路径中心的 Neo4j / Cypher 节点

Question

I have a linear path in cypher:

MATCH path = (s)-[:SOMETHING*]->(e)

What I want is the node in the middle of that path. How can I get it?

Thanks alot for you time!

Answer 1

You can use nodes(path) to get the list of nodes in the path. You can use length(path) to get its length, so:

MATCH path = (s)-[:SOMETHING*]->(e)
RETURN nodes(path)[length(path)/2] as middle

should get you your middle node.