ABAP Select data from SAP table OIA12I into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIA12I 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 OIA12I. 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 OIA12I 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_OIA12I TYPE STANDARD TABLE OF OIA12I,
      WA_OIA12I TYPE OIA12I,
      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: <OIA12I> TYPE OIA12I.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIA12I.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIA12I
  INTO TABLE IT_OIA12I.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIA12I
*  INTO TABLE @DATA(IT_OIA12I2).
*--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_OIA12I INDEX 1 INTO DATA(WA_OIA12I2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIA12I ASSIGNING <OIA12I>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIA12I>-MANDT = 1.
<OIA12I>-BUKRS = 1.
<OIA12I>-NETNUM = 1.
<OIA12I>-ITMNO = 1.
<OIA12I>-BUDAT = 1.

ENDLOOP.

LOOP AT IT_OIA12I INTO WA_OIA12I.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIA12I-SELKZ, sy-vline,
  WA_OIA12I-OIEXGNUM, sy-vline,
  WA_OIA12I-ITCAT, sy-vline,
  WA_OIA12I-MBLNR, sy-vline,
  WA_OIA12I-MJAHR, sy-vline,
  WA_OIA12I-ZEILE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIA12I 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_OIA12I 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_OIA12I INTO WA_OIA12I.


*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 OIEXGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-OIEXGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-OIEXGNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIVBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-OIVBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-OIVBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CLRNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-CLRNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-CLRNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field OIBASPROD
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-OIBASPROD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-OIBASPROD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIMATREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-OIMATREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-OIMATREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIC_LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-OIC_LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-OIC_LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASEPMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-BASEPMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-BASEPMEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIA12I-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIA12I-MEINS.
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_OIA12I_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
NETNUM TYPE STRING,
ITMNO TYPE STRING,
BUDAT TYPE STRING,
SELKZ TYPE STRING,
OIEXGNUM TYPE STRING,
ITCAT TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
OIVBELN TYPE STRING,
OIPOSNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
SHKZG TYPE STRING,
CLRNO TYPE STRING,
OIBASPROD TYPE STRING,
BOMCON TYPE STRING,
OICLRDCYC TYPE STRING,
OIMATREF TYPE STRING,
OIPIPEVAL TYPE STRING,
OIC_LIFNR TYPE STRING,
OIC_DCITYC TYPE STRING,
OIC_DCOUNC TYPE STRING,
OIC_DREGIO TYPE STRING,
OIC_DLAND1 TYPE STRING,
OIC_OCITYC TYPE STRING,
OIC_OCOUNC TYPE STRING,
OIC_OREGIO TYPE STRING,
OIC_OLAND1 TYPE STRING,
OIC_PORGIN TYPE STRING,
OIC_PDESTN TYPE STRING,
OIC_PTRIP TYPE STRING,
OIC_PBATCH TYPE STRING,
OIC_MOT TYPE STRING,
OIC_AORGIN TYPE STRING,
OIC_ADESTN TYPE STRING,
OIC_TRUCKN TYPE STRING,
OIA_BASELO TYPE STRING,
OID_EXTBOL TYPE STRING,
OID_MISCDL TYPE STRING,
OIAOBAL TYPE STRING,
BASEPMEINS TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIA12I_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_OIA12I_STR-MANDT sy-vline 
WA_OIA12I_STR-BUKRS sy-vline 
WA_OIA12I_STR-NETNUM sy-vline 
WA_OIA12I_STR-ITMNO sy-vline 
WA_OIA12I_STR-BUDAT sy-vline 
WA_OIA12I_STR-SELKZ sy-vline 
WA_OIA12I_STR-OIEXGNUM sy-vline 
WA_OIA12I_STR-ITCAT sy-vline 
WA_OIA12I_STR-MBLNR sy-vline 
WA_OIA12I_STR-MJAHR sy-vline 
WA_OIA12I_STR-ZEILE sy-vline 
WA_OIA12I_STR-MATNR sy-vline 
WA_OIA12I_STR-WERKS sy-vline 
WA_OIA12I_STR-EBELN sy-vline 
WA_OIA12I_STR-EBELP sy-vline 
WA_OIA12I_STR-OIVBELN sy-vline 
WA_OIA12I_STR-OIPOSNR sy-vline 
WA_OIA12I_STR-KDAUF sy-vline 
WA_OIA12I_STR-KDPOS sy-vline 
WA_OIA12I_STR-BELNR sy-vline 
WA_OIA12I_STR-GJAHR sy-vline 
WA_OIA12I_STR-BUZEI sy-vline 
WA_OIA12I_STR-DMBTR sy-vline 
WA_OIA12I_STR-WRBTR sy-vline 
WA_OIA12I_STR-WAERS sy-vline 
WA_OIA12I_STR-SHKZG sy-vline 
WA_OIA12I_STR-CLRNO sy-vline 
WA_OIA12I_STR-OIBASPROD sy-vline 
WA_OIA12I_STR-BOMCON sy-vline 
WA_OIA12I_STR-OICLRDCYC sy-vline 
WA_OIA12I_STR-OIMATREF sy-vline 
WA_OIA12I_STR-OIPIPEVAL sy-vline 
WA_OIA12I_STR-OIC_LIFNR sy-vline 
WA_OIA12I_STR-OIC_DCITYC sy-vline 
WA_OIA12I_STR-OIC_DCOUNC sy-vline 
WA_OIA12I_STR-OIC_DREGIO sy-vline 
WA_OIA12I_STR-OIC_DLAND1 sy-vline 
WA_OIA12I_STR-OIC_OCITYC sy-vline 
WA_OIA12I_STR-OIC_OCOUNC sy-vline 
WA_OIA12I_STR-OIC_OREGIO sy-vline 
WA_OIA12I_STR-OIC_OLAND1 sy-vline 
WA_OIA12I_STR-OIC_PORGIN sy-vline 
WA_OIA12I_STR-OIC_PDESTN sy-vline 
WA_OIA12I_STR-OIC_PTRIP sy-vline 
WA_OIA12I_STR-OIC_PBATCH sy-vline 
WA_OIA12I_STR-OIC_MOT sy-vline 
WA_OIA12I_STR-OIC_AORGIN sy-vline 
WA_OIA12I_STR-OIC_ADESTN sy-vline 
WA_OIA12I_STR-OIC_TRUCKN sy-vline 
WA_OIA12I_STR-OIA_BASELO sy-vline 
WA_OIA12I_STR-OID_EXTBOL sy-vline 
WA_OIA12I_STR-OID_MISCDL sy-vline 
WA_OIA12I_STR-OIAOBAL sy-vline 
WA_OIA12I_STR-BASEPMEINS sy-vline 
WA_OIA12I_STR-MENGE sy-vline 
WA_OIA12I_STR-MEINS sy-vline 
WA_OIA12I_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.