ABAP Select data from SAP table RJMG073 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJMG073 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 RJMG073. 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 RJMG073 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_RJMG073 TYPE STANDARD TABLE OF RJMG073,
      WA_RJMG073 TYPE RJMG073,
      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: <RJMG073> TYPE RJMG073.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJMG073.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJMG073
  INTO TABLE IT_RJMG073.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJMG073
*  INTO TABLE @DATA(IT_RJMG0732).
*--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_RJMG073 INDEX 1 INTO DATA(WA_RJMG0732).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJMG073 ASSIGNING <RJMG073>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJMG073>-JPARVW = 1.
<RJMG073>-WDAT1 = 1.
<RJMG073>-WDAT2 = 1.
<RJMG073>-XVOR = 1.
<RJMG073>-XNACH = 1.

ENDLOOP.

LOOP AT IT_RJMG073 INTO WA_RJMG073.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJMG073-XNO, sy-vline,
  WA_RJMG073-XCHGVOR, sy-vline,
  WA_RJMG073-XCHGNACH, sy-vline,
  WA_RJMG073-XCHGNO, sy-vline,
  WA_RJMG073-XCHGWDAT1, sy-vline,
  WA_RJMG073-XCHGWDAT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJMG073 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_RJMG073 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_RJMG073 INTO WA_RJMG073.


*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 PARVW, internal->external for field JPARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_RJMG073-JPARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJMG073-JPARVW.
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_RJMG073_STR, 
JPARVW TYPE STRING,
WDAT1 TYPE STRING,
WDAT2 TYPE STRING,
XVOR TYPE STRING,
XNACH TYPE STRING,
XNO TYPE STRING,
XCHGVOR TYPE STRING,
XCHGNACH TYPE STRING,
XCHGNO TYPE STRING,
XCHGWDAT1 TYPE STRING,
XCHGWDAT2 TYPE STRING,
XCHGJPARVW TYPE STRING,
XANSVORSCH TYPE STRING,
XNOCARPERMESS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJMG073_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_RJMG073_STR-JPARVW sy-vline 
WA_RJMG073_STR-WDAT1 sy-vline 
WA_RJMG073_STR-WDAT2 sy-vline 
WA_RJMG073_STR-XVOR sy-vline 
WA_RJMG073_STR-XNACH sy-vline 
WA_RJMG073_STR-XNO sy-vline 
WA_RJMG073_STR-XCHGVOR sy-vline 
WA_RJMG073_STR-XCHGNACH sy-vline 
WA_RJMG073_STR-XCHGNO sy-vline 
WA_RJMG073_STR-XCHGWDAT1 sy-vline 
WA_RJMG073_STR-XCHGWDAT2 sy-vline 
WA_RJMG073_STR-XCHGJPARVW sy-vline 
WA_RJMG073_STR-XANSVORSCH sy-vline 
WA_RJMG073_STR-XNOCARPERMESS sy-vline      INTO ld_text SEPARATED BY SPACE.

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