Case Statement usage

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Case statements in ABAP are great. Not only do they let you handle your logic flow like other control flow statements but also provide a clean/ better readable way to branch into multiple sublogics.

A typical use of a case statement is something like this as [CASE variable: WHEN value]:

CASE lv_traffic_light.
WHEN 'GREEN'.
lv_message = 'Go Ahead'.
WHEN 'YELLOW'.
lv_message = 'Be Cautious'.
WHEN 'RED'.
lv_message = 'STOP!'.
ENDCASE.
view raw ABAP_CASE_Statement.abap hosted with ❤ by GitHub

However, they can also be used as [CASE values: WHEN variable] way.

Let's assume:

We have to validate and report if some variables have data or not.

One way to do it would be:

IF p_1 IS INITIAL.
MESSAGE 'no data in P1' TYPE 'E' .
ENDIF.
IF p_2 IS INITIAL.
MESSAGE 'no data in P2' TYPE 'E' .
ENDIF.
IF p_3 IS INITIAL.
MESSAGE 'no data in P3' TYPE 'E' .
ENDIF.
view raw initial_check_multi_var_IF.abap hosted with ❤ by GitHub
 

Another way to use Case statement:

CASE SPACE.
WHEN P_1.
MESSAGE 'no data in P1' TYPE 'E' .
WHEN P_2.
MESSAGE 'no data in P2' TYPE 'E' .
WHEN P_3.
MESSAGE 'no data in P3' TYPE 'E' .
ENDCASE.
view raw case_stmnt_initial_chk.abap hosted with ❤ by GitHub

I prefer this way as it increases readability and in my opinion cleaner.


 

  

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