ABAP Select data from SAP table VN1LAPP 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 VN1LAPP 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 VN1LAPP. 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 VN1LAPP 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_VN1LAPP TYPE STANDARD TABLE OF VN1LAPP,
      WA_VN1LAPP TYPE VN1LAPP,
      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: <VN1LAPP> TYPE VN1LAPP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN1LAPP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN1LAPP
  INTO TABLE IT_VN1LAPP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN1LAPP
*  INTO TABLE @DATA(IT_VN1LAPP2).
*--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_VN1LAPP INDEX 1 INTO DATA(WA_VN1LAPP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN1LAPP ASSIGNING <VN1LAPP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN1LAPP>-MANDT = 1.
<VN1LAPP>-EINRI = 1.
<VN1LAPP>-NRN1LAPP = 1.
<VN1LAPP>-LNRAPP = 1.
<VN1LAPP>-LEIST = 1.

ENDLOOP.

LOOP AT IT_VN1LAPP INTO WA_VN1LAPP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN1LAPP-HAUST, sy-vline,
  WA_VN1LAPP-MENGE, sy-vline,
  WA_VN1LAPP-ERBOE, sy-vline,
  WA_VN1LAPP-DATUM, sy-vline,
  WA_VN1LAPP-ZEIT, sy-vline,
  WA_VN1LAPP-KZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN1LAPP 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_VN1LAPP 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_VN1LAPP INTO WA_VN1LAPP.


*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_VN1LAPP-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1LAPP-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NRN1LAPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1LAPP-NRN1LAPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1LAPP-NRN1LAPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRAPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1LAPP-LNRAPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1LAPP-LNRAPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1LAPP-LEIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1LAPP-LEIST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HAUST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1LAPP-HAUST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1LAPP-HAUST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERBOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1LAPP-ERBOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1LAPP-ERBOE.
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_VN1LAPP_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
NRN1LAPP TYPE STRING,
LNRAPP TYPE STRING,
LEIST TYPE STRING,
HAUST TYPE STRING,
MENGE TYPE STRING,
ERBOE TYPE STRING,
DATUM TYPE STRING,
ZEIT TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN1LAPP_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_VN1LAPP_STR-MANDT sy-vline 
WA_VN1LAPP_STR-EINRI sy-vline 
WA_VN1LAPP_STR-NRN1LAPP sy-vline 
WA_VN1LAPP_STR-LNRAPP sy-vline 
WA_VN1LAPP_STR-LEIST sy-vline 
WA_VN1LAPP_STR-HAUST sy-vline 
WA_VN1LAPP_STR-MENGE sy-vline 
WA_VN1LAPP_STR-ERBOE sy-vline 
WA_VN1LAPP_STR-DATUM sy-vline 
WA_VN1LAPP_STR-ZEIT sy-vline 
WA_VN1LAPP_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.