_PATH Datalog also implements fixpoint queries Regular path queries are a specific kind of recursive query in graph databases...

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queries, conjunctive queries, unions of conjunctive queries, Datalog, regular path queries, etc., up to logical formalisms like first-order logic or monadic...

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query language for RDF databases that can retrieve and manipulate data stored in RDF format regular path queries, a theoretical language for queries on...

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and a python version of the web object query language, WOQLpy. GraphQL is implemented to allow users to query TerminusDB projects in such a way that deep...

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In query languages, path expressions identify an object by describing how to navigate to it in some graph (possibly implicit) of objects. For example...

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query strings containing a unique session identifier to all the links inside of a web page. When the user follows a link, the browser sends the query...

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PostgreSQL

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(RDBMS), or a web service. This means that regular database queries can use these data sources like regular tables, and even join multiple data-sources...

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Rochester, N. Y., responded to Query, by W.E. Heal, Wheeling, Indiana in The Analyst in the year 1877: "To construct a regular polygon of seventeen sides...

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asterisk is also known as the Kleene star. glob (programming) Pattern matching Query by Example Wildcard DNS record wildmat "Using wildcard characters". Microsoft...

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use of mutable data. In the partial persistence model, a programmer may query any previous version of a data structure, but may only update the latest...

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can query a catalog on a remote machine by specifying a UNC path. Programmers specify the criteria for searches using SQL-like syntax. The SQL query can...

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processor able to handle that kind of URL path and to pass to it other URL parts, i.e. usually path-info and query string variables. One or more configuration...

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systems, in the sense that any computer model should support all geometric queries that may be asked of its corresponding physical object. The requirement...

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local queries be handled? Local queries use the regular query algorithm of the contraction hierarchy. Shortest path problem Hub labels Bidirectional...

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since SQL does not support nested tables. The automated evaluation of any query relating to customers' transactions would broadly involve two stages: Unpacking...

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