Concatenating non-character fields

Question

Hi,
I have a nested structure which I am trying to convert into a flat structure so that I can output this to a flat file.
I am trying to concatenate all the fields within my nested structure into a text field but the concatenate command does not automatically convert numerics/quantities.
An extract of my code is as follows:-
loop at itab-rec2 into wa2.
      concatenate wa2-ntgew wa2-gewei wa2-volum
                  wa2-ean11 into text.
      tlines-line = text.
      append tlines.
      clear text.
endloop.
Can anyone advise me on how I can convert the numeric/qty fields into a character string so I can the concatenate all the fields into a string.
Thanks,
Ruby

Answer 1

Hi Ruby,
mybe this could help:
<pre>
data:
  lv_separator type c,
  lv_offset type syfdpos,
  lv_len    type sytleng,
  lv_chars  type tab512.
field-symbols:
  <any> type any.
lv_separator = abap_char_utilities=>horizontal_tab.
loop at itab.
  do.
    assign component sy-index of structure itab to <any>.
    if sy-subrc <> 0.
      exit."loop
    endif.
    describe field <any> output length lv_len.
    write <any> to lv_chars+lv_offset(lv_len).
    add lv_len to lv_offset.
if field separator is needed add these lines
    write lv_separator to lv_chars+lv_offset(1).   
    add 1 to lv_offset.
  enddo.
  transfer lv_chars to file.
  clear lv_chars.
endloop." at itab.
</pre>
This will write a formatted output file but it will use the output formatting options defined for the actual user/language/system. This will determine the representation of numeric and date fields and all other fields with output conversion. That means that in the file you will have what you see on a list or grogram screen, not what you see in debugger. Fields are separated by tabulator. As all fields always are output in the same length, you may omit this part.
Regards,
Clemens