ABAP Select data from SAP table ISBOMITEMLINKSTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISBOMITEMLINKSTP
*  INTO TABLE @DATA(IT_ISBOMITEMLINKSTP2).
*--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_ISBOMITEMLINKSTP INDEX 1 INTO DATA(WA_ISBOMITEMLINKSTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISBOMITEMLINKSTP>-KEY = 1.
<ISBOMITEMLINKSTP>-PARENT_KEY = 1.
<ISBOMITEMLINKSTP>-ROOT_KEY = 1.
<ISBOMITEMLINKSTP>-MFGBILLOFMATERIALCATEGORY = 1.
<ISBOMITEMLINKSTP>-MFGBILLOFMATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISBOMITEMLINKSTP-MFGBILLOFMATERIALVARIANT, sy-vline,
  WA_ISBOMITEMLINKSTP-BILLOFMATERIALITEMNODENUMBER, sy-vline,
  WA_ISBOMITEMLINKSTP-MFGBILLOFMATERIALVERSION, sy-vline,
  WA_ISBOMITEMLINKSTP-MATERIAL, sy-vline,
  WA_ISBOMITEMLINKSTP-PLANT, sy-vline,
  WA_ISBOMITEMLINKSTP-ENGINEERINGCHANGEDOCUMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISBOMITEMLINKSTP 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_ISBOMITEMLINKSTP 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_ISBOMITEMLINKSTP INTO WA_ISBOMITEMLINKSTP.


*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 MFGBILLOFMATERIAL
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_ISBOMITEMLINKSTP-MFGBILLOFMATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISBOMITEMLINKSTP-MFGBILLOFMATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ISBOMITEMLINKSTP-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISBOMITEMLINKSTP-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ENGBILLOFMATERIALVARIANT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISBOMITEMLINKSTP-ENGBILLOFMATERIALVARIANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISBOMITEMLINKSTP-ENGBILLOFMATERIALVARIANT.
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_ISBOMITEMLINKSTP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
MFGBILLOFMATERIALCATEGORY TYPE STRING,
MFGBILLOFMATERIAL TYPE STRING,
MFGBILLOFMATERIALVARIANT TYPE STRING,
BILLOFMATERIALITEMNODENUMBER TYPE STRING,
MFGBILLOFMATERIALVERSION TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
ENGINEERINGCHANGEDOCUMENT TYPE STRING,
BILLOFMATERIALITEMUUID TYPE STRING,
ENGBILLOFMATERIALCATEGORY TYPE STRING,
ENGBILLOFMATERIAL TYPE STRING,
ENGBILLOFMATERIALVARIANT TYPE STRING,
BILLOFMATERIALITEMNUMBER TYPE STRING,
ENGBILLOFMATERIALVERSION TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISBOMITEMLINKSTP_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_ISBOMITEMLINKSTP_STR-KEY sy-vline 
WA_ISBOMITEMLINKSTP_STR-PARENT_KEY sy-vline 
WA_ISBOMITEMLINKSTP_STR-ROOT_KEY sy-vline 
WA_ISBOMITEMLINKSTP_STR-MFGBILLOFMATERIALCATEGORY sy-vline 
WA_ISBOMITEMLINKSTP_STR-MFGBILLOFMATERIAL sy-vline 
WA_ISBOMITEMLINKSTP_STR-MFGBILLOFMATERIALVARIANT sy-vline 
WA_ISBOMITEMLINKSTP_STR-BILLOFMATERIALITEMNODENUMBER sy-vline 
WA_ISBOMITEMLINKSTP_STR-MFGBILLOFMATERIALVERSION sy-vline 
WA_ISBOMITEMLINKSTP_STR-MATERIAL sy-vline 
WA_ISBOMITEMLINKSTP_STR-PLANT sy-vline 
WA_ISBOMITEMLINKSTP_STR-ENGINEERINGCHANGEDOCUMENT sy-vline 
WA_ISBOMITEMLINKSTP_STR-BILLOFMATERIALITEMUUID sy-vline 
WA_ISBOMITEMLINKSTP_STR-ENGBILLOFMATERIALCATEGORY sy-vline 
WA_ISBOMITEMLINKSTP_STR-ENGBILLOFMATERIAL sy-vline 
WA_ISBOMITEMLINKSTP_STR-ENGBILLOFMATERIALVARIANT sy-vline 
WA_ISBOMITEMLINKSTP_STR-BILLOFMATERIALITEMNUMBER sy-vline 
WA_ISBOMITEMLINKSTP_STR-ENGBILLOFMATERIALVERSION sy-vline 
WA_ISBOMITEMLINKSTP_STR-HASACTIVEENTITY sy-vline 
WA_ISBOMITEMLINKSTP_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISBOMITEMLINKSTP_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISBOMITEMLINKSTP_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISBOMITEMLINKSTP_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISBOMITEMLINKSTP_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISBOMITEMLINKSTP_STR-ISACTIVEENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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