ABAP Select data from SAP table NSDM_S_REFERENCES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NSDM_S_REFERENCES
*  INTO TABLE @DATA(IT_NSDM_S_REFERENCES2).
*--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_NSDM_S_REFERENCES INDEX 1 INTO DATA(WA_NSDM_S_REFERENCES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NSDM_S_REFERENCES>-MBLNR = 1.
<NSDM_S_REFERENCES>-MJAHR = 1.
<NSDM_S_REFERENCES>-ZEILE = 1.
<NSDM_S_REFERENCES>-LINE_ID = 1.
<NSDM_S_REFERENCES>-PARENT_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NSDM_S_REFERENCES-LINE_DEPTH, sy-vline,
  WA_NSDM_S_REFERENCES-MAA_URZEI, sy-vline,
  WA_NSDM_S_REFERENCES-KDAUF, sy-vline,
  WA_NSDM_S_REFERENCES-KDPOS, sy-vline,
  WA_NSDM_S_REFERENCES-KDEIN, sy-vline,
  WA_NSDM_S_REFERENCES-EBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NSDM_S_REFERENCES 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_NSDM_S_REFERENCES 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_NSDM_S_REFERENCES INTO WA_NSDM_S_REFERENCES.


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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_NSDM_S_REFERENCES-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NSDM_S_REFERENCES-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field LFBJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_NSDM_S_REFERENCES-LFBJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NSDM_S_REFERENCES-LFBJA.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field SJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_NSDM_S_REFERENCES-SJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NSDM_S_REFERENCES-SJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NSDM_S_REFERENCES-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NSDM_S_REFERENCES-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NSDM_S_REFERENCES-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NSDM_S_REFERENCES-ANLN2.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPH0, internal->external for field EWM_GMDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_NSDM_S_REFERENCES-EWM_GMDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NSDM_S_REFERENCES-EWM_GMDOC.
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_NSDM_S_REFERENCES_STR, 
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
LINE_ID TYPE STRING,
PARENT_ID TYPE STRING,
LINE_DEPTH TYPE STRING,
MAA_URZEI TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBJA TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
SJAHR TYPE STRING,
SMBLN TYPE STRING,
SMBLP TYPE STRING,
AUFNR TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BELUM TYPE STRING,
BUZUM TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,
UBNUM TYPE STRING,
TANUM TYPE STRING,
URZEI TYPE STRING,
XBLNR TYPE STRING,
VBELN_IM TYPE STRING,
VBELP_IM TYPE STRING,
LE_VBELN TYPE STRING,
SPE_LOGSYS TYPE STRING,
SPE_MDNUM_EWM TYPE STRING,
CANCELLED TYPE STRING,
CANCELLATION_TYPE TYPE STRING,
REVERSAL_MOVEMENT TYPE STRING,
SERVICE_DOC_TYPE TYPE STRING,
SERVICE_DOC_ID TYPE STRING,
SERVICE_DOC_ITEM_ID TYPE STRING,
EWM_LGNUM TYPE STRING,
EWM_GMDOC TYPE STRING,
EWM_LGPLA TYPE STRING,
XSTOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NSDM_S_REFERENCES_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_NSDM_S_REFERENCES_STR-MBLNR sy-vline 
WA_NSDM_S_REFERENCES_STR-MJAHR sy-vline 
WA_NSDM_S_REFERENCES_STR-ZEILE sy-vline 
WA_NSDM_S_REFERENCES_STR-LINE_ID sy-vline 
WA_NSDM_S_REFERENCES_STR-PARENT_ID sy-vline 
WA_NSDM_S_REFERENCES_STR-LINE_DEPTH sy-vline 
WA_NSDM_S_REFERENCES_STR-MAA_URZEI sy-vline 
WA_NSDM_S_REFERENCES_STR-KDAUF sy-vline 
WA_NSDM_S_REFERENCES_STR-KDPOS sy-vline 
WA_NSDM_S_REFERENCES_STR-KDEIN sy-vline 
WA_NSDM_S_REFERENCES_STR-EBELN sy-vline 
WA_NSDM_S_REFERENCES_STR-EBELP sy-vline 
WA_NSDM_S_REFERENCES_STR-LFBJA sy-vline 
WA_NSDM_S_REFERENCES_STR-LFBNR sy-vline 
WA_NSDM_S_REFERENCES_STR-LFPOS sy-vline 
WA_NSDM_S_REFERENCES_STR-SJAHR sy-vline 
WA_NSDM_S_REFERENCES_STR-SMBLN sy-vline 
WA_NSDM_S_REFERENCES_STR-SMBLP sy-vline 
WA_NSDM_S_REFERENCES_STR-AUFNR sy-vline 
WA_NSDM_S_REFERENCES_STR-ANLN1 sy-vline 
WA_NSDM_S_REFERENCES_STR-ANLN2 sy-vline 
WA_NSDM_S_REFERENCES_STR-BELNR sy-vline 
WA_NSDM_S_REFERENCES_STR-BUZEI sy-vline 
WA_NSDM_S_REFERENCES_STR-BELUM sy-vline 
WA_NSDM_S_REFERENCES_STR-BUZUM sy-vline 
WA_NSDM_S_REFERENCES_STR-RSNUM sy-vline 
WA_NSDM_S_REFERENCES_STR-RSPOS sy-vline 
WA_NSDM_S_REFERENCES_STR-TBNUM sy-vline 
WA_NSDM_S_REFERENCES_STR-TBPOS sy-vline 
WA_NSDM_S_REFERENCES_STR-UBNUM sy-vline 
WA_NSDM_S_REFERENCES_STR-TANUM sy-vline 
WA_NSDM_S_REFERENCES_STR-URZEI sy-vline 
WA_NSDM_S_REFERENCES_STR-XBLNR sy-vline 
WA_NSDM_S_REFERENCES_STR-VBELN_IM sy-vline 
WA_NSDM_S_REFERENCES_STR-VBELP_IM sy-vline 
WA_NSDM_S_REFERENCES_STR-LE_VBELN sy-vline 
WA_NSDM_S_REFERENCES_STR-SPE_LOGSYS sy-vline 
WA_NSDM_S_REFERENCES_STR-SPE_MDNUM_EWM sy-vline 
WA_NSDM_S_REFERENCES_STR-CANCELLED sy-vline 
WA_NSDM_S_REFERENCES_STR-CANCELLATION_TYPE sy-vline 
WA_NSDM_S_REFERENCES_STR-REVERSAL_MOVEMENT sy-vline 
WA_NSDM_S_REFERENCES_STR-SERVICE_DOC_TYPE sy-vline 
WA_NSDM_S_REFERENCES_STR-SERVICE_DOC_ID sy-vline 
WA_NSDM_S_REFERENCES_STR-SERVICE_DOC_ITEM_ID sy-vline 
WA_NSDM_S_REFERENCES_STR-EWM_LGNUM sy-vline 
WA_NSDM_S_REFERENCES_STR-EWM_GMDOC sy-vline 
WA_NSDM_S_REFERENCES_STR-EWM_LGPLA sy-vline 
WA_NSDM_S_REFERENCES_STR-XSTOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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