ABAP Select data from SAP table FKKDOC_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKDOC_ALV
*  INTO TABLE @DATA(IT_FKKDOC_ALV2).
*--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_FKKDOC_ALV INDEX 1 INTO DATA(WA_FKKDOC_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKDOC_ALV>-DOGUID = 1.
<FKKDOC_ALV>-DOTYP = 1.
<FKKDOC_ALV>-TXTDO = 1.
<FKKDOC_ALV>-GPART = 1.
<FKKDOC_ALV>-DESCR_GPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKDOC_ALV-BUKRS, sy-vline,
  WA_FKKDOC_ALV-DESCR_BUKRS, sy-vline,
  WA_FKKDOC_ALV-VKONT, sy-vline,
  WA_FKKDOC_ALV-SUBAP, sy-vline,
  WA_FKKDOC_ALV-VTREF, sy-vline,
  WA_FKKDOC_ALV-ERFDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKDOC_ALV 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_FKKDOC_ALV 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_FKKDOC_ALV INTO WA_FKKDOC_ALV.


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

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

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

*Conversion exit TZSTP, internal->external for field GPCHT
CALL FUNCTION 'CONVERSION_EXIT_TZSTP_OUTPUT'
  EXPORTING
    input =                      WA_FKKDOC_ALV-GPCHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKDOC_ALV-GPCHT.
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_FKKDOC_ALV_STR, 
DOGUID TYPE STRING,
DOTYP TYPE STRING,
TXTDO TYPE STRING,
GPART TYPE STRING,
DESCR_GPART TYPE STRING,
BUKRS TYPE STRING,
DESCR_BUKRS TYPE STRING,
VKONT TYPE STRING,
SUBAP TYPE STRING,
VTREF TYPE STRING,
ERFDT TYPE STRING,
CDATE TYPE STRING,
ERNAM TYPE STRING,
DESCR_ERNAM TYPE STRING,
GPCHT TYPE STRING,
VLDTO TYPE STRING,
BEGRU TYPE STRING,
INPCH TYPE STRING,
SENDCONTROL TYPE STRING,
XNDEL TYPE STRING,
TABID TYPE STRING,
TABKEY TYPE STRING,
DMS_STATUS TYPE STRING,
REFID TYPE STRING,
STALV TYPE STRING,
VKBEZ TYPE STRING,
VTREF_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKDOC_ALV_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_FKKDOC_ALV_STR-DOGUID sy-vline 
WA_FKKDOC_ALV_STR-DOTYP sy-vline 
WA_FKKDOC_ALV_STR-TXTDO sy-vline 
WA_FKKDOC_ALV_STR-GPART sy-vline 
WA_FKKDOC_ALV_STR-DESCR_GPART sy-vline 
WA_FKKDOC_ALV_STR-BUKRS sy-vline 
WA_FKKDOC_ALV_STR-DESCR_BUKRS sy-vline 
WA_FKKDOC_ALV_STR-VKONT sy-vline 
WA_FKKDOC_ALV_STR-SUBAP sy-vline 
WA_FKKDOC_ALV_STR-VTREF sy-vline 
WA_FKKDOC_ALV_STR-ERFDT sy-vline 
WA_FKKDOC_ALV_STR-CDATE sy-vline 
WA_FKKDOC_ALV_STR-ERNAM sy-vline 
WA_FKKDOC_ALV_STR-DESCR_ERNAM sy-vline 
WA_FKKDOC_ALV_STR-GPCHT sy-vline 
WA_FKKDOC_ALV_STR-VLDTO sy-vline 
WA_FKKDOC_ALV_STR-BEGRU sy-vline 
WA_FKKDOC_ALV_STR-INPCH sy-vline 
WA_FKKDOC_ALV_STR-SENDCONTROL sy-vline 
WA_FKKDOC_ALV_STR-XNDEL sy-vline 
WA_FKKDOC_ALV_STR-TABID sy-vline 
WA_FKKDOC_ALV_STR-TABKEY sy-vline 
WA_FKKDOC_ALV_STR-DMS_STATUS sy-vline 
WA_FKKDOC_ALV_STR-REFID sy-vline 
WA_FKKDOC_ALV_STR-STALV sy-vline 
WA_FKKDOC_ALV_STR-VKBEZ sy-vline 
WA_FKKDOC_ALV_STR-VTREF_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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