Is there an efficient way to know all node/edge labels?

[marco-brandizi]

Hi all,

I'd like to fetch all the unique node labels that are used in a DB. Similarly, I'd like to know all the edge labels (long story, I want to write a script to index a given property for all the types, eg, CREATE INDEX ON $type ( uri ) for each type; obviously, I'm assuming all the type instances have such a property).

I know how to do that in gremlin:

g.V().label().dedup ()
g.E().label().dedup ()

But likely, this will scan all the nodes/labels and will be very slow in large databases. Or not? Is there a way that queries schema information? Similarly, are there SQL commands to query the schema, eg, SHOW ALL TABLES, DESCRIBE TABLE, etc?

[lvca]

You can execute:

select from schema:types

To have all the defined types.

[marco-brandizi]

Ah, now I see schema:* in the manual, thank you very much!