ABAP Select data from SAP table DFKKAVK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKAVK
*  INTO TABLE @DATA(IT_DFKKAVK2).
*--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_DFKKAVK INDEX 1 INTO DATA(WA_DFKKAVK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKAVK>-MANDT = 1.
<DFKKAVK>-AVKEY = 1.
<DFKKAVK>-XINKA = 1.
<DFKKAVK>-XINKU = 1.
<DFKKAVK>-GPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKAVK-VKONT, sy-vline,
  WA_DFKKAVK-WAERS, sy-vline,
  WA_DFKKAVK-SELT1, sy-vline,
  WA_DFKKAVK-STAAV, sy-vline,
  WA_DFKKAVK-TOTAM, sy-vline,
  WA_DFKKAVK-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKAVK 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_DFKKAVK 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_DFKKAVK INTO WA_DFKKAVK.


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

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

*Conversion exit ALPHA, internal->external for field APBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKAVK-APBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKAVK-APBEL.
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_DFKKAVK_STR, 
MANDT TYPE STRING,
AVKEY TYPE STRING,
XINKA TYPE STRING,
XINKU TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
WAERS TYPE STRING,
SELT1 TYPE STRING,
STAAV TYPE STRING,
TOTAM TYPE STRING,
BUKRS TYPE STRING,
AVDAT TYPE STRING,
APPLK TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,
APDAT TYPE STRING,
APTIM TYPE STRING,
APNAM TYPE STRING,
APBEL TYPE STRING,
XBDIR TYPE STRING,
VALTO TYPE STRING,
PYTYP TYPE STRING,
XFCCA TYPE STRING,
XLOCKBOXA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKAVK_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_DFKKAVK_STR-MANDT sy-vline 
WA_DFKKAVK_STR-AVKEY sy-vline 
WA_DFKKAVK_STR-XINKA sy-vline 
WA_DFKKAVK_STR-XINKU sy-vline 
WA_DFKKAVK_STR-GPART sy-vline 
WA_DFKKAVK_STR-VKONT sy-vline 
WA_DFKKAVK_STR-WAERS sy-vline 
WA_DFKKAVK_STR-SELT1 sy-vline 
WA_DFKKAVK_STR-STAAV sy-vline 
WA_DFKKAVK_STR-TOTAM sy-vline 
WA_DFKKAVK_STR-BUKRS sy-vline 
WA_DFKKAVK_STR-AVDAT sy-vline 
WA_DFKKAVK_STR-APPLK sy-vline 
WA_DFKKAVK_STR-ERDAT sy-vline 
WA_DFKKAVK_STR-ERTIM sy-vline 
WA_DFKKAVK_STR-ERNAM sy-vline 
WA_DFKKAVK_STR-AEDAT sy-vline 
WA_DFKKAVK_STR-AETIM sy-vline 
WA_DFKKAVK_STR-AENAM sy-vline 
WA_DFKKAVK_STR-APDAT sy-vline 
WA_DFKKAVK_STR-APTIM sy-vline 
WA_DFKKAVK_STR-APNAM sy-vline 
WA_DFKKAVK_STR-APBEL sy-vline 
WA_DFKKAVK_STR-XBDIR sy-vline 
WA_DFKKAVK_STR-VALTO sy-vline 
WA_DFKKAVK_STR-PYTYP sy-vline 
WA_DFKKAVK_STR-XFCCA sy-vline 
WA_DFKKAVK_STR-XLOCKBOXA sy-vline      INTO ld_text SEPARATED BY SPACE.

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