copying fields froma dynamic table

[Former Member]

i have a dyanmic table say t1. now i have craeted another dynamic table say t2 with some fields in common with table t1. i won't be knowing which fields are in common. the common fields will be stord in another table t3. now i need to copy the common fields from t1 to t2 after reading them from t3. how do i go about it???

[matt]

In the latest versions of ABAP, use MOVE-CORRESPONDING.

matt

[Former Member]

TYPES:
  BEGIN OF s_t3.
    INCLUDE TYPE A.
    INCLUDE TYPE B.
TYPES:
  END OF s_t3.

DATA:
  t1                TYPE TABLE OF A,
  t2                TYPE TABLE OF B,
  ls_t3            TYPE s_t3,
  t3                TYPE TABLE OF s_t3.

FIELD-SYMBOLS:
  <fs_t1>        TYPE A,
  <fs_t2>        TYPE B.

LOOP AT t1 ASSIGNING <fs_t1>.
  READ TABLE t2 ASSIGNING <fs_t2>
    WITH KEY
      [key_t2] = [key_t1].
  CHECK sy-subrc IS INITIAL.

  MOVE-CORRESPONDING <fs_t1> TO <ls_t3>.
  MOVE-CORRESPONDING <fs_t2> TO <ls_t3>.
  APPEND ls_t3 TO t3.
ENDLOOP.

[Former Member]

Hm, ok, that doesn't work. You cannot include the same structure fields twice...

[Former Member]

OK, first you have to find out what are the common fields of A and B.

You can use FM 'DDIF_NAMETAB_GET' to read the structure fields.

Then you have to create a dynamic type with the common fields of A and B and assign the values as described above in my first answer.

It's quite tricky...

[Former Member]

Oh, I think for your requirement you don't need t3 at all.

This should be the solution:

FIELD-SYMBOLS:
  <fs_t1>        TYPE A,
  <fs_t2>        TYPE B.
 
LOOP AT t1 ASSIGNING <fs_t1>.
  READ TABLE t2 ASSIGNING <fs_t2>
    WITH KEY
      [key_t2] = [key_t1].
  CHECK sy-subrc IS INITIAL.
 
  MOVE-CORRESPONDING <fs_t1> TO <fs_t2>.
ENDLOOP.

But in this case you have to know what is the key field for t1 and t2.