ABAP Select data from SAP table DFKKPREPERR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKPREPERR
*  INTO TABLE @DATA(IT_DFKKPREPERR2).
*--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_DFKKPREPERR INDEX 1 INTO DATA(WA_DFKKPREPERR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKPREPERR>-MANDT = 1.
<DFKKPREPERR>-XSUCC = 1.
<DFKKPREPERR>-OPBEL = 1.
<DFKKPREPERR>-PGUID = 1.
<DFKKPREPERR>-CPUDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKPREPERR-CPUTM, sy-vline,
  WA_DFKKPREPERR-LUPDD, sy-vline,
  WA_DFKKPREPERR-LUPDT, sy-vline,
  WA_DFKKPREPERR-LUPDU, sy-vline,
  WA_DFKKPREPERR-UPDCT, sy-vline,
  WA_DFKKPREPERR-KORRB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKPREPERR 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_DFKKPREPERR 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_DFKKPREPERR INTO WA_DFKKPREPERR.


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

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

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

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

*Conversion exit ALPHA, internal->external for field PPDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKPREPERR-PPDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKPREPERR-PPDOC.
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_DFKKPREPERR_STR, 
MANDT TYPE STRING,
XSUCC TYPE STRING,
OPBEL TYPE STRING,
PGUID TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
LUPDD TYPE STRING,
LUPDT TYPE STRING,
LUPDU TYPE STRING,
UPDCT TYPE STRING,
KORRB TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGVX TYPE STRING,
ERRCC TYPE STRING,
PPACC TYPE STRING,
PREPR TYPE STRING,
GPART TYPE STRING,
BETRW TYPE STRING,
BETRW_ADD TYPE STRING,
WAERS TYPE STRING,
WAERS_PP TYPE STRING,
REFPK TYPE STRING,
RFPCN TYPE STRING,
XRVRF TYPE STRING,
PPRSN TYPE STRING,
PPDOC TYPE STRING,
CRDRS TYPE STRING,
PPNOT TYPE STRING,
TUMTH TYPE STRING,
TULOC TYPE STRING,
BKVID TYPE STRING,
CRDID TYPE STRING,
CGUID TYPE STRING,
TUSE1 TYPE STRING,
CNTU1 TYPE STRING,
TUSE2 TYPE STRING,
CNTU2 TYPE STRING,
TUSE3 TYPE STRING,
CNTU3 TYPE STRING,
PPRND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKPREPERR_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_DFKKPREPERR_STR-MANDT sy-vline 
WA_DFKKPREPERR_STR-XSUCC sy-vline 
WA_DFKKPREPERR_STR-OPBEL sy-vline 
WA_DFKKPREPERR_STR-PGUID sy-vline 
WA_DFKKPREPERR_STR-CPUDT sy-vline 
WA_DFKKPREPERR_STR-CPUTM sy-vline 
WA_DFKKPREPERR_STR-LUPDD sy-vline 
WA_DFKKPREPERR_STR-LUPDT sy-vline 
WA_DFKKPREPERR_STR-LUPDU sy-vline 
WA_DFKKPREPERR_STR-UPDCT sy-vline 
WA_DFKKPREPERR_STR-KORRB sy-vline 
WA_DFKKPREPERR_STR-MSGID sy-vline 
WA_DFKKPREPERR_STR-MSGNO sy-vline 
WA_DFKKPREPERR_STR-MSGVX sy-vline 
WA_DFKKPREPERR_STR-ERRCC sy-vline 
WA_DFKKPREPERR_STR-PPACC sy-vline 
WA_DFKKPREPERR_STR-PREPR sy-vline 
WA_DFKKPREPERR_STR-GPART sy-vline 
WA_DFKKPREPERR_STR-BETRW sy-vline 
WA_DFKKPREPERR_STR-BETRW_ADD sy-vline 
WA_DFKKPREPERR_STR-WAERS sy-vline 
WA_DFKKPREPERR_STR-WAERS_PP sy-vline 
WA_DFKKPREPERR_STR-REFPK sy-vline 
WA_DFKKPREPERR_STR-RFPCN sy-vline 
WA_DFKKPREPERR_STR-XRVRF sy-vline 
WA_DFKKPREPERR_STR-PPRSN sy-vline 
WA_DFKKPREPERR_STR-PPDOC sy-vline 
WA_DFKKPREPERR_STR-CRDRS sy-vline 
WA_DFKKPREPERR_STR-PPNOT sy-vline 
WA_DFKKPREPERR_STR-TUMTH sy-vline 
WA_DFKKPREPERR_STR-TULOC sy-vline 
WA_DFKKPREPERR_STR-BKVID sy-vline 
WA_DFKKPREPERR_STR-CRDID sy-vline 
WA_DFKKPREPERR_STR-CGUID sy-vline 
WA_DFKKPREPERR_STR-TUSE1 sy-vline 
WA_DFKKPREPERR_STR-CNTU1 sy-vline 
WA_DFKKPREPERR_STR-TUSE2 sy-vline 
WA_DFKKPREPERR_STR-CNTU2 sy-vline 
WA_DFKKPREPERR_STR-TUSE3 sy-vline 
WA_DFKKPREPERR_STR-CNTU3 sy-vline 
WA_DFKKPREPERR_STR-PPRND sy-vline      INTO ld_text SEPARATED BY SPACE.

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