ABAP Select data from SAP table RJK0601 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJK0601 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 RJK0601. 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 RJK0601 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_RJK0601 TYPE STANDARD TABLE OF RJK0601,
      WA_RJK0601 TYPE RJK0601,
      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: <RJK0601> TYPE RJK0601.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJK0601.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJK0601
  INTO TABLE IT_RJK0601.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJK0601
*  INTO TABLE @DATA(IT_RJK06012).
*--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_RJK0601 INDEX 1 INTO DATA(WA_RJK06012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJK0601 ASSIGNING <RJK0601>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJK0601>-GUELTIGVON = 1.
<RJK0601>-GUELTIGBIS = 1.
<RJK0601>-PVA = 1.
<RJK0601>-BEZUGSTYP = 1.
<RJK0601>-LIEFERART = 1.

ENDLOOP.

LOOP AT IT_RJK0601 INTO WA_RJK0601.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJK0601-ETMENGE, sy-vline,
  WA_RJK0601-STORNOGRD, sy-vline,
  WA_RJK0601-KUENDGRD, sy-vline,
  WA_RJK0601-KUENDEING, sy-vline,
  WA_RJK0601-LIEFENDEG, sy-vline,
  WA_RJK0601-LIEFENDEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJK0601 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_RJK0601 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_RJK0601 INTO WA_RJK0601.


*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 PVA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJK0601-PVA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJK0601-PVA.
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_RJK0601_STR, 
GUELTIGVON TYPE STRING,
GUELTIGBIS TYPE STRING,
PVA TYPE STRING,
BEZUGSTYP TYPE STRING,
LIEFERART TYPE STRING,
ETMENGE TYPE STRING,
STORNOGRD TYPE STRING,
KUENDGRD TYPE STRING,
KUENDEING TYPE STRING,
LIEFENDEG TYPE STRING,
LIEFENDEI TYPE STRING,
XKUEND_AKT TYPE STRING,
PROVRART TYPE STRING,
RECHENDE TYPE STRING,
WBZSATZART TYPE STRING,
WBZVORGART TYPE STRING,
WBZTERMIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJK0601_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_RJK0601_STR-GUELTIGVON sy-vline 
WA_RJK0601_STR-GUELTIGBIS sy-vline 
WA_RJK0601_STR-PVA sy-vline 
WA_RJK0601_STR-BEZUGSTYP sy-vline 
WA_RJK0601_STR-LIEFERART sy-vline 
WA_RJK0601_STR-ETMENGE sy-vline 
WA_RJK0601_STR-STORNOGRD sy-vline 
WA_RJK0601_STR-KUENDGRD sy-vline 
WA_RJK0601_STR-KUENDEING sy-vline 
WA_RJK0601_STR-LIEFENDEG sy-vline 
WA_RJK0601_STR-LIEFENDEI sy-vline 
WA_RJK0601_STR-XKUEND_AKT sy-vline 
WA_RJK0601_STR-PROVRART sy-vline 
WA_RJK0601_STR-RECHENDE sy-vline 
WA_RJK0601_STR-WBZSATZART sy-vline 
WA_RJK0601_STR-WBZVORGART sy-vline 
WA_RJK0601_STR-WBZTERMIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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