creating a workare from a generic internal table

[Former Member]

How can i create a workarea from an internal table in a method of a class. the problem is that the internal table gets a generic type when passing it to the method.

i tried:

data wa type ref to data.

create data wa like line of itab.

but when trying...

loop itab into wa.

... i get a conversion error.

[Former Member]

Hello Tobias,

the brutal way is:

Define into the method (or global) an internal table as

you need and relate the passing table to it.

fex.:

data: lt_tab type standard table of 'Hugo'.

data: lf_itab type 'HUGO'.

lt_tab[] = Par_Tab[]. " type any table

loop at itab into lf_itab.

...

endloop.

Hope i could help You

BR

Michael

[Former Member]

Hi Michael,

so problem is that the internal table i am passing to the method is in deed generic.so i do not know what structure my table has when passing it to the method and so i also do not know how the workarea has to look. so the workarea should be created dynamically when calling the method

[Former Member]

Hello Tobias,

In this case You have to use field-symbols.

This report creates list-output from any tables.

It shows You an geneally way to solve Your problem:

Hope I could help You

BR

Michael

REPORT zmbt_generic_list .

CLASS gcl_lister DEFINITION.

PUBLIC SECTION.

CLASS-METHODS:

mth_write_list IMPORTING par_table TYPE ANY TABLE.

ENDCLASS.

CLASS gcl_lister IMPLEMENTATION.

METHOD mth_write_list.

FIELD-SYMBOLS:

<zeile> TYPE ANY,

<field> TYPE ANY.

*:--- Record generisch einlesen

LOOP AT par_table ASSIGNING <zeile>.

*:--- Felder des Records generisch auslesen

DO.

ASSIGN COMPONENT sy-index

OF STRUCTURE <zeile> TO <field>.

IF sy-subrc <> 0.

EXIT.

ENDIF.

IF sy-index = 1.

WRITE:/001 <field>.

ELSE.

WRITE: <field>.

ENDIF.

ENDDO.

ENDLOOP.

ENDMETHOD.

ENDCLASS.

TYPES: BEGIN OF table_type,

name TYPE string,

gdat LIKE sy-datum,

END OF table_type.

DATA: gt_names TYPE STANDARD TABLE OF table_type.

DATA: gf_names TYPE table_type.

START-OF-SELECTION.

gf_names-name = 'Hugo Boss'.

gf_names-gdat = '19800401'.

APPEND gf_names TO gt_names.

gf_names-name = 'Liesschen Fleissig'.

gf_names-gdat = '19810401'.

APPEND gf_names TO gt_names.

END-OF-SELECTION.

CALL METHOD gcl_lister=>mth_write_list

EXPORTING par_table = gt_names.

*

[olivergrande]

Hallo Tobias,

if you really need a workarea you can also use the following:

DATA: wa TYPE REF TO data.

FIELD-SYMBOLS: <wa> TYPE ANY.

CREATE DATA wa LIKE LINE OF itab.

ASSIGN wa->* TO <wa>.

LOOP AT itab INTO <wa>.

ENDLOOP.

Regards,

Oliver