Neo4j

Anni · ‎12-16-2019

Hello,

I would like to create a meta graph of my graph database to work with this meta model. The APOC procedure 'CALL apoc.meta.graph()' only creates a virtual graph so that you can't query it with cypher (it's only for visualization). Since I would like to run queries on the meta graph I search for a method to create the meta graph. I found this blog post

but I ask myself if there exists any new function meanwhile.

Besides, I would like to compare the meta graph to another meta graph meaning that I want to know the differences between the meta structures. Is there any procedure that helps to compare two graphs automatically?

Thanks a lot for your help!

szenyo · ‎12-16-2019

Hi,
it is a challenging task to compare two graphs.
It is not exactly the same use case, but when I used graph comparison in my java tests, I used GraphAware's resttest plugin, where you can validate that the graph DB is the same as you expect. It is useful in simple test cases. And you have to know the shape of one graph and you can assert it to the DB.

If you are about to code it in java, then it can be useful:

github.com

graphaware/neo4j-framework/blob/21d54d9a71ba930da5c9886a8df36d99527b65b7/tests/src/main/java/com/gra...

/*
 * Copyright (c) 2013-2019 GraphAware
 *
 * This file is part of the GraphAware Framework.
 *
 * GraphAware Framework is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of
 * the GNU General Public License along with this program.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

package com.graphaware.test.unit;

import com.graphaware.common.policy.inclusion.InclusionPolicies;
import com.graphaware.common.policy.inclusion.PropertyInclusionPolicy;

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Another solution may fit better into your use case is to use cypher (and APOC), and hash your stuff with md5.

APOC provides some node comparison and fingerprinting as well:
https://neo4j.com/docs/labs/apoc/current/comparing-graphs/

I hope it helps, maybe you have to combine these solutions.

Neo4j

How to create a meta graph (not only for visualization!) and compare it to another meta graph automatically