ABAP Select data from SAP table DFKKRK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKRK
*  INTO TABLE @DATA(IT_DFKKRK2).
*--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_DFKKRK INDEX 1 INTO DATA(WA_DFKKRK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKRK>-MANDT = 1.
<DFKKRK>-KEYR1 = 1.
<DFKKRK>-KEYR2 = 1.
<DFKKRK>-APPLK = 1.
<DFKKRK>-HERKF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKRK-FIKEY, sy-vline,
  WA_DFKKRK-RLSKO, sy-vline,
  WA_DFKKRK-GEAKO, sy-vline,
  WA_DFKKRK-GEEKO, sy-vline,
  WA_DFKKRK-BUKRS, sy-vline,
  WA_DFKKRK-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKRK 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_DFKKRK 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_DFKKRK INTO WA_DFKKRK.


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

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

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

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

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_DFKKRK-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKRK-KURSF.
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_DFKKRK_STR, 
MANDT TYPE STRING,
KEYR1 TYPE STRING,
KEYR2 TYPE STRING,
APPLK TYPE STRING,
HERKF TYPE STRING,
FIKEY TYPE STRING,
RLSKO TYPE STRING,
GEAKO TYPE STRING,
GEEKO TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
PRCTR TYPE STRING,
BLART TYPE STRING,
WAERS TYPE STRING,
KURSF TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
VALUT TYPE STRING,
XEIPH TYPE STRING,
AUGRD TYPE STRING,
SELT1 TYPE STRING,
ANZPO TYPE STRING,
SUMMS TYPE STRING,
SUMMH TYPE STRING,
SUMWA TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
STARS TYPE STRING,
XSTEB TYPE STRING,
XRLSB TYPE STRING,
SKZB1 TYPE STRING,
SKZB2 TYPE STRING,
SKZV1 TYPE STRING,
SKZV2 TYPE STRING,
BANKL TYPE STRING,
BANKK TYPE STRING,
BANKN TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
JOBNAME TYPE STRING,
XCALCGEB TYPE STRING,
XACCEPTCHARGES TYPE STRING,
FLAGS TYPE STRING,
RLMOD TYPE STRING,
KSUMS TYPE STRING,
KSUMH TYPE STRING,
KSUMP TYPE STRING,
XERWR TYPE STRING,
RLGRD TYPE STRING,
XRTPS TYPE STRING,
TAX_COUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKRK_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_DFKKRK_STR-MANDT sy-vline 
WA_DFKKRK_STR-KEYR1 sy-vline 
WA_DFKKRK_STR-KEYR2 sy-vline 
WA_DFKKRK_STR-APPLK sy-vline 
WA_DFKKRK_STR-HERKF sy-vline 
WA_DFKKRK_STR-FIKEY sy-vline 
WA_DFKKRK_STR-RLSKO sy-vline 
WA_DFKKRK_STR-GEAKO sy-vline 
WA_DFKKRK_STR-GEEKO sy-vline 
WA_DFKKRK_STR-BUKRS sy-vline 
WA_DFKKRK_STR-GSBER sy-vline 
WA_DFKKRK_STR-PRCTR sy-vline 
WA_DFKKRK_STR-BLART sy-vline 
WA_DFKKRK_STR-WAERS sy-vline 
WA_DFKKRK_STR-KURSF sy-vline 
WA_DFKKRK_STR-BUDAT sy-vline 
WA_DFKKRK_STR-BLDAT sy-vline 
WA_DFKKRK_STR-VALUT sy-vline 
WA_DFKKRK_STR-XEIPH sy-vline 
WA_DFKKRK_STR-AUGRD sy-vline 
WA_DFKKRK_STR-SELT1 sy-vline 
WA_DFKKRK_STR-ANZPO sy-vline 
WA_DFKKRK_STR-SUMMS sy-vline 
WA_DFKKRK_STR-SUMMH sy-vline 
WA_DFKKRK_STR-SUMWA sy-vline 
WA_DFKKRK_STR-ERNAM sy-vline 
WA_DFKKRK_STR-ERDAT sy-vline 
WA_DFKKRK_STR-ERTIM sy-vline 
WA_DFKKRK_STR-AENAM sy-vline 
WA_DFKKRK_STR-AEDAT sy-vline 
WA_DFKKRK_STR-AETIM sy-vline 
WA_DFKKRK_STR-STARS sy-vline 
WA_DFKKRK_STR-XSTEB sy-vline 
WA_DFKKRK_STR-XRLSB sy-vline 
WA_DFKKRK_STR-SKZB1 sy-vline 
WA_DFKKRK_STR-SKZB2 sy-vline 
WA_DFKKRK_STR-SKZV1 sy-vline 
WA_DFKKRK_STR-SKZV2 sy-vline 
WA_DFKKRK_STR-BANKL sy-vline 
WA_DFKKRK_STR-BANKK sy-vline 
WA_DFKKRK_STR-BANKN sy-vline 
WA_DFKKRK_STR-HBKID sy-vline 
WA_DFKKRK_STR-HKTID sy-vline 
WA_DFKKRK_STR-JOBNAME sy-vline 
WA_DFKKRK_STR-XCALCGEB sy-vline 
WA_DFKKRK_STR-XACCEPTCHARGES sy-vline 
WA_DFKKRK_STR-FLAGS sy-vline 
WA_DFKKRK_STR-RLMOD sy-vline 
WA_DFKKRK_STR-KSUMS sy-vline 
WA_DFKKRK_STR-KSUMH sy-vline 
WA_DFKKRK_STR-KSUMP sy-vline 
WA_DFKKRK_STR-XERWR sy-vline 
WA_DFKKRK_STR-RLGRD sy-vline 
WA_DFKKRK_STR-XRTPS sy-vline 
WA_DFKKRK_STR-TAX_COUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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