apoc.create.vPattern
Procedure APOC Core Deprecated
apoc.create.vPattern({_labels:['LabelA'],key:value},'KNOWS',{key:value,…}, {_labels:['LabelB'],key:value}) returns a virtual pattern
Signature
apoc.create.vPattern(from :: MAP?, relType :: STRING?, props :: MAP?, to :: MAP?) :: (from :: NODE?, rel :: RELATIONSHIP?, to :: NODE?)Usage Examples
The examples in this section are based on the following graph:
CREATE (s1:Student:TA:Graduate {name: 'Priya', score: 87, grade: 'B'})
CREATE (s2:Student:Graduate {name: 'Joachim', score: 90, grade: 'A'})
CREATE (s3:Student:TA:Graduate {name: 'Dominic', score: 78, grade: 'C'})
CREATE (s4:Student:Undergraduate {name: 'Amir', score: 84, grade: 'B'})
CREATE (s5:Student:Undergraduate {name: 'Natasha', score: 76, grade: 'C'})
CREATE (s6:Student:Undergraduate {name: 'Elena', score: 92, grade: 'A'});The apoc.create.vPattern and apoc.create.vPatternFull are procedures that allow us to create a virtual graph - both nodes and relationships at once. Both procedures have the same functionality, but slightly different syntax for specifying the nodes and relationships to create.
As an example, all of our data is in the Student nodes, but we can separate some of the data into other nodes and relationships with the query below.
MATCH (s:Student)
CALL apoc.create.vPattern(
{_labels:['Student'],name:s.name},
'FINISHED_COURSE_WITH',
{score: s.score},
{_labels:['Grade'], letter: s.grade}
)
YIELD from, rel, to
RETURN from, rel, to;
Note that the statement above does a CREATE (not MERGE), so it creates multiple nodes with the same grade letters.
Let’s do the same thing with the apoc.create.vPatternFull procedure to see the syntax differences and that the result is the same.
MATCH (s:Student)
CALL apoc.create.vPatternFull(
['Student'],
{name: s.name},
'FINISHED_COURSE_WITH',
{score: s.score},
['Grade'],
{letter: s.grade}
)
YIELD from, rel, to
RETURN from, rel, to;