ABAP - Logic for finding out the active employee

Question

Hi,
I am trying to write the program where i need to set the flag "YES" to active employee for the particular time period for the particular position.
For example:
Row     Employee     DateTo     DateFrom          Position     FLAG
1     1     1.1.2009     31.1.2009          10     YES
2     1     1.2.2009     1.3.2009          10     NO
3     1     2.3.2009     31.3.2009          10     YES
4     1     1.4.2009     31.12.2009                           11     YES
5     2     1.1.2009     31.1.2009          12     YES          
6     2     1.2.2009     1.3.2009          10     YES
7     2     2.3.2009     31.12.2009                           13     YES
Employee 2 gets assigned as of 1.2.2009 to the same position 10 on which employee 1 is already assigned. Therefore, as of 1.2.2009 emplyoee 1 is not anymore the primary employee of position 10. As employee 2 is leaving the position as of 2.3.09 employee 1 gets again primary employee of that position as of 2.3.2009.
Can any1 suggest me the logic for this?
Regards,
Rashmi
Edited by: Rashmi G P on Jul 13, 2009 9:13 AM

Answer 1

Hi,
I already have a customised table where i am  trying to set the flag.
My logic is something like this:
Declarations:
DATA: pos_flag TYPE char5.
select-OPTIONS : pos for /bic/qzemployee-/bic/zhrpostn.
SELECT zemployee datefrom dateto pos_flag FROM zemployee INTO CORRESPONDING FIELDS OF TABLE
it_QZEMPLOYEE where /bic/zhrpostn in pos.
*Sort it_zhrpostn by postion and datefrom
SORT it_QZEMPLOYEE BY /bic/zhrpostn datefrom.
*Looping it_zhrpostn.
LOOP AT it_QZEMPLOYEE.
MOVE-CORRESPONDING : it_QZEMPLOYEE TO it_qzemployee_temp.
*Appending it_zhrpostn_temp to collect each postion
APPEND it_qzemployee_temp.
*At end of position
AT END OF pos_flag.
*Looping it_zhrpostn_temp table
SORT it_qzemployee_temp BY datefrom DESCENDING.
pos_flag = 'YES'.
LOOP AT it_qzemployee_temp into wa_qzemployees.
IF pos_flag = 'YES' OR wa_qzemployees-/bic/zhrpostn EQ '00000000' OR wa_qzemployees-/bic/zhrpostn EQ '99999999'.
set the flag to yes
write:       pos_flag.
INSERT into /BIC/AZPA_DS0600 VALUES wa_final.
pos_flag = 'NO'.
ELSE.
set the flag to NO
write:       pos_flag.
ENDIF.
endloop.
refresh: it_qzemployee_temp.
ENDAT.
endloop.
But here the problem is the it is taking the most recent datefrom and setting the flag as yes. How to check whether someother employee is active in the given time period and set the flag as YES? Only 1 employee can be active in the date period given.
Thanks and Regards,
Rashmi