ABAP Select data from SAP table OI0_IFEKKOOAHEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OI0_IFEKKOOAHEAD 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 OI0_IFEKKOOAHEAD. 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 OI0_IFEKKOOAHEAD 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_OI0_IFEKKOOAHEAD TYPE STANDARD TABLE OF OI0_IFEKKOOAHEAD,
      WA_OI0_IFEKKOOAHEAD TYPE OI0_IFEKKOOAHEAD,
      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: <OI0_IFEKKOOAHEAD> TYPE OI0_IFEKKOOAHEAD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OI0_IFEKKOOAHEAD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OI0_IFEKKOOAHEAD
  INTO TABLE IT_OI0_IFEKKOOAHEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OI0_IFEKKOOAHEAD
*  INTO TABLE @DATA(IT_OI0_IFEKKOOAHEAD2).
*--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_OI0_IFEKKOOAHEAD INDEX 1 INTO DATA(WA_OI0_IFEKKOOAHEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OI0_IFEKKOOAHEAD ASSIGNING <OI0_IFEKKOOAHEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OI0_IFEKKOOAHEAD>-EBELN = 1.
<OI0_IFEKKOOAHEAD>-BSTYP = 1.
<OI0_IFEKKOOAHEAD>-BUKRS = 1.
<OI0_IFEKKOOAHEAD>-BSART = 1.
<OI0_IFEKKOOAHEAD>-LOEKZ = 1.

ENDLOOP.

LOOP AT IT_OI0_IFEKKOOAHEAD INTO WA_OI0_IFEKKOOAHEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OI0_IFEKKOOAHEAD-STATU, sy-vline,
  WA_OI0_IFEKKOOAHEAD-ERDAT, sy-vline,
  WA_OI0_IFEKKOOAHEAD-ERNAM, sy-vline,
  WA_OI0_IFEKKOOAHEAD-PINCR, sy-vline,
  WA_OI0_IFEKKOOAHEAD-LIFNR, sy-vline,
  WA_OI0_IFEKKOOAHEAD-SPRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OI0_IFEKKOOAHEAD 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_OI0_IFEKKOOAHEAD 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_OI0_IFEKKOOAHEAD INTO WA_OI0_IFEKKOOAHEAD.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-WKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LLIEF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-LLIEF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-LLIEF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KONNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-KONNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-KONNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-LIFRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-LIFRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OI0_IFEKKOOAHEAD-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OI0_IFEKKOOAHEAD-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_OI0_IFEKKOOAHEAD_STR, 
EBELN TYPE STRING,
BSTYP TYPE STRING,
BUKRS TYPE STRING,
BSART TYPE STRING,
LOEKZ TYPE STRING,
STATU TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
PINCR TYPE STRING,
LIFNR TYPE STRING,
SPRAS TYPE STRING,
ZTERM TYPE STRING,
ZBD1T TYPE STRING,
ZBD2T TYPE STRING,
ZBD3T TYPE STRING,
ZBD1P TYPE STRING,
ZBD2P TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,
KUFIX TYPE STRING,
BEDAT TYPE STRING,
KDATB TYPE STRING,
KDATE TYPE STRING,
ANGNR TYPE STRING,
IHRAN TYPE STRING,
IHREZ TYPE STRING,
VERKF TYPE STRING,
TELF1 TYPE STRING,
LLIEF TYPE STRING,
KUNNR TYPE STRING,
KONNR TYPE STRING,
RESWK TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
SUBMI TYPE STRING,
LIFRE TYPE STRING,
UNSEZ TYPE STRING,
LOGSY TYPE STRING,
UPINC TYPE STRING,
FRGKE TYPE STRING,
FRGKZ TYPE STRING,
STCEG_L TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OI0_IFEKKOOAHEAD_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_OI0_IFEKKOOAHEAD_STR-EBELN sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-BSTYP sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-BUKRS sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-BSART sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-LOEKZ sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-STATU sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ERDAT sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ERNAM sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-PINCR sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-LIFNR sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-SPRAS sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ZTERM sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ZBD1T sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ZBD2T sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ZBD3T sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ZBD1P sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ZBD2P sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-EKORG sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-EKGRP sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-WAERS sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-WKURS sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-KUFIX sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-BEDAT sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-KDATB sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-KDATE sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-ANGNR sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-IHRAN sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-IHREZ sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-VERKF sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-TELF1 sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-LLIEF sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-KUNNR sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-KONNR sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-RESWK sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-INCO1 sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-INCO2 sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-SUBMI sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-LIFRE sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-UNSEZ sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-LOGSY sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-UPINC sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-FRGKE sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-FRGKZ sy-vline 
WA_OI0_IFEKKOOAHEAD_STR-STCEG_L sy-vline      INTO ld_text SEPARATED BY SPACE.

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