Redirect relationships

The available procedures are described in the table below:

call apoc.refactor.to(rel, endNode)

redirect relationship to use new end-node

call apoc.refactor.from(rel, startNode)

redirect relationship to use new start-node

Example Usage

The examples below will help us learn how to use these procedures.

The following creates Foo and Bar nodes that are connected by a FOOBAR relationship, as well as a solitary Antony node:

CREATE (f:Foo {value: "Foo"})-[rel:FOOBAR {a:1}]->(b:Bar {value: "Bar"})
CREATE (p:Person {name:'Antony'})
RETURN *

The following will change the target node of the FOOBAR relationship from the Bar node to the Antony node:

MATCH (f:Foo)-[rel:FOOBAR {a:1}]->(b:Bar)
MATCH (p:Person {name:'Antony'})
CALL apoc.refactor.to(rel, p)
YIELD input, output
RETURN input, output

If we execute this query, it will result in the following graph:

The following creates Foo2 and Bar2 nodes that are connected by a FOOBAR2 relationship, as well as a solitary David node:

CREATE (f:Foo2 {value: "Foo2"})-[rel:FOOBAR2 {a:1}]->(b:Bar2 {value: "Bar2"})
CREATE (p:Person {name:'David'})
RETURN *

The following will change the source node of the FOOBAR2 relationship from the Foo node to the David node:

MATCH (f:Foo2)-[rel:FOOBAR2 {a:1}]->(b:Bar2)
MATCH (p:Person {name:'David'})
CALL apoc.refactor.from(rel, p)
YIELD input, output
RETURN input, output

If we execute this query, it will result in the following graph: