Parallel Cursor technique

Parallel Cursor is a technique to increase the performance of the program when there are nested loops.

For example:- 

if the code contains this type of logic:-

  LOOP AT ITAB INTO WA.
    LOOP AT ITAB1 INTO WA1.
    ENDLOOP.
  ENDLOOP.

In the above logic, for one record of the itab, again the table itab1 loops many times. If itab contains

many records and also at the same time if itab1 contains double the records, then this would result into performance issue. you can modify it as:-

  LOOP AT ITAB INTO WA.
    READ TABLE ITAB1 INTO WA1 WITH KEY FIELD1 = WA-FIELD1.
    V_TABIX = SY-TABIX.
    IF SY-SUBRC EQ 0.
      LOOP AT ITAB1 INTO WA1 FROM V_TABIX.   "It will loop from that index
      ENDLOOP.
    ENDIF.
  ENDLOOP.