topic Re: function module parameter in Application Development and Automation Discussions

function module parameter

former_member184611 — Wed, 18 Jan 2012 12:19:40 GMT

Hi all,

I want to extract the parameters for a given function module. I found this FM RPY_FUNCTIONMODULE_READ_NEW is useful for that. But I want the parameter attributes in more detail, like whether the parameter is table or structure or variable. If structure, its components, component's dictionary type, etc. I want to know, is there any other function modules or methods, that return the parameters of FM in detail.

Re: function module parameter

Former Member — Wed, 18 Jan 2012 12:29:11 GMT

if the type has a '-' in it that means its for a structure or a table else its a data element.

now if '-' is there then pass the first part of it to dd02L. and pick the table category

TRANSP Transparent table

INTTAB Structure

please search a bit, we posted 3 threads for the same requirement today

Re: function module parameter

RicardoRomero_1 — Wed, 18 Jan 2012 17:56:27 GMT

Hi,

Check this thread:

you can use FM FUNCTION_IMPORT_INTERFACE.

Re: function module parameter

former_member184611 — Thu, 19 Jan 2012 09:17:13 GMT

hi ricardo,

that link was really useful.. i found RFC_GET_FUNCTION_INTERFACE_US very useful. Still have some problems. The changing, exporting parameters may contain, structures, tables, variables. Need to differentiate between that .

Thank you

Re: function module parameter

RicardoRomero_1 — Thu, 19 Jan 2012 09:35:19 GMT

Hi,

You can find the type in table TADIR, searching by field OBJ_NAME. Here you have the field OBJECT that indicates the object type. Or as said Soumyaprakash in table DD02L.

If it's a table or a structure you can find all its components in table DD03L.

Hope this help you.

Re: function module parameter

Former Member — Thu, 19 Jan 2012 09:45:40 GMT


The changing, exporting parameters may contain, structures, tables, variables. Need to differentiate between that .

aby,

that was the sole suppose of me telling you about DD02L

Re: function module parameter

rajesh_kumar2 — Thu, 19 Jan 2012 09:46:59 GMT

Hello ,

You will have to use the FM 'RFC_GET_STRUCTURE_DEFINITION' in conjunction with the FM RFC_GET_FUNCTION_INTERFACE_US to get the desired details.

Regards,

Rajesh

Re: function module parameter

former_member184611 — Thu, 19 Jan 2012 09:51:04 GMT

hi ricardo,

Finding all the components and their technical details, that I have already done using the help of RTTS classes. But the issue is, since the FM return only the structure type, i am not able to find dynamically whether its a structure or internal table. In my requirement the output table should mention whether its a structure or internal table.

Thank you

Re: function module parameter

Former Member — Thu, 19 Jan 2012 10:02:43 GMT

the out of RFC_GET_FUNCTION_INTERFACE_US is like this

PARAMCLASS I ==> i means import, E is export, T is table..

PARAMETER WAIT

TABNAME BAPITA

FIELDNAME WAIT

so a combination of paramclass and tabname can help you determine if its a table or a structure

if I or E and a tabname is not a 'table type' then its a structure

if I or E and a tabname is a 'table type' then its a table

if T then its a table

Re: function module parameter

former_member184611 — Thu, 19 Jan 2012 10:05:24 GMT

hi soumyaprakash,

for example, if the iput is BAPI_PO_CREATE...

In input parameter it has a structure po_header type BAPIEKKOC

and in Tables po_item type BAPIEKPOC.

Like that in changing and exporting parameter there could be tables and structures. Then how would i find whether that is a internal table or structure?

Thanks

Re: function module parameter

Former Member — Thu, 19 Jan 2012 10:20:41 GMT

I will give you an example

P PARAMETER                      TABNAME
I PO_HEADER                      BAPIEKKOC     ==> PO_HEADER will be a structure as BAPIEKKOC  is not in DD40L(so its not a table type)
E PURCHASEORDER                  BAPIEKKOC  ==> same as above
T PO_ITEMS                       BAPIEKPOC        ==>po_item is a internal table 
T RETURN                         BAPIRETURN        ==> return is a internal table

Re: function module parameter

former_member184611 — Mon, 30 Jan 2012 10:08:13 GMT

hi Soumyaprakash,

Thanks for your great help. Your method is ok. In my case, I have to loop the changing and export parameter table. So if I use your method I have to write the SELECT statements inside the loop, which I feel not as an optimized way. Instead, I have tried another way using the help of RTTI Classes and found helpful. Below am adding the sample code.

DATA: lo_tabledescr TYPE REF TO cl_abap_tabledescr,
      lo_structdescr TYPE REF TO cl_abap_structdescr,
      lo_elemdescr TYPE REF TO cl_abap_elemdescr,
      lv_linetypename  TYPE string,
      t_tabdescr      TYPE abap_compdescr_tab.


CALL FUNCTION 'RPY_FUNCTIONMODULE_READ_NEW'
  EXPORTING
    functionname       = 'BAPI_PO_CREATE'
  TABLES
    import_parameter   = t_imp_para
    changing_parameter = t_cha_para
    export_parameter   = t_exp_para
    tables_parameter   = t_tab_para
    exception_list     = t_exc_list
    documentation      = t_docu
    SOURCE             = t_source.


LOOP AT t_cha_para INTO x_cha_para.

  TRY.
**If this try is success then it is a table type. If its fails it goes to next TRY for Structure type.

**Note: To create a table in Changing Parameter, the type should be a dictionary table type.

      lo_tabledescr   ?= cl_abap_typedescr=>describe_by_name( x_cha_para-dbfield ).
      lo_structdescr  ?= lo_tabledescr->get_table_line_type( ).
      lv_linetypename = lo_structdescr->get_relative_name( ).
      lo_structdescr ?= cl_abap_typedescr=>describe_by_name( lv_linetypename ).
       t_tabdescr[]  =  lo_structdescr->components[].


    CATCH cx_root.

      TRY.
**If this try is success then it is a structure type.

          lo_structdescr ?= cl_abap_typedescr=>describe_by_data( x_cha_para-dbfield ).
           t_tabdescr[] = lo_structdescr->components[].

        CATCH cx_root.
**If both the above TRY throws exception, it means its a variable.

          lo_elemdescr ?= cl_abap_typedescr=>describe_by_name( x_cha_para-dbfield ).

      ENDTRY.

  ENDTRY.
ENDLOOP.

********************

There may be other solution for this requirement. Since my issue is solved, am closing this thread. Thanks all for your great support.