ABAP Select data from SAP table DFKKIA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKIA
*  INTO TABLE @DATA(IT_DFKKIA2).
*--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_DFKKIA INDEX 1 INTO DATA(WA_DFKKIA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKIA>-MANDT = 1.
<DFKKIA>-IOPBEL = 1.
<DFKKIA>-IOPUPK = 1.
<DFKKIA>-OPBEL = 1.
<DFKKIA>-OPUPW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKIA-OPUPK, sy-vline,
  WA_DFKKIA-OPUPZ, sy-vline,
  WA_DFKKIA-LFDNR, sy-vline,
  WA_DFKKIA-ABDAT, sy-vline,
  WA_DFKKIA-BISDAT, sy-vline,
  WA_DFKKIA-ABWBL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKIA 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_DFKKIA 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_DFKKIA INTO WA_DFKKIA.


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

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

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

*Conversion exit ALPHA, internal->external for field SECURITY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKIA-SECURITY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKIA-SECURITY.
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_DFKKIA_STR, 
MANDT TYPE STRING,
IOPBEL TYPE STRING,
IOPUPK TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
LFDNR TYPE STRING,
ABDAT TYPE STRING,
BISDAT TYPE STRING,
ABWBL TYPE STRING,
ABWTP TYPE STRING,
ITYP TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
IKEY TYPE STRING,
IRATE TYPE STRING,
IBTRG TYPE STRING,
INTGRP TYPE STRING,
ROUND TYPE STRING,
SECURITY TYPE STRING,
IKEYD TYPE STRING,
INOLD TYPE STRING,
ITAXN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKIA_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_DFKKIA_STR-MANDT sy-vline 
WA_DFKKIA_STR-IOPBEL sy-vline 
WA_DFKKIA_STR-IOPUPK sy-vline 
WA_DFKKIA_STR-OPBEL sy-vline 
WA_DFKKIA_STR-OPUPW sy-vline 
WA_DFKKIA_STR-OPUPK sy-vline 
WA_DFKKIA_STR-OPUPZ sy-vline 
WA_DFKKIA_STR-LFDNR sy-vline 
WA_DFKKIA_STR-ABDAT sy-vline 
WA_DFKKIA_STR-BISDAT sy-vline 
WA_DFKKIA_STR-ABWBL sy-vline 
WA_DFKKIA_STR-ABWTP sy-vline 
WA_DFKKIA_STR-ITYP sy-vline 
WA_DFKKIA_STR-WAERS sy-vline 
WA_DFKKIA_STR-BETRW sy-vline 
WA_DFKKIA_STR-IKEY sy-vline 
WA_DFKKIA_STR-IRATE sy-vline 
WA_DFKKIA_STR-IBTRG sy-vline 
WA_DFKKIA_STR-INTGRP sy-vline 
WA_DFKKIA_STR-ROUND sy-vline 
WA_DFKKIA_STR-SECURITY sy-vline 
WA_DFKKIA_STR-IKEYD sy-vline 
WA_DFKKIA_STR-INOLD sy-vline 
WA_DFKKIA_STR-ITAXN sy-vline      INTO ld_text SEPARATED BY SPACE.

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