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removeRelationProperty

Remove properties from relationships in Neo4j database

Syntax

removeRelationProperty(neo4jconn,relation,propertyNames)
relationinfo = removeRelationProperty(neo4jconn,relation,propertyNames)

Description

example

removeRelationProperty(neo4jconn,relation,propertyNames) removes properties from one or more relationships in a Neo4j® database using a Neo4j database connection.

example

relationinfo = removeRelationProperty(neo4jconn,relation,propertyNames) returns updated relationship information as a Neo4jRelation object for one relationship or as a table for multiple relationships.

Examples

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Remove one property from a single relationship in a Neo4j® database and access the relationship.

Create a Neo4j database connection using the URL http://localhost:7474/db/data, user name neo4j, and password matlab.

url = 'http://localhost:7474/db/data';
username = 'neo4j';
password = 'matlab';
neo4jconn = neo4j(url,username,password);

Check the Message property of the Neo4j connection object neo4jconn. The blank Message property indicates a successful connection.

neo4jconn.Message
ans =

     []

Retrieve the second node in the table of node information. This node has the label Person.

nlabel = "Person";
nodeinfo = searchNode(neo4jconn,nlabel);
node = nodeinfo.NodeObject(2);

Find the outgoing relationship from the origin node.

direction = "out";
relinfo = searchRelation(neo4jconn,node,direction);
relation = relinfo.Relations.RelationObject;

Set the StartDate property for a single relationship in the database using the Neo4j database connection.

properties.StartDate = "01/01/2018";
setRelationProperty(neo4jconn,relation,properties)

Display the relationship information for the updated relationship.

relinfo = searchRelation(neo4jconn,node,direction);
relinfo.Relations.RelationData{1}
ans = struct with fields:
    StartDate: '01/01/2018'

Remove the relationship property.

propertyNames = "StartDate";
removeRelationProperty(neo4jconn,relation,propertyNames)

Display the relationship information for the updated relationship.

relinfo = searchRelation(neo4jconn,node,direction);
relinfo.Relations.RelationData{1}
ans = struct with no fields.


Close the database connection.

close(neo4jconn)

Remove relationship properties from multiple relationships in a Neo4j® database. Access the updated relationship information using an output argument.

Create a Neo4j database connection using the URL http://localhost:7474/db/data, user name neo4j, and password matlab.

url = 'http://localhost:7474/db/data';
username = 'neo4j';
password = 'matlab';
neo4jconn = neo4j(url,username,password);

Check the Message property of the Neo4j connection object neo4jconn. The blank Message property indicates a successful connection.

neo4jconn.Message
ans =

     []

Find the origin node with the node identifier 3 and retrieve its node information.

nodeid = 3;
nodeinfo = searchNodeByID(neo4jconn,nodeid);

Find the outgoing relationships from the origin node.

direction = "out";
relinfo = searchRelation(neo4jconn,nodeinfo,direction);
relation = relinfo.Relations.RelationObject;

Set the StartDate and EndDate properties for the outgoing relationships using the Neo4j database connection.

properties.StartDate = "01/01/2018";
properties.EndDate = "12/31/2018";
relationinfo = setRelationProperty(neo4jconn,relation,properties);

Display the relationship information for the two updated relationships.

relationinfo.RelationData{1:2}
ans = struct with fields:
    StartDate: '01/01/2018'
      EndDate: '12/31/2018'

ans = struct with fields:
    StartDate: '01/01/2018'
      EndDate: '12/31/2018'

Remove the relationship properties using the property names. The relationinfo output argument is a Neo4jRelation object.

propertyNames = ["StartDate" "EndDate"];
relationinfo = removeRelationProperty(neo4jconn,relation,propertyNames);

Display the relationship information for the two updated relationships.

relationinfo.RelationData{1:2}
ans = struct with no fields.


ans = struct with no fields.


Close the database connection.

close(neo4jconn)

Input Arguments

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Neo4j database connection, specified as a Neo4jConnect object created with the function neo4j.

Relationship in a Neo4j database, specified as a Neo4jRelation object, Neo4jRelation object array, numeric scalar, or numeric vector. For a single relationship, use a Neo4jRelation object or a numeric scalar that contains the relationship identifier. For multiple relationships, use a Neo4jRelation object array or a numeric vector that contains an array of relationship identifiers.

Example: 15

Example: [15,16,17]

Property names, specified as a character vector, cell array of character vectors, string scalar, or string array. For one property, use a character vector or string scalar. For multiple properties, use a cell array of character vectors or a string array.

Example: "Analyst"

Example: ["Analyst" "Clerk"]

Data Types: char | string

Output Arguments

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Relationship information, returned as a Neo4jRelation object for one relationship or as a table for multiple relationships.

For multiple relationships, the table contains these variables:

  • StartNodeID — Node identifier of the start node for each matched relationship

  • RelationType — Character vector that denotes the relationship type for each matched relationship

  • EndNodeID — Node identifier of the end node for each matched relationship

  • RelationData — Structure array that contains property keys associated with each matched relationship

  • RelationObjectNeo4jRelation object for each matched relationship

The row names in the table are Neo4j relationship identifiers.

Introduced in R2019a