ABAP Select data from SAP table V_OIDAP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_OIDAP
*  INTO TABLE @DATA(IT_V_OIDAP2).
*--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_V_OIDAP INDEX 1 INTO DATA(WA_V_OIDAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_OIDAP>-MANDT = 1.
<V_OIDAP>-VKORG = 1.
<V_OIDAP>-VTWEG = 1.
<V_OIDAP>-SPART = 1.
<V_OIDAP>-LAND1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_OIDAP-LZONE, sy-vline,
  WA_V_OIDAP-MATNR, sy-vline,
  WA_V_OIDAP-MATKL, sy-vline,
  WA_V_OIDAP-WERKSP, sy-vline,
  WA_V_OIDAP-LGORTP, sy-vline,
  WA_V_OIDAP-WERK01, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_OIDAP 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_V_OIDAP 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_V_OIDAP INTO WA_V_OIDAP.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_OIDAP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_OIDAP-MATNR.
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_V_OIDAP_STR, 
MANDT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
LAND1 TYPE STRING,
LZONE TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
WERKSP TYPE STRING,
LGORTP TYPE STRING,
WERK01 TYPE STRING,
LGOR01 TYPE STRING,
WERK02 TYPE STRING,
LGOR02 TYPE STRING,
WERK03 TYPE STRING,
LGOR03 TYPE STRING,
WERK04 TYPE STRING,
LGOR04 TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_OIDAP_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_V_OIDAP_STR-MANDT sy-vline 
WA_V_OIDAP_STR-VKORG sy-vline 
WA_V_OIDAP_STR-VTWEG sy-vline 
WA_V_OIDAP_STR-SPART sy-vline 
WA_V_OIDAP_STR-LAND1 sy-vline 
WA_V_OIDAP_STR-LZONE sy-vline 
WA_V_OIDAP_STR-MATNR sy-vline 
WA_V_OIDAP_STR-MATKL sy-vline 
WA_V_OIDAP_STR-WERKSP sy-vline 
WA_V_OIDAP_STR-LGORTP sy-vline 
WA_V_OIDAP_STR-WERK01 sy-vline 
WA_V_OIDAP_STR-LGOR01 sy-vline 
WA_V_OIDAP_STR-WERK02 sy-vline 
WA_V_OIDAP_STR-LGOR02 sy-vline 
WA_V_OIDAP_STR-WERK03 sy-vline 
WA_V_OIDAP_STR-LGOR03 sy-vline 
WA_V_OIDAP_STR-WERK04 sy-vline 
WA_V_OIDAP_STR-LGOR04 sy-vline 
WA_V_OIDAP_STR-ERDAT sy-vline 
WA_V_OIDAP_STR-ERTIM sy-vline 
WA_V_OIDAP_STR-ERNAM sy-vline 
WA_V_OIDAP_STR-AEDAT sy-vline 
WA_V_OIDAP_STR-AETIM sy-vline 
WA_V_OIDAP_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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