topic Re: SUBROUTINES in Application Development and Automation Discussions

SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:10:02 GMT

Hii,

Can anyone give me the complete information about subroutines. How, PERFORM (Using and changing), FORM are used.

thanks,

raj

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:11:29 GMT

Hi,

Pls Go through the following link,you will get Deatil description on subrouitne

http://help.sap.com/saphelp_46c/helpdata/en/9f/db975c35c111d1829f0000e829fbfe/content.htm

http://help.sap.com/saphelp_nw70/helpdata/en/9f/db982c35c111d1829f0000e829fbfe/content.htm

SAMPLE Code

http://abaplovers.blogspot.com/2008/03/sap-abap-tutorial-on-subroutines.html

Regards,

Sujit

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:11:34 GMT

hi,

check out these links.

http://help.sap.com/saphelp_nw70/helpdata/en/9f/db982c35c111d1829f0000e829fbfe/content.htm

http://sap.ittoolbox.com/documents/popular-q-and-a/macro-vs-subroutine-1594#

regards

Sumit Agarwal

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:12:31 GMT

Hi,

Check the following link

[http://help.sap.com/saphelp_46c/helpdata/en/9f/db976935c111d1829f0000e829fbfe/content.htm]

regards,

Anirban Bhattacharjee

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:14:11 GMT

All are modularization techniques but typically the INCLUDE is for data structures, the PERFORM is for ABAP/4 subroutines and function modules are for non-ABAP/4 subroutines.

By Value:When the subroutine is called ,the formal parameters are copies of the actual parameters(with their own storage location)

By Value and Result : the formal parameters have a separate storage location .At the end of subroutine the value of the formal parameter is passed to the storage location of the actual parameter

Assigned

By Reference: when called the formal parameters are not allocated separate storage locations. Instead the address of the actual parameter is passed. Changes to the values of the formal parameters therefore have a direct effect on the assigned main program fields.

PERFORM <name> USING <a1> <a2> <a3> <a4>

FORM <name > [TABLES <table name>] USING VALUE (<f1>) CHANGING VALUE (<f2>)

Include:

INCLUDE <name>

Function modules:

CALL FUNCTION u2018function nameu2019

EXPORTING u2026

IMPORTING u2026

The EXCEPTIONS parameter is a section in the CALL FUNCTION statement where exceptional situations can be processed.

CALL FUNCTION u2018function nameu2019

EXPORTINGu2026

IMPORTINGu2026

EXCEPTIONS NOT_FOUND = 3D1

NOT_VALID = 3D2

OTHERS = 3D3

CASE SY-SUBRC

WHEN 1

WHEN 2

Regards,

Rajasekhar Reddy

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:19:24 GMT

SAP Help for performs in:

[ABAP|http://help.sap.com/saphelp_nwpi71/helpdata/en/9f/db976935c111d1829f0000e829fbfe/frameset.htm]

[Sapscript|http://help.sap.com/saphelp_nwpi71/helpdata/en/d1/803279454211d189710000e8322d00/frameset.htm]

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:19:52 GMT

Hello,

In abap, there is a concept of modularization to increase the reusability of the code/function.So along with subroutines,i would suggest you to even have a little idea of all these techniques.Just check these links in the sequence.

Modularization

http://help.sap.com/saphelp_nw70/helpdata/en/9f/db970e35c111d1829f0000e829fbfe/content.htm

Now u can go through :-

http://help.sap.com/saphelp_nw70/helpdata/en/9f/db974f35c111d1829f0000e829fbfe/content.htm

Go through the topis,i.e, Function modules & subroutines

Regards,

Bhumika

Re: SUBROUTINES

Former Member — Fri, 11 Jul 2008 09:23:42 GMT

Hi,

Yeah.Generally To avoid code redundancy we go for Subroutines. To complete a single complete process subroutines can be used.

an example will make u understand better.


DATA: itab TYPE STANDARD TABLE OF vbak,
      field1 TYPE vbak-vbeln,
      field2 TYPE vbap-posnr.



PERFORM get_data TABLES itab
                 USING field1
                 CHANGING field2


                .

*&---------------------------------------------------------------------*
*&      Form  get_data
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*      -->IT_TAB1    text
*      -->IV_FIELD1  text
*      -->OV_FIELD2  text
*----------------------------------------------------------------------*
FORM get_data TABLES it_tab1
              USING iv_field1
              CHANGING ov_field2


              .

ENDFORM.                    "get_data

Here note that the *order of TABLES, USING, CHANGING should not be changed as USING, TABLES, CHANGING which will not work*

the values you pass throuhg USING cannot be changed inside the subroutine ( so its READ ONLY )

the tables should be passed in TABLES which can be changed

Cheers

Kothand