ABAP Select data from SAP table FKK_MKKDS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKK_MKKDS 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_MKKDS. 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_MKKDS 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_MKKDS TYPE STANDARD TABLE OF FKK_MKKDS,
      WA_FKK_MKKDS TYPE FKK_MKKDS,
      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_MKKDS> TYPE FKK_MKKDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKK_MKKDS
*  INTO TABLE @DATA(IT_FKK_MKKDS2).
*--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_MKKDS INDEX 1 INTO DATA(WA_FKK_MKKDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKK_MKKDS>-HEADER = 1.
<FKK_MKKDS>-MANDT = 1.
<FKK_MKKDS>-DEBT_SET_NUMBER = 1.
<FKK_MKKDS>-DEBT_SET_TYPE = 1.
<FKK_MKKDS>-DEBTOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKK_MKKDS-DESCRIPTION, sy-vline,
  WA_FKK_MKKDS-PROTECTION, sy-vline,
  WA_FKK_MKKDS-LIFECYCLE_STATUS, sy-vline,
  WA_FKK_MKKDS-COLLECTION_STRATEGY, sy-vline,
  WA_FKK_MKKDS-COLLECTION_STEP, sy-vline,
  WA_FKK_MKKDS-CREATED_AT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKK_MKKDS 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_MKKDS 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_MKKDS INTO WA_FKK_MKKDS.


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

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

*Conversion exit ALPHA, internal->external for field DEBT_SET_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_MKKDS-DEBT_SET_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_MKKDS-DEBT_SET_NUMBER.
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_MKKDS_STR, 
HEADER TYPE STRING,
MANDT TYPE STRING,
DEBT_SET_NUMBER TYPE STRING,
DEBT_SET_TYPE TYPE STRING,
DEBTOR TYPE STRING,
DESCRIPTION TYPE STRING,
PROTECTION TYPE STRING,
LIFECYCLE_STATUS TYPE STRING,
COLLECTION_STRATEGY TYPE STRING,
COLLECTION_STEP TYPE STRING,
CREATED_AT TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
DUMMY_DCM_DS_H_INCL_EEW_PS TYPE STRING,
CLASSIFICATION TYPE STRING,
CLIENT TYPE STRING,
DEBT_SET_NUMBER TYPE STRING,
FIELD_1 TYPE STRING,
VALUE_1 TYPE STRING,
FIELD_2 TYPE STRING,
VALUE_2 TYPE STRING,
FIELD_3 TYPE STRING,
VALUE_3 TYPE STRING,
FIELD_4 TYPE STRING,
VALUE_4 TYPE STRING,
FIELD_5 TYPE STRING,
VALUE_5 TYPE STRING,
FIELD_6 TYPE STRING,
VALUE_6 TYPE STRING,
ITEMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKK_MKKDS_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_MKKDS_STR-HEADER sy-vline 
WA_FKK_MKKDS_STR-MANDT sy-vline 
WA_FKK_MKKDS_STR-DEBT_SET_NUMBER sy-vline 
WA_FKK_MKKDS_STR-DEBT_SET_TYPE sy-vline 
WA_FKK_MKKDS_STR-DEBTOR sy-vline 
WA_FKK_MKKDS_STR-DESCRIPTION sy-vline 
WA_FKK_MKKDS_STR-PROTECTION sy-vline 
WA_FKK_MKKDS_STR-LIFECYCLE_STATUS sy-vline 
WA_FKK_MKKDS_STR-COLLECTION_STRATEGY sy-vline 
WA_FKK_MKKDS_STR-COLLECTION_STEP sy-vline 
WA_FKK_MKKDS_STR-CREATED_AT sy-vline 
WA_FKK_MKKDS_STR-CREATED_BY sy-vline 
WA_FKK_MKKDS_STR-CHANGED_AT sy-vline 
WA_FKK_MKKDS_STR-CHANGED_BY sy-vline 
WA_FKK_MKKDS_STR-DUMMY_DCM_DS_H_INCL_EEW_PS sy-vline 
WA_FKK_MKKDS_STR-CLASSIFICATION sy-vline 
WA_FKK_MKKDS_STR-CLIENT sy-vline 
WA_FKK_MKKDS_STR-DEBT_SET_NUMBER sy-vline 
WA_FKK_MKKDS_STR-FIELD_1 sy-vline 
WA_FKK_MKKDS_STR-VALUE_1 sy-vline 
WA_FKK_MKKDS_STR-FIELD_2 sy-vline 
WA_FKK_MKKDS_STR-VALUE_2 sy-vline 
WA_FKK_MKKDS_STR-FIELD_3 sy-vline 
WA_FKK_MKKDS_STR-VALUE_3 sy-vline 
WA_FKK_MKKDS_STR-FIELD_4 sy-vline 
WA_FKK_MKKDS_STR-VALUE_4 sy-vline 
WA_FKK_MKKDS_STR-FIELD_5 sy-vline 
WA_FKK_MKKDS_STR-VALUE_5 sy-vline 
WA_FKK_MKKDS_STR-FIELD_6 sy-vline 
WA_FKK_MKKDS_STR-VALUE_6 sy-vline 
WA_FKK_MKKDS_STR-ITEMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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