Unpredictable behavior u201CFOR ALL ENTRIES INu201D for table AFRU

Question

In AFRU table there are  8 Rows
AUFPL     APLZL     ISMNW     BUDAT                  STZHL
1647     1     95     27.02.2009     0
1647     1     95     27.02.2009     1
1647     1     95     27.02.2009     0
1647     1     95     27.02.2009     3
1647     1     95     27.02.2009     0
1647     1     95     27.02.2009     5
1647     1     95     27.02.2009     0
1647     1     155     12.03.2009     0
Using below Statement I am able to fetch only 5 rows. Select for all entries statement is not picking
Up other 3 rows.
SELECT aufpl aplzl ismnw budat stzhl FROM afru
      INTO TABLE gt_afru
      FOR ALL ENTRIES IN gt_afvc
      WHERE aufpl = gt_afvc-aufpl
       And aplzl = gt_afvc-aplzl.
Five Rows Selected
AUFPL     APLZL     ISMNW     BUDAT                STZHL
1647     1     95     27.02.2009     0
1647     1     95     27.02.2009     1
1647     1     95     27.02.2009     3
1647     1     95     27.02.2009     5
1647     1     155     12.03.2009     0
When I comment u201CFor all Entriesu201D and use statement like below, it s picking up all the 8 rows.
    SELECT aufpl aplzl ismnw budat stzhl FROM afru
         INTO TABLE gt_afru
         WHERE aufpl = '0000001647'
           AND aplzl = '00000001'.
Please Help me understand why it s behaving like this. What is the technicality behind?

Answer 1

SELECT ... FOR ALL ENTRIES IN <itab> or  WHERE <cond>  ...
If you specify a field of the internal table <itab> as an operand in a condition, you address all lines of the internal table. The comparison is then performed for each line of the internal table. For each line, the system selects the lines from the database table that satisfy the condition. The result set of the SELECT statement is the union of the individual selections for each line of the internal table. Duplicate lines are automatically eliminated from the result set. If <itab> is empty, the addition FOR ALL ENTRIES is disregarded, and all entries are read.
the bold italic part of the above post is the reason for having 5 rows instead of 8 rows.When "For all entries "  statement encountered the union selection occurred.And that is why you get only 5 rows.For further help on "For all entries" go through this documentation.[For all Entries|http://help.sap.com/abapdocu/en/ABENWHERE_LOGEXP_ITAB.htm]
Thanking you,
Pulak
Edited by: Pulak  Mandal on Mar 16, 2009 3:29 PM