ABAP Select data from SAP table FKKMAS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKMAS
*  INTO TABLE @DATA(IT_FKKMAS2).
*--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_FKKMAS INDEX 1 INTO DATA(WA_FKKMAS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKMAS>-MANDT = 1.
<FKKMAS>-LAUFD = 1.
<FKKMAS>-LAUFI = 1.
<FKKMAS>-AUSDT = 1.
<FKKMAS>-FAEDN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKMAS-BUKRS, sy-vline,
  WA_FKKMAS-GPART, sy-vline,
  WA_FKKMAS-VKONT, sy-vline,
  WA_FKKMAS-XPROT, sy-vline,
  WA_FKKMAS-STRDT, sy-vline,
  WA_FKKMAS-STRZT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKMAS 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_FKKMAS 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_FKKMAS INTO WA_FKKMAS.


*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_FKKMAS-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAS-GPART.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPDEV, internal->external for field PDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAS-PDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAS-PDEST.
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_FKKMAS_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
AUSDT TYPE STRING,
FAEDN TYPE STRING,
BUKRS TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
XPROT TYPE STRING,
STRDT TYPE STRING,
STRZT TYPE STRING,
XSTRF TYPE STRING,
BHOST TYPE STRING,
PDEST TYPE STRING,
PROGN TYPE STRING,
STEXT TYPE STRING,
VONLD TYPE STRING,
BISLD TYPE STRING,
IDENT TYPE STRING,
COPYD TYPE STRING,
COPYI TYPE STRING,
XDATA TYPE STRING,
XHEAD TYPE STRING,
XPRIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKMAS_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_FKKMAS_STR-MANDT sy-vline 
WA_FKKMAS_STR-LAUFD sy-vline 
WA_FKKMAS_STR-LAUFI sy-vline 
WA_FKKMAS_STR-AUSDT sy-vline 
WA_FKKMAS_STR-FAEDN sy-vline 
WA_FKKMAS_STR-BUKRS sy-vline 
WA_FKKMAS_STR-GPART sy-vline 
WA_FKKMAS_STR-VKONT sy-vline 
WA_FKKMAS_STR-XPROT sy-vline 
WA_FKKMAS_STR-STRDT sy-vline 
WA_FKKMAS_STR-STRZT sy-vline 
WA_FKKMAS_STR-XSTRF sy-vline 
WA_FKKMAS_STR-BHOST sy-vline 
WA_FKKMAS_STR-PDEST sy-vline 
WA_FKKMAS_STR-PROGN sy-vline 
WA_FKKMAS_STR-STEXT sy-vline 
WA_FKKMAS_STR-VONLD sy-vline 
WA_FKKMAS_STR-BISLD sy-vline 
WA_FKKMAS_STR-IDENT sy-vline 
WA_FKKMAS_STR-COPYD sy-vline 
WA_FKKMAS_STR-COPYI sy-vline 
WA_FKKMAS_STR-XDATA sy-vline 
WA_FKKMAS_STR-XHEAD sy-vline 
WA_FKKMAS_STR-XPRIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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