Oracle compatibility: The REVERSE key word for FOR loop behaves incorrectly

Release tested: 10.3.9

The following loop did not produce any output. It worked correctly without the REVERSE key word.

SET SQL_MODE=ORACLE;

  delimiter //

  #

  DECLARE

     totalprice DECIMAL(12,2):=NULL;

     loop_start INTEGER := 1;

  BEGIN

     FOR idx IN REVERSE loop_start..10 LOOP

        SELECT idx;

     END LOOP;

  END;

  //

With the REVERSE key word, switching the lower and upper bound values also worked:

FOR idx IN REVERSE 10..loop_start LOOP

However, this behavior is different from Oracle's documentation below.

---------
If REVERSE is specified:

If upper_bound is less than lower_bound, the statements do not run, and control transfers to the statement after the FOR LOOP statement.
---------