FIELD-SYMBOLS: ABAP Keyword a day

FIELD-SYMBOLS: <fs>.
FIELD-SYMBOLS: <fs> TYPE t.
FIELD-SYMBOLS: <fs> TYPE LINE OF t.
FIELD-SYMBOLS: <fs> LIKE s.
FIELD-SYMBOLS: <fs> LIKE LINE OF s.

Field Symbols are placeholders or symbolic names for the fields. Pointed brackets ‘<>‘ are part of the the syntax. the type or like addition allows you to specify the type of field symbols.

Fields symbols are commonly used while working with LOOP…MODIFY…ENDLOOP eliminating complex modifications on the internal table. In the below example directly works on the internal table line and eliminates MODIFY altogether.

field-symbols: <fs> like line of <itab>.
loop at <itab> assigning <fs>.
read table <itab_2> with key <field> = <fs>-field1.
if sy-subrc eq 0.
<fs>-field2 = <itab_2>-field2..
endif.
endloop.

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