ABAP Select data from SAP table V_TKEF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TKEF
*  INTO TABLE @DATA(IT_V_TKEF2).
*--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_V_TKEF INDEX 1 INTO DATA(WA_V_TKEF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TKEF>-FIENM = 1.
<V_TKEF>-USGFL = 1.
<V_TKEF>-CQMRK = 1.
<V_TKEF>-ROLNM = 1.
<V_TKEF>-TIMFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TKEF-CHTAB, sy-vline,
  WA_V_TKEF-CHFIE, sy-vline,
  WA_V_TKEF-VALEX, sy-vline,
  WA_V_TKEF-TIMLC, sy-vline,
  WA_V_TKEF-RETAB, sy-vline,
  WA_V_TKEF-REFIE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TKEF 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_V_TKEF 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_V_TKEF INTO WA_V_TKEF.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_TKEF_STR, 
FIENM TYPE STRING,
USGFL TYPE STRING,
CQMRK TYPE STRING,
ROLNM TYPE STRING,
TIMFL TYPE STRING,
CHTAB TYPE STRING,
CHFIE TYPE STRING,
VALEX TYPE STRING,
TIMLC TYPE STRING,
RETAB TYPE STRING,
REFIE TYPE STRING,
REFIL TYPE STRING,
REFLL TYPE STRING,
VIEWN TYPE STRING,
SPCTR TYPE STRING,
ORTAB TYPE STRING,
ORFIE TYPE STRING,
DIMPR TYPE STRING,
AGGDI TYPE STRING,
AGGTM TYPE STRING,
AGGFI TYPE STRING,
RFTAB TYPE STRING,
RFFIE TYPE STRING,
DSRFF TYPE STRING,
DMAC TYPE STRING,
KFLDN TYPE STRING,
CHNAM TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TKEF_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_V_TKEF_STR-FIENM sy-vline 
WA_V_TKEF_STR-USGFL sy-vline 
WA_V_TKEF_STR-CQMRK sy-vline 
WA_V_TKEF_STR-ROLNM sy-vline 
WA_V_TKEF_STR-TIMFL sy-vline 
WA_V_TKEF_STR-CHTAB sy-vline 
WA_V_TKEF_STR-CHFIE sy-vline 
WA_V_TKEF_STR-VALEX sy-vline 
WA_V_TKEF_STR-TIMLC sy-vline 
WA_V_TKEF_STR-RETAB sy-vline 
WA_V_TKEF_STR-REFIE sy-vline 
WA_V_TKEF_STR-REFIL sy-vline 
WA_V_TKEF_STR-REFLL sy-vline 
WA_V_TKEF_STR-VIEWN sy-vline 
WA_V_TKEF_STR-SPCTR sy-vline 
WA_V_TKEF_STR-ORTAB sy-vline 
WA_V_TKEF_STR-ORFIE sy-vline 
WA_V_TKEF_STR-DIMPR sy-vline 
WA_V_TKEF_STR-AGGDI sy-vline 
WA_V_TKEF_STR-AGGTM sy-vline 
WA_V_TKEF_STR-AGGFI sy-vline 
WA_V_TKEF_STR-RFTAB sy-vline 
WA_V_TKEF_STR-RFFIE sy-vline 
WA_V_TKEF_STR-DSRFF sy-vline 
WA_V_TKEF_STR-DMAC sy-vline 
WA_V_TKEF_STR-KFLDN sy-vline 
WA_V_TKEF_STR-CHNAM sy-vline 
WA_V_TKEF_STR-CHDAT sy-vline 
WA_V_TKEF_STR-CHTIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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