topic Re: Read internal table in reverse order in Application Development and Automation Discussions

Read internal table in reverse order

Former Member — Tue, 28 Oct 2008 22:04:53 GMT

Hi,

I have got a problem. This may be very simple for you guys but just wanted to know how do I read internal table in reverse order.

eg. Internal table holds values 05,01,03 then I want to read them as 03,01,05.

Regards,

Murtuza Kharodawala

Re: Read internal table in reverse order

Former Member — Tue, 28 Oct 2008 22:24:20 GMT

Like this?

REPORT ztest LINE-SIZE 80 MESSAGE-ID 00.

DATA: BEGIN OF itab OCCURS 0,
        f1(02),
      END   OF itab.

DATA no_lines TYPE sy-tabix.

MOVE: '05' TO itab-f1.
APPEND itab.
MOVE: '01' TO itab-f1.
APPEND itab.
MOVE: '03' TO itab-f1.
APPEND itab.

DESCRIBE TABLE itab LINES no_lines.

DO.
  READ TABLE itab INDEX no_lines.
  WRITE: /001 itab-f1.
  no_lines = no_lines - 1.
  IF no_lines < 1.
    EXIT.
  ENDIF.
ENDDO.

Rob

Re: Read internal table in reverse order

Former Member — Tue, 28 Oct 2008 22:24:34 GMT

Read rows in reverse order? or columns in reverse?

find the total # of records in the table using describe

then use

read table itab index id1

id1 = id1 - 1.

if id1 = 0. exit. endif.

end do

Re: Read internal table in reverse order

Former Member — Tue, 28 Oct 2008 22:34:02 GMT

Hi,

Consider the following code:

Data: v_cntr  type i.
   Data: v_lines type i.

 *  use describe to get the number of records in internal table
    Describe table itab lines v_lines.

    v_cntr  = v_lines.
    do v_lines times.
    
       check v_cntr > 0. "not really needed
       read table itab into wa index v_cntr.
*      do the further operation here with wa...
*      you must not delete any record from itab here.If you do, this code gives a dump       
       v_cntr = v_cntr - 1.

    enddo.

Regards,

Prasad.

Re: Read internal table in reverse order

Former Member — Tue, 28 Oct 2008 22:35:50 GMT

was your code different than the above 2?