Variante 1
SELECT matnr, CASE meins WHEN 'ST' THEN 'Stück' WHEN 'KG' THEN 'Kg' ELSE 'andere Einheit' END AS meins_desc, maktx INTO TABLE @DATA(it_mara) FROM marav. cl_demo_output=>display( it_mara ).
Variante 2
SELECT matnr, CASE WHEN meins = 'ST' THEN 'Stück' WHEN meins = 'KG' THEN 'Kg' ELSE 'andere Einheit' END AS meins_desc, maktx INTO TABLE @DATA(it_mara) FROM marav. cl_demo_output=>display( it_mara ).