ABAP Select data from SAP table CST_PBOM_ITM_EXTENDED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CST_PBOM_ITM_EXTENDED
*  INTO TABLE @DATA(IT_CST_PBOM_ITM_EXTENDED2).
*--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_CST_PBOM_ITM_EXTENDED INDEX 1 INTO DATA(WA_CST_PBOM_ITM_EXTENDED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CST_PBOM_ITM_EXTENDED>-STLKN = 1.
<CST_PBOM_ITM_EXTENDED>-IDNRK = 1.
<CST_PBOM_ITM_EXTENDED>-STVKN = 1.
<CST_PBOM_ITM_EXTENDED>-UPSKZ = 1.
<CST_PBOM_ITM_EXTENDED>-AENNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CST_PBOM_ITM_EXTENDED-AENRA, sy-vline,
  WA_CST_PBOM_ITM_EXTENDED-DATUV, sy-vline,
  WA_CST_PBOM_ITM_EXTENDED-DATUB, sy-vline,
  WA_CST_PBOM_ITM_EXTENDED-POSTP, sy-vline,
  WA_CST_PBOM_ITM_EXTENDED-POSNR, sy-vline,
  WA_CST_PBOM_ITM_EXTENDED-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CST_PBOM_ITM_EXTENDED 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_CST_PBOM_ITM_EXTENDED 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_CST_PBOM_ITM_EXTENDED INTO WA_CST_PBOM_ITM_EXTENDED.


*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 IDNRK
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CST_PBOM_ITM_EXTENDED-IDNRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CST_PBOM_ITM_EXTENDED-IDNRK.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CST_PBOM_ITM_EXTENDED-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CST_PBOM_ITM_EXTENDED-MEINS.
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_CST_PBOM_ITM_EXTENDED_STR, 
STLKN TYPE STRING,
IDNRK TYPE STRING,
STVKN TYPE STRING,
UPSKZ TYPE STRING,
AENNR TYPE STRING,
AENRA TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
FMENG TYPE STRING,
MATTX TYPE STRING,
POTX1 TYPE STRING,
POTX2 TYPE STRING,
AVOAU TYPE STRING,
AUSCH TYPE STRING,
KZKUP TYPE STRING,
DUMPS1 TYPE STRING,
SANFE TYPE STRING,
BEIKZ TYPE STRING,
RGEKZ TYPE STRING,
SCHGT TYPE STRING,
SCHGTMASTERRECORD TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
PTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CST_PBOM_ITM_EXTENDED_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_CST_PBOM_ITM_EXTENDED_STR-STLKN sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-IDNRK sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-STVKN sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-UPSKZ sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-AENNR sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-AENRA sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-DATUV sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-DATUB sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-POSTP sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-POSNR sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-MENGE sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-MEINS sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-FMENG sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-MATTX sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-POTX1 sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-POTX2 sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-AVOAU sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-AUSCH sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-KZKUP sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-DUMPS1 sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-SANFE sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-BEIKZ sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-RGEKZ sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-SCHGT sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-SCHGTMASTERRECORD sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-LGORT sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-PRVBE sy-vline 
WA_CST_PBOM_ITM_EXTENDED_STR-PTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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