How to fetch accounting document number from known material document number

Question

Hi,
Using MIGO transaction, by giving mblnr(material document number) as input, I get accounting document number by clicking FI document.I have to add this accounting document number in my report for corresponding known mblnr(material document number) values.
My question is how to fetch the accounting document number present in MIGO to add in my report program.
I used the xblnr(Reference Document Number) which is present both in mkpf and bkpf tables to fetch values.
I extracted xblnr values with known mblnr values from mkpf (Header: Material Document table).
and then extracted belnr(accounting document number) from bkpf (Accounting Document Header table) by using xblnr values.
But the query is running for a long time.
Is there any other method  to extract the values in a simpler way.
Kindly advise.
Thanks and Regards,
Sanjeev

Answer 1

I had the values of xblnr and some other fields such as mblnr, budat etc in wi_item table.
I created a new internal table i_xblnr and got down those values.
And then created a new internal table i_belnr and tried to get values of belnr in it.
The code I wrote is given below:
IF not wi_item[] is initial.
loop at wi_item.
   at new xblnr.
    ws_xblnr-xblnr = wi_item-xblnr.
     append ws_xblnr to i_xblnr.
   endat.
endloop.
  select belnr xblnr from bkpf into table i_belnr for all entries in i_xblnr where xblnr = i_xblnr-xblnr.
ENDIF.
Kindly look after it.Thank you.
Regards,
Sanjeev