code: protected long parseBracketedLong( DdlTokenStream tokens,
                                         DataType dataType ) {
          consume(tokens, dataType, false, L_PAREN);
          String value = consume(tokens, dataType, false);
          consume(tokens, dataType, false, R_PAREN);
          return parseLong(value);
      }
docs: Returns a long value from the input token stream assuming the long is bracketed with parenthesis.
  
  @param tokens
  @param dataType
  @return the long value