ABAP Select data from SAP table DFKKEVL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKEVL
*  INTO TABLE @DATA(IT_DFKKEVL2).
*--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_DFKKEVL INDEX 1 INTO DATA(WA_DFKKEVL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKEVL>-MANDT = 1.
<DFKKEVL>-GUID = 1.
<DFKKEVL>-ERDAT = 1.
<DFKKEVL>-ERTIM = 1.
<DFKKEVL>-ERNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKEVL-KEYPP, sy-vline,
  WA_DFKKEVL-OBJID, sy-vline,
  WA_DFKKEVL-ACTID, sy-vline,
  WA_DFKKEVL-GPART, sy-vline,
  WA_DFKKEVL-VKONT, sy-vline,
  WA_DFKKEVL-VTREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKEVL 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_DFKKEVL 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_DFKKEVL INTO WA_DFKKEVL.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field DOC1R
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKEVL-DOC1R
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKEVL-DOC1R.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field OBJKY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKEVL-OBJKY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKEVL-OBJKY.
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_DFKKEVL_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
KEYPP TYPE STRING,
OBJID TYPE STRING,
ACTID TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
AWKEY TYPE STRING,
AWTYP TYPE STRING,
AWSYS TYPE STRING,
LOGSYS TYPE STRING,
XTREF TYPE STRING,
PROID TYPE STRING,
TEXT TYPE STRING,
DOC1T TYPE STRING,
DOC1R TYPE STRING,
XBLNR TYPE STRING,
OPORD TYPE STRING,
HERKF TYPE STRING,
BUDAT TYPE STRING,
AUGRD TYPE STRING,
HVORG TYPE STRING,
TVORG TYPE STRING,
STAKZ TYPE STRING,
BUKRS TYPE STRING,
SEGMENT TYPE STRING,
GSBER TYPE STRING,
LDGRP TYPE STRING,
OBJRL TYPE STRING,
OBJKY TYPE STRING,
COTYP TYPE STRING,
COKEY TYPE STRING,
COPRI TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
POKEN_PAY TYPE STRING,
POKEN_DUN TYPE STRING,
GRUND TYPE STRING,
PPRSC TYPE STRING,
PPRSW TYPE STRING,
DEAGD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKEVL_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_DFKKEVL_STR-MANDT sy-vline 
WA_DFKKEVL_STR-GUID sy-vline 
WA_DFKKEVL_STR-ERDAT sy-vline 
WA_DFKKEVL_STR-ERTIM sy-vline 
WA_DFKKEVL_STR-ERNAM sy-vline 
WA_DFKKEVL_STR-KEYPP sy-vline 
WA_DFKKEVL_STR-OBJID sy-vline 
WA_DFKKEVL_STR-ACTID sy-vline 
WA_DFKKEVL_STR-GPART sy-vline 
WA_DFKKEVL_STR-VKONT sy-vline 
WA_DFKKEVL_STR-VTREF sy-vline 
WA_DFKKEVL_STR-SUBAP sy-vline 
WA_DFKKEVL_STR-AWKEY sy-vline 
WA_DFKKEVL_STR-AWTYP sy-vline 
WA_DFKKEVL_STR-AWSYS sy-vline 
WA_DFKKEVL_STR-LOGSYS sy-vline 
WA_DFKKEVL_STR-XTREF sy-vline 
WA_DFKKEVL_STR-PROID sy-vline 
WA_DFKKEVL_STR-TEXT sy-vline 
WA_DFKKEVL_STR-DOC1T sy-vline 
WA_DFKKEVL_STR-DOC1R sy-vline 
WA_DFKKEVL_STR-XBLNR sy-vline 
WA_DFKKEVL_STR-OPORD sy-vline 
WA_DFKKEVL_STR-HERKF sy-vline 
WA_DFKKEVL_STR-BUDAT sy-vline 
WA_DFKKEVL_STR-AUGRD sy-vline 
WA_DFKKEVL_STR-HVORG sy-vline 
WA_DFKKEVL_STR-TVORG sy-vline 
WA_DFKKEVL_STR-STAKZ sy-vline 
WA_DFKKEVL_STR-BUKRS sy-vline 
WA_DFKKEVL_STR-SEGMENT sy-vline 
WA_DFKKEVL_STR-GSBER sy-vline 
WA_DFKKEVL_STR-LDGRP sy-vline 
WA_DFKKEVL_STR-OBJRL sy-vline 
WA_DFKKEVL_STR-OBJKY sy-vline 
WA_DFKKEVL_STR-COTYP sy-vline 
WA_DFKKEVL_STR-COKEY sy-vline 
WA_DFKKEVL_STR-COPRI sy-vline 
WA_DFKKEVL_STR-WAERS sy-vline 
WA_DFKKEVL_STR-BETRW sy-vline 
WA_DFKKEVL_STR-POKEN_PAY sy-vline 
WA_DFKKEVL_STR-POKEN_DUN sy-vline 
WA_DFKKEVL_STR-GRUND sy-vline 
WA_DFKKEVL_STR-PPRSC sy-vline 
WA_DFKKEVL_STR-PPRSW sy-vline 
WA_DFKKEVL_STR-DEAGD sy-vline      INTO ld_text SEPARATED BY SPACE.

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