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CHECK_99 - Minimum number of WHENs in a CASE

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A CASE statement should have a minimum number of WHEN branches. If there is only one branch, it would be better to use an IF statement.

FORM foo.
  DATA lv_bar TYPE i.
  CASE lv_bar.
    WHEN 1.
      WRITE: / 'hello world'.
  ENDCASE.
ENDFORM.

can be replaced by

FORM foo.
  DATA lv_bar TYPE i.
  IF lv_bar = 1.
    WRITE: / 'hello world'.
  ENDIF.
ENDFORM.

Empty WHEN branches don’t count.

Configuration

The minium number of WHEN branches is by default 2, but can be configured:

Configuration