Can anyone give me an example of for all entries in case of inner join

Question

Hi abapers,
I am trying to replace an inner join with for all entries.
So kindly give me a demo code so that i can understand the use and apply it.
And plz tell me in which case it is better to use for all entries and in which case to use inner join so that better performance will occur.
With Regards
Ansuman

Answer 1

Hello Ansuman,
For example:
DATA:
  BEGIN OF fs_eket,
    ebeln LIKE ekko-ebeln,             " Purchasing Document Number
    ebelp LIKE ekpo-ebelp,             " Item Number of Purchasing Doc
  END OF fs_eket.                      " fs_eket
DATA:
  t_eket LIKE                          " Purchase table
STANDARD TABLE
      OF fs_eket.
Using joins:
select ebeln ebelp
into corresponding fields of table t_eket
from ekko join ekpo
on ekkoebeln eq ekpoebeln
where ebeln in s_sbeln.
The select statement can be replaced by
SELECT ebeln
  FROM ekko
  INTO CORRESPONDING FIELDS OF TABLE t_eket
WHERE ebeln IN s_ebeln.
IF sy-subrc EQ 0.
  sort t_eket by ebeln.
  SELECT ebeln
         ebelp
    FROM ekpo
    INTO CORRESPONDING FIELDS OF TABLE t_eket
     FOR ALL ENTRIES IN t_eket
   WHERE ebeln EQ t_eket-ebeln.
The duplicate entries are removed by using FOR ALL ENTRIES. Or else by using the join, you have teh sort the table by key fields and then delete adjacent duplicates.
Hope it helps you
Regards
Indu