Field symbols in loop

[sudha_naik]

Hello ,

I have a loop like this

LOOP AT t_marm INTO p_mattab FROM sy-tabix.

IF p_mattab-matnr NE p_matnr.

CLEAR p_mattab.

EXIT.

ENDIF.

ENDLOOP.

t_marm is of type marm and p_mattab is of type meinh

If we are modifying marm with an include, error is thrown in this loop becoz of unicode.

I want to use field symbols for this .Could anyone please help me in this.

Thanks in advance

Sudha

[Former Member]

hi,

Field-symbols: <fs-name> as a modified internal tbale type.

LOOP AT t_marm INTO p_mattab FROM sy-tabix asssigning <fs_name>

IF p_mattab-matnr NE p_matnr.

<fs-name>-field = modifiing table field

modify itable.

CLEAR p_mattab.

EXIT.

ENDIF.

ENDLOOP.

I will give you example code. after 10mins

sekhar

[Former Member]

hi,

Again Sekar here

you can observe the following code, you might be get some idea........

Data: BEGIN OF i_easte OCCURS 0,

perverbr LIKE easte-perverbr,

logikzw LIKE easts-logikzw,

END OF i_easte.

FIELD-SYMBOLS:

<f_easts> LIKE i_easts.

IF sy-subrc EQ 0.

SELECT perverbr

logikzw

FROM easte

INTO TABLE i_easte

FOR ALL ENTRIES IN i_easts

WHERE logikzw EQ i_easts-logikzw.

ENDIF.

IF NOT i_easte[] IS INITIAL.

LOOP AT i_easts ASSIGNING <f_easts>.

READ TABLE i_easte WITH KEY logikzw = <f_easts>-logikzw.

IF sy-subrc EQ 0.

<f_easts>-perverbr = i_easte-perverbr.

ENDIF.

ENDLOOP.

ENDIF.

[Clemenss]

Hi Sudha,

if you use loop at itab .. assigning <fs> you will save time because nothing is ever copied into a header line but you are working on the table line directly. For this reason you will never use a MODIFY itab. I don't know why it is syntactically allowed although it has no effect and no sense at all.

You will not solve any unicode issues by just replacing the header line/work area with a field-symbol. You must analyze the error reason and resolve it. Field-symbols might help you when they are assigned to components of structure, but I really don't know what the unicode issue is in your case.

Regards,

Clemens

[matt]

Hi Clemens.

There is still a use for MODIFY. I frequently process tables where I don't know until runtime the structure. So I have to use ASSIGN COMPONENT. If I loop at ASSIGNING, then I have to do the component assignment inside the loop. If I instead create a work area, and loop INTO, I can do the component assignment outside the loop. This latter approach is more efficient.

Matt

[rainer_hbenthal]

You can not solve your unicode problem just by using fieldsysombols. Even fieldsymbols have a type and what you get is a typeconflict. Typeconflicts cant be solved this way.

[Former Member]

> t_marm is of type marm and p_mattab is of type meinh

That's your problem right there. Whether you're using a field symbol or a work area the type should be the same (unless you're trying to do the equivalent of a C union, which doesn't appear to make sense here).