ABAP_SYNTAX ABAP_KEY ... ${ ASSIGNING <(><)> $[CASTING$] $[ELSE UNASSIGN$] $} $| ${ REFERENCE INTO dref $}.
What does it do? These additions are possible only when modifying single lines. If modified successfully, the addition ASSIGNING is used to assign the line to a field symbol and the addition REFERENCE INTO is used to set a reference to the modified line in a reference variable. The syntax and meaning are the same as when specifying the output behavior in the statement READ TABLE and the same restrictions apply regarding the modification of key fields for primary and secondary table keys. In particular, inline declarations using the declaration operators DATA, FINAL and FIELD-SYMBOL are possible. The addition ELSE UNASSIGN sets the state of the field symbol behind ASSIGNING to unassigned if the modification was not successful and sy-subrc is set to 4. Otherwise, the field symbol keeps its previous state.
ABAP_EXAMPLE_VX5 Conversion of smoking seats to non-smoking seats in an internal table of flight bookings. After the loop, each line in the reference table reftab references a line in itab in which a change took place. ABEXA 00431 ABAP_EXAMPLE_END
