ABAP Select data from SAP table TKCF_DAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKCF_DAT
*  INTO TABLE @DATA(IT_TKCF_DAT2).
*--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_TKCF_DAT INDEX 1 INTO DATA(WA_TKCF_DAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKCF_DAT>-ROLNM = 1.
<TKCF_DAT>-TIMFL = 1.
<TKCF_DAT>-CHTAB = 1.
<TKCF_DAT>-CHFIE = 1.
<TKCF_DAT>-VALEX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKCF_DAT-FIXVL, sy-vline,
  WA_TKCF_DAT-TIMLC, sy-vline,
  WA_TKCF_DAT-RETAB, sy-vline,
  WA_TKCF_DAT-REFIE, sy-vline,
  WA_TKCF_DAT-REFIL, sy-vline,
  WA_TKCF_DAT-REFLL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKCF_DAT 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_TKCF_DAT 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_TKCF_DAT INTO WA_TKCF_DAT.


*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 CUNIT, internal->external for field UNIT0
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TKCF_DAT-UNIT0
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKCF_DAT-UNIT0.
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_TKCF_DAT_STR, 
ROLNM TYPE STRING,
TIMFL TYPE STRING,
CHTAB TYPE STRING,
CHFIE TYPE STRING,
VALEX TYPE STRING,
FIXVL TYPE STRING,
TIMLC TYPE STRING,
RETAB TYPE STRING,
REFIE TYPE STRING,
REFIL TYPE STRING,
REFLL TYPE STRING,
VIEWN TYPE STRING,
TCDIS TYPE STRING,
TCMOD TYPE STRING,
ATRFB TYPE STRING,
SPCTR TYPE STRING,
ORTAB TYPE STRING,
ORFIE TYPE STRING,
OAPPL TYPE STRING,
OAFIE TYPE STRING,
DIMPR TYPE STRING,
REPIN TYPE STRING,
PLAIN TYPE STRING,
LITIN TYPE STRING,
RCSIN TYPE STRING,
RSLIN TYPE STRING,
CHAIN TYPE STRING,
AGGDI TYPE STRING,
AGGTM TYPE STRING,
AGGFI TYPE STRING,
PRDEC TYPE STRING,
PRSNT TYPE STRING,
SBGRP TYPE STRING,
CCNUM TYPE STRING,
DCURR TYPE STRING,
RFTAB TYPE STRING,
RFFIE TYPE STRING,
DSRFF TYPE STRING,
CQMRK TYPE STRING,
CUKY0 TYPE STRING,
UNIT0 TYPE STRING,
CQFIE TYPE STRING,
TFLAG TYPE STRING,
COBJID TYPE STRING,
DMAC TYPE STRING,
CHNAM TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKCF_DAT_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_TKCF_DAT_STR-ROLNM sy-vline 
WA_TKCF_DAT_STR-TIMFL sy-vline 
WA_TKCF_DAT_STR-CHTAB sy-vline 
WA_TKCF_DAT_STR-CHFIE sy-vline 
WA_TKCF_DAT_STR-VALEX sy-vline 
WA_TKCF_DAT_STR-FIXVL sy-vline 
WA_TKCF_DAT_STR-TIMLC sy-vline 
WA_TKCF_DAT_STR-RETAB sy-vline 
WA_TKCF_DAT_STR-REFIE sy-vline 
WA_TKCF_DAT_STR-REFIL sy-vline 
WA_TKCF_DAT_STR-REFLL sy-vline 
WA_TKCF_DAT_STR-VIEWN sy-vline 
WA_TKCF_DAT_STR-TCDIS sy-vline 
WA_TKCF_DAT_STR-TCMOD sy-vline 
WA_TKCF_DAT_STR-ATRFB sy-vline 
WA_TKCF_DAT_STR-SPCTR sy-vline 
WA_TKCF_DAT_STR-ORTAB sy-vline 
WA_TKCF_DAT_STR-ORFIE sy-vline 
WA_TKCF_DAT_STR-OAPPL sy-vline 
WA_TKCF_DAT_STR-OAFIE sy-vline 
WA_TKCF_DAT_STR-DIMPR sy-vline 
WA_TKCF_DAT_STR-REPIN sy-vline 
WA_TKCF_DAT_STR-PLAIN sy-vline 
WA_TKCF_DAT_STR-LITIN sy-vline 
WA_TKCF_DAT_STR-RCSIN sy-vline 
WA_TKCF_DAT_STR-RSLIN sy-vline 
WA_TKCF_DAT_STR-CHAIN sy-vline 
WA_TKCF_DAT_STR-AGGDI sy-vline 
WA_TKCF_DAT_STR-AGGTM sy-vline 
WA_TKCF_DAT_STR-AGGFI sy-vline 
WA_TKCF_DAT_STR-PRDEC sy-vline 
WA_TKCF_DAT_STR-PRSNT sy-vline 
WA_TKCF_DAT_STR-SBGRP sy-vline 
WA_TKCF_DAT_STR-CCNUM sy-vline 
WA_TKCF_DAT_STR-DCURR sy-vline 
WA_TKCF_DAT_STR-RFTAB sy-vline 
WA_TKCF_DAT_STR-RFFIE sy-vline 
WA_TKCF_DAT_STR-DSRFF sy-vline 
WA_TKCF_DAT_STR-CQMRK sy-vline 
WA_TKCF_DAT_STR-CUKY0 sy-vline 
WA_TKCF_DAT_STR-UNIT0 sy-vline 
WA_TKCF_DAT_STR-CQFIE sy-vline 
WA_TKCF_DAT_STR-TFLAG sy-vline 
WA_TKCF_DAT_STR-COBJID sy-vline 
WA_TKCF_DAT_STR-DMAC sy-vline 
WA_TKCF_DAT_STR-CHNAM sy-vline 
WA_TKCF_DAT_STR-CHDAT sy-vline 
WA_TKCF_DAT_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.