enhancements

Former Member · ‎2008 Feb 11

Hi friends,

Are customer exits are part of enhancements.

wts the difference between customers exits an enhancements.

Former Member · ‎2008 Feb 11

Enhancements

The standard applications do not offer some of the functionality you need. The R/3 enchancement concept allows you to add your own functionality to SAP's standard business applications.

Different types of enhancements

Enhancements using customer exits

Customers' potential requirements which are not included in the standard software are incorporated in the standard as empty modification 'shells'. Customers can then fill these with their own coding. Enhancements can relate to programs, menus and screens. Upward compatibility is assured. In other words, SAP guarantees that the jump from the standard software to the exit and the interface which call the exit will remain valid in future releases.

Enhancements to ABAP/4 Dictionary elements

These are ABAP/4 Dictionary enhancements (creation of table appends), text enhancements (customer-specific key words and documentation for data elements) and field exits (creation of additional coding for data elements).

advantages of enhancements

Do not affect standard SAP source code

Do not affect software upgrades

Customer exit - The R/3 enhancement concept allows you to add your own functionality to SAP’s standard business applications without having to modify the original applications. SAP creates customer exits for specific programs, screens, and menus within standard R/3 applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.

Various types of customer exits

Menu exits

Screen exits

Function module exits

Keyword exits

Menu exit

Adding items to the pulldown menus in standard R/3 applications .

Screen exit

Adding fields to the screens within R/3 applications. SAP creates screen exits by placing special subscreen areas within a standard R/3 screen and calling a customer subscreen from within the standard dynpro's flow logic.

Function module exit

Adding functionality to R/3 applications. Function module exits play a role in both menu and screen exits.

keyword exit

Add documentation to the data elements of key words defined in the ABAP/4 Dictionary. The system displays this documentation whenever a user presses F1 to get online help for a screen field

Former Member · ‎2008 Feb 11

EXIT s are nothing but the R/3 Enhancements which allows you to add your own functionality to SAP’s standard business applications without having to modify the original applications.

Purpose

To introduce the techniques of enhancement in standard SAP system. SAP creates customer exits for specific programs, screens, and menus within standard R/3 applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.

Use

They do not affect standard SAP source code.

When you add new functionality to your SAP System using SAP’s exits, you do not alter the source code of standard SAP programs in any way. The code and screens you create are encapsulated as separate objects. These customer objects are linked to standard applications, but exist separately from SAP’s standard software package.

They do not affect software updates.

When you add new functionality to your SAP System using SAP’s exits, your objects (called customer objects) must adhere to strict naming conventions. When it comes time to upgrade a to a new software release, customer objects’ names ensure that they will not be affected by any changes or new additions to the standard software package.

MODIFICATIONS

Any change made to an SAP object in a customer system is called a modification. Customers usually modify their systems for one of two reasons. Either they make changes to the SAP standard in order to adjust the R/3 System to their specific business needs (actual modifications), or they alter individual SAP objects in order to correct an error (as recommended in an SAP error note).

You should only modify the SAP standard if the modifications you want to make are absolutely necessary for optimizing work flow in your company. Be aware that good background knowledge of application structure and flow are important prerequisites for deciding what kind of modifications to make and how these modifications should be designed.

ABAP DICTIONARY

Table Enhancements: There are two ways that you can add additional fields to tables without modifying your system.

Append Structures:

Append structures allow you to enhance tables by adding fields to them that are not part of the standard. With append structures, customers can add their own fields to any table or structure they want.

Append structures are created for use with a specific table. However, a table can have multiple append structures assigned to it.

Customizing Includes:

If customers know in advance that one of the tables or structures delivered to them by SAP needs to have customer-specific fields added to it, an SAP application developer can include these fields in the table using a Customizing include statement.

The same Customizing include can be used in multiple tables or structures. This provides for consistency in these tables and structures whenever the itself include is altered.

Append structures allow you to attach fields to a table without actually having to modify the table itself.

Append structures may only be assigned to a single table. A table may, however, have several append structures attached to it. Whenever a table is activated, the system searches for all active append structures for that table and attaches them to the table. If an append structure is created or changed and then activated, the table it is assigned to is also activated, and all of the changes made to the append structure take effect in the table as well.

You can use append structures in ABAP programs just as you would any other structure.

Note: When you copy tables that have append structures attached to them, the fields that were found in the append structure of the original table become part of the actual body of the target table.

Some of the tables and structures delivered with the R/3 standard contain special include statements calling Customizing includes. These are often inserted in those standard tables that need to have customer-specific fields added to them.

In contrast to append structures, Customizing includes can be inserted into more than one table. This provides for data consistency throughout the tables and structures affected whenever the include is altered.

Customizing include programs are part of the customer namespace: all of their names begin with 'CI_'. This naming convention guarantees that nonexistent Customizing includes do not lead to errors. No code for Customizing includes is delivered with the R/3 standard.

You create Customizing includes using special Customizing transactions. Some are already part of SAP enhancements and can be created by using project management (see the unit on 'Enhancements using Customer Exits').

The Customizing include field names must lie in the customer namespace just like field names in append structures. These names must all begin with either 'YY' or 'ZZ'.

When adding the fields of a Customizing include to your database, adhere to same rules you would with append structures.

Field Exits:

Field exits take you from a screen field with a data element reference to a function module. Field exits can be either global or local.

Field exit function modules adhere to the following naming convention:

prefix: FIELD_EXIT_

name: <data element name>_

suffix (optional): 0 to 9, A to Z

Text Enhancements:

Possible text enhancements include customer keywords and customer documentation of data elements.

Text enhancements differ from other application enhancements in that they take effect globally in all related SAP applications after activation (global enhancements).

