Need Sales Contract No. in Invoice in SMARTFORM

Question

Hi,
    I need Sales Contract number in Invoice Smartform. I tried to fetch Contract number form VBFA table
but Contract number is not there but in Sales Document flow for invoice,it is created with reference of  Contract number but there is no Contract number in Table VBFA for that Billing Doc no. Is there any other method to fetch it..I want to fetch Sales Contract number and Sales contract date in Invoice Smartfrom
Please do needful.

Answer 1

try this logic
first select sales order from you invoice number
select vbelv posnv
from vbfa
where vbeln = invoice number
and vbtyp_N = 'M'
and vbtyp_V = 'C' .
Then use these sales order and get records from VBAP, field VGBEL and VGPOS has Sales order contract.
select vgbel vgpos
from vbap
where vbeln = vbfa-vbelv
and posnr = vbfs-posnr.