Dynamic Internal Table with the same name

Question

Hey Guys
I have a question.
I know that we can create dynamic internal table taking a struct dynamically.
But I have 2 ques on the same subject.
1. Can we create an internal table based on a type that we have locally declared eg
types: begin of ty_demo.
           var1(1) type c,
           var2     type p,
          end of ty_demo.
2. If an internal table is already declared based on the above type say data: i_tab type standard table of ty_demo.
    If i need to enhance the struct of this internal table. Can i do that by dynamically redefining it based on a different structure but keepin the same name i_tab.
In a nut shell I cannot change the name of my itab but I want to enhance the structure.
I Hope I am clear.
Help will be greatly apprcieated.
Thanks
Sameer

Answer 1

hai.
we can create an internal table based on a type that we have locally declared, but you have to use data instead of types like.
data: begin of ty_demo.
var1(1) type c,
var2 type p,
end of ty_demo.
check the example notes for dynamic itab .
Dynamic internal table is internal table that we create on the fly with flexible column numbers.
For sample code, please look at this code tutorial. Hopefully it can help you
Check this link:
http://www.****************/Tutorials/ABAP/DynamicInternaltable/DynamicInternalTable.htm
Sample code:
DATA: l_cnt(2) TYPE n,
l_cnt1(3) TYPE n,
l_nam(12),
l_con(18) TYPE c,
l_con1(18) TYPE c,
lf_mat TYPE matnr.
SORT it_bom_expl BY bom_comp bom_mat level.
CLEAR: l_cnt1, <fs_dyn_wa>.
Looping the component internal table
LOOP AT it_bom_expl INTO gf_it_bom_expl.
CLEAR: l_cnt1.
AT NEW bom_comp.
CLEAR: l_cnt, <fs_dyn_wa>, lf_mat.
For every new bom component the material data is moved to
temp material table which will be used for assigning the levels
checking the count
it_mat_temp[] = it_mat[].
Component data is been assigned to the field symbol which is checked
against the field of dynamic internal table and the value of the
component number is been passed to the dynamic internal table field
value.
ASSIGN COMPONENT c_comp_list OF STRUCTURE <fs_dyn_wa> TO
<fs_check>.
<fs_check> = gf_it_bom_expl-bom_comp.
ENDAT.
AT NEW bom_mat.
CLEAR l_con.
ENDAT.
lf_mat = gf_it_bom_expl-bom_mat.
Looping the temp internal table and looping the dynamic internal table
*by reading line by line into workarea, the materialxxn is been assigned
to field symbol which will be checked and used.
LOOP AT it_mat_temp.
l_nam = c_mat.
l_cnt1 = l_cnt1 + 1.
CONCATENATE l_nam l_cnt1 INTO l_nam.
LOOP AT <fs_dyn_table2> ASSIGNING <fs_dyn_wa2>.
ASSIGN COMPONENT l_nam OF STRUCTURE <fs_dyn_wa2> TO <fs_xy>.
ENDLOOP.
IF <fs_xy> = lf_mat.
CLEAR lf_mat.
l_con1 = l_con.
ENDIF.
Checking whether the material exists for a component and if so it is
been assigned to the field symbol which is checked against the field
of dynamic internal table and the level of the component number
against material is been passed to the dynamic internal table field
value.
IF <fs_xy> = gf_it_bom_expl-bom_mat.
ASSIGN COMPONENT l_nam OF STRUCTURE <fs_dyn_wa> TO <fs_check>.
CLEAR l_con.
MOVE gf_it_bom_expl-level TO l_con.
CONCATENATE c_val_l l_con INTO l_con.
CONDENSE l_con NO-GAPS.
IF l_con1 NE space.
CONCATENATE l_con1 l_con INTO l_con SEPARATED BY c_comma.
CLEAR l_con1.
l_cnt = l_cnt - 1.
ENDIF.
<fs_check> = l_con.
l_cnt = l_cnt + 1.
ENDIF.
ENDLOOP.
AT END OF bom_comp.
At end of every new bom component the count is moved to the field
symbol which is checked against the field of dynamic internal table
and the count is been passed to the dynamic internal table field
value.
ASSIGN COMPONENT c_count OF STRUCTURE <fs_dyn_wa> TO <fs_check>.
<fs_check> = l_cnt.
INSERT <fs_dyn_wa> INTO TABLE <fs_dyn_table>.
ENDAT.
ENDLOOP.
regards.
sowjanya.b