如何在neo4j中从起始节点获取所有可到达的节点（以及它们之间的所有关系？）

Question

I have 5 nodes,1,2,3,4,5
the relationship between 5 nodes as below,

1-->2
2-->3
1-->3
2-->4
3-->5
4-->5

online model http://console.neo4j.org/r/8h0c91
use below cypher query to get one level connection nodes

match (n:Person{name:"1"})-[r]-(m:Person) return n,m,r

result:

n                        r                          m
(20:Person {name:"1"})  []  (20:Person {name:"1"})
(20:Person {name:"1"})  [(20)-[21:Follow]->(22)]    (22:Person {name:"3"})
(20:Person {name:"1"})  [(20)-[20:Follow]->(21)]    (21:Person {name:"2"})

which only can get the relationship between 1-->2 and 1-->3,cannot get 2-->3.
use below cypher query y to get sencond level connection nodes.

match (n:Person{name:"1"})-[r:Follow*0..2]-(m:Person) return n,m,r

result:

n   m   r
(0:Person {name:"1"})   (0:Person {name:"1"})   []
(0:Person {name:"1"})   (1:Person {name:"2"})   [(0)-[0:Follow]->(1)]
(0:Person {name:"1"})   (2:Person {name:"3"})   [(0)-[0:Follow]->(1), (1)-[2:Follow]->(2)]
(0:Person {name:"1"})   (3:Person {name:"4"})   [(0)-[0:Follow]->(1), (1)-[3:Follow]->(3)]
(0:Person {name:"1"})   (2:Person {name:"3"})   [(0)-[1:Follow]->(2)]
(0:Person {name:"1"})   (1:Person {name:"2"})   [(0)-[1:Follow]->(2), (1)-[2:Follow]->(2)]
(0:Person {name:"1"})   (4:Person {name:"5"})   [(0)-[1:Follow]->(2), (2)-[4:Follow]->(4)]

i cannot get the relationship of 4-->5 and 2-->3.
my question is how to get all nodes and relationship between all neo4j nodes.

Answer 1

You could just exclude the name match and add the direction of the relationship and it will return all three.

MATCH (n:Person)-[r]->(m:Person) 
RETURN n,m,r

Answer 2

From your comments, you're looking for 'all reachable nodes from a starting node (and optionally all relationships between them)'

In this case, the path expander procedures in APOC Procedures should have what you want:

MATCH (n:Person{name:"1"})
CALL apoc.path.subgraphAll(n, {maxLevel:2}) YIELD nodes, relationships
RETURN nodes, relationships

Edited above to add an upper bound on the traversals.