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neo4j create schema based on existing nodes
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| // Generate an overview / schema of a graph database | |
| // Creates a node for each node label found in the graph, | |
| // relating these to each other for each type of relationship found in the graph | |
| // (apoc call required to create rel with dynamic type) | |
| MATCH (a)-[r]->(b) | |
| WITH head(labels(a)) AS l, head(labels(b)) AS l2, type(r) AS rel_type, count(*) as num_links | |
| merge (aMeta:Meta {label: l}) | |
| merge (bMeta:Meta {label: l2}) | |
| with aMeta, bMeta, rel_type, num_links | |
| call apoc.create.relationship(aMeta, rel_type, {num_links: num_links}, bMeta) yield rel | |
| with aMeta, bMeta | |
| return aMeta, bMeta |
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