Function resolve_virtual_relation 

pub fn resolve_virtual_relation(
    search_path: &[String],
    name: &str,
) -> Option<VirtualRelation>

Resolve a relation reference to one of the engine’s virtual catalog relations. information_schema and pg_catalog names resolve qualified or bare because PostgreSQL always searches pg_catalog; the AGE relations resolve bare only while ag_catalog is on the session search_path, exactly like the extension’s schema.