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neo4jneo4j-apoc

neo4j apoc.algo.dijkstra '<' or '>' or '|' indicators

In the neo4j APOC procedures there's apoc.algo.dijkstra algorithm and it is structured like: apoc.algo.dijkstra(start, end, 'RELATIONSHIP', 'attribute'), and I know that in the RELATIONSHIP argument you can include things like '<' or '>' or '|' indicators. But I do not know what they mean or what they do.

Solution

  • The name of that parameter is relationshipTypesAndDirections. < means incoming relationship, > means outgoing relationship, | is the OR logical operator.

    For example:

    KNOWS|<WORKS_WITH|IS_MANAGER_OF>

    That means the pathfinding algorithm will look for KNOWS relationship in any direction, incoming WORKS_WITH relationship, or outgoing IS_MANAGER_OF relationship.