ABAP Select data from SAP table IFNETHDREX into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IFNETHDREX 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 IFNETHDREX. 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 IFNETHDREX 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_IFNETHDREX TYPE STANDARD TABLE OF IFNETHDREX,
      WA_IFNETHDREX TYPE IFNETHDREX,
      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: <IFNETHDREX> TYPE IFNETHDREX.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFNETHDREX
*  INTO TABLE @DATA(IT_IFNETHDREX2).
*--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_IFNETHDREX INDEX 1 INTO DATA(WA_IFNETHDREX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFNETHDREX>-AUFNR = 1.
<IFNETHDREX>-AUART = 1.
<IFNETHDREX>-KTEXT = 1.
<IFNETHDREX>-BUKRS = 1.
<IFNETHDREX>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFNETHDREX-GSBER, sy-vline,
  WA_IFNETHDREX-KOKRS, sy-vline,
  WA_IFNETHDREX-WAERS, sy-vline,
  WA_IFNETHDREX-PRCTR, sy-vline,
  WA_IFNETHDREX-POSID, sy-vline,
  WA_IFNETHDREX-TXJCD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFNETHDREX 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_IFNETHDREX 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_IFNETHDREX INTO WA_IFNETHDREX.


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

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

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_IFNETHDREX-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFNETHDREX-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SCOPE, internal->external for field SCOPE
CALL FUNCTION 'CONVERSION_EXIT_SCOPE_OUTPUT'
  EXPORTING
    input =                      WA_IFNETHDREX-SCOPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFNETHDREX-SCOPE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_IFNETHDREX-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFNETHDREX-PSPID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNT
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_IFNETHDREX-VORNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFNETHDREX-VORNT.
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_IFNETHDREX_STR, 
AUFNR TYPE STRING,
AUART TYPE STRING,
KTEXT TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
WAERS TYPE STRING,
PRCTR TYPE STRING,
POSID TYPE STRING,
TXJCD TYPE STRING,
SCOPE TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
GLTRP TYPE STRING,
GSTRP TYPE STRING,
FTRMS TYPE STRING,
GLTRS TYPE STRING,
GSTRS TYPE STRING,
GSTRI TYPE STRING,
GETRI TYPE STRING,
GLTRI TYPE STRING,
FTRMI TYPE STRING,
FTRMP TYPE STRING,
DISPO TYPE STRING,
TERKZ TYPE STRING,
REDKZ TYPE STRING,
APRIO TYPE STRING,
GLUZS TYPE STRING,
GSUZS TYPE STRING,
PROFID TYPE STRING,
PSPID TYPE STRING,
NAUTERM TYPE STRING,
NAUCOST TYPE STRING,
AUFNT TYPE STRING,
VORNT TYPE STRING,
NO_DISP TYPE STRING,
GSUZI TYPE STRING,
GEUZI TYPE STRING,
STATXT TYPE STRING,
LOEKZ TYPE STRING,
GLTPP TYPE STRING,
GLUPP TYPE STRING,
GSTPP TYPE STRING,
GSUPP TYPE STRING,
GLTPS TYPE STRING,
GLUPS TYPE STRING,
GSTPS TYPE STRING,
GSUPS TYPE STRING,
FTRPS TYPE STRING,
RDKZP TYPE STRING,
TRKZP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFNETHDREX_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_IFNETHDREX_STR-AUFNR sy-vline 
WA_IFNETHDREX_STR-AUART sy-vline 
WA_IFNETHDREX_STR-KTEXT sy-vline 
WA_IFNETHDREX_STR-BUKRS sy-vline 
WA_IFNETHDREX_STR-WERKS sy-vline 
WA_IFNETHDREX_STR-GSBER sy-vline 
WA_IFNETHDREX_STR-KOKRS sy-vline 
WA_IFNETHDREX_STR-WAERS sy-vline 
WA_IFNETHDREX_STR-PRCTR sy-vline 
WA_IFNETHDREX_STR-POSID sy-vline 
WA_IFNETHDREX_STR-TXJCD sy-vline 
WA_IFNETHDREX_STR-SCOPE sy-vline 
WA_IFNETHDREX_STR-KDAUF sy-vline 
WA_IFNETHDREX_STR-KDPOS sy-vline 
WA_IFNETHDREX_STR-GLTRP sy-vline 
WA_IFNETHDREX_STR-GSTRP sy-vline 
WA_IFNETHDREX_STR-FTRMS sy-vline 
WA_IFNETHDREX_STR-GLTRS sy-vline 
WA_IFNETHDREX_STR-GSTRS sy-vline 
WA_IFNETHDREX_STR-GSTRI sy-vline 
WA_IFNETHDREX_STR-GETRI sy-vline 
WA_IFNETHDREX_STR-GLTRI sy-vline 
WA_IFNETHDREX_STR-FTRMI sy-vline 
WA_IFNETHDREX_STR-FTRMP sy-vline 
WA_IFNETHDREX_STR-DISPO sy-vline 
WA_IFNETHDREX_STR-TERKZ sy-vline 
WA_IFNETHDREX_STR-REDKZ sy-vline 
WA_IFNETHDREX_STR-APRIO sy-vline 
WA_IFNETHDREX_STR-GLUZS sy-vline 
WA_IFNETHDREX_STR-GSUZS sy-vline 
WA_IFNETHDREX_STR-PROFID sy-vline 
WA_IFNETHDREX_STR-PSPID sy-vline 
WA_IFNETHDREX_STR-NAUTERM sy-vline 
WA_IFNETHDREX_STR-NAUCOST sy-vline 
WA_IFNETHDREX_STR-AUFNT sy-vline 
WA_IFNETHDREX_STR-VORNT sy-vline 
WA_IFNETHDREX_STR-NO_DISP sy-vline 
WA_IFNETHDREX_STR-GSUZI sy-vline 
WA_IFNETHDREX_STR-GEUZI sy-vline 
WA_IFNETHDREX_STR-STATXT sy-vline 
WA_IFNETHDREX_STR-LOEKZ sy-vline 
WA_IFNETHDREX_STR-GLTPP sy-vline 
WA_IFNETHDREX_STR-GLUPP sy-vline 
WA_IFNETHDREX_STR-GSTPP sy-vline 
WA_IFNETHDREX_STR-GSUPP sy-vline 
WA_IFNETHDREX_STR-GLTPS sy-vline 
WA_IFNETHDREX_STR-GLUPS sy-vline 
WA_IFNETHDREX_STR-GSTPS sy-vline 
WA_IFNETHDREX_STR-GSUPS sy-vline 
WA_IFNETHDREX_STR-FTRPS sy-vline 
WA_IFNETHDREX_STR-RDKZP sy-vline 
WA_IFNETHDREX_STR-TRKZP sy-vline      INTO ld_text SEPARATED BY SPACE.

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