apoc.nodes.connected
Function APOC Core
apoc.nodes.connected(start, end, rel-direction-pattern) - returns true when the node is connected to the other node, optimized for dense nodes
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;
friends | follows |
---|---|
101 |
51 |
MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person60"})
RETURN apoc.nodes.connected(p1, p2) AS output;
output |
---|
TRUE |
MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person60"})
RETURN apoc.nodes.connected(p1, p2, "FOLLOWS") AS output;
output |
---|
FALSE |
MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person60"})
RETURN apoc.nodes.connected(p1, p2, "FOLLOWS>|KNOWS") AS output;
output |
---|
TRUE |
MATCH (p1:Person {name: "Michael"})
MATCH (p2:Person {name: "Person30"})
RETURN apoc.nodes.connected(p1, p2, "FOLLOWS>") AS output;
output |
---|
TRUE |