ABAP Select data from SAP table RJLG03 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJLG03 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 RJLG03. 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 RJLG03 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_RJLG03 TYPE STANDARD TABLE OF RJLG03,
      WA_RJLG03 TYPE RJLG03,
      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: <RJLG03> TYPE RJLG03.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJLG03.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJLG03
  INTO TABLE IT_RJLG03.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJLG03
*  INTO TABLE @DATA(IT_RJLG032).
*--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_RJLG03 INDEX 1 INTO DATA(WA_RJLG032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJLG03 ASSIGNING <RJLG03>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJLG03>-MANDT = 1.
<RJLG03>-VSG = 1.
<RJLG03>-GPNR = 1.
<RJLG03>-ZUAUSZ = 1.
<RJLG03>-ABWBIS = 1.

ENDLOOP.

LOOP AT IT_RJLG03 INTO WA_RJLG03.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJLG03-ABWVON, sy-vline,
  WA_RJLG03-ABWESART, sy-vline,
  WA_RJLG03-ABWART_HR, sy-vline,
  WA_RJLG03-XHRUEBERL, sy-vline,
  WA_RJLG03-KOMMENT, sy-vline,
  WA_RJLG03-ERFUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJLG03 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_RJLG03 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_RJLG03 INTO WA_RJLG03.


*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 VSG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJLG03-VSG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJLG03-VSG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJLG03-GPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJLG03-GPNR.
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_RJLG03_STR, 
MANDT TYPE STRING,
VSG TYPE STRING,
GPNR TYPE STRING,
ZUAUSZ TYPE STRING,
ABWBIS TYPE STRING,
ABWVON TYPE STRING,
ABWESART TYPE STRING,
ABWART_HR TYPE STRING,
XHRUEBERL TYPE STRING,
KOMMENT TYPE STRING,
ERFUSER TYPE STRING,
ERFDATE TYPE STRING,
ERFTIME TYPE STRING,
AENUSER TYPE STRING,
AENDATE TYPE STRING,
AENTIME TYPE STRING,
MERKER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJLG03_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_RJLG03_STR-MANDT sy-vline 
WA_RJLG03_STR-VSG sy-vline 
WA_RJLG03_STR-GPNR sy-vline 
WA_RJLG03_STR-ZUAUSZ sy-vline 
WA_RJLG03_STR-ABWBIS sy-vline 
WA_RJLG03_STR-ABWVON sy-vline 
WA_RJLG03_STR-ABWESART sy-vline 
WA_RJLG03_STR-ABWART_HR sy-vline 
WA_RJLG03_STR-XHRUEBERL sy-vline 
WA_RJLG03_STR-KOMMENT sy-vline 
WA_RJLG03_STR-ERFUSER sy-vline 
WA_RJLG03_STR-ERFDATE sy-vline 
WA_RJLG03_STR-ERFTIME sy-vline 
WA_RJLG03_STR-AENUSER sy-vline 
WA_RJLG03_STR-AENDATE sy-vline 
WA_RJLG03_STR-AENTIME sy-vline 
WA_RJLG03_STR-MERKER sy-vline      INTO ld_text SEPARATED BY SPACE.

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