ABAP Select data from SAP table CRMT_BSP_CLASS_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMT_BSP_CLASS_ITEM
*  INTO TABLE @DATA(IT_CRMT_BSP_CLASS_ITEM2).
*--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_CRMT_BSP_CLASS_ITEM INDEX 1 INTO DATA(WA_CRMT_BSP_CLASS_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMT_BSP_CLASS_ITEM>-INSTANCE = 1.
<CRMT_BSP_CLASS_ITEM>-OBJECT_GUID = 1.
<CRMT_BSP_CLASS_ITEM>-EXTOBJTYP = 1.
<CRMT_BSP_CLASS_ITEM>-DEVICEID = 1.
<CRMT_BSP_CLASS_ITEM>-PRODUCT_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMT_BSP_CLASS_ITEM-AMOUNT, sy-vline,
  WA_CRMT_BSP_CLASS_ITEM-UNIT, sy-vline,
  WA_CRMT_BSP_CLASS_ITEM-OBJECT_ID, sy-vline,
  WA_CRMT_BSP_CLASS_ITEM-OBJECT_FAMILY, sy-vline,
  WA_CRMT_BSP_CLASS_ITEM-IBASE_AS_A_COMP, sy-vline,
  WA_CRMT_BSP_CLASS_ITEM-DESCR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMT_BSP_CLASS_ITEM 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_CRMT_BSP_CLASS_ITEM 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_CRMT_BSP_CLASS_ITEM INTO WA_CRMT_BSP_CLASS_ITEM.


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

*Conversion exit PRID1, internal->external for field PRODUCT_ID
CALL FUNCTION 'CONVERSION_EXIT_PRID1_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BSP_CLASS_ITEM-PRODUCT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BSP_CLASS_ITEM-PRODUCT_ID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PRID1, internal->external for field OBJECT_ID
CALL FUNCTION 'CONVERSION_EXIT_PRID1_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BSP_CLASS_ITEM-OBJECT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BSP_CLASS_ITEM-OBJECT_ID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TSTPS, internal->external for field VALFR
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BSP_CLASS_ITEM-VALFR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BSP_CLASS_ITEM-VALFR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field VALTO
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BSP_CLASS_ITEM-VALTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BSP_CLASS_ITEM-VALTO.
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_CRMT_BSP_CLASS_ITEM_STR, 
INSTANCE TYPE STRING,
OBJECT_GUID TYPE STRING,
EXTOBJTYP TYPE STRING,
DEVICEID TYPE STRING,
PRODUCT_ID TYPE STRING,
AMOUNT TYPE STRING,
UNIT TYPE STRING,
OBJECT_ID TYPE STRING,
OBJECT_FAMILY TYPE STRING,
IBASE_AS_A_COMP TYPE STRING,
DESCR TYPE STRING,
DESCR_EXT TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
POSNR TYPE STRING,
SORTF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMT_BSP_CLASS_ITEM_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_CRMT_BSP_CLASS_ITEM_STR-INSTANCE sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-OBJECT_GUID sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-EXTOBJTYP sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-DEVICEID sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-PRODUCT_ID sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-AMOUNT sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-UNIT sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-OBJECT_ID sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-OBJECT_FAMILY sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-IBASE_AS_A_COMP sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-DESCR sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-DESCR_EXT sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-VALFR sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-VALTO sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-POSNR sy-vline 
WA_CRMT_BSP_CLASS_ITEM_STR-SORTF sy-vline      INTO ld_text SEPARATED BY SPACE.

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