ABAP Select data from SAP table RJK0301 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJK0301 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 RJK0301. 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 RJK0301 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_RJK0301 TYPE STANDARD TABLE OF RJK0301,
      WA_RJK0301 TYPE RJK0301,
      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: <RJK0301> TYPE RJK0301.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJK0301.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJK0301
  INTO TABLE IT_RJK0301.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJK0301
*  INTO TABLE @DATA(IT_RJK03012).
*--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_RJK0301 INDEX 1 INTO DATA(WA_RJK03012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJK0301 ASSIGNING <RJK0301>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJK0301>-VBELN = 1.
<RJK0301>-POSNR = 1.
<RJK0301>-VRSNDDATUM = 1.
<RJK0301>-FEHLERSEIT = 1.
<RJK0301>-FEHLEXEMPL = 1.

ENDLOOP.

LOOP AT IT_RJK0301 INTO WA_RJK0301.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJK0301-WAERK, sy-vline,
  WA_RJK0301-NETWR, sy-vline,
  WA_RJK0301-FVGRUND, sy-vline,
  WA_RJK0301-KURZTEXT, sy-vline,
  WA_RJK0301-REMDATUM, sy-vline,
  WA_RJK0301-REMVON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJK0301 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_RJK0301 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_RJK0301 INTO WA_RJK0301.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJK0301-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJK0301-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field REMME_IST
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJK0301-REMME_IST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJK0301-REMME_IST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REMMELDUNG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJK0301-REMMELDUNG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJK0301-REMMELDUNG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FKNR_N
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJK0301-FKNR_N
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJK0301-FKNR_N.
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_RJK0301_STR, 
VBELN TYPE STRING,
POSNR TYPE STRING,
VRSNDDATUM TYPE STRING,
FEHLERSEIT TYPE STRING,
FEHLEXEMPL TYPE STRING,
WAERK TYPE STRING,
NETWR TYPE STRING,
FVGRUND TYPE STRING,
KURZTEXT TYPE STRING,
REMDATUM TYPE STRING,
REMVON TYPE STRING,
REMBIS TYPE STRING,
REMMG_IST TYPE STRING,
REMME_IST TYPE STRING,
REMMELDUNG TYPE STRING,
REFBELEG TYPE STRING,
ETVORZEI TYPE STRING,
REMSP TYPE STRING,
REMTAGE TYPE STRING,
FKDAT TYPE STRING,
FAKVON TYPE STRING,
FAKBIS TYPE STRING,
FKNR_N TYPE STRING,
FPNR_N TYPE STRING,
FKART TYPE STRING,
BRTWR TYPE STRING,
REMSCHEIN TYPE STRING,
BEZ_STATUS TYPE STRING,
REKLDATUM TYPE STRING,
FEHLERBIS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJK0301_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_RJK0301_STR-VBELN sy-vline 
WA_RJK0301_STR-POSNR sy-vline 
WA_RJK0301_STR-VRSNDDATUM sy-vline 
WA_RJK0301_STR-FEHLERSEIT sy-vline 
WA_RJK0301_STR-FEHLEXEMPL sy-vline 
WA_RJK0301_STR-WAERK sy-vline 
WA_RJK0301_STR-NETWR sy-vline 
WA_RJK0301_STR-FVGRUND sy-vline 
WA_RJK0301_STR-KURZTEXT sy-vline 
WA_RJK0301_STR-REMDATUM sy-vline 
WA_RJK0301_STR-REMVON sy-vline 
WA_RJK0301_STR-REMBIS sy-vline 
WA_RJK0301_STR-REMMG_IST sy-vline 
WA_RJK0301_STR-REMME_IST sy-vline 
WA_RJK0301_STR-REMMELDUNG sy-vline 
WA_RJK0301_STR-REFBELEG sy-vline 
WA_RJK0301_STR-ETVORZEI sy-vline 
WA_RJK0301_STR-REMSP sy-vline 
WA_RJK0301_STR-REMTAGE sy-vline 
WA_RJK0301_STR-FKDAT sy-vline 
WA_RJK0301_STR-FAKVON sy-vline 
WA_RJK0301_STR-FAKBIS sy-vline 
WA_RJK0301_STR-FKNR_N sy-vline 
WA_RJK0301_STR-FPNR_N sy-vline 
WA_RJK0301_STR-FKART sy-vline 
WA_RJK0301_STR-BRTWR sy-vline 
WA_RJK0301_STR-REMSCHEIN sy-vline 
WA_RJK0301_STR-BEZ_STATUS sy-vline 
WA_RJK0301_STR-REKLDATUM sy-vline 
WA_RJK0301_STR-FEHLERBIS sy-vline      INTO ld_text SEPARATED BY SPACE.

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