ABAP Select data from SAP table WRFMGROUPNODEEXTENSION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRFMGROUPNODEEXTENSION
*  INTO TABLE @DATA(IT_WRFMGROUPNODEEXTENSION2).
*--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_WRFMGROUPNODEEXTENSION INDEX 1 INTO DATA(WA_WRFMGROUPNODEEXTENSION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRFMGROUPNODEEXTENSION>-KZMGROUP = 1.
<WRFMGROUPNODEEXTENSION>-TEMP_DESC = 1.
<WRFMGROUPNODEEXTENSION>-BSTAT = 1.
<WRFMGROUPNODEEXTENSION>-MTART = 1.
<WRFMGROUPNODEEXTENSION>-MATKL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRFMGROUPNODEEXTENSION-ATTYP, sy-vline,
  WA_WRFMGROUPNODEEXTENSION-EKORG, sy-vline,
  WA_WRFMGROUPNODEEXTENSION-LIFNR, sy-vline,
  WA_WRFMGROUPNODEEXTENSION-ESOKZ, sy-vline,
  WA_WRFMGROUPNODEEXTENSION-VKORG, sy-vline,
  WA_WRFMGROUPNODEEXTENSION-VTWEG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRFMGROUPNODEEXTENSION 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_WRFMGROUPNODEEXTENSION 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_WRFMGROUPNODEEXTENSION INTO WA_WRFMGROUPNODEEXTENSION.


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

*Conversion exit MATN1, internal->external for field RMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRFMGROUPNODEEXTENSION-RMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMGROUPNODEEXTENSION-RMATN.
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_WRFMGROUPNODEEXTENSION_STR, 
KZMGROUP TYPE STRING,
TEMP_DESC TYPE STRING,
BSTAT TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
ATTYP TYPE STRING,
EKORG TYPE STRING,
LIFNR TYPE STRING,
ESOKZ TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
WERKS TYPE STRING,
RMATN TYPE STRING,
ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRFMGROUPNODEEXTENSION_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_WRFMGROUPNODEEXTENSION_STR-KZMGROUP sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-TEMP_DESC sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-BSTAT sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-MTART sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-MATKL sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-ATTYP sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-EKORG sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-LIFNR sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-ESOKZ sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-VKORG sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-VTWEG sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-WERKS sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-RMATN sy-vline 
WA_WRFMGROUPNODEEXTENSION_STR-ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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