Dynamic structure creation in SAP ABAP using classes

[former_member4082]

Hi Experts,

I need to create dynamic structure and internal table to append the records to the corresponding internal table. I am using get( ) from class CL_ABAP_STRUCTDESCR. But not getting the required result.

Can anyone suggest what should be the approach for the same.

Thanks and Regards,

Aditya Mane

[FredericGirod]

Could you post your code ? (using the [CODE] button)

[Sandra_Rossi]

Your code is missing

+

What result do you get and what do you expect?

[emanuel_klenner]

Here is an example for dynamically creating a work area and internal table and then using that for a dynamic SELECT. I hope it helps.

REPORT zema_dynamic_itab.

DATA:
lo_itab TYPE REF TO cl_abap_tabledescr,
lo_struc TYPE REF TO cl_abap_structdescr,
lo_data TYPE REF TO cl_abap_datadescr,
lo_type TYPE REF TO cl_abap_typedescr,
gt_keys TYPE string_table.

DATA: lt_dfies TYPE TABLE OF dfies,
ls_dfies LIKE LINE OF lt_dfies.

DATA: lt_comp TYPE abap_component_tab,
ls_comp LIKE LINE OF lt_comp.

PARAMETERS:
p_tab TYPE ddobjname DEFAULT 'ICLITEM'.

START-OF-SELECTION.
CALL FUNCTION 'DDIF_NAMETAB_GET'
EXPORTING
tabname = p_tab
TABLES
dfies_tab = lt_dfies
EXCEPTIONS
not_found = 1
OTHERS = 2.

LOOP AT lt_dfies INTO ls_dfies
WHERE keyflag IS NOT INITIAL.
APPEND ls_dfies-fieldname TO gt_keys.

ls_comp-name = ls_dfies-fieldname.

CALL METHOD cl_abap_datadescr=>describe_by_name
EXPORTING
p_name = ls_dfies-rollname
RECEIVING
p_descr_ref = lo_type
EXCEPTIONS
type_not_found = 1
OTHERS = 2.

ls_comp-type ?= lo_type.

APPEND ls_comp TO lt_comp.
ENDLOOP.

TRY.
CALL METHOD cl_abap_structdescr=>create
EXPORTING
p_components = lt_comp
RECEIVING
p_result = lo_struc.

CATCH cx_sy_struct_creation .
ENDTRY.

TRY.
* Create called multiple times for the same structure can cause memory problems. Use get method instead
CALL METHOD cl_abap_tabledescr=>get
EXPORTING
p_line_type = lo_struc
RECEIVING
p_result = lo_itab.

CATCH cx_sy_table_creation .
ENDTRY.

BREAK-POINT.

DATA: lo_tab TYPE REF TO data.
FIELD-SYMBOLS: <lt_tab> TYPE table.

CREATE DATA lo_tab TYPE HANDLE lo_itab.
ASSIGN lo_tab->* TO <lt_tab>.

SELECT (gt_keys) INTO TABLE <lt_tab>
FROM (p_tab) UP TO 100 ROWS.

  BREAK-POINT.

[RaymondGiuseppi]

Did you perform a simple search in forum such as "CL_ABAP_STRUCTDESCR" in wiki part, you should