searchRelationByID
Search Neo4j relationship by relationship identifier
Description
returns the Neo4j® relationship specified by the relationship identifier using the
Neo4j database connection.relationinfo
= searchRelationByID(neo4jconn
,relationid
)
Examples
Search for Relationships
Search for a single relationship or multiple relationships by using relationship identifiers in the Neo4j® database.
Assume that you have graph data stored in a Neo4j database that represents a social neighborhood. This database has seven nodes and eight relationships. Each node has only one unique property key name
with a value ranging from User1
through User7
. Each relationship has the type knows
.
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 = []
Search for the relationship with the identifier 8
by using the Neo4j database connection.
relationid = 8; relationinfo = searchRelationByID(neo4jconn,relationid)
relationinfo = Neo4jRelation with properties: RelationID: 8 RelationData: [1×1 struct] StartNodeID: 5 RelationType: 'knows' EndNodeID: 9
relationinfo
is a Neo4jRelation
object with these properties:
Relationship identifier
Relationship data
Start node identifier
Relationship type
End node identifier
Display the relationship type.
relationinfo.RelationType
ans = 'knows'
Search for multiple relationships with the identifiers 4
, 5
, and 6
by using the Neo4j database connection.
relationid = [4,5,6]; relationinfo = searchRelationByID(neo4jconn,relationid)
relationinfo=3×5 table
StartNodeID RelationType EndNodeID RelationData RelationObject
___________ ____________ _________ ____________ _______________________________________
5 3 'knows' 4 [1×1 struct] [1x1 database.neo4j.http.Neo4jRelation]
4 3 'knows' 5 [1×1 struct] [1x1 database.neo4j.http.Neo4jRelation]
6 5 'knows' 4 [1×1 struct] [1x1 database.neo4j.http.Neo4jRelation]
relationinfo
is a table with these variables:
Start node identifier
Relationship type
End node identifier
Relationship data
Neo4jRelation
object
Close the database connection.
close(neo4jconn)
Input Arguments
neo4jconn
— Neo4j database connection
Neo4jConnect
object
Neo4j database connection, specified as a Neo4jConnect
object created with the function neo4j
.
relationid
— Relationship identifier
numeric scalar | numeric vector
Relationship identifier, specified as a numeric scalar for a single relationship or numeric vector for multiple relationships.
Example: [15,16]
Data Types: double
Output Arguments
relationinfo
— Relationship information
Neo4jRelation
object | table
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 relationshipRelationType
— Character vector that denotes the relationship type for each matched relationshipEndNodeID
— Node identifier of the end node for each matched relationshipRelationData
— Structure array that contains property keys associated with each matched relationshipRelationObject
—Neo4jRelation
object for each matched relationship
The row names in the table are Neo4j relationship identifiers.
Version History
Introduced in R2018a
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