ABAP Select data from SAP table RFVEP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVEP
*  INTO TABLE @DATA(IT_RFVEP2).
*--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_RFVEP INDEX 1 INTO DATA(WA_RFVEP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVEP>-BUKRS = 1.
<RFVEP>-BELNR = 1.
<RFVEP>-SABWKZ = 1.
<RFVEP>-GJAHR = 1.
<RFVEP>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVEP-ZBTBEZ, sy-vline,
  WA_RFVEP-WRBTR, sy-vline,
  WA_RFVEP-KUNNR, sy-vline,
  WA_RFVEP-WAERS, sy-vline,
  WA_RFVEP-VERTN, sy-vline,
  WA_RFVEP-UMSKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVEP 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_RFVEP 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_RFVEP INTO WA_RFVEP.


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

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

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

*Conversion exit ALPHA, internal->external for field VERTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVEP-VERTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVEP-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_RFVEP_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
SABWKZ TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
ZBTBEZ TYPE STRING,
WRBTR TYPE STRING,
KUNNR TYPE STRING,
WAERS TYPE STRING,
VERTN TYPE STRING,
UMSKZ TYPE STRING,
XBEWART TYPE STRING,
SBEWART TYPE STRING,
BUDAT TYPE STRING,
ZLSCH TYPE STRING,
ZLSPR TYPE STRING,
MWSKZ TYPE STRING,
MABER TYPE STRING,
MANSP TYPE STRING,
ZFBDT TYPE STRING,
TXJCD TYPE STRING,
BUKRS_NEW TYPE STRING,
HBKID TYPE STRING,
BVTYP TYPE STRING,
AV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVEP_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_RFVEP_STR-BUKRS sy-vline 
WA_RFVEP_STR-BELNR sy-vline 
WA_RFVEP_STR-SABWKZ sy-vline 
WA_RFVEP_STR-GJAHR sy-vline 
WA_RFVEP_STR-BUZEI sy-vline 
WA_RFVEP_STR-ZBTBEZ sy-vline 
WA_RFVEP_STR-WRBTR sy-vline 
WA_RFVEP_STR-KUNNR sy-vline 
WA_RFVEP_STR-WAERS sy-vline 
WA_RFVEP_STR-VERTN sy-vline 
WA_RFVEP_STR-UMSKZ sy-vline 
WA_RFVEP_STR-XBEWART sy-vline 
WA_RFVEP_STR-SBEWART sy-vline 
WA_RFVEP_STR-BUDAT sy-vline 
WA_RFVEP_STR-ZLSCH sy-vline 
WA_RFVEP_STR-ZLSPR sy-vline 
WA_RFVEP_STR-MWSKZ sy-vline 
WA_RFVEP_STR-MABER sy-vline 
WA_RFVEP_STR-MANSP sy-vline 
WA_RFVEP_STR-ZFBDT sy-vline 
WA_RFVEP_STR-TXJCD sy-vline 
WA_RFVEP_STR-BUKRS_NEW sy-vline 
WA_RFVEP_STR-HBKID sy-vline 
WA_RFVEP_STR-BVTYP sy-vline 
WA_RFVEP_STR-AV sy-vline      INTO ld_text SEPARATED BY SPACE.

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