ABAP Select data from SAP table CNPB_OBJECT_KEYS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNPB_OBJECT_KEYS
*  INTO TABLE @DATA(IT_CNPB_OBJECT_KEYS2).
*--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_CNPB_OBJECT_KEYS INDEX 1 INTO DATA(WA_CNPB_OBJECT_KEYS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNPB_OBJECT_KEYS>-PRONR = 1.
<CNPB_OBJECT_KEYS>-PSPNR = 1.
<CNPB_OBJECT_KEYS>-AUFNR = 1.
<CNPB_OBJECT_KEYS>-AUFPL = 1.
<CNPB_OBJECT_KEYS>-APLZL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNPB_OBJECT_KEYS-VORNR, sy-vline,
  WA_CNPB_OBJECT_KEYS-UVORN, sy-vline,
  WA_CNPB_OBJECT_KEYS-RSNUM, sy-vline,
  WA_CNPB_OBJECT_KEYS-RSPOS, sy-vline,
  WA_CNPB_OBJECT_KEYS-RSART, sy-vline,
  WA_CNPB_OBJECT_KEYS-MLST_ZAEHL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNPB_OBJECT_KEYS 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_CNPB_OBJECT_KEYS 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_CNPB_OBJECT_KEYS INTO WA_CNPB_OBJECT_KEYS.


*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 KONPD, internal->external for field PRONR
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-PRONR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-PRONR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field PRPSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-PRPSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-PRPSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AOBAR, internal->external for field AOBAR
CALL FUNCTION 'CONVERSION_EXIT_AOBAR_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-AOBAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-AOBAR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit KONPS, internal->external for field SPRONR
CALL FUNCTION 'CONVERSION_EXIT_KONPS_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-SPRONR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-SPRONR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KONPT, internal->external for field SPSPNR
CALL FUNCTION 'CONVERSION_EXIT_KONPT_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-SPSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-SPSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-PSPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field SPSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-SPSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-SPSPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field SPOSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_OBJECT_KEYS-SPOSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_OBJECT_KEYS-SPOSID.
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_CNPB_OBJECT_KEYS_STR, 
PRONR TYPE STRING,
PSPNR TYPE STRING,
AUFNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
MLST_ZAEHL TYPE STRING,
ZAEHL TYPE STRING,
PZLFH TYPE STRING,
NPAUFPL TYPE STRING,
NPAPLZL TYPE STRING,
NPTXTKY TYPE STRING,
PROBTYP TYPE STRING,
PRPSPNR TYPE STRING,
PRTXTKY TYPE STRING,
AUFPL_VOR TYPE STRING,
APLZL_VOR TYPE STRING,
AUFPL_NCH TYPE STRING,
APLZL_NCH TYPE STRING,
AOBAR TYPE STRING,
MIMAX TYPE STRING,
PLNUM TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
APPNR TYPE STRING,
SPRONR TYPE STRING,
SPSPNR TYPE STRING,
SPLNTY TYPE STRING,
SPLNNR TYPE STRING,
SPLNAL TYPE STRING,
SZAEHL TYPE STRING,
VSNMR TYPE STRING,
PSPID TYPE STRING,
POSID TYPE STRING,
SPSPID TYPE STRING,
SPOSID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNPB_OBJECT_KEYS_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_CNPB_OBJECT_KEYS_STR-PRONR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PSPNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-AUFNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-AUFPL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-APLZL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-VORNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-UVORN sy-vline 
WA_CNPB_OBJECT_KEYS_STR-RSNUM sy-vline 
WA_CNPB_OBJECT_KEYS_STR-RSPOS sy-vline 
WA_CNPB_OBJECT_KEYS_STR-RSART sy-vline 
WA_CNPB_OBJECT_KEYS_STR-MLST_ZAEHL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-ZAEHL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PZLFH sy-vline 
WA_CNPB_OBJECT_KEYS_STR-NPAUFPL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-NPAPLZL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-NPTXTKY sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PROBTYP sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PRPSPNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PRTXTKY sy-vline 
WA_CNPB_OBJECT_KEYS_STR-AUFPL_VOR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-APLZL_VOR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-AUFPL_NCH sy-vline 
WA_CNPB_OBJECT_KEYS_STR-APLZL_NCH sy-vline 
WA_CNPB_OBJECT_KEYS_STR-AOBAR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-MIMAX sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PLNUM sy-vline 
WA_CNPB_OBJECT_KEYS_STR-DOKAR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-DOKNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-DOKVR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-DOKTL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-APPNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPRONR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPSPNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPLNTY sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPLNNR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPLNAL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SZAEHL sy-vline 
WA_CNPB_OBJECT_KEYS_STR-VSNMR sy-vline 
WA_CNPB_OBJECT_KEYS_STR-PSPID sy-vline 
WA_CNPB_OBJECT_KEYS_STR-POSID sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPSPID sy-vline 
WA_CNPB_OBJECT_KEYS_STR-SPOSID sy-vline      INTO ld_text SEPARATED BY SPACE.

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