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SAP-Field Exits

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Definition – Field Exits

• Field exits are branches from a screen field with a data element reference into a function module. Field exits can be selected globally or selectively.

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• When to apply a Field Exit.• Create a Field Exit.

Objectives

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Field Exits

Field Exits

EntryEntry

Function module

Obligatoryfield checks

checks andField formatchecks and

field transportForeign

key checks

System Help

SAP R/3 SAP R/3

Field 1

Field 2

ABAP Dictionary

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Creating Field Exits

R

Creating Field Exits

Global enhancements 1 1

Create field exit 2 2

Create function module 4 4

Field exit for data element ...? 3 3

Activate function module 6 6

Assign program/screen (for local field exits only)

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Activate field exit 8 8

Edit function module 5 5

System Help

Function Builder Function Builder

FIELD_EXIT_DTEL

Function module

System Help

Function module: Function module: Interface Interface

INPUT

Import parameter

OUTPUT

Export parameter

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Field Exits are branches from a screen field with data

element reference in a function module.

They are of 2 types – Global Field Exits– Local Field Exits.

Types of Filed Exits

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• Global Field Exits are not limited to one screen. If you use the data element on multiple screens, you will branch to a function module from all these screens once the exit is activated.

Global Field Exits

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• Local field exits are valid for one screen only. If you assign the screen of a specific program to the data element, then you will branch to a function module only from this screen after activation.

Local Field Exits

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• Prefix : FIELD_EXIT_• Name : <Data element name>_• Suffix (optional) : 0 to 9, A to Z

Syntax

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Data Entry

Check Required Fields

Check Field Format

Your Function Module Fires Here

Foreign Keys

When does it Trigger

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• We will create a field exit for data element ‘MATNR’.

• We will create a ‘Global Field Exit’. In which we will restrict users from entering a Material No ASD123.

• In the second instance we will create a ‘Local Field Exit’ so that it triggers only when the material no is 300 and check it using examples 1 & 2. And the filed exit should fire only in the second example.

Example

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Data element Matnr

Program : SAPLMGMM , Screen No. : 0060

Note : You can also use ‘MM02’ or ‘MM03’ transaction.

Example 1

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Data element Matnr

Program : SAPMM03Z

Screen No. : 0100

Example 2

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Creating Global Field Exits

• Global Field Exits ….step 1

Run the program using SE38

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Creating a Global Field Exit… step 2

Give your Data elements which you want to create a Field Exit

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Creating a Global Field Exit… 3

This will take you to SE37 transaction with a function module name by default

Just say Create

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Creating a Global Field Exit… 4

Write the code and generate it

And go back

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Creating a Global Field Exit… 5

Select the Data Element and say Activate

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Creating a Global Field Exit… 6

It will ask u for a

transport request

Just create it and say continue

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Creating a Global Field Exit…. 7

You have now created

a

GLOBAL FIELD EXIT

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Check the Global Field Exit…1

• Run the transactions ‘MM01’, ‘MM02’, ‘MM03’ or ‘MMAM’

It should not allow Material No ASD123 in the screens.

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Check the Global Field Exit…….2

We will check using transaction ‘MM02’.

i.e example 1.

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Check the Global Field Exit…….3

Enter Material no ASD123 press enter

you should see an error message here

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Creating a Local Field Exit

Select the Global Field

Exit you have created and then select

Assign prog / screen

Creating a Local Field Exit…….1

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Creating a Local Field Exit…….2

YOU GET A POPUP SCREEN

Enter the <Screen name> <screen no> and <fld.exit> that is

from A to Z or 0-9

And say continue

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Creating a Local Field Exit…….3

It will take you to the se37 screen with default function module name

Just say create

(this will not appear if the function mod already exists)

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Creating a Local Field Exit…….4

Write the code activate it.

Then go back to field exit screen.You will be asked for

a Transport Request just create the request and say

continue

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Creating a Local Field Exit…….5

You will see the program name and screen number appearing in the same line as the data element

Just select it and say activate

Your Local Field exit is complete

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Check the Local Field Exit…….1

We will check using transaction ‘MMAM’.

i.e example 2.

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Check the Local Field Exit……..2

Enter Material No =300 and material type then press Enter

You should see an error message here

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Check the Local Field Exit…….3

We will check using transaction ‘MM02’.

i.e example 1.

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Check the Local Field Exit…….4

Enter Material No 300 and press Enter

If the material is already created it show that material details or a error message other than the error message we have given should be shown here

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Thank You