rohankumardubey / finding_triplets

Finding Triplets

Finding triplets using Neo4j

As requested by this Stack Overflow question: https://stackoverflow.com/questions/45541495/finding-triplets-having-highest-common-relationships-in-neo4j

This project requires Neo4j 3.2.x

Instructions

This project uses maven, to build a jar-file with the procedure in this project, simply package the project with maven:

mvn clean package

This will produce a jar-file, target/triplets-1.0-SNAPSHOT.jar, that can be copied to the plugin directory of your Neo4j instance.

cp target/triplets-1.0-SNAPSHOT.jar neo4j-enterprise-3.2.3/plugins/.

Edit your Neo4j/conf/neo4j.conf file by adding this line:

dbms.security.procedures.unrestricted=com.maxdemarzi.*    

Restart your Neo4j Server.

Create the Schema by running this stored procedure:

CALL com.maxdemarzi.schema.generate

Create some test data:

CREATE (t1:Tag {name:'first tag'})
CREATE (t2:Tag {name:'second tag'})
CREATE (t3:Tag {name:'third tag'})
CREATE (t4:Tag {name:'fourth tag'})       
CREATE (plan1:TestPlan)
CREATE (plan2:TestPlan)
CREATE (plan3:TestPlan)
CREATE (plan4:TestPlan)
CREATE (plan5:TestPlan)
CREATE (plan6:TestPlan)       
CREATE (plan1)-[:TAGGED]->(t1)
CREATE (plan1)-[:TAGGED]->(t2)
CREATE (plan2)-[:TAGGED]->(t1)
CREATE (plan2)-[:TAGGED]->(t2)
CREATE (plan3)-[:TAGGED]->(t1)
CREATE (plan3)-[:TAGGED]->(t2)
CREATE (plan3)-[:TAGGED]->(t3)
CREATE (plan4)-[:TAGGED]->(t1)
CREATE (plan4)-[:TAGGED]->(t2)
CREATE (plan4)-[:TAGGED]->(t3)
CREATE (plan4)-[:TAGGED]->(t4)
CREATE (plan5)-[:TAGGED]->(t1)
CREATE (plan5)-[:TAGGED]->(t2)
CREATE (plan5)-[:TAGGED]->(t3)
CREATE (plan5)-[:TAGGED]->(t4)
CREATE (plan6)-[:TAGGED]->(t1)
CREATE (plan6)-[:TAGGED]->(t2)
CREATE (plan6)-[:TAGGED]->(t3)
CREATE (plan6)-[:TAGGED]->(t4)

Call the procedure:

CALL com.maxdemarzi.combinations(tag, number, limit)
CALL com.maxdemarzi.combinations('first tag', 3, 10);    

You should get:

{
  "tag1": "second tag",
  "count": 4,
  "tag2": "third tag"
}
{
  "tag1": "third tag",
  "count": 3,
  "tag2": "fourth tag"
}
{
  "tag1": "second tag",
  "count": 3,
  "tag2": "fourth tag"
}

Try a larger number:

CALL com.maxdemarzi.combinations('first tag', 4, 10);