ABAP Select data from SAP table IEKPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEKPO
*  INTO TABLE @DATA(IT_IEKPO2).
*--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_IEKPO INDEX 1 INTO DATA(WA_IEKPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEKPO>-EBELP = 1.
<IEKPO>-ADRNR = 1.
<IEKPO>-EMATN = 1.
<IEKPO>-INFNR = 1.
<IEKPO>-KNTTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEKPO-KONNR, sy-vline,
  WA_IEKPO-KTPNR, sy-vline,
  WA_IEKPO-KUNNR, sy-vline,
  WA_IEKPO-LGORT, sy-vline,
  WA_IEKPO-MATKL, sy-vline,
  WA_IEKPO-MEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEKPO 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_IEKPO 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_IEKPO INTO WA_IEKPO.


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

*Conversion exit MATN1, internal->external for field EMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-EMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-EMATN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-INFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-INFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KONNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-KONNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-KONNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-ABELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-ABELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-BPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-BPRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEKPO-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEKPO-AKTNR.
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_IEKPO_STR, 
EBELP TYPE STRING,
ADRNR TYPE STRING,
EMATN TYPE STRING,
INFNR TYPE STRING,
KNTTP TYPE STRING,
KONNR TYPE STRING,
KTPNR TYPE STRING,
KUNNR TYPE STRING,
LGORT TYPE STRING,
MATKL TYPE STRING,
MEINS TYPE STRING,
PSTYP TYPE STRING,
TWRKZ TYPE STRING,
TXZ01 TYPE STRING,
VRTKZ TYPE STRING,
WERKS TYPE STRING,
KANBA TYPE STRING,
ABELN TYPE STRING,
ABELP TYPE STRING,
NETPR TYPE STRING,
PEINH TYPE STRING,
BPRME TYPE STRING,
BPUMZ TYPE STRING,
BPUMN TYPE STRING,
PACKNO TYPE STRING,
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,
TEKPOREL TYPE STRING,
AKTNR TYPE STRING,
IDNLF TYPE STRING,
XFELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEKPO_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_IEKPO_STR-EBELP sy-vline 
WA_IEKPO_STR-ADRNR sy-vline 
WA_IEKPO_STR-EMATN sy-vline 
WA_IEKPO_STR-INFNR sy-vline 
WA_IEKPO_STR-KNTTP sy-vline 
WA_IEKPO_STR-KONNR sy-vline 
WA_IEKPO_STR-KTPNR sy-vline 
WA_IEKPO_STR-KUNNR sy-vline 
WA_IEKPO_STR-LGORT sy-vline 
WA_IEKPO_STR-MATKL sy-vline 
WA_IEKPO_STR-MEINS sy-vline 
WA_IEKPO_STR-PSTYP sy-vline 
WA_IEKPO_STR-TWRKZ sy-vline 
WA_IEKPO_STR-TXZ01 sy-vline 
WA_IEKPO_STR-VRTKZ sy-vline 
WA_IEKPO_STR-WERKS sy-vline 
WA_IEKPO_STR-KANBA sy-vline 
WA_IEKPO_STR-ABELN sy-vline 
WA_IEKPO_STR-ABELP sy-vline 
WA_IEKPO_STR-NETPR sy-vline 
WA_IEKPO_STR-PEINH sy-vline 
WA_IEKPO_STR-BPRME sy-vline 
WA_IEKPO_STR-BPUMZ sy-vline 
WA_IEKPO_STR-BPUMN sy-vline 
WA_IEKPO_STR-PACKNO sy-vline 
WA_IEKPO_STR-SPINF sy-vline 
WA_IEKPO_STR-MAHN1 sy-vline 
WA_IEKPO_STR-MAHN2 sy-vline 
WA_IEKPO_STR-MAHN3 sy-vline 
WA_IEKPO_STR-UEBTO sy-vline 
WA_IEKPO_STR-UEBTK sy-vline 
WA_IEKPO_STR-UNTTO sy-vline 
WA_IEKPO_STR-WEPOS sy-vline 
WA_IEKPO_STR-WEUNB sy-vline 
WA_IEKPO_STR-REPOS sy-vline 
WA_IEKPO_STR-ELIKZ sy-vline 
WA_IEKPO_STR-EREKZ sy-vline 
WA_IEKPO_STR-EXART sy-vline 
WA_IEKPO_STR-EXPRF sy-vline 
WA_IEKPO_STR-STAWN sy-vline 
WA_IEKPO_STR-HERKR sy-vline 
WA_IEKPO_STR-HERKL sy-vline 
WA_IEKPO_STR-TEKPOREL sy-vline 
WA_IEKPO_STR-AKTNR sy-vline 
WA_IEKPO_STR-IDNLF sy-vline 
WA_IEKPO_STR-XFELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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