Neo4j非恒定的限制

Question

我想问问是否可以用非常量限制查询的一部分返回的节点，这意味着-我希望限制依赖于查询返回的某些变量，例如邻居节点计数的30％。

Answer 1

It's a bit ugly, but what about something like this?

MATCH n-[:type]->(neighbor)
WITH n, toInt(count(neighbor) * 0.3) AS limit
MATCH n-[:type]->(neighbor)
WITH n, collect(neighbor)[1..limit] AS neighbors
UNWIND neighbors AS neighbor
RETURN n, neighbor