* Determines if an inner join returns the same number of results as an outer join.

REPORT z_join_type_checker.

DATA:
  v_count_1 TYPE i,
  v_count_2 TYPE i,
  v_diff    TYPE i.


SELECT COUNT(*)
  INTO v_count_1
  FROM msku
  JOIN makt
    ON msku~matnr = makt~matnr.

SELECT COUNT(*)
  INTO v_count_2
  FROM msku
  LEFT OUTER JOIN makt
    ON msku~matnr = makt~matnr.

v_diff = v_count_2 - v_count_1.

WRITE: / v_count_2,
         'vs',
         v_count_1,
         '=',
         v_diff.