ABAP Select data from SAP table FIKRV_CUSTVAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIKRV_CUSTVAT
*  INTO TABLE @DATA(IT_FIKRV_CUSTVAT2).
*--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_FIKRV_CUSTVAT INDEX 1 INTO DATA(WA_FIKRV_CUSTVAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIKRV_CUSTVAT>-MANDT = 1.
<FIKRV_CUSTVAT>-KUNNR = 1.
<FIKRV_CUSTVAT>-DATAB = 1.
<FIKRV_CUSTVAT>-STCD1 = 1.
<FIKRV_CUSTVAT>-STCD2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIKRV_CUSTVAT-GESTYP, sy-vline,
  WA_FIKRV_CUSTVAT-INDTYP, sy-vline,
  WA_FIKRV_CUSTVAT-REPRES, sy-vline,
  WA_FIKRV_CUSTVAT-NAME1, sy-vline,
  WA_FIKRV_CUSTVAT-ORT01, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_FIKRV_CUSTVAT 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_FIKRV_CUSTVAT 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_FIKRV_CUSTVAT INTO WA_FIKRV_CUSTVAT.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIKRV_CUSTVAT-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIKRV_CUSTVAT-KUNNR.
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_FIKRV_CUSTVAT_STR, 
MANDT TYPE STRING,
KUNNR TYPE STRING,
DATAB TYPE STRING,
STCD1 TYPE STRING,
STCD2 TYPE STRING,
GESTYP TYPE STRING,
INDTYP TYPE STRING,
REPRES TYPE STRING,
NAME1 TYPE STRING,
ORT01 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIKRV_CUSTVAT_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_FIKRV_CUSTVAT_STR-MANDT sy-vline 
WA_FIKRV_CUSTVAT_STR-KUNNR sy-vline 
WA_FIKRV_CUSTVAT_STR-DATAB sy-vline 
WA_FIKRV_CUSTVAT_STR-STCD1 sy-vline 
WA_FIKRV_CUSTVAT_STR-STCD2 sy-vline 
WA_FIKRV_CUSTVAT_STR-GESTYP sy-vline 
WA_FIKRV_CUSTVAT_STR-INDTYP sy-vline 
WA_FIKRV_CUSTVAT_STR-REPRES sy-vline 
WA_FIKRV_CUSTVAT_STR-NAME1 sy-vline 
WA_FIKRV_CUSTVAT_STR-ORT01 sy-vline      INTO ld_text SEPARATED BY SPACE.

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