ABAP Select data from SAP table BFKKRK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BFKKRK
*  INTO TABLE @DATA(IT_BFKKRK2).
*--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_BFKKRK INDEX 1 INTO DATA(WA_BFKKRK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BFKKRK>-STYPE = 1.
<BFKKRK>-TBNAM = 1.
<BFKKRK>-KEYR1 = 1.
<BFKKRK>-KEYR2 = 1.
<BFKKRK>-FIKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BFKKRK-RLSKO, sy-vline,
  WA_BFKKRK-BUKRS, sy-vline,
  WA_BFKKRK-GSBER, sy-vline,
  WA_BFKKRK-BLART, sy-vline,
  WA_BFKKRK-WAERS, sy-vline,
  WA_BFKKRK-KURSF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BFKKRK 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_BFKKRK 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_BFKKRK INTO WA_BFKKRK.


*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_BFKKRK-RLSKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BFKKRK-RLSKO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BFKKRK-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BFKKRK-PRCTR.
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_BFKKRK_STR, 
STYPE TYPE STRING,
TBNAM TYPE STRING,
KEYR1 TYPE STRING,
KEYR2 TYPE STRING,
FIKEY TYPE STRING,
RLSKO TYPE STRING,
BUKRS TYPE STRING,
GSBER 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,
XRLSD TYPE STRING,
XRLSK TYPE STRING,
XSTEB TYPE STRING,
XRLSB TYPE STRING,
BANKL TYPE STRING,
BANKK TYPE STRING,
BANKN TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
XCALCGEB TYPE STRING,
XACCEPTCHARGES TYPE STRING,
RLMOD TYPE STRING,
KSUMS TYPE STRING,
KSUMH TYPE STRING,
KSUMP TYPE STRING,
XERWR TYPE STRING,
PRCTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BFKKRK_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_BFKKRK_STR-STYPE sy-vline 
WA_BFKKRK_STR-TBNAM sy-vline 
WA_BFKKRK_STR-KEYR1 sy-vline 
WA_BFKKRK_STR-KEYR2 sy-vline 
WA_BFKKRK_STR-FIKEY sy-vline 
WA_BFKKRK_STR-RLSKO sy-vline 
WA_BFKKRK_STR-BUKRS sy-vline 
WA_BFKKRK_STR-GSBER sy-vline 
WA_BFKKRK_STR-BLART sy-vline 
WA_BFKKRK_STR-WAERS sy-vline 
WA_BFKKRK_STR-KURSF sy-vline 
WA_BFKKRK_STR-BUDAT sy-vline 
WA_BFKKRK_STR-BLDAT sy-vline 
WA_BFKKRK_STR-VALUT sy-vline 
WA_BFKKRK_STR-XEIPH sy-vline 
WA_BFKKRK_STR-AUGRD sy-vline 
WA_BFKKRK_STR-XRLSD sy-vline 
WA_BFKKRK_STR-XRLSK sy-vline 
WA_BFKKRK_STR-XSTEB sy-vline 
WA_BFKKRK_STR-XRLSB sy-vline 
WA_BFKKRK_STR-BANKL sy-vline 
WA_BFKKRK_STR-BANKK sy-vline 
WA_BFKKRK_STR-BANKN sy-vline 
WA_BFKKRK_STR-HBKID sy-vline 
WA_BFKKRK_STR-HKTID sy-vline 
WA_BFKKRK_STR-XCALCGEB sy-vline 
WA_BFKKRK_STR-XACCEPTCHARGES sy-vline 
WA_BFKKRK_STR-RLMOD sy-vline 
WA_BFKKRK_STR-KSUMS sy-vline 
WA_BFKKRK_STR-KSUMH sy-vline 
WA_BFKKRK_STR-KSUMP sy-vline 
WA_BFKKRK_STR-XERWR sy-vline 
WA_BFKKRK_STR-PRCTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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