Neo4j support

Neo4j has a JDBC driver so should be possible to add.

Use-Cases:

• Graph Model Evolution, e.g. evolve a relationship to a node
• Version Update, e.g. replace type properties with Labels
• Cleanup, e.g. remove unused properties
• Introduce Graph Structures, e.g. introduce time-tree for events

Steps: [ ] Add Support for Neo4j Driver (easy) [ ] Add Tests for Driver Selection [ ] Make “schema_version” operations overridable (create, read, update), currently all tied to SQL (In MetaDataTableImpl) [ ] Neo4j has no notion of “schema” so, perhaps add a means to work with the “default” schema [ ] Add Tests for the above

I’m happy to look into adding this support, but as it also requires some changes to the core, I’d love to have a discussion first.

[axelfontaine]

@jexp We’ll consider this for 5.1 (5.0 feature scope is already fixed)

[jexp]

@axelfontaine if there is any way we can help please let us know 😃