ABAP Select data from SAP table TEKPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TEKPO
*  INTO TABLE @DATA(IT_TEKPO2).
*--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_TEKPO INDEX 1 INTO DATA(WA_TEKPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TEKPO>-SPINF = 1.
<TEKPO>-MAHN1 = 1.
<TEKPO>-MAHN2 = 1.
<TEKPO>-MAHN3 = 1.
<TEKPO>-UEBTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TEKPO-UEBTK, sy-vline,
  WA_TEKPO-UNTTO, sy-vline,
  WA_TEKPO-WEPOS, sy-vline,
  WA_TEKPO-WEUNB, sy-vline,
  WA_TEKPO-REPOS, sy-vline,
  WA_TEKPO-ELIKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TEKPO 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_TEKPO 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_TEKPO INTO WA_TEKPO.


*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_TEKPO_STR, 
SPINF TYPE STRING,
MAHN1 TYPE STRING,
MAHN2 TYPE STRING,
MAHN3 TYPE STRING,
UEBTO TYPE STRING,
UEBTK TYPE STRING,
UNTTO TYPE STRING,
WEPOS TYPE STRING,
WEUNB TYPE STRING,
REPOS TYPE STRING,
ELIKZ TYPE STRING,
EREKZ TYPE STRING,
EXART TYPE STRING,
EXPRF TYPE STRING,
STAWN TYPE STRING,
HERKR TYPE STRING,
HERKL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TEKPO_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_TEKPO_STR-SPINF sy-vline 
WA_TEKPO_STR-MAHN1 sy-vline 
WA_TEKPO_STR-MAHN2 sy-vline 
WA_TEKPO_STR-MAHN3 sy-vline 
WA_TEKPO_STR-UEBTO sy-vline 
WA_TEKPO_STR-UEBTK sy-vline 
WA_TEKPO_STR-UNTTO sy-vline 
WA_TEKPO_STR-WEPOS sy-vline 
WA_TEKPO_STR-WEUNB sy-vline 
WA_TEKPO_STR-REPOS sy-vline 
WA_TEKPO_STR-ELIKZ sy-vline 
WA_TEKPO_STR-EREKZ sy-vline 
WA_TEKPO_STR-EXART sy-vline 
WA_TEKPO_STR-EXPRF sy-vline 
WA_TEKPO_STR-STAWN sy-vline 
WA_TEKPO_STR-HERKR sy-vline 
WA_TEKPO_STR-HERKL sy-vline      INTO ld_text SEPARATED BY SPACE.

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