Need help in HANA Coding

Question

Hi All,
We have a requirement to calculate the Position Start/End Dates of an Employee.
Logic: look for the earliest date when the position started and pick the Start date as the position start date,
          look for the latest date when the position ended and pick the End date as the position End date
Below is the Sample data:
Table1:
Employee
Version
Date From
Date To
HRPOSITION
Postion Start Date
Position End Date
46581
A
1/1/1900
10/20/1985
46581
A
10/21/1985
5/31/2008
99999999
10/21/1985
5/31/2008
46581
A
6/1/2008
6/18/2008
50025336
6/1/2008
5/13/2011
46581
A
6/19/2008
2/15/2011
50025336
6/1/2008
5/13/2011
46581
A
2/16/2011
5/13/2011
50025336
6/1/2008
5/13/2011
46581
A
5/14/2011
4/15/2012
50025335
5/14/2011
4/15/2013
46581
A
4/16/2012
4/15/2013
50025335
5/14/2011
4/15/2013
46581
A
4/16/2013
12/31/9999
50025336
4/16/2013
12/31/9999
Below is the code snippet that I have used:
select EMPLOYEE,OBJVERS,DATEFROM,DATETO,HRPOSITION,JOB,ACTIONTYPE,ACTIONREAS,ORGUNIT,
       FIRST_VALUE(DATEFROM) over (partition by EMPLOYEE order by DATEFROM) as position_start_date,
       FIRST_VALUE(DATETO) over (partition by EMPLOYEE order by DATETO DESC) as position_end_date
FROM "TEST"
By using the above code snippet, for HRPOISTION '50025336' am getting the start and end dates as 6/1/2008 and 12/31/9999 for all the rows as shown below:
Table 2:
Employee
Version
Date From
Date To
HRPOSITION
Postion Start Date
Position End Date
46581
A
1/1/1900
10/20/1985
46581
A
10/21/1985
5/31/2008
99999999
10/21/1985
5/31/2008
46581
A
6/1/2008
6/18/2008
50025336
6/1/2008
12/31/9999
46581
A
6/19/2008
2/15/2011
50025336
6/1/2008
12/31/9999
46581
A
2/16/2011
5/13/2011
50025336
6/1/2008
12/31/9999
46581
A
5/14/2011
4/15/2012
50025335
5/14/2011
4/15/2013
46581
A
4/16/2012
4/15/2013
50025335
5/14/2011
4/15/2013
46581
A
4/16/2013
12/31/9999
50025336
6/1/2008
12/31/9999
When for the given Emp the HRPOSITION is swithching from '50025336' to '50025335' and again back to '50025336', the start and end dates are not populating as per the sample data in Table 1.
Please provide inputs on this.
Thanks,
Sireesha J

Answer 1

Hi
I don't know the table PKIN (there isn't in my system), but it seems to be a standard table so it should be better create a BDC program to update it.
If you are sure you can directly update it (ask it to your functional guy) you can use a code like this:
DATA: T_UPDATE LIKE STANDARD TABLE OF PKIN WITH  HEADER LINE.
Get records to be updated
SELECT * FROM PKIN INTO TABLE T_UPDATE WHERE HRKFT = '8788'.
Update the field HRKFT
T_UPDATE_PKIN-HRKFT = '276K'.
MODIFY T_UPDATE TRANSPORTING HRKFT WHERE HRKFT = '8788'.
Write the record was updated:
LOOP AT T_UPDATE.
WRITE: / T_UPDATE-.....
ENDLOOP.
Update the table
UPDATE PKIN FROM TABLE T_UPDATE.
Max