ABAP Select data from SAP table FKKL8_HDR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKL8_HDR 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 FKKL8_HDR. 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 FKKL8_HDR 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_FKKL8_HDR TYPE STANDARD TABLE OF FKKL8_HDR,
      WA_FKKL8_HDR TYPE FKKL8_HDR,
      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: <FKKL8_HDR> TYPE FKKL8_HDR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FKKL8_HDR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FKKL8_HDR
  INTO TABLE IT_FKKL8_HDR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKL8_HDR
*  INTO TABLE @DATA(IT_FKKL8_HDR2).
*--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_FKKL8_HDR INDEX 1 INTO DATA(WA_FKKL8_HDR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FKKL8_HDR ASSIGNING <FKKL8_HDR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKL8_HDR>-OPBEL = 1.
<FKKL8_HDR>-BLART = 1.
<FKKL8_HDR>-HERKF = 1.
<FKKL8_HDR>-ERNAM = 1.
<FKKL8_HDR>-CPUDT = 1.

ENDLOOP.

LOOP AT IT_FKKL8_HDR INTO WA_FKKL8_HDR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKL8_HDR-CPUTM, sy-vline,
  WA_FKKL8_HDR-WAERS, sy-vline,
  WA_FKKL8_HDR-BLDAT, sy-vline,
  WA_FKKL8_HDR-BUDAT, sy-vline,
  WA_FKKL8_HDR-STBEL, sy-vline,
  WA_FKKL8_HDR-STORB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKL8_HDR 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_FKKL8_HDR 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_FKKL8_HDR INTO WA_FKKL8_HDR.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_HDR-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_HDR-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_HDR-STBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_HDR-STBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STORB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_HDR-STORB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_HDR-STORB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_HDR-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_HDR-AWSYS.
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_FKKL8_HDR_STR, 
OPBEL TYPE STRING,
BLART TYPE STRING,
HERKF TYPE STRING,
ERNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
WAERS TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
STBEL TYPE STRING,
STORB TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
AWSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKL8_HDR_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_FKKL8_HDR_STR-OPBEL sy-vline 
WA_FKKL8_HDR_STR-BLART sy-vline 
WA_FKKL8_HDR_STR-HERKF sy-vline 
WA_FKKL8_HDR_STR-ERNAM sy-vline 
WA_FKKL8_HDR_STR-CPUDT sy-vline 
WA_FKKL8_HDR_STR-CPUTM sy-vline 
WA_FKKL8_HDR_STR-WAERS sy-vline 
WA_FKKL8_HDR_STR-BLDAT sy-vline 
WA_FKKL8_HDR_STR-BUDAT sy-vline 
WA_FKKL8_HDR_STR-STBEL sy-vline 
WA_FKKL8_HDR_STR-STORB sy-vline 
WA_FKKL8_HDR_STR-AWTYP sy-vline 
WA_FKKL8_HDR_STR-AWKEY sy-vline 
WA_FKKL8_HDR_STR-AWSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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