topic Re: ABAP 7.4 syntax for If condition within loop. in Application Development and Automation Discussions

ABAP 7.4 syntax for If condition within loop.

former_member444368 — Wed, 03 Mar 2021 04:55:59 GMT

Hello Experts,

Please help me how i can write below type of Loop AT statement as per 7.4 syntax.

Loop at lt_items into data(ls_items) where matnr = hzd456 and erdat le sy-datum .

if ls_items-sequence = 1.

lv_found = 'X'.

exit.

else.

clear : ls_items.

Endif.

endloop.

lv_value = ls_items-value.

Re: ABAP 7.4 syntax for If condition within loop.

pfefferf — Wed, 03 Mar 2021 06:20:30 GMT

As you have a LE condition no usage of a table expression is possible. So an adapted loop is a good option from my point of view (consider to use e.g. a sorted table when you have a lot of data in the internal table):

LOOP AT lt_items REFERENCE INTO DATA(lr_item)
WHERE matnr = 'hzd456'
  AND erdat le sy-datum
  AND sequence = 1.
  
  lv_value = lr_item->value.
  EXIT.

ENDLOOP.

Of course you could write something like following, but I see not real advantage in that:

DATA(lt_filtered_items) = FILTER #( lt_items 
  WHERE matnr = 'hzd456' AND erdat le sy-datum AND sequence = 1 ).

TRY.
  lv_value = lt_filtered_items[ 1 ]-value.
CATCH cx_sy_itab_line_not_found.
  " exception handling
ENDTRY.

Re: ABAP 7.4 syntax for If condition within loop.

Sandra_Rossi — Wed, 03 Mar 2021 08:02:03 GMT

Why isn't it possible with LE / <= ? (there's only an issue with EXIT for which the only workaround I know is to use a THROW exception):

I didn't test it, something like that:

TRY.
  DATA(lv_value) = REDUCE #( 
      INIT v TYPE ... 
           exit TYPE i
      FOR ... WHERE ( ... erdat <= sy-datum ... )
      NEXT v    = ...
           exit = COND #( WHEN v IS NOT INITIAL THEN THROW lx_stop ) )
CATCH lx_stop.
  " Stop
ENDTRY.

of course that's a stupid code 😛

Re: ABAP 7.4 syntax for If condition within loop.

pfefferf — Wed, 03 Mar 2021 08:04:40 GMT

Sure, with a REDUCE expression it is possible - not really readable on a first glimpse, but it works.

I talked about table expressions.