topic Re: Accessing a structure dynamical in Application Development and Automation Discussions

Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 12:28:35 GMT

Hi,

I hope someone knows a solution for the following problem:

I want to access a table. I know the tablename and create a structure to access the values, but the table and therfore also the fieldnames of the structure can differ everytime.

Thats why i want to access the structure dynamical. I get the fielsnames of the structure with the Function:

'RFC_GET_STRUCTURE_DEFINITION'

But when i program the following code:

...

LOOP AT lt_fields INTO ls_fields.

lv_fieldname = ls_fields-fieldname.

Append ls_Table-lv_fieldname TO serializedTable.

ENDLOOP.

...

the compile is saying: no such fieldname exists.

How can i make him clear, to use the content of the variable during runtime?????

Thanks for ure help or hint!

Re: Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 12:32:29 GMT

I think you'd need to use a field-symbol. Have a look at report SAPRDEMO_TABLES_IN_EXCEL; it uses the same function module.

Re: Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 12:33:06 GMT

Hi Jim,

Which table is "ls_Table" ?

You can try using field symbols for assigning fields dynamically.

Ravi.

Re: Accessing a structure dynamical

athavanraja — Tue, 25 Oct 2005 12:38:42 GMT

without the definition of

lt_fields

ls_fields

lv_fieldname

ls_Table

serializedTable

addressing your question would be tough for us.

Regards

Raja

Re: Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 12:41:07 GMT

@both:

i already tryed to solve it with Field Symbols, but failed.

How could I?

A FS is just a pointer maybe for something with unknown type. But i know the type of the table - means the name - which can differ from situation to situation. Therefore i just can access it dynamical.

if someone of u knows how i can solve it with FS, i would appreciate your help - i dont know how to solve it with FS.

Re: Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 12:48:28 GMT

no prob - if it help u:

lt_fields TYPE itab_RFC_FIELDS

ls_fields TYPE RFC_FIELDS,

lv_fieldname TYPE CHAR100

ls_Table TYPE ANY TABLE

serializedTable TYPE itab_XMLFile

Re: Accessing a structure dynamical

andreas_mann3 — Tue, 25 Oct 2005 12:53:32 GMT

Hi,

it seems to me that you can work with field-symbols:

assign (tab-name) to <f>.

append <f> to itab.

regards Andreas

Re: Accessing a structure dynamical

athavanraja — Tue, 25 Oct 2005 12:55:07 GMT

is this what you are looking for

DATA: tablename TYPE  x030l-tabname .

DATA: irfc_fields TYPE STANDARD TABLE OF rfc_fields .
DATA: wa_rfc_fields LIKE LINE OF irfc_fields .

DATA: serializedtable TYPE STANDARD TABLE OF string .

CLEAR tablename .

MOVE: 'MARA' TO tablename .

CALL FUNCTION 'RFC_GET_STRUCTURE_DEFINITION'
  EXPORTING
    tabname                = tablename
*   UCLEN                  = UCLEN
* IMPORTING
*   TABLENGTH              = TABLENGTH
  TABLES
    fields                 = irfc_fields
 EXCEPTIONS
   table_not_active       = 1
   OTHERS                 = 2
          .
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.

LOOP AT irfc_fields INTO wa_rfc_fields .

  APPEND wa_rfc_fields-fieldname TO serializedtable .

ENDLOOP .

Regards

Raja

Re: Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 13:10:37 GMT

@Andreas: The compile is not accepting: assign(tab-name)to <f>

if name is a variable that contains the real fieldname

@Raja: almost what im looking for, but

APPEND wa_rfc_fields-fieldname TO serializedtable

isnt correct. It should be:

APPEND StructureName-wa_rfc_fields-fieldname TO serializedtable

Re: Accessing a structure dynamical

Former Member — Tue, 25 Oct 2005 13:40:44 GMT

Thanks everybody for ure help.

I guess i found the solution:

lc_fieldname = ls_fields-fieldname.

CONCATENATE 'ls_Table-' lc_fieldname INTO lc_fieldname.

ASSIGN (lc_fieldname) TO <FS_FIELDNAME>.

Append <FS_fieldname> TO serializedTable.