REPORT z_dong_standard_list .

DATA: BEGIN OF LINE,
         COL1 TYPE C,
         COL4 TYPE C,
         COL2 TYPE I,
         COL3 TYPE I,
      END OF LINE.
DATA ITAB LIKE LINE OCCURS 10.
LINE-COL1 = 'A'.
LINE-COL4 = 'A'.
DO 3 TIMES.
   LINE-COL2 = SY-INDEX.
   LINE-COL3 = SY-INDEX ** 2.
   APPEND LINE TO ITAB.
ENDDO.
LINE-COL1 = 'B'.
LINE-COL4 = 'B'.
DO 3 TIMES.
   LINE-COL2 = 2 * SY-INDEX.
   LINE-COL3 = ( 2 * SY-INDEX ) ** 2.
   APPEND LINE TO ITAB.
ENDDO.
LINE-COL1 = 'A'.
LINE-COL4 = 'B'.
DO 3 TIMES.
   LINE-COL2 = SY-INDEX.
   LINE-COL3 = SY-INDEX ** 2.
   APPEND LINE TO ITAB.
ENDDO.
* SORT ITAB BY COL4 ASCENDING.
LOOP AT ITAB INTO LINE.
WRITE: / LINE-COL1, LINE-COL2, LINE-COL3,LINE-COL4.
*  AT NEW COL4.
**      SUM.
*      ULINE.
*      write : sy-tabix.
*      WRITE: / LINE-COL1, LINE-COL2, LINE-COL3,LINE-COL4.
*      SKIP.
*   ENDAT.
*   AT END OF COL4.
**      SUM.
*      ULINE.
*      write : sy-tabix.
*      WRITE: / LINE-COL1, LINE-COL2, LINE-COL3,LINE-COL4.
*      SKIP.
*   ENDAT.
*   AT FIRST.
**      SUM.
*      ULINE.
*      write : sy-tabix.
*      WRITE: / LINE-COL1, LINE-COL2, LINE-COL3,LINE-COL4.
*   ENDAT.
*      AT last.
**      SUM.
*      ULINE.
*      write : sy-tabix.
*      WRITE: / LINE-COL1, LINE-COL2, LINE-COL3,LINE-COL4.
*   ENDAT.
ENDLOOP.
DATA : LINE1 LIKE LINE,
       ITAB1 LIKE TABLE OF LINE,
       z_index type i.
*clear line.
*clear line1.
*clear itab1.
*clear z_index.
*sort itab by col1 ASCENDING col4 ASCENDING.
*LOOP AT ITAB INTO LINE.
*
*if sy-tabix = 1.
*  line1 = line.
*  append line1 to itab1.
*  z_index = z_index + 1.
*  CONTINUE.
*  endif.
*
*  if line1-col1 = line-col1
*  and line1-col4 = line-col4.
*  if line1-col2 > line-col2.
*    line1-col2 = line-col2.
*   endif.
*  if line1-col3 < line-col3.
*    line1-col3 = line-col3.
*   endif.
*   MODIFY itab1 from line1 INDEX z_index TRANSPORTING col2 col3.
*   else.
*    line1 = line.
*    append line to itab1.
*   z_index = z_index + 1.
*   endif.
*
*   clear line.
*
*ENDLOOP.
*

*DATA : DD1 TYPE I,
*       DD2 TYPE I,
*       NAME1 TYPE C,
*       NAME2 TYPE C.
*sort itab by col1 ASCENDING col4 ASCENDING.
*
*clear z_index.
*loop at itab into LINE.
*     NAME1 = LINE-COL1.
*     NAME2 = LINE-COL4.
*     DD1 = LINE-COL2.
*     DD2 = LINE-COL3.
*   at new col4.
*    line1-col2 = DD1.
*    line1-col3 = DD2.
*   endat.
*
*     if line1-col2 >= LINE-COL2.
*     line1-col2 = LINE-COL2.
*     endif.
*     if line1-col3 =< LINE-COL3.
*     line1-col3 = line-COL3.
*     endif.
*
*   at end of col4.
*     line1-col1 = NAME1.
*     line1-col4 = NAME2.
*     line1-col2 = line1-col2 .
*     line1-col3 = line1-col3.
*     append line1 to itab1.
*   endat.
*     clear LINE.
*  endloop.
*  loop at ITAB1 into line1.
*  WRITE : / line1-COL1,line1-COL4,line1-COL2,line1-COL3.
*  endloop.