ABAP Select data from SAP table BOM_CLASS_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BOM_CLASS_DATA
*  INTO TABLE @DATA(IT_BOM_CLASS_DATA2).
*--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_BOM_CLASS_DATA INDEX 1 INTO DATA(WA_BOM_CLASS_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BOM_CLASS_DATA>-MANDT = 1.
<BOM_CLASS_DATA>-STLTY = 1.
<BOM_CLASS_DATA>-STLNR = 1.
<BOM_CLASS_DATA>-STLAL = 1.
<BOM_CLASS_DATA>-STKOZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BOM_CLASS_DATA-DATUV, sy-vline,
  WA_BOM_CLASS_DATA-TECHV, sy-vline,
  WA_BOM_CLASS_DATA-AENNR, sy-vline,
  WA_BOM_CLASS_DATA-LKENZ, sy-vline,
  WA_BOM_CLASS_DATA-LOEKZ, sy-vline,
  WA_BOM_CLASS_DATA-VGKZL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BOM_CLASS_DATA 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_BOM_CLASS_DATA 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_BOM_CLASS_DATA INTO WA_BOM_CLASS_DATA.


*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 NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BOM_CLASS_DATA-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BOM_CLASS_DATA-STLNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ISOLA, internal->external for field LTXSP
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BOM_CLASS_DATA-LTXSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BOM_CLASS_DATA-LTXSP.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AENRA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BOM_CLASS_DATA-AENRA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BOM_CLASS_DATA-AENRA.
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_BOM_CLASS_DATA_STR, 
MANDT TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
STKOZ TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
AENNR TYPE STRING,
LKENZ TYPE STRING,
LOEKZ TYPE STRING,
VGKZL TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BMEIN TYPE STRING,
BMENG TYPE STRING,
CADKZ TYPE STRING,
LABOR TYPE STRING,
LTXSP TYPE STRING,
STKTX TYPE STRING,
STLST TYPE STRING,
WRKAN TYPE STRING,
DVDAT TYPE STRING,
DVNAM TYPE STRING,
AEHLP TYPE STRING,
ALEKZ TYPE STRING,
GUIDX TYPE STRING,
VALID_TO TYPE STRING,
ECN_TO TYPE STRING,
BOM_VERSN TYPE STRING,
VERSNST TYPE STRING,
VERSNLASTIND TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
BOM_AIN_IND TYPE STRING,
BOM_PREV_VERSN TYPE STRING,
DUMMY_STKO_INCL_EEW_PS TYPE STRING,
AENRA TYPE STRING,
DATUB TYPE STRING,
LTXKO TYPE STRING,
EXSTL TYPE STRING,
STLBE TYPE STRING,
ZTEXT TYPE STRING,
STLAN TYPE STRING,
KBAUS TYPE STRING,
VERSNIND TYPE STRING,
LTXZU TYPE STRING,
TETYP TYPE STRING,
FLG_LOCK TYPE STRING,
HANDLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BOM_CLASS_DATA_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_BOM_CLASS_DATA_STR-MANDT sy-vline 
WA_BOM_CLASS_DATA_STR-STLTY sy-vline 
WA_BOM_CLASS_DATA_STR-STLNR sy-vline 
WA_BOM_CLASS_DATA_STR-STLAL sy-vline 
WA_BOM_CLASS_DATA_STR-STKOZ sy-vline 
WA_BOM_CLASS_DATA_STR-DATUV sy-vline 
WA_BOM_CLASS_DATA_STR-TECHV sy-vline 
WA_BOM_CLASS_DATA_STR-AENNR sy-vline 
WA_BOM_CLASS_DATA_STR-LKENZ sy-vline 
WA_BOM_CLASS_DATA_STR-LOEKZ sy-vline 
WA_BOM_CLASS_DATA_STR-VGKZL sy-vline 
WA_BOM_CLASS_DATA_STR-ANDAT sy-vline 
WA_BOM_CLASS_DATA_STR-ANNAM sy-vline 
WA_BOM_CLASS_DATA_STR-AEDAT sy-vline 
WA_BOM_CLASS_DATA_STR-AENAM sy-vline 
WA_BOM_CLASS_DATA_STR-BMEIN sy-vline 
WA_BOM_CLASS_DATA_STR-BMENG sy-vline 
WA_BOM_CLASS_DATA_STR-CADKZ sy-vline 
WA_BOM_CLASS_DATA_STR-LABOR sy-vline 
WA_BOM_CLASS_DATA_STR-LTXSP sy-vline 
WA_BOM_CLASS_DATA_STR-STKTX sy-vline 
WA_BOM_CLASS_DATA_STR-STLST sy-vline 
WA_BOM_CLASS_DATA_STR-WRKAN sy-vline 
WA_BOM_CLASS_DATA_STR-DVDAT sy-vline 
WA_BOM_CLASS_DATA_STR-DVNAM sy-vline 
WA_BOM_CLASS_DATA_STR-AEHLP sy-vline 
WA_BOM_CLASS_DATA_STR-ALEKZ sy-vline 
WA_BOM_CLASS_DATA_STR-GUIDX sy-vline 
WA_BOM_CLASS_DATA_STR-VALID_TO sy-vline 
WA_BOM_CLASS_DATA_STR-ECN_TO sy-vline 
WA_BOM_CLASS_DATA_STR-BOM_VERSN sy-vline 
WA_BOM_CLASS_DATA_STR-VERSNST sy-vline 
WA_BOM_CLASS_DATA_STR-VERSNLASTIND sy-vline 
WA_BOM_CLASS_DATA_STR-LASTCHANGEDATETIME sy-vline 
WA_BOM_CLASS_DATA_STR-BOM_AIN_IND sy-vline 
WA_BOM_CLASS_DATA_STR-BOM_PREV_VERSN sy-vline 
WA_BOM_CLASS_DATA_STR-DUMMY_STKO_INCL_EEW_PS sy-vline 
WA_BOM_CLASS_DATA_STR-AENRA sy-vline 
WA_BOM_CLASS_DATA_STR-DATUB sy-vline 
WA_BOM_CLASS_DATA_STR-LTXKO sy-vline 
WA_BOM_CLASS_DATA_STR-EXSTL sy-vline 
WA_BOM_CLASS_DATA_STR-STLBE sy-vline 
WA_BOM_CLASS_DATA_STR-ZTEXT sy-vline 
WA_BOM_CLASS_DATA_STR-STLAN sy-vline 
WA_BOM_CLASS_DATA_STR-KBAUS sy-vline 
WA_BOM_CLASS_DATA_STR-VERSNIND sy-vline 
WA_BOM_CLASS_DATA_STR-LTXZU sy-vline 
WA_BOM_CLASS_DATA_STR-TETYP sy-vline 
WA_BOM_CLASS_DATA_STR-FLG_LOCK sy-vline 
WA_BOM_CLASS_DATA_STR-HANDLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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