Difference between receiving, changing inporting, exporting and returning

[Former Member]

Hi OO ABAP Gurus

Please clear me the Difference between receiving, changing inporting, exporting and returning parameters of a method?

Many thanks in advance

Sandeep Sharma..

[Former Member]

Hai sandeep,

we are using changing and using when working with subroutines.

Using and changing : Both are same except, the order how they are taking the order of parameters in called subroutine.

In general,

Using: is used in subroutines when input parameter value doesn't change in the called program.

Changing: is used in subroutines when input parameter value does change in the called program and need to update its value in calling programming.

Importing, Exporting,Changing: These are used when working with function modules only.

Importing: To receive the parameter values from driver program

to function module

Exporting: To send the calculated parameter values to driver

program from function module.

Changing: It is used to send the updated parameter values

(Intially receiving from driver program)

from function module to driver program.

If useful, reward points

by

G.V.K.Prasad

Edited by: PRASAD GVK on Apr 9, 2008 8:57 AM

[Former Member]

test

[matt]

Forget what Prasad said - he's not talking about classes, or objects.

It depends on context. For CALLING a method.

Receiving - typed value returned by the method - maximum one of these

Importing - value returned by the method - many possible, all optional

Exporting - value sent to the method - many possible, some optional

Changing - value sent to the method , changed within the method, sent back from method - many possible some optional

For DEFINING a method

Returning - typed value returned to the caller- maximum one of these

Exporting - value sent to the caller - many possible, all optional

Importing - value sent by the caller - many possible, some optional

Changing - value sent by the caller, changed within the method, sent back to caller - many possible some optional

Note - only for returning/receiving must the parameter have a specific type.

See ABAP help for more details.

matt

[Former Member]

Hi Matt

Thanks for the answer..

But still i have one doubt..

As you define

For receiving and returning typed value

for opthers value

Can you please clear me betwee typed value and value

Please provide me a example if possible for you..

Many thanks in advance

[matt]

For receiving/returning you can't use a generic type, such as: ANY, ANY TABLE, STANDARD TABLE, CLIKE, NUMERIC.

You have to use a specific type:

• an ABAP type (e.g. I, C, string),

• a type defined in the data dictionary (a view, a database table, a data type ) e.g. T100, S38E

• a type REF TO DATA

• type REF TO some other class or interface

• another class's public type, e.g. ZCL_MYCLASS=>PUBLIC_TYPE

• a type defined with the type section of the class itself.

The point is that the type of the receiving/returning parameter must be known at compile time. For the other parameter types, it can be determined at runtime as well.

matt

[Former Member]

Hi,

When we define a Method, we can use following for Formal Parameters-

1- IMPORTING-for Input Formal Parameter

2-EXPORTING-for output Formal Parameter

3-CHANGING-for Input/outputt Formal Parameter

4-RETURNING-for outputt Parameter, passed by value only, and used with a Functional Method

When we call a Method, RECEIVING is used for Actual Parameter to receive the return value of Method in data object.

Thanks,

CP

[Clemenss]

Hi sandeep,

you should post a question after reading the [documentation|http://help.sap.com/abapdocu_702/en/abapcall_method_parameters.htm].

Regards,

Clemens

[Former Member]

As per i have seen:

Importing parameters can be optional or non-optional.

Exporting parameters can be optional or non-optional.

Changing parameters can be optional or non-optional.

But,

Returning Parameter is always optional by default.

Regards,

Pranoy

Edited by: Pranoy on Feb 2, 2012 6:57 AM

[Former Member]

Hi Experts,

Can i use changing parameter (in ooabap) to pass and receive the values at the same time for a mathod?

Moderator message: Please don't post a question on an old thread.

Edited by: Neil Gardiner on Feb 20, 2012 4:18 PM