SAP Application Enhancement

Application enhancements allow customers to enhance their application functions. Customer exits are preplanned by SAP and generally consist of several components.

Application enhancements are inactive when delivered and can be completed and activated by customers as they are needed.

Application enhancement characteristics:

Each enhancement provides you with a set of preplanned, precisely defined functions.

Each interface between SAP and customer functions is clearly defined.

As a customer, you do not need in-depth knowledge of how to implement SAP applications.

You do not need to adjust enhancements at upgrade because of new functions that SAP has developed.

SAP application programmers create SAP enhancements in transaction SMOD using function module exits, menu exits, and screen exits.

Customers are given a catalog containing an overview of existing SAP enhancements. They can then combine the SAP enhancements they want into an enhancement project using transaction CMOD.

SAP enhancements are made up of component parts. These components include function module exits, menu exits, and screen exits. A specific component may be used only once in a single SAP enhancement (this guarantees the uniqueness of SAP enhancements).

Customer enhancement projects consist of SAP enhancements. Each individual SAP enhancement may be used only once in a single customer enhancement program (this guarantees the uniqueness of a customer project).

SAP application programmers preplan function module exits, menu exits, and screen exits for their applications and combine them to create useful enhancements for the R/3 System.

Customers create their own enhancement projects for their systems using SAP enhancements. You can customize the individual components of an enhancement project by creating your own include programs (for function module exits), texts (for menu exits), and subscreens (for screen exits).

Customer Exits

Function Module Exits

Menu Exits

Screen Exits

Function Module Exits

Function module exits add functions to R/3 applications. Function module exits play a role in both menu and screen exits. When you add a new menu item to a standard pull down menu, you use a function module exit to define the actions that should take place once your menu is activated. Function module exits also control the data flow between standard programs and screen exit fields.

Menu Exits

Menu exits add items to the pull down menus in standard SAP applications. You can use these menu items to call up your own screens or to trigger entire add-on applications.

SAP creates menu exits by defining special menu items in the Menu Painter. These special entries have function codes that begin with "+" (a plus sign). You specify the menu item’s text when activating the item in an add-on project.

Screen Exits

Screen exits add fields to screens in R/3 applications. SAP creates screen exits by placing special sub screen areas on a standard R/3 screen and calling a customer sub screen from the standard screen’s flow logic.

Implementation of Enhancement in Customer System

First, use the project management function to choose the SAP enhancements that you want and create an enhancement project.

Next, edit your individual components using the project management function and document the entire enhancement project.

Finally, activate the enhancement project (this activates all of the project's component parts).

Difference between CMOD and SMOD?

http://www.sap-img.com/abap/what-is-the-difference-between-smod-and-cmod.htm

http://www.sap-img.com/abap.htm

http://sap.ittoolbox.com/groups/technical-functional/sap-r3-dev/diff-between-cmod-and-smod-236095

http://sap.ittoolbox.com/groups/technical-functional/sap-r3-dev/diff-between-cmod-and-smod-236107

check these links..

http://www.sapgenie.com/abap/tips_and_tricks.htm

http://www.sap-img.com/abap/field-exits-smod-cmod-questions-and-answers.htm

http://www.sap-img.com/abap/what-is-user-exits.htm

Reward points if useful.

Former Member · ‎2008 Feb 11

hi satish,

The R/3 enchancement concept allows you to add your own functionality to SAP's standard business applications.

Customer exits are not available for all programs and screens within the R/3 standard applications.

Former Member · ‎2008 Feb 11

Hai.

customer exits are one of the technique in enhancements.

Customer Exit is a hook and also we have to add our own functionality so we have to write the code in include file and activate that project in CMOD.

Whereas in User Exit ,we are writing the code in SAP namespace. So am thinking that its no need to create project and activating that project for user exit. Is it right? For User Exit also we have to create project please clarify me

User Exits:

-

User exits allow you to add additional functions to the SAP standard.

Programs with user exits contain subroutine calls at certain points in their syntax that are identified by the prefix USEREXIT. The actual user exits are located in an include that has been assigned to a module pool. This is where customers can include any changes (enhancements) that they want to make to the system. These includes are always processed during program flow.

Advantage: In principle, customers can modify anything they want that is found in the include (tables, structures, and so forth).

Disadvantage: SAP cannot check the individual enhancements themselves which often leads to errors in the enhancement process.

User exits (Function module exits) are exits developed by SAP. The exit is implemented as a call to a function module. The code for the function module is written by the developer. You are not writing the code directly in the function module, but in the include that is implemented in the function module.

Customer exits are not available for all programs and screens found in the SAP System. You can only use customer exits if they already exist in the SAP System.

Customer Exit

-

SAP creates customer exits for specific programs, screens, and menus within standard applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.

If you want to enhance the functionality of your SAP System, you should take advantage of the exits available in standard applications. There are two main reasons why you should use exits rather than modifying SAP software yourself. Add-ons attached to exits have the advantage that:

• They do not affect standard SAP source code

When you add new functionality to your SAP System using SAP’s exits, you do not alter the source code of standard SAP programs in any way. The code and screens you create are encapsulated as separate objects. These customer objects are linked to standard applications, but exist separately from SAP’s standard software package.

• They do not affect software updates

When you add new functionality to your SAP System using SAP’s exits, your objects (called customer objects) must adhere to strict naming conventions. When it comes time to upgrade a to a new software release, customer objects’ names ensure that they will not be affected by any changes or new additions to the standard software package.

Customer exits are not available for all programs and screens found in the SAP System. You can only use customer exits if they already exist in the SAP System. You can find more information about locating applications with pre-defined exits in Locating Applications that have Exits

regards.

sowjanya.b

Former Member · ‎2008 Feb 11

Hi