ABAP Select data from SAP table NPRODUCT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NPRODUCT
*  INTO TABLE @DATA(IT_NPRODUCT2).
*--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_NPRODUCT INDEX 1 INTO DATA(WA_NPRODUCT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NPRODUCT>-MANDT = 1.
<NPRODUCT>-PRODUCT = 1.
<NPRODUCT>-SOURCEOFSUPPLY = 1.
<NPRODUCT>-MANUFACTURERNUMBER = 1.
<NPRODUCT>-PURCHASEORDERQUANTITYUNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NPRODUCT-AUTHORIZATIONGROUP, sy-vline,
  WA_NPRODUCT-BASEUNIT, sy-vline,
  WA_NPRODUCT-CREATEDBYUSER, sy-vline,
  WA_NPRODUCT-LASTCHANGEDBYUSER, sy-vline,
  WA_NPRODUCT-DIVISION, sy-vline,
  WA_NPRODUCT-GROSSWEIGHT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NPRODUCT 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_NPRODUCT 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_NPRODUCT INTO WA_NPRODUCT.


*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 MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_NPRODUCT-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPRODUCT-PRODUCT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field PURCHASEORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NPRODUCT-PURCHASEORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPRODUCT-PURCHASEORDERQUANTITYUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NPRODUCT-BASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPRODUCT-BASEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WEIGHTUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NPRODUCT-WEIGHTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPRODUCT-WEIGHTUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field PRODUCTSTANDARDID
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_NPRODUCT-PRODUCTSTANDARDID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPRODUCT-PRODUCTSTANDARDID.
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_NPRODUCT_STR, 
MANDT TYPE STRING,
PRODUCT TYPE STRING,
SOURCEOFSUPPLY TYPE STRING,
MANUFACTURERNUMBER TYPE STRING,
PURCHASEORDERQUANTITYUNIT TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
BASEUNIT TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
DIVISION TYPE STRING,
GROSSWEIGHT TYPE STRING,
NETWEIGHT TYPE STRING,
PRODUCTEXTERNALID TYPE STRING,
WEIGHTUNIT TYPE STRING,
PRODUCTCATEGORY TYPE STRING,
PRODUCTGROUP TYPE STRING,
PRODUCTOLDID TYPE STRING,
PRODUCTSTANDARDID TYPE STRING,
PRODUCTTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NPRODUCT_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_NPRODUCT_STR-MANDT sy-vline 
WA_NPRODUCT_STR-PRODUCT sy-vline 
WA_NPRODUCT_STR-SOURCEOFSUPPLY sy-vline 
WA_NPRODUCT_STR-MANUFACTURERNUMBER sy-vline 
WA_NPRODUCT_STR-PURCHASEORDERQUANTITYUNIT sy-vline 
WA_NPRODUCT_STR-AUTHORIZATIONGROUP sy-vline 
WA_NPRODUCT_STR-BASEUNIT sy-vline 
WA_NPRODUCT_STR-CREATEDBYUSER sy-vline 
WA_NPRODUCT_STR-LASTCHANGEDBYUSER sy-vline 
WA_NPRODUCT_STR-DIVISION sy-vline 
WA_NPRODUCT_STR-GROSSWEIGHT sy-vline 
WA_NPRODUCT_STR-NETWEIGHT sy-vline 
WA_NPRODUCT_STR-PRODUCTEXTERNALID sy-vline 
WA_NPRODUCT_STR-WEIGHTUNIT sy-vline 
WA_NPRODUCT_STR-PRODUCTCATEGORY sy-vline 
WA_NPRODUCT_STR-PRODUCTGROUP sy-vline 
WA_NPRODUCT_STR-PRODUCTOLDID sy-vline 
WA_NPRODUCT_STR-PRODUCTSTANDARDID sy-vline 
WA_NPRODUCT_STR-PRODUCTTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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