ABAP Select data from SAP table IDCN_INV_USAGE_BOK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCN_INV_USAGE_BOK
*  INTO TABLE @DATA(IT_IDCN_INV_USAGE_BOK2).
*--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_IDCN_INV_USAGE_BOK INDEX 1 INTO DATA(WA_IDCN_INV_USAGE_BOK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCN_INV_USAGE_BOK>-LOTNO = 1.
<IDCN_INV_USAGE_BOK>-BOKNO = 1.
<IDCN_INV_USAGE_BOK>-STOCKQ = 1.
<IDCN_INV_USAGE_BOK>-STOCKNF = 1.
<IDCN_INV_USAGE_BOK>-STOCKNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCN_INV_USAGE_BOK-PURCHQ, sy-vline,
  WA_IDCN_INV_USAGE_BOK-PURCHNF, sy-vline,
  WA_IDCN_INV_USAGE_BOK-PURCHNT, sy-vline,
  WA_IDCN_INV_USAGE_BOK-ISSUEQ, sy-vline,
  WA_IDCN_INV_USAGE_BOK-ISSUENF, sy-vline,
  WA_IDCN_INV_USAGE_BOK-ISSUENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCN_INV_USAGE_BOK 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_IDCN_INV_USAGE_BOK 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_IDCN_INV_USAGE_BOK INTO WA_IDCN_INV_USAGE_BOK.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IDCN_INV_USAGE_BOK_STR, 
LOTNO TYPE STRING,
BOKNO TYPE STRING,
STOCKQ TYPE STRING,
STOCKNF TYPE STRING,
STOCKNT TYPE STRING,
PURCHQ TYPE STRING,
PURCHNF TYPE STRING,
PURCHNT TYPE STRING,
ISSUEQ TYPE STRING,
ISSUENF TYPE STRING,
ISSUENT TYPE STRING,
VOIDQ TYPE STRING,
LOSTQ TYPE STRING,
RETURNQ TYPE STRING,
RETURNF TYPE STRING,
RETURNT TYPE STRING,
ENDQ TYPE STRING,
ENDNF TYPE STRING,
ENDNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCN_INV_USAGE_BOK_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_IDCN_INV_USAGE_BOK_STR-LOTNO sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-BOKNO sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-STOCKQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-STOCKNF sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-STOCKNT sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-PURCHQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-PURCHNF sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-PURCHNT sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-ISSUEQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-ISSUENF sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-ISSUENT sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-VOIDQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-LOSTQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-RETURNQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-RETURNF sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-RETURNT sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-ENDQ sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-ENDNF sy-vline 
WA_IDCN_INV_USAGE_BOK_STR-ENDNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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