Difference between CATCH system-exceptions and try catch endtry

[Former Member]

Hi ,

Can anyone of you tell me why try catch endtry is a preferred way than catch system-exceptions.

Regards,

Aruna

[Former Member]

This message was moderated.

[uwe_schieferstein]

Hello Aruna

One major disadvantage of CATCH SYSTEM-EXCEPTIONS is that exception can be captured only locally meaning just around the piece of coding which is framed by CATCH - ENDCATCH.

In contrast, using TRY - ENDTRY (i.e. class-based exceptions) you can propagate the exception through a chain of callers due to the fact that you either "THROW or CATCH" the exception.

Example: You may have hierarchy of caller where at the deepest level an exception may occurs but you want to handle this exception at the first hierarchy level

• CALL method_level_1

• CALL method_level_2

• CALL method_level_3

• CALL method_level_4 (exception can occur here)

Now you can do the following:

TRY.

• CALL method_level_1

• CALL method_level_2

• CALL method_level_3

• CALL method_level_4 (exception can occur here)

CATCH cx_sy_arithmetic_error INTO lo_error.  " lo_error is of TYPE REF TO <exception class>
ENDTRY.

If all four methods the exception class defined in their signature and method_level_4 does not catch the exception it will be propagated to the top calling program which facilitates exception handling.

This you cannot achieve using CATCH - ENDCATCH.

Regards

Uwe

[narin_nandivada3]

Hi,

Please check this thread

Hope this would help you.

Good luck

Narin