ABAP Select data from SAP table COMPOPRB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMPOPRB
*  INTO TABLE @DATA(IT_COMPOPRB2).
*--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_COMPOPRB INDEX 1 INTO DATA(WA_COMPOPRB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMPOPRB>-MANDT = 1.
<COMPOPRB>-COMPNUM = 1.
<COMPOPRB>-COMPCNT = 1.
<COMPOPRB>-VSNMR1 = 1.
<COMPOPRB>-AUFPL1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMPOPRB-APLZL1, sy-vline,
  WA_COMPOPRB-SUMNR1, sy-vline,
  WA_COMPOPRB-APLFL1, sy-vline,
  WA_COMPOPRB-PLNFL1, sy-vline,
  WA_COMPOPRB-VSNMR2, sy-vline,
  WA_COMPOPRB-AUFPL2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMPOPRB 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_COMPOPRB 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_COMPOPRB INTO WA_COMPOPRB.


*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 APLFL1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPOPRB-APLFL1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPOPRB-APLFL1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNFL1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPOPRB-PLNFL1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPOPRB-PLNFL1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APLFL2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPOPRB-APLFL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPOPRB-APLFL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNFL2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPOPRB-PLNFL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPOPRB-PLNFL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPOPRB-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPOPRB-AENNR.
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_COMPOPRB_STR, 
MANDT TYPE STRING,
COMPNUM TYPE STRING,
COMPCNT TYPE STRING,
VSNMR1 TYPE STRING,
AUFPL1 TYPE STRING,
APLZL1 TYPE STRING,
SUMNR1 TYPE STRING,
APLFL1 TYPE STRING,
PLNFL1 TYPE STRING,
VSNMR2 TYPE STRING,
AUFPL2 TYPE STRING,
APLZL2 TYPE STRING,
SUMNR2 TYPE STRING,
APLFL2 TYPE STRING,
PLNFL2 TYPE STRING,
RESULT TYPE STRING,
LOWDIFF TYPE STRING,
CONFTYP TYPE STRING,
STATUS TYPE STRING,
EXKEY TYPE STRING,
LTXA1 TYPE STRING,
AENNR TYPE STRING,
UPDIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMPOPRB_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_COMPOPRB_STR-MANDT sy-vline 
WA_COMPOPRB_STR-COMPNUM sy-vline 
WA_COMPOPRB_STR-COMPCNT sy-vline 
WA_COMPOPRB_STR-VSNMR1 sy-vline 
WA_COMPOPRB_STR-AUFPL1 sy-vline 
WA_COMPOPRB_STR-APLZL1 sy-vline 
WA_COMPOPRB_STR-SUMNR1 sy-vline 
WA_COMPOPRB_STR-APLFL1 sy-vline 
WA_COMPOPRB_STR-PLNFL1 sy-vline 
WA_COMPOPRB_STR-VSNMR2 sy-vline 
WA_COMPOPRB_STR-AUFPL2 sy-vline 
WA_COMPOPRB_STR-APLZL2 sy-vline 
WA_COMPOPRB_STR-SUMNR2 sy-vline 
WA_COMPOPRB_STR-APLFL2 sy-vline 
WA_COMPOPRB_STR-PLNFL2 sy-vline 
WA_COMPOPRB_STR-RESULT sy-vline 
WA_COMPOPRB_STR-LOWDIFF sy-vline 
WA_COMPOPRB_STR-CONFTYP sy-vline 
WA_COMPOPRB_STR-STATUS sy-vline 
WA_COMPOPRB_STR-EXKEY sy-vline 
WA_COMPOPRB_STR-LTXA1 sy-vline 
WA_COMPOPRB_STR-AENNR sy-vline 
WA_COMPOPRB_STR-UPDIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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