ABAP Select data from SAP table NJIT_D_DSG_NRSET 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_DSG_NRSET 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_DSG_NRSET. 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_DSG_NRSET 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_DSG_NRSET TYPE STANDARD TABLE OF NJIT_D_DSG_NRSET,
      WA_NJIT_D_DSG_NRSET TYPE NJIT_D_DSG_NRSET,
      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_DSG_NRSET> TYPE NJIT_D_DSG_NRSET.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NJIT_D_DSG_NRSET
*  INTO TABLE @DATA(IT_NJIT_D_DSG_NRSET2).
*--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_DSG_NRSET INDEX 1 INTO DATA(WA_NJIT_D_DSG_NRSET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NJIT_D_DSG_NRSET>-MANDT = 1.
<NJIT_D_DSG_NRSET>-JITDELIVSQNCNMBRSTTGUUID = 1.
<NJIT_D_DSG_NRSET>-JITDELIVSQNCGRPUUID = 1.
<NJIT_D_DSG_NRSET>-JITDELIVSQNCPCKGGRPLEVEL = 1.
<NJIT_D_DSG_NRSET>-JITCOMPONENTISREORDERED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NJIT_D_DSG_NRSET-JITDELIVSQNCFRMNMBR, sy-vline,
  WA_NJIT_D_DSG_NRSET-JITDELIVSQNCTONMBR, sy-vline,
  WA_NJIT_D_DSG_NRSET-JITDELIVSQNCPREFIX, sy-vline,
  WA_NJIT_D_DSG_NRSET-JITDELIVSQNCLENOFSHRTNMBR, sy-vline,
  WA_NJIT_D_DSG_NRSET-JITREORDDELIVSQNCSUFFIX, sy-vline,
  WA_NJIT_D_DSG_NRSET-JITDELIVSQNCLASTNMBRUSED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NJIT_D_DSG_NRSET 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_DSG_NRSET 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_DSG_NRSET INTO WA_NJIT_D_DSG_NRSET.


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

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

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

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

*Conversion exit ALPHA, internal->external for field JITDELIVSQNCLENOFNMBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NJIT_D_DSG_NRSET-JITDELIVSQNCLENOFNMBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NJIT_D_DSG_NRSET-JITDELIVSQNCLENOFNMBR.
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_DSG_NRSET_STR, 
MANDT TYPE STRING,
JITDELIVSQNCNMBRSTTGUUID TYPE STRING,
JITDELIVSQNCGRPUUID TYPE STRING,
JITDELIVSQNCPCKGGRPLEVEL TYPE STRING,
JITCOMPONENTISREORDERED TYPE STRING,
JITDELIVSQNCFRMNMBR TYPE STRING,
JITDELIVSQNCTONMBR TYPE STRING,
JITDELIVSQNCPREFIX TYPE STRING,
JITDELIVSQNCLENOFSHRTNMBR TYPE STRING,
JITREORDDELIVSQNCSUFFIX TYPE STRING,
JITDELIVSQNCLASTNMBRUSED TYPE STRING,
JITDELIVSQNCLENOFNMBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NJIT_D_DSG_NRSET_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_DSG_NRSET_STR-MANDT sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCNMBRSTTGUUID sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCGRPUUID sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCPCKGGRPLEVEL sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITCOMPONENTISREORDERED sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCFRMNMBR sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCTONMBR sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCPREFIX sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCLENOFSHRTNMBR sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITREORDDELIVSQNCSUFFIX sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCLASTNMBRUSED sy-vline 
WA_NJIT_D_DSG_NRSET_STR-JITDELIVSQNCLENOFNMBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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