ABAP Select data from SAP table VKKKCUSTKD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKKCUSTKD
*  INTO TABLE @DATA(IT_VKKKCUSTKD2).
*--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_VKKKCUSTKD INDEX 1 INTO DATA(WA_VKKKCUSTKD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKKCUSTKD>-ANZEP = 1.
<VKKKCUSTKD>-BLART = 1.
<VKKKCUSTKD>-BLTYP = 1.
<VKKKCUSTKD>-ABRZO = 1.
<VKKKCUSTKD>-ABRZU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKKCUSTKD-FREQZ, sy-vline,
  WA_VKKKCUSTKD-GBETR, sy-vline,
  WA_VKKKCUSTKD-GBISD, sy-vline,
  WA_VKKKCUSTKD-BUKNZ, sy-vline,
  WA_VKKKCUSTKD-OPBUK, sy-vline,
  WA_VKKKCUSTKD-HFAEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKKCUSTKD 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_VKKKCUSTKD 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_VKKKCUSTKD INTO WA_VKKKCUSTKD.


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

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

*Conversion exit ALPHA, internal->external for field REFBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKKCUSTKD-REFBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKKCUSTKD-REFBL.
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_VKKKCUSTKD_STR, 
ANZEP TYPE STRING,
BLART TYPE STRING,
BLTYP TYPE STRING,
ABRZO TYPE STRING,
ABRZU TYPE STRING,
FREQZ TYPE STRING,
GBETR TYPE STRING,
GBISD TYPE STRING,
BUKNZ TYPE STRING,
OPBUK TYPE STRING,
HFAEL TYPE STRING,
KZSIA TYPE STRING,
KZSIP TYPE STRING,
FAEDN TYPE STRING,
RBART TYPE STRING,
RBZNR TYPE STRING,
RVTNR TYPE STRING,
SBHSL TYPE STRING,
TCODE TYPE STRING,
VALUT TYPE STRING,
WAERS TYPE STRING,
BUDAT TYPE STRING,
VBUND TYPE STRING,
REFGF TYPE STRING,
REFBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKKKCUSTKD_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_VKKKCUSTKD_STR-ANZEP sy-vline 
WA_VKKKCUSTKD_STR-BLART sy-vline 
WA_VKKKCUSTKD_STR-BLTYP sy-vline 
WA_VKKKCUSTKD_STR-ABRZO sy-vline 
WA_VKKKCUSTKD_STR-ABRZU sy-vline 
WA_VKKKCUSTKD_STR-FREQZ sy-vline 
WA_VKKKCUSTKD_STR-GBETR sy-vline 
WA_VKKKCUSTKD_STR-GBISD sy-vline 
WA_VKKKCUSTKD_STR-BUKNZ sy-vline 
WA_VKKKCUSTKD_STR-OPBUK sy-vline 
WA_VKKKCUSTKD_STR-HFAEL sy-vline 
WA_VKKKCUSTKD_STR-KZSIA sy-vline 
WA_VKKKCUSTKD_STR-KZSIP sy-vline 
WA_VKKKCUSTKD_STR-FAEDN sy-vline 
WA_VKKKCUSTKD_STR-RBART sy-vline 
WA_VKKKCUSTKD_STR-RBZNR sy-vline 
WA_VKKKCUSTKD_STR-RVTNR sy-vline 
WA_VKKKCUSTKD_STR-SBHSL sy-vline 
WA_VKKKCUSTKD_STR-TCODE sy-vline 
WA_VKKKCUSTKD_STR-VALUT sy-vline 
WA_VKKKCUSTKD_STR-WAERS sy-vline 
WA_VKKKCUSTKD_STR-BUDAT sy-vline 
WA_VKKKCUSTKD_STR-VBUND sy-vline 
WA_VKKKCUSTKD_STR-REFGF sy-vline 
WA_VKKKCUSTKD_STR-REFBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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