ABAP Select data from SAP table ISPRODUCTBOMLINKTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISPRODUCTBOMLINKTP
*  INTO TABLE @DATA(IT_ISPRODUCTBOMLINKTP2).
*--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_ISPRODUCTBOMLINKTP INDEX 1 INTO DATA(WA_ISPRODUCTBOMLINKTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISPRODUCTBOMLINKTP>-KEY = 1.
<ISPRODUCTBOMLINKTP>-PARENT_KEY = 1.
<ISPRODUCTBOMLINKTP>-ROOT_KEY = 1.
<ISPRODUCTBOMLINKTP>-PRODUCT = 1.
<ISPRODUCTBOMLINKTP>-PLANT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISPRODUCTBOMLINKTP-BILLOFMATERIALVARIANTUSAGE, sy-vline,
  WA_ISPRODUCTBOMLINKTP-BILLOFMATERIAL, sy-vline,
  WA_ISPRODUCTBOMLINKTP-BILLOFMATERIALVARIANT, sy-vline,
  WA_ISPRODUCTBOMLINKTP-PRODUCTFOREDIT, sy-vline,
  WA_ISPRODUCTBOMLINKTP-BILLOFMATERIALFOREDIT, sy-vline,
  WA_ISPRODUCTBOMLINKTP-BILLOFMATERIALVARIANTFOREDIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISPRODUCTBOMLINKTP 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_ISPRODUCTBOMLINKTP 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_ISPRODUCTBOMLINKTP INTO WA_ISPRODUCTBOMLINKTP.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field BILLOFMATERIALVARIANTFOREDIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISPRODUCTBOMLINKTP-BILLOFMATERIALVARIANTFOREDIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISPRODUCTBOMLINKTP-BILLOFMATERIALVARIANTFOREDIT.
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_ISPRODUCTBOMLINKTP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
PRODUCT TYPE STRING,
PLANT TYPE STRING,
BILLOFMATERIALVARIANTUSAGE TYPE STRING,
BILLOFMATERIAL TYPE STRING,
BILLOFMATERIALVARIANT TYPE STRING,
PRODUCTFOREDIT TYPE STRING,
BILLOFMATERIALFOREDIT TYPE STRING,
BILLOFMATERIALVARIANTFOREDIT 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_ISPRODUCTBOMLINKTP_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_ISPRODUCTBOMLINKTP_STR-KEY sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-PARENT_KEY sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-ROOT_KEY sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-PRODUCT sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-PLANT sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-BILLOFMATERIALVARIANTUSAGE sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-BILLOFMATERIAL sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-BILLOFMATERIALVARIANT sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-PRODUCTFOREDIT sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-BILLOFMATERIALFOREDIT sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-BILLOFMATERIALVARIANTFOREDIT sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-HASACTIVEENTITY sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISPRODUCTBOMLINKTP_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISPRODUCTBOMLINKTP_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.