ABAP Select data from SAP table KKAOBJ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KKAOBJ table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to KKAOBJ. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the KKAOBJ table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_KKAOBJ TYPE STANDARD TABLE OF KKAOBJ,
      WA_KKAOBJ TYPE KKAOBJ,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <KKAOBJ> TYPE KKAOBJ.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KKAOBJ.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KKAOBJ
  INTO TABLE IT_KKAOBJ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKAOBJ
*  INTO TABLE @DATA(IT_KKAOBJ2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_KKAOBJ INDEX 1 INTO DATA(WA_KKAOBJ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KKAOBJ ASSIGNING <KKAOBJ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKAOBJ>-OBJNR = 1.
<KKAOBJ>-PLAN = 1.
<KKAOBJ>-IST = 1.
<KKAOBJ>-ABGR = 1.
<KKAOBJ>-CHECK = 1.

ENDLOOP.

LOOP AT IT_KKAOBJ INTO WA_KKAOBJ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKAOBJ-ABR, sy-vline,
  WA_KKAOBJ-BUKRS, sy-vline,
  WA_KKAOBJ-GSBER, sy-vline,
  WA_KKAOBJ-ABGSL, sy-vline,
  WA_KKAOBJ-ABOVE, sy-vline,
  WA_KKAOBJ-SGLFT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKAOBJ you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_KKAOBJ TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_KKAOBJ INTO WA_KKAOBJ.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KKAOBJ-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKAOBJ-PRCTR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KKAOBJ_STR, 
OBJNR TYPE STRING,
PLAN TYPE STRING,
IST TYPE STRING,
ABGR TYPE STRING,
CHECK TYPE STRING,
ABR TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
ABGSL TYPE STRING,
ABOVE TYPE STRING,
SGLFT TYPE STRING,
STABG TYPE STRING,
PLANEQIST TYPE STRING,
PRCTR TYPE STRING,
OBJNR_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKAOBJ_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_KKAOBJ_STR-OBJNR sy-vline 
WA_KKAOBJ_STR-PLAN sy-vline 
WA_KKAOBJ_STR-IST sy-vline 
WA_KKAOBJ_STR-ABGR sy-vline 
WA_KKAOBJ_STR-CHECK sy-vline 
WA_KKAOBJ_STR-ABR sy-vline 
WA_KKAOBJ_STR-BUKRS sy-vline 
WA_KKAOBJ_STR-GSBER sy-vline 
WA_KKAOBJ_STR-ABGSL sy-vline 
WA_KKAOBJ_STR-ABOVE sy-vline 
WA_KKAOBJ_STR-SGLFT sy-vline 
WA_KKAOBJ_STR-STABG sy-vline 
WA_KKAOBJ_STR-PLANEQIST sy-vline 
WA_KKAOBJ_STR-PRCTR sy-vline 
WA_KKAOBJ_STR-OBJNR_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.