ABAP Select data from SAP table NJIT_D_DCNF_DREF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NJIT_D_DCNF_DREF
*  INTO TABLE @DATA(IT_NJIT_D_DCNF_DREF2).
*--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_NJIT_D_DCNF_DREF INDEX 1 INTO DATA(WA_NJIT_D_DCNF_DREF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NJIT_D_DCNF_DREF>-MANDT = 1.
<NJIT_D_DCNF_DREF>-JITDELIVCONFREFDOCUUID = 1.
<NJIT_D_DCNF_DREF>-JITDELIVERYCONFIRMATIONITMUUID = 1.
<NJIT_D_DCNF_DREF>-JITDELIVERYCONFIRMATIONUUID = 1.
<NJIT_D_DCNF_DREF>-BUSINESSTRANSACTIONDOCTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NJIT_D_DCNF_DREF-BUSINESSTRANSACTIONDOCUMENT, sy-vline,
  WA_NJIT_D_DCNF_DREF-BUSINESSTRANSDOCCREATIONDATE, sy-vline,
  WA_NJIT_D_DCNF_DREF-BUSINESSTRANSACTIONDOCITEM, sy-vline,
  WA_NJIT_D_DCNF_DREF-BUSTRANSDOCREFERENCEID, sy-vline,
  WA_NJIT_D_DCNF_DREF-JITDELIVCONFFORREORDER, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_NJIT_D_DCNF_DREF 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_NJIT_D_DCNF_DREF 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_NJIT_D_DCNF_DREF INTO WA_NJIT_D_DCNF_DREF.


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

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

*Conversion exit ALPHA, internal->external for field BUSTRANSDOCREFERENCEID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_D_DCNF_DREF-BUSTRANSDOCREFERENCEID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_D_DCNF_DREF-BUSTRANSDOCREFERENCEID.
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_NJIT_D_DCNF_DREF_STR, 
MANDT TYPE STRING,
JITDELIVCONFREFDOCUUID TYPE STRING,
JITDELIVERYCONFIRMATIONITMUUID TYPE STRING,
JITDELIVERYCONFIRMATIONUUID TYPE STRING,
BUSINESSTRANSACTIONDOCTYPE TYPE STRING,
BUSINESSTRANSACTIONDOCUMENT TYPE STRING,
BUSINESSTRANSDOCCREATIONDATE TYPE STRING,
BUSINESSTRANSACTIONDOCITEM TYPE STRING,
BUSTRANSDOCREFERENCEID TYPE STRING,
JITDELIVCONFFORREORDER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NJIT_D_DCNF_DREF_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_NJIT_D_DCNF_DREF_STR-MANDT sy-vline 
WA_NJIT_D_DCNF_DREF_STR-JITDELIVCONFREFDOCUUID sy-vline 
WA_NJIT_D_DCNF_DREF_STR-JITDELIVERYCONFIRMATIONITMUUID sy-vline 
WA_NJIT_D_DCNF_DREF_STR-JITDELIVERYCONFIRMATIONUUID sy-vline 
WA_NJIT_D_DCNF_DREF_STR-BUSINESSTRANSACTIONDOCTYPE sy-vline 
WA_NJIT_D_DCNF_DREF_STR-BUSINESSTRANSACTIONDOCUMENT sy-vline 
WA_NJIT_D_DCNF_DREF_STR-BUSINESSTRANSDOCCREATIONDATE sy-vline 
WA_NJIT_D_DCNF_DREF_STR-BUSINESSTRANSACTIONDOCITEM sy-vline 
WA_NJIT_D_DCNF_DREF_STR-BUSTRANSDOCREFERENCEID sy-vline 
WA_NJIT_D_DCNF_DREF_STR-JITDELIVCONFFORREORDER sy-vline      INTO ld_text SEPARATED BY SPACE.

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