ABAP Select data from SAP table V1NAPP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V1NAPP 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 V1NAPP. 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 V1NAPP 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_V1NAPP TYPE STANDARD TABLE OF V1NAPP,
      WA_V1NAPP TYPE V1NAPP,
      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: <V1NAPP> TYPE V1NAPP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V1NAPP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V1NAPP
  INTO TABLE IT_V1NAPP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V1NAPP
*  INTO TABLE @DATA(IT_V1NAPP2).
*--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_V1NAPP INDEX 1 INTO DATA(WA_V1NAPP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V1NAPP ASSIGNING <V1NAPP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V1NAPP>-MANDT = 1.
<V1NAPP>-LNRAPP = 1.
<V1NAPP>-EINRI = 1.
<V1NAPP>-FALNR = 1.
<V1NAPP>-LFDNR = 1.

ENDLOOP.

LOOP AT IT_V1NAPP INTO WA_V1NAPP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V1NAPP-DSPTY, sy-vline,
  WA_V1NAPP-VISTY, sy-vline,
  WA_V1NAPP-BWIDT, sy-vline,
  WA_V1NAPP-BWIZT, sy-vline,
  WA_V1NAPP-STATU, sy-vline,
  WA_V1NAPP-ORGFA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V1NAPP 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_V1NAPP 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_V1NAPP INTO WA_V1NAPP.


*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 LNRAPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-LNRAPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-LNRAPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PERNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-PERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-PERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZIMMR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-ZIMMR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-ZIMMR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FACHR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-FACHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-FACHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PELOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-PELOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-PELOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TMNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V1NAPP-TMNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V1NAPP-TMNID.
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_V1NAPP_STR, 
MANDT TYPE STRING,
LNRAPP TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
DSPTY TYPE STRING,
VISTY TYPE STRING,
BWIDT TYPE STRING,
BWIZT TYPE STRING,
STATU TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
POBNR TYPE STRING,
PERNR TYPE STRING,
ZIMMR TYPE STRING,
KZTXT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
LGTXT TYPE STRING,
DAUER TYPE STRING,
FACHR TYPE STRING,
PELOC TYPE STRING,
STOID TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
TMNID TYPE STRING,
PTINP TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V1NAPP_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_V1NAPP_STR-MANDT sy-vline 
WA_V1NAPP_STR-LNRAPP sy-vline 
WA_V1NAPP_STR-EINRI sy-vline 
WA_V1NAPP_STR-FALNR sy-vline 
WA_V1NAPP_STR-LFDNR sy-vline 
WA_V1NAPP_STR-DSPTY sy-vline 
WA_V1NAPP_STR-VISTY sy-vline 
WA_V1NAPP_STR-BWIDT sy-vline 
WA_V1NAPP_STR-BWIZT sy-vline 
WA_V1NAPP_STR-STATU sy-vline 
WA_V1NAPP_STR-ORGFA sy-vline 
WA_V1NAPP_STR-ORGPF sy-vline 
WA_V1NAPP_STR-POBNR sy-vline 
WA_V1NAPP_STR-PERNR sy-vline 
WA_V1NAPP_STR-ZIMMR sy-vline 
WA_V1NAPP_STR-KZTXT sy-vline 
WA_V1NAPP_STR-ERDAT sy-vline 
WA_V1NAPP_STR-ERUSR sy-vline 
WA_V1NAPP_STR-UPDAT sy-vline 
WA_V1NAPP_STR-UPUSR sy-vline 
WA_V1NAPP_STR-LGTXT sy-vline 
WA_V1NAPP_STR-DAUER sy-vline 
WA_V1NAPP_STR-FACHR sy-vline 
WA_V1NAPP_STR-PELOC sy-vline 
WA_V1NAPP_STR-STOID sy-vline 
WA_V1NAPP_STR-STORN sy-vline 
WA_V1NAPP_STR-STUSR sy-vline 
WA_V1NAPP_STR-STDAT sy-vline 
WA_V1NAPP_STR-TMNID sy-vline 
WA_V1NAPP_STR-PTINP sy-vline 
WA_V1NAPP_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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