Transfering data from an internal table to field-symbol internal table

[Former Member]

H all.

I have an inernal table itab declared as itab type standard table

This table has some records . Now i have declared an internal table with field symbol

field-symbols : <it_tab> type standard table ,

<ls_tab> type any.

loop at itab assigning <ls_tab>.

append <ls_tab> to <it_tab>.

endloop.

I am trying to copy the content of the table itab into internal table <it_tab> . System is going for dump.

Any help would be appreciated.

Best Regards

[Former Member]

You should first assign something to <it_tab>. Field symbols are just only pointers. If you want to proccess data of itab with <it_tab> fields symbol try something like this

assign itab to <it_tab>.

[Former Member]

Hi Gtren,

If I do

assign itab to <it_tab>.

Then both will be refering the same data, change in data of a particular table will be refelected in the other.

Best regards

[former_member641978]

Hi

Just create ANOTHER internal table same as itab and assign your field symbol to that one .

All the changes will be only on other table.

At the end refer to that table instesd of your original itab

Best Regards

Yossi

[Former Member]

Hi Hari,

A change in the Internal Table will be reflected in the Field Symbol Internal Table.

Have a look at the code below :

DATA : lt_scarr type STANDARD TABLE OF scarr.
data : ls_scarr TYPE scarr.

FIELD-SYMBOLS : <fs_lt_scarr> TYPE STANDARD TABLE,
                <fs_ls_scarr> TYPE any.

*create DATA
data : count TYPE i VALUE 1.

SELECT * FROM scarr into TABLE lt_scarr.

ASSIGN lt_scarr to <fs_lt_scarr>.

ls_scarr-carrid = 'XX'.

MODIFY lt_scarr FROM ls_scarr INDEX 1.

LOOP AT lt_scarr ASSIGNING <fs_ls_scarr>.
  IF count = 30.
    exit.
  else.
    count = count + 1.

  ENDIF.
  APPEND <fs_ls_scarr> to <fs_lt_scarr>.

ENDLOOP.

Hope this helps.

Thanks,

Samantak.

[Former Member]

Hi,

<it_itab> is a field-symbol (which can point to an internal table), not the internal table.

You can not append rows to it before assigning any table to this field-symbol.

Please refer to the documentation.

Regards,

--

Przemysław

[MarcinPciak]

Hari,

Field symbols are not used as a mean of data transport b/w tables. Generally field symbols are used to "point" to some data in certain area.

"here you tell the system: let <ls_tab> "point" to values of particular row
loop at itab assigning <ls_tab>.  

For statement..

append <ls_tab> to <it_tab>.

...<it_tab> is empty ("points" to nothing) you simply can't append anything to it.

As previous speakers told you: you need a table to be assing first to it.

So you create another table say itab2. Then with the following...

assign itab2 to <it_tab>. "....you tell the system: let <it-tab> "point" to all records of table itab2 

Now you can "move" data b/w those two tables (itab2 to <it_tab> which is "pointitng" to itab2). Here however phisicall data trasnport takes place only b/w tables, no work area is used to transport rows of values, our field symbol <ls_tab> only "points" which row you want to trasnport from itab to itab2.

Hope this is more clear now

Marcin