topic Re: functional moduls in Application Development and Automation Discussions

functional moduls

Former Member — Thu, 07 Feb 2008 05:44:41 GMT

Dear all,

can any one help me how to us function moduls

regards

reddy

Re: functional moduls

Former Member — Thu, 07 Feb 2008 05:47:23 GMT



DATA: line(80) TYPE c LENGTH 80, 
      text_tab LIKE STANDARD TABLE OF line, 
      fleng    TYPE i. 

... 

CALL FUNCTION 'GUI_DOWNLOAD' 
  EXPORTING 
    filename         = 'c:\temp\text.txt' 
    filetype         = 'ASC' 
  IMPORTING 
    filelength       = fleng 
  TABLES 
    data_tab         = text_tab 
  EXCEPTIONS 
    file_write_error = 1 
    invalid_type     = 2 
    no_authority     = 3 
    unknown_error    = 4 
    OTHERS           = 10. 

CASE sy-subrc. 
  WHEN 1. 
    ... 
  ... 
ENDCASE.

Re: functional moduls

Former Member — Thu, 07 Feb 2008 05:48:52 GMT

HI,

You can view the function modules thru transaction code SE37.

Read the documentation and analyse whether it is of your use or not. If suitable then you can use in your program by pressing Control+F6 or there is a button for calling a POP-UP in which you will mention the function module you want to use.

Pass all the parameters that are mandaory to pass.

Always keep in mind that while passing the parameters it should be type compatibel with the parameters defined in the function module definition (in SE37).

Jayant Sahu

Re: functional moduls

Former Member — Thu, 07 Feb 2008 05:49:31 GMT

Hi,

goto SE37 and search for the desired function module as per you requiremnt.

In the program where uwant to use it. click on pattern, write the name of the function module.

the impportinga dn exporting parameters will appear. u cna use them just as the variables and internal tables used in the program. the input to the function module will be the exporting parameters in the program and its output will be the importing parameters.

reward appropriate points.

regards,

Mansi.

Re: functional moduls

Former Member — Thu, 07 Feb 2008 05:51:05 GMT

Hi Karthik,

In ur report program go to pattern button above click on it whenever u need a fm TO BE USED....GIVE THE NECESSARY INPUTS ....

Was this ur requirement??

Regards,

Kaveri

Re: functional moduls

Former Member — Thu, 07 Feb 2008 05:53:34 GMT

hi karthik,

Function Modules are Glopbal ABAP programs created by SAP for reusable purpose.they have IMPORT,EXPORT and TABLE parameters, and EXCEPTIONS to through when error occurs.

You can create them from TCode SE37.

Go through the following doc:

Function modules are cross-program, reusable procedures that are organized into function groups, and whose functions are implemented between the statements FUNCTION and ENDFUNCTION. Function modules and their interfaces are created in the Function Builder.

Function Module Interfaces

The parameter interface of a function module is defined in the Function Builder. It includes the definition of interface parameters and the specification of exceptions that can be triggered by a function module. The Function Builder automatically generates comment lines below the FUNCTION statement in the source code of the function module, which represent the interface of the function module with the following syntax:

Syntax

... IMPORTING parameters

EXPORTING parameters

CHANGING parameters

TABLES table_parameters

{RAISING

The syntax and semantics of IMPORTING, EXPORTING, CHANGING, RAISING, and EXCEPTIONS mainly correspond to the definition of method interfaces with CLASS-METHODS. The additional option of defining table parameters using TABLES is obsolete.

Interface parameters

The interface parameters are defined on the relevant tab pages in the Function Builder.

IMPORTING parameters are input parameters. When the function module is called, a suitable actual parameter must be specified for every non-optional input parameter. The content of the actual parameter is passed to the input parameter when the call is made. The content of an input parameter for which 'pass by reference' is defined cannot be changed in the function module.

EXPORTING parameters are output parameters. When the function module is called, a suitable actual parameter can be specified for every output parameter. The content of an output parameter that is defined for 'pass by value' is transferred to the actual parameter if the function module is completed without errors. An output parameter that is defined for pass by reference is not initialized when the function module is called.

CHANGING parameters are input and output parameters. When the function module is called, a suitable actual parameter must be specified for every non-optional input or output parameter. When the function module is called, the content of the actual parameter is passed to the input/output parameter, and when the function module is completed, the content of the input/output parameter is passed to the actual parameter.

TABLES parameters are table parameters. Table parameters are obsolete CHANGING parameters that are typed as standard tables with a header line. If an internal table without a header line or a table body is passed as an actual parameter to a formal parameter of this type, an empty local header line is generated in the function module. If an internal table with a header line is used as an actual parameter, both the table body and the header line are passed to the function module. Pass by value is not possible in formal parameters defined using TABLES. Formal parameters defined with TABLES can be replaced by formal parameters defined with CHANGING. A local work area can be created for the internal table in the function module by using the addition LIKE LINE OF itab of the DATA statement.

