Master Data table update with Abap

[amine_lamkaissi]

Hi experts,

I have a master data table as follwing (simplified version)

Field1	Field2	Field3
A	B	Y
A	B	Y
A	E	Z
A	E	Z
A	E	Z
A	M	V

I need to update field3 of the master data as following:

-The same combination of field1 and Field2 need to have the field3 filled only one time, so what I expect at the end of treatment  is the following:

Field1	Field2	Field3
A	B	Y
A	B
A	E	Z
A	E
A	E
A	M	V

To do so, I thought about creating a program with the following logic:

Sort itable by Field1 Field2.

Loop at itable into wa.

Concatenate wa-field1 wa-field2 into var1

If wa-field3 is not initial.

Concatenate wa-field1 wa-field2 into var2.

            Endif.

              If var1 ne var2.

              Clear wa-field3.

             Endif.

Endloop.

What do you think? Are they any simple ways to do it.

Thanks for your support.

Amine

[jan_dahl]

This is a perfect case to use 'at' in loops.

loop table1 into wa.
  at new field2.
    CONTINUE.
  endat.

  wa-field3 = space.
  MODIFY table1 from wa.
ENDLOOP.

[Former Member]

Hi Amine.

May be you can use field-symbols:

SORT itable BY field1 field2.

LOOP AT itable ASSIGNING <wa>.

   CONCATENATE <wa>-field1 <wa>-field2

   INTO var1.

   IF var1 EQ var2. "Only if the current record is the same as above, field3 is cleared

     <wa>-field3 = ''.

   ENDIF.

   MOVE var1 TO var2.

ENDLOOP.

[jan_dahl]

Yes, using field symbols makes it even more easy. I realy shuld use them more often. Thanks Renzo.

I checked my coding and changed it:

SORT itable BY field1 field2.
LOOP AT itable ASSIGNING <wa>.
  AT NEW field2.
    CONTINUE. " Skip first accurence of new field2
  ENDAT.
  <wa>-field3 = space.
ENDLOOP.

Result:

[amine_lamkaissi]

Thanks a lot guys.

Amine