SY-TABIX value of a loop in other loop in other loop.

Question

Hello Gurus,
I have a problem i want to modify some columns in final internal table and it is possible by using Transporting and Index but when i see SY-TABIX value it is not really giving particular loop iteration value. Because my present loop is in another loop and it is in another loop. Please gurus help me out
or
How to Insert particular filed columns  and how to use where clause in insert..
Thanks.

Answer 1

Hi !
Here are things you could do:
1. You can use nested loops with the WHERE statement on the inner loop. But this can be slow.
     This will look like this
               loop at i_tab1 into wa1
               loop at i_tab2 into wa2 where cond1 = wa1-cond1....
                 (   move wa2-field3 to wa1-field3.....)
                    modify i_tab1.
               endloop.
               endloop.
2. You can use the parallel cursor technique as suggested above.
     This technique speeds up processing of data significantly. Here it is:
     data lv_tabix type i.
          sort i_tab1 by field1 ascending.
          sort i_tab2 by field1 ascending.
          loop at i_tab1 into wa1
          read table i_tab2 transporting no fields with key cond1 = wa1-cond1 binary search.
          lv_tabix = sy-tabix.
               loop at i_tab2 into wa2 from lv_tabix.
                    if wa2-cond1 <> wa1-cond1.
                               exit.       
                     endif.
               ( move wa2-field3 to wa1-field3.....)
                    modify i_tab1.
                endloop.
          endloop.
Please let me know if you want more explanation