ABAP Select data from SAP table V_NC301P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_NC301P 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_NC301P. 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_NC301P 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_NC301P TYPE STANDARD TABLE OF V_NC301P,
      WA_V_NC301P TYPE V_NC301P,
      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_NC301P> TYPE V_NC301P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_NC301P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_NC301P
  INTO TABLE IT_V_NC301P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_NC301P
*  INTO TABLE @DATA(IT_V_NC301P2).
*--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_NC301P INDEX 1 INTO DATA(WA_V_NC301P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_NC301P ASSIGNING <V_NC301P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_NC301P>-MANDT = 1.
<V_NC301P>-DAS301 = 1.
<V_NC301P>-INSTNR = 1.
<V_NC301P>-DAS301ART = 1.
<V_NC301P>-DINSTNR = 1.

ENDLOOP.

LOOP AT IT_V_NC301P INTO WA_V_NC301P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_NC301P-DAS301KB, sy-vline,
  WA_V_NC301P-NAME1, sy-vline,
  WA_V_NC301P-NAME2, sy-vline,
  WA_V_NC301P-STRAS, sy-vline,
  WA_V_NC301P-PSTLZ, sy-vline,
  WA_V_NC301P-PFACH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_NC301P 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_NC301P 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_NC301P INTO WA_V_NC301P.


*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 INSTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NC301P-INSTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NC301P-INSTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DINSTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_NC301P-DINSTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_NC301P-DINSTNR.
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_NC301P_STR, 
MANDT TYPE STRING,
DAS301 TYPE STRING,
INSTNR TYPE STRING,
DAS301ART TYPE STRING,
DINSTNR TYPE STRING,
DAS301KB TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
STRAS TYPE STRING,
PSTLZ TYPE STRING,
PFACH TYPE STRING,
PLZPF TYPE STRING,
ORT TYPE STRING,
LAND TYPE STRING,
BLAND TYPE STRING,
ANSPR TYPE STRING,
TELFN TYPE STRING,
TELFX TYPE STRING,
ENDDT TYPE STRING,
BEGDT TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
UPUSR TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERUSR TYPE STRING,
DDAS301 TYPE STRING,
STYLESHEET_PATH TYPE STRING,
PP_PATH TYPE STRING,
PP_DEST TYPE STRING,
PP_SHARE_WIN TYPE STRING,
PP_SHARE_WAS TYPE STRING,
/ISHFR/RECNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_NC301P_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_NC301P_STR-MANDT sy-vline 
WA_V_NC301P_STR-DAS301 sy-vline 
WA_V_NC301P_STR-INSTNR sy-vline 
WA_V_NC301P_STR-DAS301ART sy-vline 
WA_V_NC301P_STR-DINSTNR sy-vline 
WA_V_NC301P_STR-DAS301KB sy-vline 
WA_V_NC301P_STR-NAME1 sy-vline 
WA_V_NC301P_STR-NAME2 sy-vline 
WA_V_NC301P_STR-STRAS sy-vline 
WA_V_NC301P_STR-PSTLZ sy-vline 
WA_V_NC301P_STR-PFACH sy-vline 
WA_V_NC301P_STR-PLZPF sy-vline 
WA_V_NC301P_STR-ORT sy-vline 
WA_V_NC301P_STR-LAND sy-vline 
WA_V_NC301P_STR-BLAND sy-vline 
WA_V_NC301P_STR-ANSPR sy-vline 
WA_V_NC301P_STR-TELFN sy-vline 
WA_V_NC301P_STR-TELFX sy-vline 
WA_V_NC301P_STR-ENDDT sy-vline 
WA_V_NC301P_STR-BEGDT sy-vline 
WA_V_NC301P_STR-UPDAT sy-vline 
WA_V_NC301P_STR-UPTIM sy-vline 
WA_V_NC301P_STR-UPUSR sy-vline 
WA_V_NC301P_STR-ERDAT sy-vline 
WA_V_NC301P_STR-ERTIM sy-vline 
WA_V_NC301P_STR-ERUSR sy-vline 
WA_V_NC301P_STR-DDAS301 sy-vline 
WA_V_NC301P_STR-STYLESHEET_PATH sy-vline 
WA_V_NC301P_STR-PP_PATH sy-vline 
WA_V_NC301P_STR-PP_DEST sy-vline 
WA_V_NC301P_STR-PP_SHARE_WIN sy-vline 
WA_V_NC301P_STR-PP_SHARE_WAS sy-vline 
WA_V_NC301P_STR-/ISHFR/RECNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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