REPORT ZNGAP.

TYPES:

  BEGIN OF struc,

     col1 TYPE c LENGTH 2,

     col2 TYPE i,

     col3 TYPE i,

  END OF struc.

DATA itab TYPE SORTED TABLE OF struc WITH UNIQUE KEY col1

         WITH UNIQUE SORTED KEY sec_key COMPONENTS col2.

itab = VALUE #( ( col1 = 'AA' col2 = 5 col3 = 100 )

               ( col1 = 'BB' col2 = 4 col3 = 100 )

               ( col1 = 'CC' col2 = 3 col3 = 100 )

               ( col1 = 'DD' col2 = 2 col3 = 100 )

               ( col1 = 'EE' col2 = 1 col3 = 100 ) ).

DATA(wa) = itab[ 1 ].

ASSIGN itab[ col1 = 'BB' ] TO FIELD-SYMBOL().

cl_demo_output=>display( itab[ 3 ] ).

IF line_exists( itab[ KEY sec_key col2 = 2 ] ).

ENDIF.

DATA(line) = itab[ KEY sec_key col2 = 4 ].

TRY.

DATA(not) = itab[ KEY sec_key col2 = 333 ].

CATCH cx_root.

ENDTRY.

itab[ col1 = 'EE' ]-col3 = 555.