ABAP Select data from SAP table BWOM_IFVAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWOM_IFVAR
*  INTO TABLE @DATA(IT_BWOM_IFVAR2).
*--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_BWOM_IFVAR INDEX 1 INTO DATA(WA_BWOM_IFVAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWOM_IFVAR>-MANDT = 1.
<BWOM_IFVAR>-LEDNR = 1.
<BWOM_IFVAR>-OBJNR = 1.
<BWOM_IFVAR>-GJAHR = 1.
<BWOM_IFVAR>-WRTTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWOM_IFVAR-VERSN, sy-vline,
  WA_BWOM_IFVAR-ABKAT, sy-vline,
  WA_BWOM_IFVAR-KSTAR, sy-vline,
  WA_BWOM_IFVAR-HRKFT, sy-vline,
  WA_BWOM_IFVAR-VRGNG, sy-vline,
  WA_BWOM_IFVAR-PAROB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWOM_IFVAR 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_BWOM_IFVAR 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_BWOM_IFVAR INTO WA_BWOM_IFVAR.


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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BWOM_IFVAR-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWOM_IFVAR-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SWG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_BWOM_IFVAR-SWG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWOM_IFVAR-SWG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SWF
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_BWOM_IFVAR-SWF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWOM_IFVAR-SWF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SWV
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_BWOM_IFVAR-SWV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWOM_IFVAR-SWV.
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_BWOM_IFVAR_STR, 
MANDT TYPE STRING,
LEDNR TYPE STRING,
OBJNR TYPE STRING,
GJAHR TYPE STRING,
WRTTP TYPE STRING,
VERSN TYPE STRING,
ABKAT TYPE STRING,
KSTAR TYPE STRING,
HRKFT TYPE STRING,
VRGNG TYPE STRING,
PAROB TYPE STRING,
BEKNZ TYPE STRING,
AWKUS TYPE STRING,
TWAER TYPE STRING,
PERBL TYPE STRING,
FISCVAR TYPE STRING,
FISCPER TYPE STRING,
PERIO TYPE STRING,
WAERS TYPE STRING,
CURTYPE TYPE STRING,
MEINH TYPE STRING,
SWG TYPE STRING,
SWF TYPE STRING,
SWV TYPE STRING,
SMEG TYPE STRING,
SMEF TYPE STRING,
SMEV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWOM_IFVAR_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_BWOM_IFVAR_STR-MANDT sy-vline 
WA_BWOM_IFVAR_STR-LEDNR sy-vline 
WA_BWOM_IFVAR_STR-OBJNR sy-vline 
WA_BWOM_IFVAR_STR-GJAHR sy-vline 
WA_BWOM_IFVAR_STR-WRTTP sy-vline 
WA_BWOM_IFVAR_STR-VERSN sy-vline 
WA_BWOM_IFVAR_STR-ABKAT sy-vline 
WA_BWOM_IFVAR_STR-KSTAR sy-vline 
WA_BWOM_IFVAR_STR-HRKFT sy-vline 
WA_BWOM_IFVAR_STR-VRGNG sy-vline 
WA_BWOM_IFVAR_STR-PAROB sy-vline 
WA_BWOM_IFVAR_STR-BEKNZ sy-vline 
WA_BWOM_IFVAR_STR-AWKUS sy-vline 
WA_BWOM_IFVAR_STR-TWAER sy-vline 
WA_BWOM_IFVAR_STR-PERBL sy-vline 
WA_BWOM_IFVAR_STR-FISCVAR sy-vline 
WA_BWOM_IFVAR_STR-FISCPER sy-vline 
WA_BWOM_IFVAR_STR-PERIO sy-vline 
WA_BWOM_IFVAR_STR-WAERS sy-vline 
WA_BWOM_IFVAR_STR-CURTYPE sy-vline 
WA_BWOM_IFVAR_STR-MEINH sy-vline 
WA_BWOM_IFVAR_STR-SWG sy-vline 
WA_BWOM_IFVAR_STR-SWF sy-vline 
WA_BWOM_IFVAR_STR-SWV sy-vline 
WA_BWOM_IFVAR_STR-SMEG sy-vline 
WA_BWOM_IFVAR_STR-SMEF sy-vline 
WA_BWOM_IFVAR_STR-SMEV sy-vline      INTO ld_text SEPARATED BY SPACE.

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