ABAP Select data from SAP table FKK_XDOC_NUM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKK_XDOC_NUM 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_XDOC_NUM. 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_XDOC_NUM 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_XDOC_NUM TYPE STANDARD TABLE OF FKK_XDOC_NUM,
      WA_FKK_XDOC_NUM TYPE FKK_XDOC_NUM,
      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_XDOC_NUM> TYPE FKK_XDOC_NUM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKK_XDOC_NUM
*  INTO TABLE @DATA(IT_FKK_XDOC_NUM2).
*--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_XDOC_NUM INDEX 1 INTO DATA(WA_FKK_XDOC_NUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKK_XDOC_NUM>-VBELN = 1.
<FKK_XDOC_NUM>-LOGSYS = 1.
<FKK_XDOC_NUM>-NOT_FOUND = 1.
<FKK_XDOC_NUM>-CPUDT = 1.
<FKK_XDOC_NUM>-CPUTM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKK_XDOC_NUM-GJAHR, sy-vline,
  WA_FKK_XDOC_NUM-AWTYP, sy-vline,
  WA_FKK_XDOC_NUM-DOCNR, sy-vline,
  WA_FKK_XDOC_NUM-STATUS, sy-vline,
  WA_FKK_XDOC_NUM-DISPLAY, sy-vline,
  WA_FKK_XDOC_NUM-OTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKK_XDOC_NUM 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_XDOC_NUM 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_XDOC_NUM INTO WA_FKK_XDOC_NUM.


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

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

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

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

*Conversion exit GJAHR, internal->external for field AC_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FKK_XDOC_NUM-AC_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_XDOC_NUM-AC_GJAHR.
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_XDOC_NUM_STR, 
VBELN TYPE STRING,
LOGSYS TYPE STRING,
NOT_FOUND TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
GJAHR TYPE STRING,
AWTYP TYPE STRING,
DOCNR TYPE STRING,
STATUS TYPE STRING,
DISPLAY TYPE STRING,
OTEXT TYPE STRING,
RLDNR TYPE STRING,
KOKRS TYPE STRING,
BUKRS TYPE STRING,
AC_GJAHR TYPE STRING,
ICON_ARCH TYPE STRING,
XARCH TYPE STRING,
LDGRP TYPE STRING,
XMBEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKK_XDOC_NUM_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_XDOC_NUM_STR-VBELN sy-vline 
WA_FKK_XDOC_NUM_STR-LOGSYS sy-vline 
WA_FKK_XDOC_NUM_STR-NOT_FOUND sy-vline 
WA_FKK_XDOC_NUM_STR-CPUDT sy-vline 
WA_FKK_XDOC_NUM_STR-CPUTM sy-vline 
WA_FKK_XDOC_NUM_STR-GJAHR sy-vline 
WA_FKK_XDOC_NUM_STR-AWTYP sy-vline 
WA_FKK_XDOC_NUM_STR-DOCNR sy-vline 
WA_FKK_XDOC_NUM_STR-STATUS sy-vline 
WA_FKK_XDOC_NUM_STR-DISPLAY sy-vline 
WA_FKK_XDOC_NUM_STR-OTEXT sy-vline 
WA_FKK_XDOC_NUM_STR-RLDNR sy-vline 
WA_FKK_XDOC_NUM_STR-KOKRS sy-vline 
WA_FKK_XDOC_NUM_STR-BUKRS sy-vline 
WA_FKK_XDOC_NUM_STR-AC_GJAHR sy-vline 
WA_FKK_XDOC_NUM_STR-ICON_ARCH sy-vline 
WA_FKK_XDOC_NUM_STR-XARCH sy-vline 
WA_FKK_XDOC_NUM_STR-LDGRP sy-vline 
WA_FKK_XDOC_NUM_STR-XMBEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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