Create Dynamic Structure at Runtime via ALV-Methods!

Question

Hi Experts,
i try to create at the ABAP Runtime a new Structure.
FOR EXAMPLE: I have a internal Table "database" and i dont know their Structure or Typ.
MY Question: How can i get the structuretype for this internal Table "database" ??
                                I thought that it is possible with ALV-Methods, but i dont find the right way.
First Step:       I must get the structure of this internal Table.
Second Step: I must create a workarea/ line of this internal Table, that i can work row for row with the table.
Have someone an code example for me, because iám very confused about this Problem.
With kind regards.
Ersin Tosun

Answer 1

Hello,
For this specific requirement, SAP has provided RTTI class.
Below is a code snippet for your ready reference. In this example we're trying to get the structure of the dynamic table <ITAB> whose structure is not defined till run-time.
TYPE-POOLS: abap.
PARAMETERS: p_table TYPE tabname.
DATA: dref TYPE REF TO data.
FIELD-SYMBOLS <itab> TYPE STANDARD TABLE.
CREATE DATA dref TYPE STANDARD TABLE OF (p_table).
ASSIGN dref->* TO <itab>.
DATA: go_tab_descr TYPE REF TO cl_abap_tabledescr,
      go_struc_descr TYPE REF TO cl_abap_structdescr,
      wa_comp TYPE abap_compdescr.
go_tab_descr ?= cl_abap_tabledescr=>describe_by_data( <itab> ).
CHECK sy-subrc = 0.
go_struc_descr ?= go_tab_descr->get_table_line_type( ).
LOOP AT go_struc_descr->components INTO wa_comp.
  WRITE: / wa_comp-name.
ENDLOOP.
I must create a workarea/ line of this internal Table, that i can work row for row with the table.
Sorry i missed the Step 2:
FIELD-SYMBOLS: <itab> TYPE STANDARD TABLE,
               <wa> TYPE ANY,
               <val> TYPE ANY.
LOOP AT <itab> ASSIGNING <wa>.
  LOOP AT go_struc_descr->components INTO wa_comp.
*   To access the components of the structure dynamically
    ASSIGN COMPONENT wa_comp-name OF STRUCTURE <wa> TO <val>.
  ENDLOOP.
ENDLOOP.
BR,
Suhas
Edited by: Suhas Saha on Nov 18, 2010 7:26 PM