ABAP Select data from SAP table DFKKZPT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKZPT
*  INTO TABLE @DATA(IT_DFKKZPT2).
*--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_DFKKZPT INDEX 1 INTO DATA(WA_DFKKZPT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKZPT>-MANDT = 1.
<DFKKZPT>-KEYZ1 = 1.
<DFKKZPT>-POSZA = 1.
<DFKKZPT>-TKPOS = 1.
<DFKKZPT>-BETRK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKZPT-BETRL, sy-vline,
  WA_DFKKZPT-XAKON, sy-vline,
  WA_DFKKZPT-KLAEB, sy-vline,
  WA_DFKKZPT-KLAED, sy-vline,
  WA_DFKKZPT-NRZAA, sy-vline,
  WA_DFKKZPT-REPYM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKZPT 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_DFKKZPT 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_DFKKZPT INTO WA_DFKKZPT.


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

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

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

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

*Conversion exit ALPHA, internal->external for field KLAEO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKZPT-KLAEO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKZPT-KLAEO.
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_DFKKZPT_STR, 
MANDT TYPE STRING,
KEYZ1 TYPE STRING,
POSZA TYPE STRING,
TKPOS TYPE STRING,
BETRK TYPE STRING,
BETRL TYPE STRING,
XAKON TYPE STRING,
KLAEB TYPE STRING,
KLAED TYPE STRING,
NRZAA TYPE STRING,
REPYM TYPE STRING,
KUKON TYPE STRING,
RUEBL TYPE STRING,
RUEAR TYPE STRING,
TXTRZ TYPE STRING,
RUEZU TYPE STRING,
HZUON TYPE STRING,
KLAEO TYPE STRING,
KLACO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKZPT_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_DFKKZPT_STR-MANDT sy-vline 
WA_DFKKZPT_STR-KEYZ1 sy-vline 
WA_DFKKZPT_STR-POSZA sy-vline 
WA_DFKKZPT_STR-TKPOS sy-vline 
WA_DFKKZPT_STR-BETRK sy-vline 
WA_DFKKZPT_STR-BETRL sy-vline 
WA_DFKKZPT_STR-XAKON sy-vline 
WA_DFKKZPT_STR-KLAEB sy-vline 
WA_DFKKZPT_STR-KLAED sy-vline 
WA_DFKKZPT_STR-NRZAA sy-vline 
WA_DFKKZPT_STR-REPYM sy-vline 
WA_DFKKZPT_STR-KUKON sy-vline 
WA_DFKKZPT_STR-RUEBL sy-vline 
WA_DFKKZPT_STR-RUEAR sy-vline 
WA_DFKKZPT_STR-TXTRZ sy-vline 
WA_DFKKZPT_STR-RUEZU sy-vline 
WA_DFKKZPT_STR-HZUON sy-vline 
WA_DFKKZPT_STR-KLAEO sy-vline 
WA_DFKKZPT_STR-KLACO sy-vline      INTO ld_text SEPARATED BY SPACE.

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