ABAP Select data from SAP table KKROBJSTAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKROBJSTAM
*  INTO TABLE @DATA(IT_KKROBJSTAM2).
*--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_KKROBJSTAM INDEX 1 INTO DATA(WA_KKROBJSTAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKROBJSTAM>-OBJNR = 1.
<KKROBJSTAM>-KOKRS = 1.
<KKROBJSTAM>-WERKS = 1.
<KKROBJSTAM>-BUKRS = 1.
<KKROBJSTAM>-PROGR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKROBJSTAM-MATNR, sy-vline,
  WA_KKROBJSTAM-VERID, sy-vline,
  WA_KKROBJSTAM-PROCNR, sy-vline,
  WA_KKROBJSTAM-AUART, sy-vline,
  WA_KKROBJSTAM-AUFNR, sy-vline,
  WA_KKROBJSTAM-POSNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKROBJSTAM 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_KKROBJSTAM 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_KKROBJSTAM INTO WA_KKROBJSTAM.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KKROBJSTAM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKROBJSTAM-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KKROBJSTAM-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKROBJSTAM-KOSTL.
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_KKROBJSTAM_STR, 
OBJNR TYPE STRING,
KOKRS TYPE STRING,
WERKS TYPE STRING,
BUKRS TYPE STRING,
PROGR TYPE STRING,
MATNR TYPE STRING,
VERID TYPE STRING,
PROCNR TYPE STRING,
AUART TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
KSTRG TYPE STRING,
SAFNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KOSTL TYPE STRING,
ARBPL TYPE STRING,
WERKA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKROBJSTAM_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_KKROBJSTAM_STR-OBJNR sy-vline 
WA_KKROBJSTAM_STR-KOKRS sy-vline 
WA_KKROBJSTAM_STR-WERKS sy-vline 
WA_KKROBJSTAM_STR-BUKRS sy-vline 
WA_KKROBJSTAM_STR-PROGR sy-vline 
WA_KKROBJSTAM_STR-MATNR sy-vline 
WA_KKROBJSTAM_STR-VERID sy-vline 
WA_KKROBJSTAM_STR-PROCNR sy-vline 
WA_KKROBJSTAM_STR-AUART sy-vline 
WA_KKROBJSTAM_STR-AUFNR sy-vline 
WA_KKROBJSTAM_STR-POSNR sy-vline 
WA_KKROBJSTAM_STR-KSTRG sy-vline 
WA_KKROBJSTAM_STR-SAFNR sy-vline 
WA_KKROBJSTAM_STR-KDAUF sy-vline 
WA_KKROBJSTAM_STR-KDPOS sy-vline 
WA_KKROBJSTAM_STR-KOSTL sy-vline 
WA_KKROBJSTAM_STR-ARBPL sy-vline 
WA_KKROBJSTAM_STR-WERKA sy-vline      INTO ld_text SEPARATED BY SPACE.

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