apoc.node.relationships.exist

Function

apoc.node.relationships.exist(node NODE, relTypes STRING) - returns a BOOLEAN based on whether the given NODE has connecting RELATIONSHIP values (or whether the given NODE has connecting RELATIONSHIP values of the given type and direction).

Signature

apoc.node.relationships.exist(node :: NODE, types =  :: STRING) :: MAP

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: "Person60"})
RETURN apoc.node.relationships.exist(p1, "KNOWS|FOLLOWS") AS output;

Table 2. Results
output
{KNOWS: TRUE, FOLLOWS: FALSE}

MATCH (p1:Person {name: "Michael"})
RETURN apoc.node.relationships.exist(p1, "KNOWS>|<FOLLOWS") AS output;

Table 3. Results
output
{`KNOWS>`: TRUE, `<FOLLOWS`: FALSE}

More documentation of apoc.node.relationships.exist