Businesses’ needs change over time. A report created six months ago may still be useful. However, business requirements can change over time. Teams may request additional fields, new selection options, or updated calculations.
This is a common occurrence in the life of an SAP ABAP developer. It’s not just a matter of adding some lines of code. The developer must first understand the existing program. Next, they should identify the sections that need changes. They must also check related functions and make sure the updates do not affect existing results.
Understanding existing programs is an important skill when learning SAP ABAP. Students should know how to read, analyze, and update existing code. If you are thinking of doing SAP ABAP Training in Pune, you could also know how to use the existing programs and not just how to generate new reports from scratch.
For what reasons do businesses ask for changes in the existing ABAP programs?
SAP applications support business activities across different departments. Employees regularly use reports and programs to manage their work. These programs may need updates when business processes change.
Look at a purchase report of a procurement department. Initially, it displays:
- Purchase order number
- Vendor name
- Material description
- Order quantity
- Net price
- Document date
The procurement manager uses the report for a few days, then requests that the supplier inform him of the delivery date and the number of items the supplier still has to deliver.
These fields are not included in the original report. The ABAP programmer has to review the current program and decide how to get the necessary information.
The request can be simple, but could contain references to other tables, other documents, calculations and selection criteria.
That is why it’s crucial to learn how to read and comprehend code.
What Should be checked by an ABAP Developer before Modifying a Program?
Changes without reading the original program may cause unnecessary issues. The developer should know the working of the existing report before developing it.
- Understand the Business Requirement
The developer should discuss the requirement with the functional consultant or business user. This helps clarify the expected changes.
For example, the team may need the original delivery date or the latest confirmed delivery date. Clear requirements help developers avoid mistakes during implementation
If you have clear answers, then you will not have misunderstandings during development.
- Analyze current ABAP code for duplication and other code smells
The developer needs to review the program structure, database selections, internal tables, processing logic, and output fields.
If the report includes other include or reusable routines, they should be reviewed, too.
- Identify the Relevant Data Sources
Some report fields require information from related SAP tables. Developers should understand how the data is stored and how different tables are connected.
For example, a purchasing report may use purchase order header, item, schedule-line, and goods receipt information..
- Assess the effect of the change
The developer should first determine if the program has other uses and if the proposed change will impact other program results before attempting to alter the program.
This review will minimise the likelihood of introducing new behaviour.
What can Developers do to Change an Existing ABAP Report?
After the requirement and existing logic is understood, the developer can plan the implementation.
For instance, the procurement team would like a new column that will display the quantity of items that are waiting to be delivered.
The developer can calculate the pending quantity using a
Pending Quantity = Ordered Quantity − Received Quantity
For example, if a company orders 100 units and receives 65 units, the pending quantity is 35 units.
But a true SAP report needs to take into account more than that simple calculation. The developer must check the goods receipt records carefully. They should also consider reversals, returns, and delivery completion indicators. These checks help ensure accurate report results.
The developer might have to:
- Extend the existing output structure.
- Collect necessary information for purchases and goods receipts.
- Reflect changes to data-processing logic.
- Include the new field in the report output.
- Look at and understand how partial and completed deliveries appear.
The ALV report might also need the developer to update the field catalogue and/or output configuration for the report.
The intent is to add desired functionality without changing the way the report works.
When SHOULD Developers Use Enhancements vs Modifying Standard SAP Programs?
All of the needs do not need to be met through a change to the existing SAP code.
In case the business needs functions that aren’t in the built-in system, then the developers may be able to add on the necessary enhancement methods.
Depending on the SAP application and requirement, options can include:
- User exits
- Customer exits
- Business Add-Ins (BAdIs)
- Enhancement spots
- Other supported extension mechanisms
An extra validation, for instance, might be needed before a purchase order is saved in a company. The Developer can provide the logic needed by adding a suitable enhancement point (if one exists).
How it’s done will vary depending on the SAP version, application design, enhancement options and project guidelines.
Students should be made aware that these techniques are used for specific purposes and to learn how to identify suitable enhancement points and not just because they are using these techniques.
Why is it that after the code change, testing/debugging is still important?
One program that is successful in one situation could be not successful in another business.
Once a modification has been done, it is important that the developer tests both the new requirement and the current functionality.
Some test cases that are helpful for the upcoming quantity report are:
- Purchase order without goods receipt.
- Purchase Order with partial goods receipt.
- Purchase order along with full delivery.
- The buyer issues a purchase order and the seller issues a GOODS RECEIPT REVERSAL.
- Multiple delivery records on a purchase order.
The developer is responsible for checking that the amount shown is in line with the business outcomes.
When you get an unexpected output from your ABAP program, you can use ABAP debugging. Breakpoints can be placed, internal table contents can be viewed, variable values can be examined and the flow of execution can be followed to determine where the wrong result occurs.
Testing is also necessary to ensure that the original report fields are displaying the correct data.
How a Code Change makes its way into Production?
Typical SAP development landscape involves changes created in the development system and then rolled to later systems.
One of the standard processes is:
- Business requirement is documented.
- The developer performs the necessary changes to the code.
- The changes are assigned to a transport request.
- The development team tests at the beginning of development.
- The functional or testing team checks the results.
- Changes authorized are sent to the quality system.
- Once approved, it is taken to production.
The steps involved will depend on the release management and transport processes in an organisation.
This process should enable students to understand the ABAP development process as part of a larger SAP project and not as a standalone process.
What to practice in the SAP ABAP training?
It is a good class activity to use an existing purchase report and add in a new business requirement.
Students have the opportunity to initially look at the original program, see the database logic and recognise the output structure. They can then add a delivery-related field, modify the processing logic, step through the resulting logic, and try various purchasing situations.
They can practise, as they go:
- Understanding and reading existing ABAP programs.
- Managing structures, internal tables and field symbols.
- Using Open SQL to retrieve relevant information.
- Knowing the relationships and joins between database tables.
- Modifying ALV reports.
- Debugging unexpected results.
- Working with enhancement techniques.
- Knowing how to process transport requests and perform tests.
These activities allow the learner to get comfortable with the kinds of activities that they might find in an SAP development environment.
Develop Practical ABAP Skills with Version IT
There is a need to be patient, logically sound and have a clear cut understanding of the business requirement when working on an existing program. Developers should understand the function of the existing code prior to deciding what changes they should make.
In students interested in learning SAP ABAP Training in Pune, learning report development, debugging, enhancements, database operations and testing can be beneficial.
Version IT provides training for SAP related learning of the students interested in enterprise application development. Students can ask questions about the existing ABAP syllabus, practical sessions of programming, experience of the trainer, and development exercises to work on.
It’s a great ability for anyone who is going to be an SAP ABAP developer to be able to understand an existing program and improve it safely.