Exceptions

The exception of a function module are defined on the Exceptions tab page in the Function Builder. Here you can select exception classes to define whether class-based exceptions are declared or non-class-based exception are defined. Class-based exceptions are represented in the above syntax by RAISING, and non-class-based exceptions are represented by EXCEPTIONS.

The addition RAISING is used to declare class-based exceptions that can be propagated from the function module to the caller. Exceptions in the categories CX_STATIC_CHECK and CX_DYNAMIC_CHECK must be explicitly declared, otherwise a propagation can lead to an interface violation. A violation of the interface leads to the treatable exception CX_SY_NO_HANDLER. Exceptions of the category CX_NO_CHECK are implicitly always declared. The declaration of exceptions of the category CX_STATIC_CHECK is statically checked in the syntax check. For exceptions of the category CX_DYNAMIC_CHECK, the check is not performed until runtime. In a function module in which class-based exceptions are declared with the RAISING addition, the statement CATCH SYSTEM-EXCEPTIONS cannot be used. Instead, the relevant treatable exceptions should be handled in a TRY control structure.

The addition EXCEPTIONS is used to define a list of non-class-based exceptions that can be triggered in the function module using the statements RAISE or MESSAGE RAISING. Exceptions defined in this way - as with formal parameters - are bound to the function module and cannot be propagated. If an exception of this type is triggered in a function module, and no return value has been assigned to it with the homonymous addition EXCEPTIONS of the CALL FUNCTION statement when the call was made, this leads to a runtime error.

Note

For new developments after release 6.10, SAP recommends that you work with class-based exceptions that are independent of the function module.

RFC is a technology which is used to access a functions (Modules) from

the remote systems.

If a function module is set as remote enabled which can be access from

the remote system via RFC.Eg: U can access the Remote enabled function modules in ur VB,Webdynpro,Java,Visual composer program.

A function module can be set as remote enabled by SE37->Go to ur FM->click the option Button "remote enabled".

But Normal function modules can not accessd from the remote system.

Good Example for RFC enabled function module is : BAPI(Business Application Programming Interface)

Note: All BAPIs are Remote enabled but not all remote enabled function modules are BAPI.

CALLING A FUNCTION MODULE:

1)In U ABAP Editor --> Click "Patter" ---> Selection Option Button "Call Function"

--> Write the Corresponding FM name --> Hit Enter

2)The appropriate import ,export Parameters will be displayed in ur editor

3)Pass the Values Here.

Also check these links.

Check this link:

http://help.sap.com/saphelp_erp2004/helpdata/en/9f/db988735c111d1829f0000e829fbfe/content.htm

http://help.sap.com/saphelp_nw2004s/helpdata/en/ef/d94b78ebf811d295b100a0c94260a5/frameset.htm

http://help.sap.com/saphelp_nw2004s/helpdata/en/43/41341147041806e10000000a1553f6/frameset.htm

Check this link:

http://help.sap.com/saphelp_erp2004/helpdata/en/9f/db988735c111d1829f0000e829fbfe/content.htm

http://help.sap.com/saphelp_nw2004s/helpdata/en/ef/d94b78ebf811d295b100a0c94260a5/frameset.htm

http://help.sap.com/saphelp_nw2004s/helpdata/en/43/41341147041806e10000000a1553f6/frameset.htm

See the following links:

http://help.sap.com/saphelp_erp2005vp/helpdata/en/9f/db970e35c111d1829f0000e829fbfe/frameset.htm

http://help.sap.com/saphelp_nw04/helpdata/en/26/64f623fa8911d386e70000e82011b8/content.htm

you can go to Se37 and see the documentation of each of the desired funciton modules seeing the IMPORT, EXPORt, CHANGING AND TABLES paramters adn code accordingly..

here are few links

[http://help.sap.com/saphelp_46c/helpdata/en/d1/801ee8454211d189710000e8322d00/frameset.htm]

[http://www.erpgenie.com/abap/functions.htm]

reward poits if useful

Rohan malik

Re: functional moduls

Former Member — Thu, 07 Feb 2008 05:56:18 GMT

in u r report program keep the cursor at a particular position where u want the function module to be triggered and click ctrl+f6 or there is a tab called patterns click on that then in that u can give the function module name and click on continue.

now uncomment the exporting and inporting parameters and exceptions.

the values which u r passing to the function module are importing to FM and the values which u r getting as output are exporting to FM.

the exporting parameters of FM are importing parameters to report .

Re: functional moduls

Former Member — Thu, 07 Feb 2008 06:00:37 GMT

hi,

all the function modules are available in se37

if u want to use function module in se38 then go to the pattern

give the function module name press enter key

you can use function module in se 38

here exporting parameter are parameter which u pass it to function module

importing parametrs are parameters which u get data from function module

exception should be handle explicitly

we can also test function module in se37 also