ABAP Select data from SAP table REVN_VN001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REVN_VN001 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 REVN_VN001. 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 REVN_VN001 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_REVN_VN001 TYPE STANDARD TABLE OF REVN_VN001,
      WA_REVN_VN001 TYPE REVN_VN001,
      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: <REVN_VN001> TYPE REVN_VN001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REVN_VN001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REVN_VN001
  INTO TABLE IT_REVN_VN001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REVN_VN001
*  INTO TABLE @DATA(IT_REVN_VN0012).
*--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_REVN_VN001 INDEX 1 INTO DATA(WA_REVN_VN0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REVN_VN001 ASSIGNING <REVN_VN001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REVN_VN001>-MANDT = 1.
<REVN_VN001>-INTRENO_VN = 1.
<REVN_VN001>-DOKART = 1.
<REVN_VN001>-XDOKART = 1.
<REVN_VN001>-PARTNR = 1.

ENDLOOP.

LOOP AT IT_REVN_VN001 INTO WA_REVN_VN001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REVN_VN001-KATASTERAMT, sy-vline,
  WA_REVN_VN001-VNACHWNR, sy-vline,
  WA_REVN_VN001-BESTAND_NEU, sy-vline,
  WA_REVN_VN001-DATUM, sy-vline,
  WA_REVN_VN001-FLAECHE_VD, sy-vline,
  WA_REVN_VN001-FEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REVN_VN001 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_REVN_VN001 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_REVN_VN001 INTO WA_REVN_VN001.


*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 PARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVN_VN001-PARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVN_VN001-PARTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field FEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REVN_VN001-FEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVN_VN001-FEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FLUR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVN_VN001-FLUR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVN_VN001-FLUR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field FEINS_KAT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REVN_VN001-FEINS_KAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVN_VN001-FEINS_KAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EINHEIT_NA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REVN_VN001-EINHEIT_NA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVN_VN001-EINHEIT_NA.
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_REVN_VN001_STR, 
MANDT TYPE STRING,
INTRENO_VN TYPE STRING,
DOKART TYPE STRING,
XDOKART TYPE STRING,
PARTNR TYPE STRING,
KATASTERAMT TYPE STRING,
VNACHWNR TYPE STRING,
BESTAND_NEU TYPE STRING,
DATUM TYPE STRING,
FLAECHE_VD TYPE STRING,
FEINS TYPE STRING,
VNART TYPE STRING,
VNARTBEZ TYPE STRING,
DATUM_KAT TYPE STRING,
INTRENO_FL TYPE STRING,
LAND1 TYPE STRING,
LANDX TYPE STRING,
BUNDESLAND TYPE STRING,
BEZEI TYPE STRING,
GEMARKUNG TYPE STRING,
XGEMARK TYPE STRING,
FLUR TYPE STRING,
FLURSTUECK TYPE STRING,
KREIS TYPE STRING,
XKREIS TYPE STRING,
GEMEINDE TYPE STRING,
XGEMEINDE TYPE STRING,
FLAECHE_KAT TYPE STRING,
FEINS_KAT TYPE STRING,
FLAECHE_NA TYPE STRING,
EINHEIT_NA TYPE STRING,
CLASSIFICATION TYPE STRING,
XNART_KAT TYPE STRING,
BODENKLASSE TYPE STRING,
ZUSTANDSSTUFE TYPE STRING,
BODENART TYPE STRING,
EMZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REVN_VN001_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_REVN_VN001_STR-MANDT sy-vline 
WA_REVN_VN001_STR-INTRENO_VN sy-vline 
WA_REVN_VN001_STR-DOKART sy-vline 
WA_REVN_VN001_STR-XDOKART sy-vline 
WA_REVN_VN001_STR-PARTNR sy-vline 
WA_REVN_VN001_STR-KATASTERAMT sy-vline 
WA_REVN_VN001_STR-VNACHWNR sy-vline 
WA_REVN_VN001_STR-BESTAND_NEU sy-vline 
WA_REVN_VN001_STR-DATUM sy-vline 
WA_REVN_VN001_STR-FLAECHE_VD sy-vline 
WA_REVN_VN001_STR-FEINS sy-vline 
WA_REVN_VN001_STR-VNART sy-vline 
WA_REVN_VN001_STR-VNARTBEZ sy-vline 
WA_REVN_VN001_STR-DATUM_KAT sy-vline 
WA_REVN_VN001_STR-INTRENO_FL sy-vline 
WA_REVN_VN001_STR-LAND1 sy-vline 
WA_REVN_VN001_STR-LANDX sy-vline 
WA_REVN_VN001_STR-BUNDESLAND sy-vline 
WA_REVN_VN001_STR-BEZEI sy-vline 
WA_REVN_VN001_STR-GEMARKUNG sy-vline 
WA_REVN_VN001_STR-XGEMARK sy-vline 
WA_REVN_VN001_STR-FLUR sy-vline 
WA_REVN_VN001_STR-FLURSTUECK sy-vline 
WA_REVN_VN001_STR-KREIS sy-vline 
WA_REVN_VN001_STR-XKREIS sy-vline 
WA_REVN_VN001_STR-GEMEINDE sy-vline 
WA_REVN_VN001_STR-XGEMEINDE sy-vline 
WA_REVN_VN001_STR-FLAECHE_KAT sy-vline 
WA_REVN_VN001_STR-FEINS_KAT sy-vline 
WA_REVN_VN001_STR-FLAECHE_NA sy-vline 
WA_REVN_VN001_STR-EINHEIT_NA sy-vline 
WA_REVN_VN001_STR-CLASSIFICATION sy-vline 
WA_REVN_VN001_STR-XNART_KAT sy-vline 
WA_REVN_VN001_STR-BODENKLASSE sy-vline 
WA_REVN_VN001_STR-ZUSTANDSSTUFE sy-vline 
WA_REVN_VN001_STR-BODENART sy-vline 
WA_REVN_VN001_STR-EMZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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