ABAP Select data from SAP table RJKAG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKAG
*  INTO TABLE @DATA(IT_RJKAG2).
*--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_RJKAG INDEX 1 INTO DATA(WA_RJKAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKAG>-GPAG = 1.
<RJKAG>-KUNNR = 1.
<RJKAG>-NAMEKURZ = 1.
<RJKAG>-NAMELANG = 1.
<RJKAG>-LINE0 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJKAG-LINE1, sy-vline,
  WA_RJKAG-LINE2, sy-vline,
  WA_RJKAG-LINEK, sy-vline,
  WA_RJKAG-ADRNR, sy-vline,
  WA_RJKAG-AUFSD, sy-vline,
  WA_RJKAG-KALKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJKAG 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_RJKAG 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_RJKAG INTO WA_RJKAG.


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

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

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

*Conversion exit JKWBZ, internal->external for field RECHZENTNR
CALL FUNCTION 'CONVERSION_EXIT_JKWBZ_OUTPUT'
  EXPORTING
    input =                      WA_RJKAG-RECHZENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKAG-RECHZENTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit JKWBZ, internal->external for field WBZKUNNR
CALL FUNCTION 'CONVERSION_EXIT_JKWBZ_OUTPUT'
  EXPORTING
    input =                      WA_RJKAG-WBZKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKAG-WBZKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPNR_WE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJKAG-GPNR_WE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKAG-GPNR_WE.
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_RJKAG_STR, 
GPAG TYPE STRING,
KUNNR TYPE STRING,
NAMEKURZ TYPE STRING,
NAMELANG TYPE STRING,
LINE0 TYPE STRING,
LINE1 TYPE STRING,
LINE2 TYPE STRING,
LINEK TYPE STRING,
ADRNR TYPE STRING,
AUFSD TYPE STRING,
KALKS TYPE STRING,
KURST TYPE STRING,
FAKSD TYPE STRING,
VTWKU TYPE STRING,
SPAKU TYPE STRING,
KDGRP TYPE STRING,
KONDA TYPE STRING,
PLTYP TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
STCEG TYPE STRING,
LAND1 TYPE STRING,
TAXK1 TYPE STRING,
TAXK2 TYPE STRING,
TAXK3 TYPE STRING,
TAXK4 TYPE STRING,
TAXK5 TYPE STRING,
TAXK6 TYPE STRING,
TAXK7 TYPE STRING,
TAXK8 TYPE STRING,
TAXK9 TYPE STRING,
XREMRECHT TYPE STRING,
REMART TYPE STRING,
REMWEISE TYPE STRING,
RECHZENTNR TYPE STRING,
WBZKUNNR TYPE STRING,
VERSG TYPE STRING,
GPNR_WE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKAG_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_RJKAG_STR-GPAG sy-vline 
WA_RJKAG_STR-KUNNR sy-vline 
WA_RJKAG_STR-NAMEKURZ sy-vline 
WA_RJKAG_STR-NAMELANG sy-vline 
WA_RJKAG_STR-LINE0 sy-vline 
WA_RJKAG_STR-LINE1 sy-vline 
WA_RJKAG_STR-LINE2 sy-vline 
WA_RJKAG_STR-LINEK sy-vline 
WA_RJKAG_STR-ADRNR sy-vline 
WA_RJKAG_STR-AUFSD sy-vline 
WA_RJKAG_STR-KALKS sy-vline 
WA_RJKAG_STR-KURST sy-vline 
WA_RJKAG_STR-FAKSD sy-vline 
WA_RJKAG_STR-VTWKU sy-vline 
WA_RJKAG_STR-SPAKU sy-vline 
WA_RJKAG_STR-KDGRP sy-vline 
WA_RJKAG_STR-KONDA sy-vline 
WA_RJKAG_STR-PLTYP sy-vline 
WA_RJKAG_STR-INCO1 sy-vline 
WA_RJKAG_STR-INCO2 sy-vline 
WA_RJKAG_STR-STCEG sy-vline 
WA_RJKAG_STR-LAND1 sy-vline 
WA_RJKAG_STR-TAXK1 sy-vline 
WA_RJKAG_STR-TAXK2 sy-vline 
WA_RJKAG_STR-TAXK3 sy-vline 
WA_RJKAG_STR-TAXK4 sy-vline 
WA_RJKAG_STR-TAXK5 sy-vline 
WA_RJKAG_STR-TAXK6 sy-vline 
WA_RJKAG_STR-TAXK7 sy-vline 
WA_RJKAG_STR-TAXK8 sy-vline 
WA_RJKAG_STR-TAXK9 sy-vline 
WA_RJKAG_STR-XREMRECHT sy-vline 
WA_RJKAG_STR-REMART sy-vline 
WA_RJKAG_STR-REMWEISE sy-vline 
WA_RJKAG_STR-RECHZENTNR sy-vline 
WA_RJKAG_STR-WBZKUNNR sy-vline 
WA_RJKAG_STR-VERSG sy-vline 
WA_RJKAG_STR-GPNR_WE sy-vline      INTO ld_text SEPARATED BY SPACE.

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