ABAP Select data from SAP table V_N1STGR 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 V_N1STGR 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 V_N1STGR. 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 V_N1STGR 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_V_N1STGR TYPE STANDARD TABLE OF V_N1STGR,
      WA_V_N1STGR TYPE V_N1STGR,
      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: <V_N1STGR> TYPE V_N1STGR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_N1STGR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_N1STGR
  INTO TABLE IT_V_N1STGR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_N1STGR
*  INTO TABLE @DATA(IT_V_N1STGR2).
*--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_V_N1STGR INDEX 1 INTO DATA(WA_V_N1STGR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_N1STGR ASSIGNING <V_N1STGR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_N1STGR>-MANDT = 1.
<V_N1STGR>-EINRI = 1.
<V_N1STGR>-STOID = 1.
<V_N1STGR>-ERDAT = 1.
<V_N1STGR>-ERUSR = 1.

ENDLOOP.

LOOP AT IT_V_N1STGR INTO WA_V_N1STGR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_N1STGR-UPDAT, sy-vline,
  WA_V_N1STGR-UPUSR, sy-vline,
  WA_V_N1STGR-LOEKZ, sy-vline,
  WA_V_N1STGR-LOUSR, sy-vline,
  WA_V_N1STGR-LODAT, sy-vline,
  WA_V_N1STGR-KZSERV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_N1STGR 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_V_N1STGR 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_V_N1STGR INTO WA_V_N1STGR.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_N1STGR-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_N1STGR-EINRI.
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_V_N1STGR_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
STOID TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
KZSERV TYPE STRING,
KZMOVE TYPE STRING,
STGOP TYPE STRING,
STGFA TYPE STRING,
STLMT TYPE STRING,
STGVP TYPE STRING,
STPRG TYPE STRING,
STMEORDER TYPE STRING,
STMEEVENT TYPE STRING,
N1STOTX TYPE STRING,
KZFAK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_N1STGR_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_V_N1STGR_STR-MANDT sy-vline 
WA_V_N1STGR_STR-EINRI sy-vline 
WA_V_N1STGR_STR-STOID sy-vline 
WA_V_N1STGR_STR-ERDAT sy-vline 
WA_V_N1STGR_STR-ERUSR sy-vline 
WA_V_N1STGR_STR-UPDAT sy-vline 
WA_V_N1STGR_STR-UPUSR sy-vline 
WA_V_N1STGR_STR-LOEKZ sy-vline 
WA_V_N1STGR_STR-LOUSR sy-vline 
WA_V_N1STGR_STR-LODAT sy-vline 
WA_V_N1STGR_STR-KZSERV sy-vline 
WA_V_N1STGR_STR-KZMOVE sy-vline 
WA_V_N1STGR_STR-STGOP sy-vline 
WA_V_N1STGR_STR-STGFA sy-vline 
WA_V_N1STGR_STR-STLMT sy-vline 
WA_V_N1STGR_STR-STGVP sy-vline 
WA_V_N1STGR_STR-STPRG sy-vline 
WA_V_N1STGR_STR-STMEORDER sy-vline 
WA_V_N1STGR_STR-STMEEVENT sy-vline 
WA_V_N1STGR_STR-N1STOTX sy-vline 
WA_V_N1STGR_STR-KZFAK sy-vline      INTO ld_text SEPARATED BY SPACE.

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