ABAP Select data from SAP table ICWBSVAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICWBSVAR
*  INTO TABLE @DATA(IT_ICWBSVAR2).
*--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_ICWBSVAR INDEX 1 INTO DATA(WA_ICWBSVAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICWBSVAR>-FISCVAR = 1.
<ICWBSVAR>-FISCPER = 1.
<ICWBSVAR>-KOKRS = 1.
<ICWBSVAR>-POSID = 1.
<ICWBSVAR>-VTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICWBSVAR-VTDETAIL, sy-vline,
  WA_ICWBSVAR-VERSN, sy-vline,
  WA_ICWBSVAR-KSTAR, sy-vline,
  WA_ICWBSVAR-SEKNZ, sy-vline,
  WA_ICWBSVAR-VALUTYP, sy-vline,
  WA_ICWBSVAR-MEASTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICWBSVAR 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_ICWBSVAR 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_ICWBSVAR INTO WA_ICWBSVAR.


*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 PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_ICWBSVAR-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICWBSVAR-FISCPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_ICWBSVAR-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICWBSVAR-POSID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AC152, internal->external for field SWG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_ICWBSVAR-SWG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICWBSVAR-SWG.
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_ICWBSVAR_STR, 
FISCVAR TYPE STRING,
FISCPER TYPE STRING,
KOKRS TYPE STRING,
POSID TYPE STRING,
VTYPE TYPE STRING,
VTDETAIL TYPE STRING,
VERSN TYPE STRING,
KSTAR TYPE STRING,
SEKNZ TYPE STRING,
VALUTYP TYPE STRING,
MEASTYPE TYPE STRING,
SWG TYPE STRING,
WAERS TYPE STRING,
CURTYPE TYPE STRING,
GUID TYPE STRING,
CPR_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICWBSVAR_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_ICWBSVAR_STR-FISCVAR sy-vline 
WA_ICWBSVAR_STR-FISCPER sy-vline 
WA_ICWBSVAR_STR-KOKRS sy-vline 
WA_ICWBSVAR_STR-POSID sy-vline 
WA_ICWBSVAR_STR-VTYPE sy-vline 
WA_ICWBSVAR_STR-VTDETAIL sy-vline 
WA_ICWBSVAR_STR-VERSN sy-vline 
WA_ICWBSVAR_STR-KSTAR sy-vline 
WA_ICWBSVAR_STR-SEKNZ sy-vline 
WA_ICWBSVAR_STR-VALUTYP sy-vline 
WA_ICWBSVAR_STR-MEASTYPE sy-vline 
WA_ICWBSVAR_STR-SWG sy-vline 
WA_ICWBSVAR_STR-WAERS sy-vline 
WA_ICWBSVAR_STR-CURTYPE sy-vline 
WA_ICWBSVAR_STR-GUID sy-vline 
WA_ICWBSVAR_STR-CPR_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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