ABAP Select data from SAP table VN1ANF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VN1ANF 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 VN1ANF. 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 VN1ANF 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_VN1ANF TYPE STANDARD TABLE OF VN1ANF,
      WA_VN1ANF TYPE VN1ANF,
      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: <VN1ANF> TYPE VN1ANF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN1ANF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN1ANF
  INTO TABLE IT_VN1ANF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN1ANF
*  INTO TABLE @DATA(IT_VN1ANF2).
*--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_VN1ANF INDEX 1 INTO DATA(WA_VN1ANF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN1ANF ASSIGNING <VN1ANF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN1ANF>-MANDT = 1.
<VN1ANF>-EINRI = 1.
<VN1ANF>-ANFID = 1.
<VN1ANF>-ORGID = 1.
<VN1ANF>-ANFOE = 1.

ENDLOOP.

LOOP AT IT_VN1ANF INTO WA_VN1ANF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN1ANF-ANPOE, sy-vline,
  WA_VN1ANF-ANFTY, sy-vline,
  WA_VN1ANF-ANFNR, sy-vline,
  WA_VN1ANF-FALNR, sy-vline,
  WA_VN1ANF-ANSTAE, sy-vline,
  WA_VN1ANF-APRI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN1ANF 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_VN1ANF 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_VN1ANF INTO WA_VN1ANF.


*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_VN1ANF-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALDIA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-FALDIA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-FALDIA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-ORGFD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-ORGFD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PAPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1ANF-PAPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1ANF-PAPID.
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_VN1ANF_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
ANFID TYPE STRING,
ORGID TYPE STRING,
ANFOE TYPE STRING,
ANPOE TYPE STRING,
ANFTY TYPE STRING,
ANFNR TYPE STRING,
FALNR TYPE STRING,
ANSTAE TYPE STRING,
APRI TYPE STRING,
KANAM TYPE STRING,
KALTX TYPE STRING,
FALDIA TYPE STRING,
LFDDIA TYPE STRING,
FRAGE TYPE STRING,
FRLTX TYPE STRING,
SCHWKZ TYPE STRING,
SCHWO TYPE STRING,
LFDMEHR TYPE STRING,
TPAE TYPE STRING,
RCKRUF TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
BHANF TYPE STRING,
BHATX TYPE STRING,
PATNR TYPE STRING,
DITXT TYPE STRING,
DILTX TYPE STRING,
VBUND TYPE STRING,
MI TYPE STRING,
SM TYPE STRING,
KM TYPE STRING,
JOD TYPE STRING,
ANDERE TYPE STRING,
KGR TYPE STRING,
KGEW TYPE STRING,
RP TYPE STRING,
RPID TYPE STRING,
ORGFD TYPE STRING,
PAPID TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN1ANF_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_VN1ANF_STR-MANDT sy-vline 
WA_VN1ANF_STR-EINRI sy-vline 
WA_VN1ANF_STR-ANFID sy-vline 
WA_VN1ANF_STR-ORGID sy-vline 
WA_VN1ANF_STR-ANFOE sy-vline 
WA_VN1ANF_STR-ANPOE sy-vline 
WA_VN1ANF_STR-ANFTY sy-vline 
WA_VN1ANF_STR-ANFNR sy-vline 
WA_VN1ANF_STR-FALNR sy-vline 
WA_VN1ANF_STR-ANSTAE sy-vline 
WA_VN1ANF_STR-APRI sy-vline 
WA_VN1ANF_STR-KANAM sy-vline 
WA_VN1ANF_STR-KALTX sy-vline 
WA_VN1ANF_STR-FALDIA sy-vline 
WA_VN1ANF_STR-LFDDIA sy-vline 
WA_VN1ANF_STR-FRAGE sy-vline 
WA_VN1ANF_STR-FRLTX sy-vline 
WA_VN1ANF_STR-SCHWKZ sy-vline 
WA_VN1ANF_STR-SCHWO sy-vline 
WA_VN1ANF_STR-LFDMEHR sy-vline 
WA_VN1ANF_STR-TPAE sy-vline 
WA_VN1ANF_STR-RCKRUF sy-vline 
WA_VN1ANF_STR-DOKAR sy-vline 
WA_VN1ANF_STR-DOKNR sy-vline 
WA_VN1ANF_STR-DOKVR sy-vline 
WA_VN1ANF_STR-DOKTL sy-vline 
WA_VN1ANF_STR-ERDAT sy-vline 
WA_VN1ANF_STR-ERUSR sy-vline 
WA_VN1ANF_STR-UPDAT sy-vline 
WA_VN1ANF_STR-UPUSR sy-vline 
WA_VN1ANF_STR-STORN sy-vline 
WA_VN1ANF_STR-STUSR sy-vline 
WA_VN1ANF_STR-STDAT sy-vline 
WA_VN1ANF_STR-BHANF sy-vline 
WA_VN1ANF_STR-BHATX sy-vline 
WA_VN1ANF_STR-PATNR sy-vline 
WA_VN1ANF_STR-DITXT sy-vline 
WA_VN1ANF_STR-DILTX sy-vline 
WA_VN1ANF_STR-VBUND sy-vline 
WA_VN1ANF_STR-MI sy-vline 
WA_VN1ANF_STR-SM sy-vline 
WA_VN1ANF_STR-KM sy-vline 
WA_VN1ANF_STR-JOD sy-vline 
WA_VN1ANF_STR-ANDERE sy-vline 
WA_VN1ANF_STR-KGR sy-vline 
WA_VN1ANF_STR-KGEW sy-vline 
WA_VN1ANF_STR-RP sy-vline 
WA_VN1ANF_STR-RPID sy-vline 
WA_VN1ANF_STR-ORGFD sy-vline 
WA_VN1ANF_STR-PAPID sy-vline 
WA_VN1ANF_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.