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Watch points
Like a breakpoint, a watchpoint is an indicator in a program that tells the ABAP runtime processor to interrupt the program at a particular point. Unlike breakpoints, however, watchpoints are not activated until the contents of a specified field change. Watchpoints, like dynamic breakpoints, are user-specific, and so do not affect other users running the same program. You can only define watchpoints in the Debugger.
Use
You set watchpoints in the Debugger to monitor the contents of specific fields. They inform you when the value of a field changes. When the value changes, the Debugger interrupts the program.
Features
You can set up to five watchpoints in a program.
See also Setting Watchpoints.
You can also specify the conditions on which a watchpoint is to become active.
You can specify logical conditions between up to five conditional watchpoints.
See Specifying a Logical Expression.
You can define watchpoints as either local or global. If you define a global watchpoint, it is active in all called programs. Local watchpoints are only active in the specified program.
You can change and delete watchpoints.
See Changing Watchpoints.
You can use watchpoints to display changes to the references of strings, data and object references, and internal tables.
See Memory Monitoring with Watchpoints
If you want to interrupt a program when the contents of a field or structure change, use a watchpoint. You can set up to five watchpoints, including watchpoints for strings.
A watchpoint can be either local or global. Local watchpoints are only valid in the specified program. Global watchpoints are valid in the specified program, and also in all the other programs it calls.
Procedure
To set a watchpoint, start the Debugger and proceed as follows:
Choose Breakpoint ® Create watchpoint or the corresponding pushbutton. The Create Watchpoint dialog box appears:
Break Points
Apart from direct execution of an ABAP program in the Debugger, it is also possible to start the Debugger call by the exact setting of a breakpoint. This is achieved by setting one or more of these breakpoints in the program. A breakpoint is a signal at a particular point in the program that tells the ABAP runtime processor to interrupt processing and start the Debugger. The program runs normally until the breakpoint is reached.
There is also a special kind of breakpoint called a watchpoint. When you use watchpoints, the Debugger is not activated until the contents of a particular field change. For further information, refer to Watchpoints.
Breakpoint Variants
The Debugger contains different breakpoint variants:
Static
The BREAK-POINT statement in an ABAP program. Static breakpoints are not normally user-specific. However, you can make them user-specific.
Directly-set
dynamic breakpoints
Can be set in the ABAP Editor or the Debugger. Dynamic breakpoints are always user-specific, and are deleted when you log off from the R/3 System.
Breakpoints
at statement
The Debugger stops the program directly before the specified statement is executed.
Breakpoints
at subroutine
The Debugger stops the program directly before the specified subroutine is called.
Breakpoint at function module
The Debugger stops the program directly before the specified function module is called.
Breakpoint at method
The Debugger stops the program directly before the specified method is called.
Breakpoints at system exceptions
The Debugger stops the program directly after a system exception, that is, after a runtime error has been intercepted.
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