ABAP Select data from SAP table RFVIMKB01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVIMKB01 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 RFVIMKB01. 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 RFVIMKB01 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_RFVIMKB01 TYPE STANDARD TABLE OF RFVIMKB01,
      WA_RFVIMKB01 TYPE RFVIMKB01,
      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: <RFVIMKB01> TYPE RFVIMKB01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVIMKB01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVIMKB01
  INTO TABLE IT_RFVIMKB01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIMKB01
*  INTO TABLE @DATA(IT_RFVIMKB012).
*--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_RFVIMKB01 INDEX 1 INTO DATA(WA_RFVIMKB012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVIMKB01 ASSIGNING <RFVIMKB01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIMKB01>-BUKRS = 1.
<RFVIMKB01>-KUNNR = 1.
<RFVIMKB01>-UMSKS = 1.
<RFVIMKB01>-UMSKZ = 1.
<RFVIMKB01>-AUGDT = 1.

ENDLOOP.

LOOP AT IT_RFVIMKB01 INTO WA_RFVIMKB01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIMKB01-AUGBL, sy-vline,
  WA_RFVIMKB01-ZUONR, sy-vline,
  WA_RFVIMKB01-GJAHR, sy-vline,
  WA_RFVIMKB01-BELNR, sy-vline,
  WA_RFVIMKB01-BUZEI, sy-vline,
  WA_RFVIMKB01-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIMKB01 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_RFVIMKB01 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_RFVIMKB01 INTO WA_RFVIMKB01.


*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_RFVIMKB01-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIMKB01-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIMKB01-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIMKB01-AUGBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFVIMKB01-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIMKB01-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIMKB01-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIMKB01-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIMKB01-VERTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIMKB01-VERTN.
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_RFVIMKB01_STR, 
BUKRS TYPE STRING,
KUNNR TYPE STRING,
UMSKS TYPE STRING,
UMSKZ TYPE STRING,
AUGDT TYPE STRING,
AUGBL TYPE STRING,
ZUONR TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BUDAT TYPE STRING,
BLART TYPE STRING,
BSCHL TYPE STRING,
ZUMSK TYPE STRING,
SHKZG TYPE STRING,
GSBER TYPE STRING,
VERTN TYPE STRING,
VBEWA TYPE STRING,
SMVART TYPE STRING,
DMIBEG TYPE STRING,
XREF1 TYPE STRING,
VERTT TYPE STRING,
WAERS TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
SGTXT TYPE STRING,
DMBTRS TYPE STRING,
DMBTRH TYPE STRING,
EUROS TYPE STRING,
EUROH TYPE STRING,
FAELPER TYPE STRING,
BKWAERS TYPE STRING,
SWAERS TYPE STRING,
ZFBDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVIMKB01_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_RFVIMKB01_STR-BUKRS sy-vline 
WA_RFVIMKB01_STR-KUNNR sy-vline 
WA_RFVIMKB01_STR-UMSKS sy-vline 
WA_RFVIMKB01_STR-UMSKZ sy-vline 
WA_RFVIMKB01_STR-AUGDT sy-vline 
WA_RFVIMKB01_STR-AUGBL sy-vline 
WA_RFVIMKB01_STR-ZUONR sy-vline 
WA_RFVIMKB01_STR-GJAHR sy-vline 
WA_RFVIMKB01_STR-BELNR sy-vline 
WA_RFVIMKB01_STR-BUZEI sy-vline 
WA_RFVIMKB01_STR-BUDAT sy-vline 
WA_RFVIMKB01_STR-BLART sy-vline 
WA_RFVIMKB01_STR-BSCHL sy-vline 
WA_RFVIMKB01_STR-ZUMSK sy-vline 
WA_RFVIMKB01_STR-SHKZG sy-vline 
WA_RFVIMKB01_STR-GSBER sy-vline 
WA_RFVIMKB01_STR-VERTN sy-vline 
WA_RFVIMKB01_STR-VBEWA sy-vline 
WA_RFVIMKB01_STR-SMVART sy-vline 
WA_RFVIMKB01_STR-DMIBEG sy-vline 
WA_RFVIMKB01_STR-XREF1 sy-vline 
WA_RFVIMKB01_STR-VERTT sy-vline 
WA_RFVIMKB01_STR-WAERS sy-vline 
WA_RFVIMKB01_STR-DMBTR sy-vline 
WA_RFVIMKB01_STR-WRBTR sy-vline 
WA_RFVIMKB01_STR-SGTXT sy-vline 
WA_RFVIMKB01_STR-DMBTRS sy-vline 
WA_RFVIMKB01_STR-DMBTRH sy-vline 
WA_RFVIMKB01_STR-EUROS sy-vline 
WA_RFVIMKB01_STR-EUROH sy-vline 
WA_RFVIMKB01_STR-FAELPER sy-vline 
WA_RFVIMKB01_STR-BKWAERS sy-vline 
WA_RFVIMKB01_STR-SWAERS sy-vline 
WA_RFVIMKB01_STR-ZFBDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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