text: CREATE TABLE IF NOT EXISTS contentnode_identifiables (
    contentnode_uuid UUID NOT NULL,
    identifiable_uuid UUID NOT NULL UNIQUE,
    sortIndex SMALLINT,
  
    PRIMARY KEY (contentnode_uuid, identifiable_uuid),
    FOREIGN KEY (contentnode_uuid) REFERENCES contentnodes(uuid),
    FOREIGN KEY (identifiable_uuid) REFERENCES identifiables(uuid)
  );
  