ABAP Select data from SAP table VDCHK_IOA_OI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VDCHK_IOA_OI
*  INTO TABLE @DATA(IT_VDCHK_IOA_OI2).
*--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_VDCHK_IOA_OI INDEX 1 INTO DATA(WA_VDCHK_IOA_OI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VDCHK_IOA_OI>-MANDT = 1.
<VDCHK_IOA_OI>-BUKRS = 1.
<VDCHK_IOA_OI>-KUNNR = 1.
<VDCHK_IOA_OI>-BELNR = 1.
<VDCHK_IOA_OI>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VDCHK_IOA_OI-GJAHR, sy-vline,
  WA_VDCHK_IOA_OI-VERTN, sy-vline,
  WA_VDCHK_IOA_OI-VBEWA, sy-vline,
  WA_VDCHK_IOA_OI-REBZG, sy-vline,
  WA_VDCHK_IOA_OI-REBZZ, sy-vline,
  WA_VDCHK_IOA_OI-REBZJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VDCHK_IOA_OI 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_VDCHK_IOA_OI 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_VDCHK_IOA_OI INTO WA_VDCHK_IOA_OI.


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

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

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

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

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

*Conversion exit GJAHR, internal->external for field REBZJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_VDCHK_IOA_OI-REBZJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VDCHK_IOA_OI-REBZJ.
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_VDCHK_IOA_OI_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
KUNNR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
GJAHR TYPE STRING,
VERTN TYPE STRING,
VBEWA TYPE STRING,
REBZG TYPE STRING,
REBZZ TYPE STRING,
REBZJ TYPE STRING,
ZAEHLER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VDCHK_IOA_OI_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_VDCHK_IOA_OI_STR-MANDT sy-vline 
WA_VDCHK_IOA_OI_STR-BUKRS sy-vline 
WA_VDCHK_IOA_OI_STR-KUNNR sy-vline 
WA_VDCHK_IOA_OI_STR-BELNR sy-vline 
WA_VDCHK_IOA_OI_STR-BUZEI sy-vline 
WA_VDCHK_IOA_OI_STR-GJAHR sy-vline 
WA_VDCHK_IOA_OI_STR-VERTN sy-vline 
WA_VDCHK_IOA_OI_STR-VBEWA sy-vline 
WA_VDCHK_IOA_OI_STR-REBZG sy-vline 
WA_VDCHK_IOA_OI_STR-REBZZ sy-vline 
WA_VDCHK_IOA_OI_STR-REBZJ sy-vline 
WA_VDCHK_IOA_OI_STR-ZAEHLER sy-vline      INTO ld_text SEPARATED BY SPACE.

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