public Parser cursorPhrase() {
        if (cursorPhraseParser == null) {
           FutureParser future = scoped("cursorPhrase");
           cursorPhraseParser = future;
           future.setParser(
               sequence(
                   token("CURSOR"),
                   choice(
                       identifier(),
                       literal()
                   )
               )
           );
        }

        return cursorPhraseParser;
    }