apoc.refactor.collapseNode

Details
Syntax	`apoc.refactor.collapseNode(nodes, relType) :: (input, output, error)`
Description	Collapses the given `NODE` and replaces it with a `RELATIONSHIP` of the given type.
Input arguments	Name	Type	Description
	`nodes`	`ANY`	The nodes to collapse. Nodes can be of type `STRING` (elementId()), `INTEGER` (id()), `NODE`, or `LIST<STRING \| INTEGER \| NODE>`.
	`relType`	`STRING`	The name of the resulting relationship type.
Return arguments	Name	Type	Description
	`input`	`INTEGER`	The id of the given relationship.
	`output`	`RELATIONSHIP`	The id of the new relationship with the updated type.
	`error`	`STRING`	The message if an error occurred.

Usage Examples

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

CREATE (flight:Flight {number: "BA001"})
CREATE (origin:Airport {code: "LHR"})
CREATE (destination:Airport {code: "AMS"})
CREATE (flight)<-[:OUT]-(origin)
CREATE (flight)-[:IN]->(destination);

The following query collapses the Flight node, replacing it with a CONNECTED to relationship:

MATCH (flight:Flight {number: "BA001"})
CALL apoc.refactor.collapseNode([flight],'CONNECTED_TO')
YIELD input, output
RETURN input, output;

Results
input	output
10	[:CONNECTED_TO {number: "BA001"}]

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