In the previous article of this tutorial, the author introduced a useful tool for checking program runtime errors in the ABAP system: transaction code ST22:
In the actual work process of the author, I found that some developers do not understand the difference between the concepts of runtime error (Runtime Error) and exception (Exception) very clearly, so I use this article to specifically introduce ABAP exception handling. Concept and practice.
We first find out the official SAP ABAP help document for exception handling.
Simply create a new ABAP report in the SE38 transaction code, select an ABAP keyword with the mouse, and click F1 to summon the ABAP help document embedded in SAPGUI.
In the pop-up dialog box, we ABAP - Reference->Program Flow Logic->Exception Handlingcan select in turn. Exception handling involves changes to the program execution flow, so it is placed under the Program Flow Logic chapter, as shown in the following figure:
Judging from the subtitle of Exception Handling in the above figure, we can find that ABAP exceptions are divided into the following two categories:
- Non-Class-Based Exceptions - Exceptions implemented based on non-ABAP classes
- Class-Based Exception - Exception based on ABAP class implementation
Below is a detailed introduction to these concepts .