LOOP AT tbl ASSIGNING <line> CASTING
2014-12-01
Did you know that you can do a LOOP on an internal table of one type into a structure of a different type?
Consider the following types:
TYPES: BEGIN OF ty_s_linha1,
kunnr TYPE kunnr,
name1 TYPE name1,
END OF ty_s_linha1,
BEGIN of ty_s_linha2,
kunnr TYPE kunnr,
END OF ty_s_linha2.
You have an internal table of type LINHA1 and want to loop it into a structure of type LINHA2.
The old way of doing it required you to manually convert LINHA1 into LINHA2:
DATA: t_linha1 TYPE STANDARD TABLE OF ty_s_linha1,
s_linha2 TYPE ty_s_linha2.
FIELD-SYMBOLS: <s_linha1> TYPE ty_s_linha2.
LOOP AT t_linha1 ASSIGNING <s_linha1>.
MOVE-CORRESPONDING <s_linha1> TO s_linha2.
do_something( s_linha2 ).
ENDLOOP.But a simple word, CASTING, makes everything so much simpler:
DATA: t_linha1 TYPE STANDARD TABLE OF ty_s_linha1.
FIELD-SYMBOLS: <s_linha2> TYPE ty_s_linha2.
LOOP AT t_linha1 ASSIGNING <s_linha2> CASTING.
faz_algo( s_linha2 ).
ENDLOOP.Note that this doesn’t work with INTO, only with ASSIGNING.
Thank you Nuno Morais for the tip.
Thank you Eelco for the photo.