In the world of SAP development, 2026 has brought a high focus on what is called “clean core”. It means that writing the code that just works isn’t enough anymore. Your work needs to be easy for other people to read, change, and update without breaking the whole system. Well, most of the ABAP developers don’t write bad code. This happens gradually when the deadlines are over, shortcuts are taken, and before long, the codebase becomes something nobody wants to work with.
In this article, we will discuss in detail how to write clean ABAP by removing the common bad habits. For people who are interested in making a career in this field and learn how this works, taking the SAP ABAP Online Course can help in the same. Also, there are many of the habits that are worth paying attention to. So let’s begin discussing them in detail:
Common Bad Habits and Ways to Fix Them:
1. Pulling More Data Than You Need
Writing SELECT * is something almost every ABAP developer has done. It is quick and easy, but it forces the database to send back every column in a table even when the program only needs a couple of fields.
The fix:
Name only the fields your program actually uses in the SELECT statement. On large tables, this alone can make a noticeable difference in how fast your program runs. It is a small habit change with a real payoff.
2. Looping Inside a Loop
Matching data from two internal tables by running a loop inside another loop is one of the most common performance problems in ABAP. It works fine when the data is small, but it slows down badly as the volume increases.
The fix:
Sort your internal table first and use BINARY SEARCH when reading from it inside a loop. Hashed tables are another option for fast lookups. This is a topic that comes up repeatedly in any serious SAP ABAP Online Training program because it causes real problems in live systems.
3. Hardcoding Business Values
Putting company codes, plant values, or document types directly into the code is a habit that creates maintenance problems down the line. Every time a business value changes, someone has to go back into the code and update it manually.
The fix:
Use constants, selection screen parameters, or configuration tables for values that could change. If a value belongs to a business configuration, it should not be sitting inside program logic. This is something any SAP ABAP Training in Noida will cover early on because it affects how maintainable your programs are in the long run.
4. Not Checking for Errors
A lot of ABAP code calls function modules or BAPIs without ever checking whether they actually succeeded. The program finishes without throwing an error, but the data was never saved, and nobody finds out until something goes wrong downstream.
The fix:
Always check SY-SUBRC after database operations, function module calls, and method calls. Handle exceptions properly and give the user a clear message when something fails. Silent failures are far harder to investigate than ones that are logged and reported correctly.
5. Putting Everything in One Program
Writing the full solution, selection screen, data retrieval, processing, and output, inside a single report, is common, especially on smaller projects. As requirements grow, these programs become very hard to read and even harder to change without breaking something.
The fix:
Separate your code into logical sections. Use classes or function modules to keep data selection, business logic, and output handling apart from each other. This modular approach is now the standard in S/4HANA development. Having SAP ABAP Certification can help form a clean structure.
6. Using Poor Variable Names
Short or vague variable names save time when writing but cost much more time later when reading. Code that uses names like x, tamp, or lv1 is difficult to follow, especially when someone else has to work with it.
The fix:
Use descriptive names that tell you what the variable holds. Following SAP’s standard naming convention, lv_ for local variables, lt for local tables, and ls_ for local structures keeps things consistent and readable across your codebase.
7. Skipping Tests and Reviews
Manual testing in a development system and then moving straight to production is how most ABAP changes are handled. No unit tests, no code review, no documentation. It works until something breaks, and nobody can trace why.
The fix:
Write ABAP Unit tests for important logic, even basic ones. Have a colleague review your code before it moves forward? A quick review catches issues that the original developer misses simply because they are too close to the code.
Conclusion:
From the above discussion, it can be said that clean ABAP is not complicated. This needs to be consistent and selecting what you need, structuring the code properly as well as handling the errors and writing in a way that someone else can follow without having any need to ask the questions. People who are looking to make their career should apply for a relevant course that offers a strong starting point. Doing a great coding practice will help understand what the modern SAP Projects demand of.
