Feature request: or |operator in node labels

[Benja1972]

It would be nice to have ability to query nodes with pre-selected labels by | or operator.

MATCH (A:person) -[:knows]-> (B:person|animal)

We can see that it is already implemented in relations. Probably it would be easy to make it work for nodes also

[j6k4m8]

Nice! Adding this to the task list for sure.

Here's an implementation plan for whomever picks this up:

• Add tests, using the edge | tests as a model, which should fail now
• change TYPE to type_list

  grand-cypher/grandcypher/__init__.py

  Line 118 in fff7651

  | "(" (CNAME)? ":" TYPE (json_dict)? ")"

• support type_list of list[str] here

  grand-cypher/grandcypher/__init__.py

  Line 1102 in fff7651

  node_type = set([node_type]) if node_type else set()

  ... using the edge match logic as a model
• handle the provided types in the _is_node_attr_match function, using this part of _is_edge_attr_match as a model

  grand-cypher/grandcypher/__init__.py

  Line 203 in fff7651

  if val and val - host_node.get("__labels__", set()):

• Confirm that the tests pass!