ABAP Select data from SAP table OBJLIST_PS_KKAG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OBJLIST_PS_KKAG 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 OBJLIST_PS_KKAG. 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 OBJLIST_PS_KKAG 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_OBJLIST_PS_KKAG TYPE STANDARD TABLE OF OBJLIST_PS_KKAG,
      WA_OBJLIST_PS_KKAG TYPE OBJLIST_PS_KKAG,
      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: <OBJLIST_PS_KKAG> TYPE OBJLIST_PS_KKAG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OBJLIST_PS_KKAG
*  INTO TABLE @DATA(IT_OBJLIST_PS_KKAG2).
*--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_OBJLIST_PS_KKAG INDEX 1 INTO DATA(WA_OBJLIST_PS_KKAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OBJLIST_PS_KKAG>-OBJNR = 1.
<OBJLIST_PS_KKAG>-KOKRS = 1.
<OBJLIST_PS_KKAG>-WAERS = 1.
<OBJLIST_PS_KKAG>-TRGKZ = 1.
<OBJLIST_PS_KKAG>-PERII = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OBJLIST_PS_KKAG-AUTYP, sy-vline,
  WA_OBJLIST_PS_KKAG-AUART, sy-vline,
  WA_OBJLIST_PS_KKAG-BUKRS, sy-vline,
  WA_OBJLIST_PS_KKAG-ZSCHM, sy-vline,
  WA_OBJLIST_PS_KKAG-GSBER, sy-vline,
  WA_OBJLIST_PS_KKAG-SCOPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OBJLIST_PS_KKAG 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_OBJLIST_PS_KKAG 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_OBJLIST_PS_KKAG INTO WA_OBJLIST_PS_KKAG.


*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 SCOPE, internal->external for field SCOPE
CALL FUNCTION 'CONVERSION_EXIT_SCOPE_OUTPUT'
  EXPORTING
    input =                      WA_OBJLIST_PS_KKAG-SCOPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJLIST_PS_KKAG-SCOPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_OBJLIST_PS_KKAG-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJLIST_PS_KKAG-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OBJLIST_PS_KKAG-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJLIST_PS_KKAG-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_OBJLIST_PS_KKAG_STR, 
OBJNR TYPE STRING,
KOKRS TYPE STRING,
WAERS TYPE STRING,
TRGKZ TYPE STRING,
PERII TYPE STRING,
AUTYP TYPE STRING,
AUART TYPE STRING,
BUKRS TYPE STRING,
ZSCHM TYPE STRING,
GSBER TYPE STRING,
SCOPE TYPE STRING,
SUBPR TYPE STRING,
ABGSL TYPE STRING,
FAKKZ TYPE STRING,
PSPNR TYPE STRING,
ABOVE TYPE STRING,
KZBWS TYPE STRING,
PRCTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OBJLIST_PS_KKAG_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_OBJLIST_PS_KKAG_STR-OBJNR sy-vline 
WA_OBJLIST_PS_KKAG_STR-KOKRS sy-vline 
WA_OBJLIST_PS_KKAG_STR-WAERS sy-vline 
WA_OBJLIST_PS_KKAG_STR-TRGKZ sy-vline 
WA_OBJLIST_PS_KKAG_STR-PERII sy-vline 
WA_OBJLIST_PS_KKAG_STR-AUTYP sy-vline 
WA_OBJLIST_PS_KKAG_STR-AUART sy-vline 
WA_OBJLIST_PS_KKAG_STR-BUKRS sy-vline 
WA_OBJLIST_PS_KKAG_STR-ZSCHM sy-vline 
WA_OBJLIST_PS_KKAG_STR-GSBER sy-vline 
WA_OBJLIST_PS_KKAG_STR-SCOPE sy-vline 
WA_OBJLIST_PS_KKAG_STR-SUBPR sy-vline 
WA_OBJLIST_PS_KKAG_STR-ABGSL sy-vline 
WA_OBJLIST_PS_KKAG_STR-FAKKZ sy-vline 
WA_OBJLIST_PS_KKAG_STR-PSPNR sy-vline 
WA_OBJLIST_PS_KKAG_STR-ABOVE sy-vline 
WA_OBJLIST_PS_KKAG_STR-KZBWS sy-vline 
WA_OBJLIST_PS_KKAG_STR-PRCTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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