using struture which know the "name"

[Former Member]

Hi,

I would like to know which way can I use the structured that I defined somewhere before by passing only the name of the structure. The name of the structure is based on some standardized naming conversion, e.g. 'Zstr_R0001_part1'

Zstr - identifier of customized structure

R0001 - the program name

part1 - the additional information

the components are already provided. However, how can I use the 'Name' to get the structure?

Regards,

Mandy Au

[seshatalpasai_madala]

hi,

YES you can.

use the Class CL_ABAP_TYPEDESCR and method describe_by_name.

Then use CREATE DATA to create data.

Regards,

Sesh

[Former Member]

thanks! I found the class and trying to look into the methods.....

however, when I try to include the class to my program....

there is an error occured:

You cannot generate instatnces of the abstract class "CL_ABAP_TYPEDESCR"

Is that I missed something? or there is another way to call this class?

Here is my code:

data objtypedescr type ref to CL_ABAP_TYPEDESCR .
create object objtypedescr.

and the error occured in line 2.

Thanks.

[kostas_tsioubris]

Hi,

check this example code.

REPORT Z.

TYPES: BEGIN OF STRUCT,
         MATNR LIKE MARA-MATNR,
         MAKTX LIKE MAKT-MAKTX,
       END OF STRUCT.

DATA: IT_TABLE TYPE STANDARD TABLE OF STRUCT.


DATA:   LR_DATADESCR TYPE REF TO CL_ABAP_DATADESCR,
            LR_TABLEDESCR TYPE REF TO CL_ABAP_TABLEDESCR.

FIELD-SYMBOLS: <FS> TYPE ABAP_KEYDESCR.


LR_TABLEDESCR ?= CL_ABAP_TABLEDESCR=>DESCRIBE_BY_DATA( IT_TABLE ).

LOOP AT LR_TABLEDESCR->KEY ASSIGNING <FS>.

  LR_DATADESCR ?= CL_ABAP_TYPEDESCR=>DESCRIBE_BY_NAME( <FS>-NAME ).

ENDLOOP.

Kostas

[Former Member]

Thanks, I can get the structure now.

One more thing I want to ask is about the create data.

DATA: BEGIN OF itab OCCURS 0,
          mandt like fkkop-mandt,
          vkont like dfkkop-vkont,
          OPBEL like dfkkop-OPBEL,
      END   OF itab.

form get_dynamic_structure_by_name.

Data : lr_rtti_struc TYPE REF TO cl_abap_structdescr.
lr_rtti_struc ?= CL_ABAP_TYPEDESCR=>describe_by_name( 'itab' ).

endform.

I would like to know how can I create a structure which is having the same fields as itab?

I have try this before, but it does not work!

*&---------------------------------------------------------------------*
*& Form get_structure
*&---------------------------------------------------------------------*
* GET THE STRUCTURE OF THE TABLE.
*----------------------------------------------------------------------*
FORM get_structure.

DATA : idetails TYPE abap_compdescr_tab,
xdetails TYPE abap_compdescr,
ref_table_des TYPE REF TO cl_abap_structdescr.

REFRESH : ifc,ifc_char.

ref_table_des ?=
cl_abap_typedescr=>describe_by_name( text1 ).
idetails[] = ref_table_des->components[].

LOOP AT idetails INTO xdetails.

CLEAR xfc.
xfc-fieldname = xdetails-name .
xfc-datatype = xdetails-type_kind.
xfc-inttype = xdetails-type_kind.
xfc-intlen = xdetails-length.
xfc-decimals = xdetails-decimals.

APPEND xfc TO ifc.

ENDLOOP.

ENDFORM. "get_structure

error is about abap_compdescr_tab.

I want to know if this method is workable in my case? or I should use another one?

You guys are really really really helpful!!! Thanks a lot!!!!

[kostas_tsioubris]

Why don't you use the CREATE DATA statement directly since you have the structure name?

see this code.

REPORT Z1.

TYPES: BEGIN OF struc,
a TYPE i,
b TYPE c LENGTH 8,
END OF STRUC.

DATA: dref TYPE REF TO DATA,
tname TYPE string.

FIELD-SYMBOLS:  <f> TYPE any.


tname = 'STRUC'. "
CREATE DATA dref TYPE (tname).
ASSIGN dref->* TO <f>.

[Former Member]

OH!!! THANKS A LOT!!!

This already solved my problem!!!!

Thanks!

Regards,

Mandy

[Former Member]

If u know the structure name then using field-symbols u can access that structure..

field-symbols : <fs> type any.

assign (STR_NAME) to <fs>.

Regards

Prax

[Former Member]

I only know the name in string....