Use of LINE OF statement

Question

Hi all,
what is the use of LINE OF statement?
DATA:       itab_iv_item TYPE TABLE OF   bapi_incinv_create_item,
                 itab_return TYPE TABLE OF bapiret2.
DATA:       wa_iv_item LIKE LINE OF itab_iv_item,
                 wa_return LIKE LINE OF itab_return.
what these statements do
DATA:       wa_iv_item LIKE LINE OF itab_iv_item,
                 wa_return LIKE LINE OF itab_return.
Thanks in advance
krupali.

Answer 1

Hi KR.,
1.
types: begin of st1,
          <fields>
          end of st1.
data: wa type st1.
Here we are declaring the wa by using the syntax TYPE. because here we know the structre.
2.
data: wa type vbak.
Here we are declaring the wa wrt Database Table so here we can use TYPE syntax again.
3.
data: begin of itab occurs 0,
            <fields>
            end of itab.
    data: wa like line of itab.
Here we are declaring the wa wrt internal table which is having header line and body, so we can't use TYPE here, we must go for LIKE LINE OF syntax.
4.
data: itab like vbak occurs 0 with header line.
    data: wa like line of itab
       (or)
     data: wa type vbak.
Hope it clear?
Thanks,
Naveen.I