apoc.node.relationship.exists

Function APOC Core

apoc.node.relationship.exists(node, rel-direction-pattern) - returns true when the node has the relationships of the pattern

Signature

apoc.node.relationship.exists(node :: NODE?, types =  :: STRING?) :: (BOOLEAN?)

Input parameters

Name	Type	Default
node	NODE?	null
types	STRING?

Name

Type

Default

node

NODE?

null

types

STRING?

Usage Examples

The examples in this section are based on the following sample graph:

MERGE (michael:Person {name: "Michael"})
WITH michael
CALL {
    WITH michael
    UNWIND range(0, 100) AS id
    MERGE (p:Person {name: "Person" + id})
    MERGE (michael)-[:KNOWS]-(p)
    RETURN count(*) AS friends
}

CALL {
    WITH michael
    UNWIND range(0, 50) AS id
    MERGE (p:Person {name: "Person" + id})
    MERGE (michael)-[:FOLLOWS]-(p)
    RETURN count(*) AS follows
}

RETURN friends, follows;

Table 1. Results
friends	follows
101	51

MATCH (p1:Person {name: "Michael"})
RETURN apoc.node.relationship.exists(p1) AS output;

Table 2. Results
output
TRUE

MATCH (p1:Person {name: "Person40"})
RETURN apoc.node.relationship.exists(p1, "FOLLOWS>") AS output;

Table 3. Results
output
FALSE

MATCH (p1:Person {name: "Person40"})
RETURN apoc.node.relationship.exists(p1, "<FOLLOWS") AS output;

Table 4. Results
output
TRUE

More documentation of apoc.node.relationship.exists