Select statement not populating the internal table

Question

Hi,
I have a requirement where I have to upload a file from C drive, the fields in this file are VBELN, description & date of creation.
I am able to get this file into the internal table. After this i need to cross check the VBELN against VBRK-VBELN, if present then update a Z-table.... How do I do the cross check part ?...
if not tw_zvatcn[] is initial,
  select * from vbrk
      into table tw_vbrk
      for all entries in tw_zvatcn
       where vbeln = tw_zvztcn-vbeln
            and vkorg = p_vkorg.
  if sy-subrc = 0.
   modify ztzb from lw_zvatcn.
  endif.
endif.
Internal table tw_vbrk is coming blank, which is not correct because I see the data in db tbl VBRK

Answer 1

Is p_vkorg a parameter or select option.
If it is parameter and is blank you will not get data in the table.
In that case make a condition for that field also.
if not tw_zvatcn[] is initial.
if p_vkorg is not initial.
select * from vbrk
into table tw_vbrk
for all entries in tw_zvatcn
where vbeln = tw_zvztcn-vbeln
and vkorg = p_vkorg.
if sy-subrc = 0.
modify ztzb from lw_zvatcn.
endif.
else.
select * from vbrk
into table tw_vbrk
for all entries in tw_zvatcn
where vbeln = tw_zvztcn-vbeln.
if sy-subrc = 0.
modify ztzb from lw_zvatcn.
endif.
endif.
endif.