ABAP Select data from SAP table TFK012 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK012 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 TFK012. 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 TFK012 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_TFK012 TYPE STANDARD TABLE OF TFK012,
      WA_TFK012 TYPE TFK012,
      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: <TFK012> TYPE TFK012.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK012.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK012
  INTO TABLE IT_TFK012.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK012
*  INTO TABLE @DATA(IT_TFK0122).
*--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_TFK012 INDEX 1 INTO DATA(WA_TFK0122).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK012 ASSIGNING <TFK012>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK012>-MANDT = 1.
<TFK012>-BUKRS = 1.
<TFK012>-BVRKO = 1.
<TFK012>-HBKID = 1.
<TFK012>-HKTID = 1.

ENDLOOP.

LOOP AT IT_TFK012 INTO WA_TFK012.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK012-GPARK, sy-vline,
  WA_TFK012-XBVRZS, sy-vline,
  WA_TFK012-XBVRRL, sy-vline,
  WA_TFK012-XBVRSS, sy-vline,
  WA_TFK012-XBVRCR, sy-vline,
  WA_TFK012-XBVZAU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK012 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_TFK012 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_TFK012 INTO WA_TFK012.


*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 BVRKO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TFK012-BVRKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TFK012-BVRKO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPARK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TFK012-GPARK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TFK012-GPARK.
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_TFK012_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
BVRKO TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
GPARK TYPE STRING,
XBVRZS TYPE STRING,
XBVRRL TYPE STRING,
XBVRSS TYPE STRING,
XBVRCR TYPE STRING,
XBVZAU TYPE STRING,
XBVROL TYPE STRING,
XBVRVT TYPE STRING,
XBVRPDC TYPE STRING,
DECRE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK012_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_TFK012_STR-MANDT sy-vline 
WA_TFK012_STR-BUKRS sy-vline 
WA_TFK012_STR-BVRKO sy-vline 
WA_TFK012_STR-HBKID sy-vline 
WA_TFK012_STR-HKTID sy-vline 
WA_TFK012_STR-GPARK sy-vline 
WA_TFK012_STR-XBVRZS sy-vline 
WA_TFK012_STR-XBVRRL sy-vline 
WA_TFK012_STR-XBVRSS sy-vline 
WA_TFK012_STR-XBVRCR sy-vline 
WA_TFK012_STR-XBVZAU sy-vline 
WA_TFK012_STR-XBVROL sy-vline 
WA_TFK012_STR-XBVRVT sy-vline 
WA_TFK012_STR-XBVRPDC sy-vline 
WA_TFK012_STR-DECRE sy-vline      INTO ld_text SEPARATED BY SPACE.

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