ABAP Select data from SAP table WLF_LIST_OUTPUT_FI_KRED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLF_LIST_OUTPUT_FI_KRED
*  INTO TABLE @DATA(IT_WLF_LIST_OUTPUT_FI_KRED2).
*--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_WLF_LIST_OUTPUT_FI_KRED INDEX 1 INTO DATA(WA_WLF_LIST_OUTPUT_FI_KRED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLF_LIST_OUTPUT_FI_KRED>-BUKRS = 1.
<WLF_LIST_OUTPUT_FI_KRED>-BELNR = 1.
<WLF_LIST_OUTPUT_FI_KRED>-GJAHR = 1.
<WLF_LIST_OUTPUT_FI_KRED>-BLART = 1.
<WLF_LIST_OUTPUT_FI_KRED>-BLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLF_LIST_OUTPUT_FI_KRED-BUDAT, sy-vline,
  WA_WLF_LIST_OUTPUT_FI_KRED-MONAT, sy-vline,
  WA_WLF_LIST_OUTPUT_FI_KRED-XBLNR, sy-vline,
  WA_WLF_LIST_OUTPUT_FI_KRED-CPUDT, sy-vline,
  WA_WLF_LIST_OUTPUT_FI_KRED-USNAM, sy-vline,
  WA_WLF_LIST_OUTPUT_FI_KRED-BKTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLF_LIST_OUTPUT_FI_KRED 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_WLF_LIST_OUTPUT_FI_KRED 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_WLF_LIST_OUTPUT_FI_KRED INTO WA_WLF_LIST_OUTPUT_FI_KRED.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WLF_LIST_OUTPUT_FI_KRED-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_LIST_OUTPUT_FI_KRED-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WLF_LIST_OUTPUT_FI_KRED-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_LIST_OUTPUT_FI_KRED-AUGBL.
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_WLF_LIST_OUTPUT_FI_KRED_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
XBLNR TYPE STRING,
CPUDT TYPE STRING,
USNAM TYPE STRING,
BKTXT TYPE STRING,
WAERS TYPE STRING,
HWAER TYPE STRING,
LIFNR TYPE STRING,
LIFNR_NAME TYPE STRING,
BUZEI TYPE STRING,
ZUONR TYPE STRING,
KIDNO TYPE STRING,
AUGDT TYPE STRING,
AUGBL TYPE STRING,
MWSKZ TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
ZTERM TYPE STRING,
ZBD1T TYPE STRING,
ZBD2T TYPE STRING,
ZBD3T TYPE STRING,
ZBD1P TYPE STRING,
ZBD2P TYPE STRING,
SKFBT TYPE STRING,
SKNTO TYPE STRING,
WSKTO TYPE STRING,
ZLSCH TYPE STRING,
ZLSPR TYPE STRING,
SHKZG TYPE STRING,
BSCHL TYPE STRING,
KOART TYPE STRING,
UMSKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLF_LIST_OUTPUT_FI_KRED_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_WLF_LIST_OUTPUT_FI_KRED_STR-BUKRS sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BELNR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-GJAHR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BLART sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BLDAT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BUDAT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-MONAT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-XBLNR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-CPUDT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-USNAM sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BKTXT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-WAERS sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-HWAER sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-LIFNR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-LIFNR_NAME sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BUZEI sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZUONR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-KIDNO sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-AUGDT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-AUGBL sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-MWSKZ sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-DMBTR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-WRBTR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZTERM sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZBD1T sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZBD2T sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZBD3T sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZBD1P sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZBD2P sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-SKFBT sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-SKNTO sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-WSKTO sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZLSCH sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-ZLSPR sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-SHKZG sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-BSCHL sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-KOART sy-vline 
WA_WLF_LIST_OUTPUT_FI_KRED_STR-UMSKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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