apoc.create.vNode

Function APOC Core

apoc.create.vNode(['Label'], {key:value,…}) returns a virtual node

Signature

apoc.create.vNode(label :: LIST? OF STRING?, props = {} :: MAP?) :: (NODE?)

Input parameters

Name	Type	Default
label	LIST? OF STRING?	null
props	MAP?	{}

Name

Type

Default

label

LIST? OF STRING?

null

props

MAP?

{}

Usage Examples

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

CREATE (s:Student {name: 'Alice', score: 71});
CREATE (s:Student {name: 'Mark', score: 95});
CREATE (s:Student {name: 'Andrea', score: 86});
CREATE (s:Student {name: 'Rajesh', score: 89});
CREATE (s:Student {name: 'Jennifer', score: 96});
CREATE (s:Student {name: 'Katarina', score: 80});

The apoc.create.vNode offers both a procedure and function version, so that we can create the virtual nodes independently or return them based on results of a query.

For instance, we might want to create virtual nodes for just the scores, so that researchers could retrieve the score, but not student data:

apoc.create.vNode Procedure

MATCH (s:Student)
CALL apoc.create.vNode(['Score'],{value: s.score}) YIELD node
RETURN node;

Table 1. Results
node
{"value":71}
{"value":95}
{"value":86}
{"value":89}
{"value":96}
{"value":80}

We could also create a virtual graph adhoc that separates students from their scores. This allows testing or querying the data in an alternate data model than what physically exists in the database.

apoc.create.vNode Function

MATCH (s:Student)
RETURN apoc.create.vNode(['Student'],{name: s.name}) as student,
       apoc.create.vNode(['Score'],{value: s.score}) as score;

Table 2. Results
student	score
{"name":"Alice"}	{"value":71}
{"name":"Mark"}	{"value":95}
{"name":"Andrea"}	{"value":86}
{"name":"Rajesh"}	{"value":89}
{"name":"Jennifer"}	{"value":96}
{"name":"Katarina"}	{"value":80}