ABAP Select data from SAP table TKENC1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TKENC1 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 TKENC1. 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 TKENC1 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_TKENC1 TYPE STANDARD TABLE OF TKENC1,
      WA_TKENC1 TYPE TKENC1,
      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: <TKENC1> TYPE TKENC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TKENC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TKENC1
  INTO TABLE IT_TKENC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKENC1
*  INTO TABLE @DATA(IT_TKENC12).
*--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_TKENC1 INDEX 1 INTO DATA(WA_TKENC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TKENC1 ASSIGNING <TKENC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKENC1>-MANDT = 1.
<TKENC1>-ERKRS = 1.
<TKENC1>-CHGRUN = 1.
<TKENC1>-KTEXT = 1.
<TKENC1>-NRCHGORD = 1.

ENDLOOP.

LOOP AT IT_TKENC1 INTO WA_TKENC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKENC1-STATUS, sy-vline,
  WA_TKENC1-CHGDATE, sy-vline,
  WA_TKENC1-CHGTIME, sy-vline,
  WA_TKENC1-JOBNAME, sy-vline,
  WA_TKENC1-JOBCOUNT, sy-vline,
  WA_TKENC1-BTCSYSTEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKENC1 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_TKENC1 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_TKENC1 INTO WA_TKENC1.


*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 CHGRUN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TKENC1-CHGRUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKENC1-CHGRUN.
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_TKENC1_STR, 
MANDT TYPE STRING,
ERKRS TYPE STRING,
CHGRUN TYPE STRING,
KTEXT TYPE STRING,
NRCHGORD TYPE STRING,
STATUS TYPE STRING,
CHGDATE TYPE STRING,
CHGTIME TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
BTCSYSTEM TYPE STRING,
SDLSTRTDT TYPE STRING,
SDLSTRTTM TYPE STRING,
FLAGTEST TYPE STRING,
FLAGUNDO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKENC1_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_TKENC1_STR-MANDT sy-vline 
WA_TKENC1_STR-ERKRS sy-vline 
WA_TKENC1_STR-CHGRUN sy-vline 
WA_TKENC1_STR-KTEXT sy-vline 
WA_TKENC1_STR-NRCHGORD sy-vline 
WA_TKENC1_STR-STATUS sy-vline 
WA_TKENC1_STR-CHGDATE sy-vline 
WA_TKENC1_STR-CHGTIME sy-vline 
WA_TKENC1_STR-JOBNAME sy-vline 
WA_TKENC1_STR-JOBCOUNT sy-vline 
WA_TKENC1_STR-BTCSYSTEM sy-vline 
WA_TKENC1_STR-SDLSTRTDT sy-vline 
WA_TKENC1_STR-SDLSTRTTM sy-vline 
WA_TKENC1_STR-FLAGTEST sy-vline 
WA_TKENC1_STR-FLAGUNDO sy-vline      INTO ld_text SEPARATED BY SPACE.

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