Совпадение строк одной внутренней таблицы в другой.

TYPES: BEGIN OF filter,
         cityfrom TYPE spfli-cityfrom,
         cityto   TYPE spfli-cityto,
       END OF filter,
       filter_tab TYPE HASHED TABLE OF filter
                  WITH UNIQUE KEY cityfrom cityto.

DATA(filter_tab) = …        

DATA(extract) =
  FILTER #( spfli_tab IN filter_tab
              WHERE cityfrom = cityfrom  AND cityto = cityto ).

TYPES: BEGIN OF filter,

cityfrom TYPE spfli-cityfrom,

cityto TYPE spfli-cityto,

END OF filter,

filter_tab TYPE HASHED TABLE OF filter

WITH UNIQUE KEY cityfrom cityto.

DATA(filter_tab) = …

DATA(extract) =

FILTER #( spfli_tab IN filter_tab

WHERE cityfrom = cityfrom AND cityto = cityto ).