ABAP Select data from SAP table VIAOM_OM_OBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIAOM_OM_OBJ
*  INTO TABLE @DATA(IT_VIAOM_OM_OBJ2).
*--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_VIAOM_OM_OBJ INDEX 1 INTO DATA(WA_VIAOM_OM_OBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIAOM_OM_OBJ>-MANDT = 1.
<VIAOM_OM_OBJ>-BUS_SCENARIO_ID = 1.
<VIAOM_OM_OBJ>-EXT_OBJECT_ID = 1.
<VIAOM_OM_OBJ>-PO_NUMBER = 1.
<VIAOM_OM_OBJ>-PO_ORDER_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIAOM_OM_OBJ-PO_ITEM_NR, sy-vline,
  WA_VIAOM_OM_OBJ-PURCH_ORG, sy-vline,
  WA_VIAOM_OM_OBJ-PURCH_GRP, sy-vline,
  WA_VIAOM_OM_OBJ-VENDOR, sy-vline,
  WA_VIAOM_OM_OBJ-PO_QUANTITY, sy-vline,
  WA_VIAOM_OM_OBJ-PO_UNIT_MEASURE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIAOM_OM_OBJ 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_VIAOM_OM_OBJ 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_VIAOM_OM_OBJ INTO WA_VIAOM_OM_OBJ.


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

*Conversion exit ALPHA, internal->external for field VENDOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAOM_OM_OBJ-VENDOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAOM_OM_OBJ-VENDOR.
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_VIAOM_OM_OBJ_STR, 
MANDT TYPE STRING,
BUS_SCENARIO_ID TYPE STRING,
EXT_OBJECT_ID TYPE STRING,
PO_NUMBER TYPE STRING,
PO_ORDER_TYPE TYPE STRING,
PO_ITEM_NR TYPE STRING,
PURCH_ORG TYPE STRING,
PURCH_GRP TYPE STRING,
VENDOR TYPE STRING,
PO_QUANTITY TYPE STRING,
PO_UNIT_MEASURE TYPE STRING,
NET_PRICE TYPE STRING,
WAERS TYPE STRING,
PRICE_UNIT TYPE STRING,
WORK_ORDER_ID TYPE STRING,
WORK_ORDER_ITEM TYPE STRING,
WO_CREATE_UNAME TYPE STRING,
WO_MESSAGEUUID TYPE STRING,
WO_STATUS_A TYPE STRING,
WO_STATUS_B TYPE STRING,
OBJECT_NO TYPE STRING,
ACC_ASS_OBJECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIAOM_OM_OBJ_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_VIAOM_OM_OBJ_STR-MANDT sy-vline 
WA_VIAOM_OM_OBJ_STR-BUS_SCENARIO_ID sy-vline 
WA_VIAOM_OM_OBJ_STR-EXT_OBJECT_ID sy-vline 
WA_VIAOM_OM_OBJ_STR-PO_NUMBER sy-vline 
WA_VIAOM_OM_OBJ_STR-PO_ORDER_TYPE sy-vline 
WA_VIAOM_OM_OBJ_STR-PO_ITEM_NR sy-vline 
WA_VIAOM_OM_OBJ_STR-PURCH_ORG sy-vline 
WA_VIAOM_OM_OBJ_STR-PURCH_GRP sy-vline 
WA_VIAOM_OM_OBJ_STR-VENDOR sy-vline 
WA_VIAOM_OM_OBJ_STR-PO_QUANTITY sy-vline 
WA_VIAOM_OM_OBJ_STR-PO_UNIT_MEASURE sy-vline 
WA_VIAOM_OM_OBJ_STR-NET_PRICE sy-vline 
WA_VIAOM_OM_OBJ_STR-WAERS sy-vline 
WA_VIAOM_OM_OBJ_STR-PRICE_UNIT sy-vline 
WA_VIAOM_OM_OBJ_STR-WORK_ORDER_ID sy-vline 
WA_VIAOM_OM_OBJ_STR-WORK_ORDER_ITEM sy-vline 
WA_VIAOM_OM_OBJ_STR-WO_CREATE_UNAME sy-vline 
WA_VIAOM_OM_OBJ_STR-WO_MESSAGEUUID sy-vline 
WA_VIAOM_OM_OBJ_STR-WO_STATUS_A sy-vline 
WA_VIAOM_OM_OBJ_STR-WO_STATUS_B sy-vline 
WA_VIAOM_OM_OBJ_STR-OBJECT_NO sy-vline 
WA_VIAOM_OM_OBJ_STR-ACC_ASS_OBJECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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