在Neo4j中用Cypher设置null值

Question

I am trying to set a null value for a property when I create a node.

I tried something like this:

CREATE(p:Person {p_id: TOINT(line.`id`) })
SET p.initials = null

But that gives me Neo.ClientError.Statement.SyntaxError .

How can I set a null value with CQL in Neo4j?

Answer 1

I don't think that you error comes from setting a property to null, but on the TOINT function. Cypher is case-sensitive, and the correct syntax is toInt. So your query should looks like this :

CREATE(p:Person {p_id: toInt(line.`id`) })
SET p.initials = null

Moreover, Neo4j doesn't store null value. A null value, is a property that doesn't exist.

Answer 2

In Neo4j you can't set null to property that way. But to get the same result you can remove the property for the given node. You can learn more about removing properties in neo4j docs