ABAP Select data from SAP table FKK_MKKRET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKK_MKKRET
*  INTO TABLE @DATA(IT_FKK_MKKRET2).
*--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_FKK_MKKRET INDEX 1 INTO DATA(WA_FKK_MKKRET2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKK_MKKRET-APPLK, sy-vline,
  WA_FKK_MKKRET-HERKF, sy-vline,
  WA_FKK_MKKRET-FIKEY, sy-vline,
  WA_FKK_MKKRET-RLSKO, sy-vline,
  WA_FKK_MKKRET-GEAKO, sy-vline,
  WA_FKK_MKKRET-GEEKO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKK_MKKRET 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_FKK_MKKRET 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_FKK_MKKRET INTO WA_FKK_MKKRET.


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

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

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

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

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

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