ABAP Select data from SAP table TEKKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TEKKO
*  INTO TABLE @DATA(IT_TEKKO2).
*--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_TEKKO INDEX 1 INTO DATA(WA_TEKKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TEKKO>-ZTERM = 1.
<TEKKO>-ZBD1T = 1.
<TEKKO>-ZBD2T = 1.
<TEKKO>-ZBD3T = 1.
<TEKKO>-ZBD1P = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TEKKO-ZBD2P, sy-vline,
  WA_TEKKO-ERNAM, sy-vline,
  WA_TEKKO-WAERS, sy-vline,
  WA_TEKKO-WKURS, sy-vline,
  WA_TEKKO-KUFIX, sy-vline,
  WA_TEKKO-INCO1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TEKKO 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_TEKKO 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_TEKKO INTO WA_TEKKO.


*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 EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_TEKKO-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TEKKO-WKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TEKKO-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TEKKO-LOGSY.
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_TEKKO_STR, 
ZTERM TYPE STRING,
ZBD1T TYPE STRING,
ZBD2T TYPE STRING,
ZBD3T TYPE STRING,
ZBD1P TYPE STRING,
ZBD2P TYPE STRING,
ERNAM TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,
KUFIX TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
IHREZ TYPE STRING,
VERKF TYPE STRING,
TELF1 TYPE STRING,
EXPVZ TYPE STRING,
ZOLLA TYPE STRING,
SUBMI TYPE STRING,
LOGSY TYPE STRING,
KDATB TYPE STRING,
KDATE TYPE STRING,
UNSEZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TEKKO_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_TEKKO_STR-ZTERM sy-vline 
WA_TEKKO_STR-ZBD1T sy-vline 
WA_TEKKO_STR-ZBD2T sy-vline 
WA_TEKKO_STR-ZBD3T sy-vline 
WA_TEKKO_STR-ZBD1P sy-vline 
WA_TEKKO_STR-ZBD2P sy-vline 
WA_TEKKO_STR-ERNAM sy-vline 
WA_TEKKO_STR-WAERS sy-vline 
WA_TEKKO_STR-WKURS sy-vline 
WA_TEKKO_STR-KUFIX sy-vline 
WA_TEKKO_STR-INCO1 sy-vline 
WA_TEKKO_STR-INCO2 sy-vline 
WA_TEKKO_STR-IHREZ sy-vline 
WA_TEKKO_STR-VERKF sy-vline 
WA_TEKKO_STR-TELF1 sy-vline 
WA_TEKKO_STR-EXPVZ sy-vline 
WA_TEKKO_STR-ZOLLA sy-vline 
WA_TEKKO_STR-SUBMI sy-vline 
WA_TEKKO_STR-LOGSY sy-vline 
WA_TEKKO_STR-KDATB sy-vline 
WA_TEKKO_STR-KDATE sy-vline 
WA_TEKKO_STR-UNSEZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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