ABAP Select data from SAP table DFKKCFCVS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKCFCVS
*  INTO TABLE @DATA(IT_DFKKCFCVS2).
*--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_DFKKCFCVS INDEX 1 INTO DATA(WA_DFKKCFCVS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKCFCVS>-MANDT = 1.
<DFKKCFCVS>-RUNID = 1.
<DFKKCFCVS>-NRZAS = 1.
<DFKKCFCVS>-PAYNR = 1.
<DFKKCFCVS>-EXTPY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKCFCVS-CCODE, sy-vline,
  WA_DFKKCFCVS-SELT1, sy-vline,
  WA_DFKKCFCVS-BETRZ, sy-vline,
  WA_DFKKCFCVS-SELW1, sy-vline,
  WA_DFKKCFCVS-WAERS, sy-vline,
  WA_DFKKCFCVS-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKCFCVS 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_DFKKCFCVS 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_DFKKCFCVS INTO WA_DFKKCFCVS.


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

*Conversion exit ALPHA, internal->external for field OFFSETBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCFCVS-OFFSETBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCFCVS-OFFSETBL.
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_DFKKCFCVS_STR, 
MANDT TYPE STRING,
RUNID TYPE STRING,
NRZAS TYPE STRING,
PAYNR TYPE STRING,
EXTPY TYPE STRING,
CCODE TYPE STRING,
SELT1 TYPE STRING,
BETRZ TYPE STRING,
SELW1 TYPE STRING,
WAERS TYPE STRING,
BUDAT TYPE STRING,
TXTVW TYPE STRING,
PFDAT TYPE STRING,
SIMUL TYPE STRING,
OFFSETBL TYPE STRING,
STATE TYPE STRING,
LOCK_USER TYPE STRING,
LOCK_LIMIT TYPE STRING,
WORKSTATE TYPE STRING,
RESUBMIT_DATE TYPE STRING,
WF_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKCFCVS_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_DFKKCFCVS_STR-MANDT sy-vline 
WA_DFKKCFCVS_STR-RUNID sy-vline 
WA_DFKKCFCVS_STR-NRZAS sy-vline 
WA_DFKKCFCVS_STR-PAYNR sy-vline 
WA_DFKKCFCVS_STR-EXTPY sy-vline 
WA_DFKKCFCVS_STR-CCODE sy-vline 
WA_DFKKCFCVS_STR-SELT1 sy-vline 
WA_DFKKCFCVS_STR-BETRZ sy-vline 
WA_DFKKCFCVS_STR-SELW1 sy-vline 
WA_DFKKCFCVS_STR-WAERS sy-vline 
WA_DFKKCFCVS_STR-BUDAT sy-vline 
WA_DFKKCFCVS_STR-TXTVW sy-vline 
WA_DFKKCFCVS_STR-PFDAT sy-vline 
WA_DFKKCFCVS_STR-SIMUL sy-vline 
WA_DFKKCFCVS_STR-OFFSETBL sy-vline 
WA_DFKKCFCVS_STR-STATE sy-vline 
WA_DFKKCFCVS_STR-LOCK_USER sy-vline 
WA_DFKKCFCVS_STR-LOCK_LIMIT sy-vline 
WA_DFKKCFCVS_STR-WORKSTATE sy-vline 
WA_DFKKCFCVS_STR-RESUBMIT_DATE sy-vline 
WA_DFKKCFCVS_STR-WF_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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