ON CHANGE OF 的使用方法

DATA T100_WA TYPE T100.
SELECT * FROM T100
INTO T100_WA
WHERE SPRSL = SY-LANGU AND
MSGNR < '010'
ORDER BY PRIMARY KEY.
ON CHANGE OF T100_WA-ARBGB.
ULINE.
WRITE: / '***', T100_WA-ARBGB, '***'.
ENDON.
WRITE: / T100_WA-MSGNR, T100_WA-TEXT.
ENDSELECT.

其实on change of 是一种控制，类似的还有 at end of ,at new等。