ABAP Select data from SAP table OIAFE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIAFE
*  INTO TABLE @DATA(IT_OIAFE2).
*--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_OIAFE INDEX 1 INTO DATA(WA_OIAFE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIAFE>-MANDT = 1.
<OIAFE>-EBELN = 1.
<OIAFE>-EBELP = 1.
<OIAFE>-GJAHR = 1.
<OIAFE>-LFBNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIAFE-LFPOS, sy-vline,
  WA_OIAFE-BELNR, sy-vline,
  WA_OIAFE-BLPOS, sy-vline,
  WA_OIAFE-VGABE, sy-vline,
  WA_OIAFE-KNUMV, sy-vline,
  WA_OIAFE-BEWTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIAFE 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_OIAFE 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_OIAFE INTO WA_OIAFE.


*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_OIAFE-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIAFE-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIAFE-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIAFE-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIAFE-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIAFE-LIFNR.
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_OIAFE_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
GJAHR TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
BELNR TYPE STRING,
BLPOS TYPE STRING,
VGABE TYPE STRING,
KNUMV TYPE STRING,
BEWTP TYPE STRING,
BUDAT TYPE STRING,
MENGE TYPE STRING,
OIDMBTR TYPE STRING,
OIWRBTR TYPE STRING,
WAERS TYPE STRING,
AREWR TYPE STRING,
SHKZG TYPE STRING,
LIFNR TYPE STRING,
XBLNR TYPE STRING,
FRBNR TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
REEWR TYPE STRING,
REFWR TYPE STRING,
OINEGPSTG TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIAFE_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_OIAFE_STR-MANDT sy-vline 
WA_OIAFE_STR-EBELN sy-vline 
WA_OIAFE_STR-EBELP sy-vline 
WA_OIAFE_STR-GJAHR sy-vline 
WA_OIAFE_STR-LFBNR sy-vline 
WA_OIAFE_STR-LFPOS sy-vline 
WA_OIAFE_STR-BELNR sy-vline 
WA_OIAFE_STR-BLPOS sy-vline 
WA_OIAFE_STR-VGABE sy-vline 
WA_OIAFE_STR-KNUMV sy-vline 
WA_OIAFE_STR-BEWTP sy-vline 
WA_OIAFE_STR-BUDAT sy-vline 
WA_OIAFE_STR-MENGE sy-vline 
WA_OIAFE_STR-OIDMBTR sy-vline 
WA_OIAFE_STR-OIWRBTR sy-vline 
WA_OIAFE_STR-WAERS sy-vline 
WA_OIAFE_STR-AREWR sy-vline 
WA_OIAFE_STR-SHKZG sy-vline 
WA_OIAFE_STR-LIFNR sy-vline 
WA_OIAFE_STR-XBLNR sy-vline 
WA_OIAFE_STR-FRBNR sy-vline 
WA_OIAFE_STR-ERDAT sy-vline 
WA_OIAFE_STR-ERTIM sy-vline 
WA_OIAFE_STR-REEWR sy-vline 
WA_OIAFE_STR-REFWR sy-vline 
WA_OIAFE_STR-OINEGPSTG sy-vline 
WA_OIAFE_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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