Dr. Kerem Koseoglu

Tag: abap

  • ABAP Nested Loop Performance

    If you are not familiar with different internal table types, I recommend reading this post first. During an ABAP performance discussion, we decided to run tests to decide on the best method for nested loops. The example was to have an outer loop of BKPF and an inner loop of BSEG. Nesting two raw loops gives…

  • SAP PI or Not?

    There have been lots of discussions on using SAP PI or not. The same applies to my projects as well: Often enough, project management needs to make a decision on running integrations through PI. I want to share my highly subjective point of view regarding this matter. Using PI has its advantages, which you can find…

  • ABAP in Eclipse: Multi-Line SQL Queries on a Mac

    While using ABAP in Eclipse on a Mac, I have encountered an unfortunate issue: On the SQL console, the editor doesn’t allow me type multi-line queries. If I fit the entire query into a single line, everything is fine. If I break it down into multiple lines, Eclipse starts to display error messages. Here is how to…

  • İstanbul’da İş Bulmak

    Bir E-Mail’e attığım cevabı, başkalarına da faydası olabilir diye paylaşıyorum. İstanbul’da rekabet biraz yüksek; bilgisayar mühendisliği mezunu olmak parlak bir iş bulmak için garanti değil şu anda. Pek çok öğrenci, sektörde nereye odaklanmak istediğini aşağı yukarı belirliyor ve üniversite 3 -4. sınıf itibariyle yarı zamanlı bile olsa bu konuda bir yerlerde çalışmaya başlıyor. Mezun olduğunda,…

  • Abap Career Resources

    This post consolidates my resources on ABAP careers. Your potential questions are most probably answered in one of the following links: My blog has a dedicated section containing articles on this subject. Some significant articles are “Career in ABAP” (EN) for beginners and “Freelancing in ABAP” (TR) for freelancer candidates. My YouTube channel has a dedicated playlist containing…

  • ABAP Internal Table Indexing

    Hi ABAPeople! In this long promised article, I will talk about primary keys and indexes in internal tables. Nope, I’m not talking about database tables. Yes, I’m talking about “internal” tables. Yes, you heard it right: You can define primary keys and indexes for internal tables, just like database tables. Yes, this improves performance a…

  • ABAP Pointers

    According to Zevolving, work areas seem to have slightly better performance over pointers. Clients always want faster ABAP programs. And for a good reason too. If programs work faster, less time is wasted and the overall productivity would be increased – in theory at least. In practice, it might mean “More time to loaf on…

  • How to Work with Programmers

    Sharing the Same Room with a Programmer We need silence. Every time you speak loud next to a programmer, you may be planting a bug into his/her code. Every time you interrupt a concentrated programmer, you demolish a mental card castle which he/she must rebuild. If a programmer is wearing headphones, it means that either…

  • “Data Changed” on ALV Grid

    This entry will demonstrate a semi-pseudo code template on how to catch the “Data Changed” event on an editable non-OO ALV grid, and how to modify data further. This means, we are dealing with a grid generated by “REUSE_ALV_GRID_DISPLAY”, not “CL_GUI_ALV_GRID”. *&—————————— *& STEP 1: Preparation *&—————————— * Read data, create field catalog, etc.  …

  • “For All Entries” – Pitfalls, Limitations, Workarounds

    “For All Entries” is a useful ABAP command used in the following basic format: SELECT a b c FROM dbtab FOR ALL ENTRIES IN git_itab WHERE fld1 EQ git_itab-fld1 AND fld2 EQ git_itab-fld2. However, it has two pitfalls I have witnessed to be ignored by ABAP programmers occasionally. PITFALL 1: If git_itab is empty, the…