ABAP Select data from SAP table J_3RKKRS_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RKKRS_ALV 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 J_3RKKRS_ALV. 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 J_3RKKRS_ALV 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_J_3RKKRS_ALV TYPE STANDARD TABLE OF J_3RKKRS_ALV,
      WA_J_3RKKRS_ALV TYPE J_3RKKRS_ALV,
      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: <J_3RKKRS_ALV> TYPE J_3RKKRS_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RKKRS_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RKKRS_ALV
  INTO TABLE IT_J_3RKKRS_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RKKRS_ALV
*  INTO TABLE @DATA(IT_J_3RKKRS_ALV2).
*--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_J_3RKKRS_ALV INDEX 1 INTO DATA(WA_J_3RKKRS_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RKKRS_ALV ASSIGNING <J_3RKKRS_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RKKRS_ALV>-BUKRS = 1.
<J_3RKKRS_ALV>-BELNR = 1.
<J_3RKKRS_ALV>-GJAHR = 1.
<J_3RKKRS_ALV>-BLART = 1.
<J_3RKKRS_ALV>-DEBET = 1.

ENDLOOP.

LOOP AT IT_J_3RKKRS_ALV INTO WA_J_3RKKRS_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RKKRS_ALV-GSBERD, sy-vline,
  WA_J_3RKKRS_ALV-KREDIT, sy-vline,
  WA_J_3RKKRS_ALV-GSBERK, sy-vline,
  WA_J_3RKKRS_ALV-DLIFNR, sy-vline,
  WA_J_3RKKRS_ALV-DKUNNR, sy-vline,
  WA_J_3RKKRS_ALV-KLIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RKKRS_ALV 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_J_3RKKRS_ALV 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_J_3RKKRS_ALV INTO WA_J_3RKKRS_ALV.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEBET
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-DEBET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-DEBET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KREDIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-KREDIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-KREDIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DLIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-DLIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-DLIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-DKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-DKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KLIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-KLIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-KLIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-KKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-KKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBE2
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-DMBE2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-DMBE2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBE3
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKKRS_ALV-DMBE3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKKRS_ALV-DMBE3.
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_J_3RKKRS_ALV_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
DEBET TYPE STRING,
GSBERD TYPE STRING,
KREDIT TYPE STRING,
GSBERK TYPE STRING,
DLIFNR TYPE STRING,
DKUNNR TYPE STRING,
KLIFNR TYPE STRING,
KKUNNR TYPE STRING,
BUZEID TYPE STRING,
BUZEIK TYPE STRING,
DMBTR TYPE STRING,
HWAER TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
ADDD TYPE STRING,
ADDK TYPE STRING,
NPDDI TYPE STRING,
NPDKI TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
XBLNR TYPE STRING,
KOARTD TYPE STRING,
XNEGPD TYPE STRING,
KOARTK TYPE STRING,
XNEGPK TYPE STRING,
DMBE2 TYPE STRING,
HWAE2 TYPE STRING,
DMBE3 TYPE STRING,
HWAE3 TYPE STRING,
ITYPE TYPE STRING,
USNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
CODEPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RKKRS_ALV_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_J_3RKKRS_ALV_STR-BUKRS sy-vline 
WA_J_3RKKRS_ALV_STR-BELNR sy-vline 
WA_J_3RKKRS_ALV_STR-GJAHR sy-vline 
WA_J_3RKKRS_ALV_STR-BLART sy-vline 
WA_J_3RKKRS_ALV_STR-DEBET sy-vline 
WA_J_3RKKRS_ALV_STR-GSBERD sy-vline 
WA_J_3RKKRS_ALV_STR-KREDIT sy-vline 
WA_J_3RKKRS_ALV_STR-GSBERK sy-vline 
WA_J_3RKKRS_ALV_STR-DLIFNR sy-vline 
WA_J_3RKKRS_ALV_STR-DKUNNR sy-vline 
WA_J_3RKKRS_ALV_STR-KLIFNR sy-vline 
WA_J_3RKKRS_ALV_STR-KKUNNR sy-vline 
WA_J_3RKKRS_ALV_STR-BUZEID sy-vline 
WA_J_3RKKRS_ALV_STR-BUZEIK sy-vline 
WA_J_3RKKRS_ALV_STR-DMBTR sy-vline 
WA_J_3RKKRS_ALV_STR-HWAER sy-vline 
WA_J_3RKKRS_ALV_STR-WRBTR sy-vline 
WA_J_3RKKRS_ALV_STR-WAERS sy-vline 
WA_J_3RKKRS_ALV_STR-ADDD sy-vline 
WA_J_3RKKRS_ALV_STR-ADDK sy-vline 
WA_J_3RKKRS_ALV_STR-NPDDI sy-vline 
WA_J_3RKKRS_ALV_STR-NPDKI sy-vline 
WA_J_3RKKRS_ALV_STR-BUDAT sy-vline 
WA_J_3RKKRS_ALV_STR-MONAT sy-vline 
WA_J_3RKKRS_ALV_STR-XBLNR sy-vline 
WA_J_3RKKRS_ALV_STR-KOARTD sy-vline 
WA_J_3RKKRS_ALV_STR-XNEGPD sy-vline 
WA_J_3RKKRS_ALV_STR-KOARTK sy-vline 
WA_J_3RKKRS_ALV_STR-XNEGPK sy-vline 
WA_J_3RKKRS_ALV_STR-DMBE2 sy-vline 
WA_J_3RKKRS_ALV_STR-HWAE2 sy-vline 
WA_J_3RKKRS_ALV_STR-DMBE3 sy-vline 
WA_J_3RKKRS_ALV_STR-HWAE3 sy-vline 
WA_J_3RKKRS_ALV_STR-ITYPE sy-vline 
WA_J_3RKKRS_ALV_STR-USNAM sy-vline 
WA_J_3RKKRS_ALV_STR-CPUDT sy-vline 
WA_J_3RKKRS_ALV_STR-CPUTM sy-vline 
WA_J_3RKKRS_ALV_STR-CODEPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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