apoc.nodes.connected

Function

apoc.nodes.connected(startNode NODE, endNode NODE, types STRING) - returns true when a given NODE is directly connected to another given NODE. This function is optimized for dense nodes.

Signature

apoc.nodes.connected(start :: NODE, start :: NODE, types =  :: STRING) :: BOOLEAN

Input parameters

Name	Type	Default
start	NODE	null
start	NODE	null
types	STRING

Name

Type

Default

start

NODE

null

start

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"})
MATCH (p2:Person {name: "Person60"})
RETURN apoc.nodes.connected(p1, p2) AS output;

Table 2. Results
output
TRUE

MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person60"})
RETURN apoc.nodes.connected(p1, p2, "FOLLOWS") AS output;

Table 3. Results
output
FALSE

MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person60"})
RETURN apoc.nodes.connected(p1, p2, "FOLLOWS>|KNOWS") AS output;

Table 4. Results
output
TRUE

MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person30"})
RETURN apoc.nodes.connected(p1, p2, "FOLLOWS>") AS output;

Table 5. Results
output
TRUE

More documentation of apoc.nodes.connected