How to read the hierarchy data from the same table using loop in AMDP method

Hi All,

We have a requirement to get the top partner from BUT050 table.

Here the Top parent is nothing but the top most in the hierarchy of the partners from BUT050.

Example:

For partner 1234 (BUT050-PARTNER1) there is partner 3523(BUT050-PARTNER2) one level above

For partner 3523(BUT050-PARTNER1)  there is partner 4544 (BUT050-PARTNER2) last level .

so in this case for the partner 1234 the Top parent is 4544 .

I have created AMDP Procedure method to get the top-parnet and below given is the logic implemented in AMDP method.

Here i have implemented a recursive logic with the WHILE loop to get the top most hierarchy partner from the same table BUT050

IV_Parent is the input partner and ev_top_parent is the output value.

AMDP Procedure Method:

    DECLARE lv_date VARCHAR(8) := TO_VARCHAR (current_date, 'YYYYMMDD');

    DECLARE found INT := 1;

          iv_partner1 =  SELECT partner1 FROM but050

                          WHERE partner2 = iv_partner

                          AND reltyp = :iv_hierarchy

                          AND date_to >=  :lv_date

                          AND date_from <= :lv_date;

     WHILE found <> 0  do

       select partner1 into ev_top_parent from :iv_partner1;

                       iv_partner1 =  SELECT partner1 FROM but050

                       WHERE partner2 in ( select partner1 from :iv_partner1 where partner1 is not null)

                       AND reltyp = 'ZBP004'

                       AND date_to >= :lv_date

                       AND date_from <= :lv_date;

       select COUNT ( partner1 ) INTO found FROM :IV_PARTNER1;

    END WHILE;

This method is working fine, but here it is only taking one single partner and getting the top parent as output.

Now i would like to convert this mehtod so as to accept n number of partners (not one single partner) as input and should process each partner to get the top parent.

Could anyone guide me how can i handle the given AMDP method further so as to work some how it is within another loop from other AMDP method.

Thanks.

Regards,

Laxman.P