Advanced algorithms
Available algorithms
set_property

set_property

**Set property ** is a collection of Memgraph's dynamical access and edit of node and relationship properties. The procedures included in it involve copying properties from one entity to another.

Source code
TraitValue
Module typemodule
ImplementationC++
Graph directiondirected/undirected
Edge weightsunweighted/weighted
Parallelismsequential

Procedures

You can execute this algorithm on graph projections, subgraphs or portions of the graph.

copyPropertyNode2Node()

Copies properties from one node to another.

Input:

  • sourceNode: Vertex ➡ The node you want to copy property from.
  • sourceProperties: List[string] ➡ List of properties you want to copy from.
  • targetNode: Vertex ➡ The node you want to copy property to.
  • targetProperties: List[string] ➡ List of properties you want to copy to.

Output:

  • result: boolean ➡ yields true if the operation was successful, false otherwise

Usage: 

MATCH (from {id:1}), MATCH (to {id: 2})
CALL set_property.copyPropertyNode2Node(from, ["prop"], to, ["prop"]) YIELD result
RETURN result;

copyPropertyNode2Rel()

Copies properties from one node to another relationship.

Input:

  • sourceNode: Vertex ➡ The node you want to copy property from.
  • sourceProperties: List[string] ➡ List of properties you want to copy from.
  • targetRel: Relationship ➡ The relationship you want to copy property to.
  • targetProperties: List[string] ➡ List of properties you want to copy to.

Output:

  • result: boolean ➡ yields true if the operation was successful, false otherwise

Usage: 

MATCH (from {id:1})-[to:TYPE]->({id: 2})
CALL set_property.copyPropertyNode2Rel(from, ["prop"], to, ["prop"]) YIELD result
RETURN result;

copyPropertyRel2Node()

Copies properties from one relationship to another node.

Input:

  • sourceRel: Relationship ➡ The relationship you want to copy property from.
  • sourceProperties: List[string] ➡ List of properties you want to copy from.
  • targetNode: Vertex ➡ The node you want to copy property to.
  • targetProperties: List[string] ➡ List of properties you want to copy to.

Output:

  • result: boolean ➡ yields true if the operation was successful, false otherwise

Usage: 

MATCH (to {id:1})-[from:TYPE]->({id: 2})
CALL set_property.copyPropertyRel2Node(from, ["prop"], to, ["prop"]) YIELD result
RETURN result;

copyPropertyRel2Rel()

Copies properties from one relationship to another.

Input:

  • sourceRel: Vertex ➡ The relationship you want to copy property from.
  • sourceProperties: List[string] ➡ List of properties you want to copy from.
  • targetRel: Vertex ➡ The relationship you want to copy property to.
  • targetProperties: List[string] ➡ List of properties you want to copy to.

Output:

  • result: boolean ➡ yields true if the operation was successful, false otherwise

Usage: 

MATCH ({id:1})-[from:TYPE]->(to {id: 2}), ({id:3})-[to:TYPE]->(to {id: 4})
CALL set_property.copyPropertyRel2Rel(from, ["prop"], to, ["prop"]) YIELD result
RETURN result;