Doubt in Function Module

[teja_divya]

Hello People !!

I am new to sap ABAP World. while i am learning Function modules in SAP ABAP, i have got some doubts about tables tab in the function module.

I understood follwoing things

import tab : here we pass the input

source code : we put our logic to get the output here

export : output is stored in this varialbes

But i did not understand 'TABLES' Tab over here Properly. I read some documents about it ,but still not understood properly.

Can anyone help me in understanding this  with the simple example ???

Regards,

Teja

[former_member202818]

Hi Teja,

Which used to declare internal table parameters for function module.

But it is now obsolete.

Regards

Sreekanth

[teja_divya]

Thnks Sreekanth for your information.

[former_member202818]

• 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 bodyis 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.

[teja_divya]

Sreekanth , can you help me by giving an example for this ?

[former_member202818]

Pass by value is not possible in formal parameters defined using TABLES.

Did u get this point?

we don't have an option to choose 'Pass by value' for Tables parameter.

Actual parameter- The variable passing to FM

Formal Parameter- The variable name defined in FM

Pass by value- Passing a copy of actual parameter to formal parameter

Pass by reference- Passing a reference(like pointer) to formal parameter.(So that the changes from FM will affect the actual parameter)

Since TABLES obsolete we can define a table parameter in Import or Export list.

Remember here we require a table type(can be created from se11) to define a table parameter.

[Former Member]

If you want to pass select-option (via selection screen) to call a function module then TABLE tab is used to declare a variable.

Or you can pass internal table data to function module...

[teja_divya]

Thanks Avirat!!

[ipravir]

Hi Teja,

In FM.

If you want SET / GET inforamtion in TABLE tab.

Just pass the structure in Associated Type Field, the parameter itself work as a table in FM.

Regards.

Praveer.

[vinodkumar_thangavel]

Hi,

The IMPORT shall have single Import parameters,

    EXPORT shall have single export parameters and

    TABLES shall have multiple parameters .

Regards,

Vinodkumar.

[Former Member]

Hi Teja,

if you want to pass multiple lines of data to your FM or your FM returns multiple lines of data then this TABLES tab is used.

For better understanding, you can execute standard FM's in se37 then you will get an idea how it works.

Thanks & Regards

Richa