ABAP Select data from SAP table RJP_MARA_GRX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJP_MARA_GRX
*  INTO TABLE @DATA(IT_RJP_MARA_GRX2).
*--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_RJP_MARA_GRX INDEX 1 INTO DATA(WA_RJP_MARA_GRX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJP_MARA_GRX>-MANDT = 1.
<RJP_MARA_GRX>-MATNR = 1.
<RJP_MARA_GRX>-MEINS = 1.
<RJP_MARA_GRX>-EAN11 = 1.
<RJP_MARA_GRX>-NUMTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJP_MARA_GRX-ISMCOPYNR, sy-vline,
  WA_RJP_MARA_GRX-ISMPUBLDATE, sy-vline,
  WA_RJP_MARA_GRX-ISMDESIGN, sy-vline,
  WA_RJP_MARA_GRX-NTGEW, sy-vline,
  WA_RJP_MARA_GRX-GEWEI, sy-vline,
  WA_RJP_MARA_GRX-ISMTITLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJP_MARA_GRX 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_RJP_MARA_GRX 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_RJP_MARA_GRX INTO WA_RJP_MARA_GRX.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MARA_GRX-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MARA_GRX-MATNR.
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_RJP_MARA_GRX_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
EAN11 TYPE STRING,
NUMTP TYPE STRING,
ISMCOPYNR TYPE STRING,
ISMPUBLDATE TYPE STRING,
ISMDESIGN TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
ISMTITLE TYPE STRING,
ISMSUBTITLE1 TYPE STRING,
ISMSUBTITLE2 TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
MAKTX TYPE STRING,
KBETR TYPE STRING,
LIFNR TYPE STRING,
KONWA TYPE STRING,
NETPR TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJP_MARA_GRX_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_RJP_MARA_GRX_STR-MANDT sy-vline 
WA_RJP_MARA_GRX_STR-MATNR sy-vline 
WA_RJP_MARA_GRX_STR-MEINS sy-vline 
WA_RJP_MARA_GRX_STR-EAN11 sy-vline 
WA_RJP_MARA_GRX_STR-NUMTP sy-vline 
WA_RJP_MARA_GRX_STR-ISMCOPYNR sy-vline 
WA_RJP_MARA_GRX_STR-ISMPUBLDATE sy-vline 
WA_RJP_MARA_GRX_STR-ISMDESIGN sy-vline 
WA_RJP_MARA_GRX_STR-NTGEW sy-vline 
WA_RJP_MARA_GRX_STR-GEWEI sy-vline 
WA_RJP_MARA_GRX_STR-ISMTITLE sy-vline 
WA_RJP_MARA_GRX_STR-ISMSUBTITLE1 sy-vline 
WA_RJP_MARA_GRX_STR-ISMSUBTITLE2 sy-vline 
WA_RJP_MARA_GRX_STR-LAENG sy-vline 
WA_RJP_MARA_GRX_STR-BREIT sy-vline 
WA_RJP_MARA_GRX_STR-HOEHE sy-vline 
WA_RJP_MARA_GRX_STR-MEABM sy-vline 
WA_RJP_MARA_GRX_STR-MAKTX sy-vline 
WA_RJP_MARA_GRX_STR-KBETR sy-vline 
WA_RJP_MARA_GRX_STR-LIFNR sy-vline 
WA_RJP_MARA_GRX_STR-KONWA sy-vline 
WA_RJP_MARA_GRX_STR-NETPR sy-vline 
WA_RJP_MARA_GRX_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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