ABAP Select data from SAP table COM_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COM_DATA
*  INTO TABLE @DATA(IT_COM_DATA2).
*--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_COM_DATA INDEX 1 INTO DATA(WA_COM_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COM_DATA>-MANDT = 1.
<COM_DATA>-PLNTY = 1.
<COM_DATA>-PLNNR = 1.
<COM_DATA>-ZUONR = 1.
<COM_DATA>-ZAEHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COM_DATA-DATUV, sy-vline,
  WA_COM_DATA-TECHV, sy-vline,
  WA_COM_DATA-AENNR, sy-vline,
  WA_COM_DATA-LOEKZ, sy-vline,
  WA_COM_DATA-PARKZ, sy-vline,
  WA_COM_DATA-PLNAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COM_DATA 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_COM_DATA 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_COM_DATA INTO WA_COM_DATA.


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field IDNRK
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_COM_DATA-IDNRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COM_DATA-IDNRK.
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_COM_DATA_STR, 
MANDT TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
ZUONR TYPE STRING,
ZAEHL TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
AENNR TYPE STRING,
LOEKZ TYPE STRING,
PARKZ TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
PLNKN TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
STLKN TYPE STRING,
WERK_STL TYPE STRING,
ZUDIV TYPE STRING,
ZUMS1 TYPE STRING,
ZUMS2 TYPE STRING,
ZUMS3 TYPE STRING,
ZUMEI TYPE STRING,
IMENG TYPE STRING,
IMEIN TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
RGEKZ TYPE STRING,
STLST TYPE STRING,
STLWG TYPE STRING,
REFKN TYPE STRING,
GP_MATNR TYPE STRING,
GP_WERKS TYPE STRING,
GP_UVORN TYPE STRING,
GP_KRIT1 TYPE STRING,
GP_FREET TYPE STRING,
AOBAR TYPE STRING,
ZEINH TYPE STRING,
DAUER TYPE STRING,
DMENG TYPE STRING,
KNTTP TYPE STRING,
FLGEX TYPE STRING,
VORAB TYPE STRING,
STRECKE TYPE STRING,
STLTY_W TYPE STRING,
STLNR_W TYPE STRING,
STLAL_W TYPE STRING,
KANTE TYPE STRING,
LGORT TYPE STRING,
DISP TYPE STRING,
PRODFLOWID TYPE STRING,
BEIKZ TYPE STRING,
ABLAD TYPE STRING,
WEMPF TYPE STRING,
VALID_TO TYPE STRING,
LOEKZ_INHERITED TYPE STRING,
VERSN TYPE STRING,
VERSN_SOURCE TYPE STRING,
VERSN_SOURCE_ZUONR TYPE STRING,
BOM_VERSN TYPE STRING,
BOM_VERSN_W TYPE STRING,
LOG_COMP TYPE STRING,
VPLTY TYPE STRING,
VPLNR TYPE STRING,
VPLAL TYPE STRING,
IDENT TYPE STRING,
IDENT_REF TYPE STRING,
HERKUNFT TYPE STRING,
DATUB TYPE STRING,
AENNR_AUS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
MAKTX TYPE STRING,
POSNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
IUPOS TYPE STRING,
IEBOR TYPE STRING,
BOMAT TYPE STRING,
DBSKZ TYPE STRING,
IDNRK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COM_DATA_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_COM_DATA_STR-MANDT sy-vline 
WA_COM_DATA_STR-PLNTY sy-vline 
WA_COM_DATA_STR-PLNNR sy-vline 
WA_COM_DATA_STR-ZUONR sy-vline 
WA_COM_DATA_STR-ZAEHL sy-vline 
WA_COM_DATA_STR-DATUV sy-vline 
WA_COM_DATA_STR-TECHV sy-vline 
WA_COM_DATA_STR-AENNR sy-vline 
WA_COM_DATA_STR-LOEKZ sy-vline 
WA_COM_DATA_STR-PARKZ sy-vline 
WA_COM_DATA_STR-PLNAL sy-vline 
WA_COM_DATA_STR-PLNFL sy-vline 
WA_COM_DATA_STR-PLNKN sy-vline 
WA_COM_DATA_STR-STLTY sy-vline 
WA_COM_DATA_STR-STLNR sy-vline 
WA_COM_DATA_STR-STLAL sy-vline 
WA_COM_DATA_STR-STLKN sy-vline 
WA_COM_DATA_STR-WERK_STL sy-vline 
WA_COM_DATA_STR-ZUDIV sy-vline 
WA_COM_DATA_STR-ZUMS1 sy-vline 
WA_COM_DATA_STR-ZUMS2 sy-vline 
WA_COM_DATA_STR-ZUMS3 sy-vline 
WA_COM_DATA_STR-ZUMEI sy-vline 
WA_COM_DATA_STR-IMENG sy-vline 
WA_COM_DATA_STR-IMEIN sy-vline 
WA_COM_DATA_STR-ANDAT sy-vline 
WA_COM_DATA_STR-ANNAM sy-vline 
WA_COM_DATA_STR-AEDAT sy-vline 
WA_COM_DATA_STR-AENAM sy-vline 
WA_COM_DATA_STR-RGEKZ sy-vline 
WA_COM_DATA_STR-STLST sy-vline 
WA_COM_DATA_STR-STLWG sy-vline 
WA_COM_DATA_STR-REFKN sy-vline 
WA_COM_DATA_STR-GP_MATNR sy-vline 
WA_COM_DATA_STR-GP_WERKS sy-vline 
WA_COM_DATA_STR-GP_UVORN sy-vline 
WA_COM_DATA_STR-GP_KRIT1 sy-vline 
WA_COM_DATA_STR-GP_FREET sy-vline 
WA_COM_DATA_STR-AOBAR sy-vline 
WA_COM_DATA_STR-ZEINH sy-vline 
WA_COM_DATA_STR-DAUER sy-vline 
WA_COM_DATA_STR-DMENG sy-vline 
WA_COM_DATA_STR-KNTTP sy-vline 
WA_COM_DATA_STR-FLGEX sy-vline 
WA_COM_DATA_STR-VORAB sy-vline 
WA_COM_DATA_STR-STRECKE sy-vline 
WA_COM_DATA_STR-STLTY_W sy-vline 
WA_COM_DATA_STR-STLNR_W sy-vline 
WA_COM_DATA_STR-STLAL_W sy-vline 
WA_COM_DATA_STR-KANTE sy-vline 
WA_COM_DATA_STR-LGORT sy-vline 
WA_COM_DATA_STR-DISP sy-vline 
WA_COM_DATA_STR-PRODFLOWID sy-vline 
WA_COM_DATA_STR-BEIKZ sy-vline 
WA_COM_DATA_STR-ABLAD sy-vline 
WA_COM_DATA_STR-WEMPF sy-vline 
WA_COM_DATA_STR-VALID_TO sy-vline 
WA_COM_DATA_STR-LOEKZ_INHERITED sy-vline 
WA_COM_DATA_STR-VERSN sy-vline 
WA_COM_DATA_STR-VERSN_SOURCE sy-vline 
WA_COM_DATA_STR-VERSN_SOURCE_ZUONR sy-vline 
WA_COM_DATA_STR-BOM_VERSN sy-vline 
WA_COM_DATA_STR-BOM_VERSN_W sy-vline 
WA_COM_DATA_STR-LOG_COMP sy-vline 
WA_COM_DATA_STR-VPLTY sy-vline 
WA_COM_DATA_STR-VPLNR sy-vline 
WA_COM_DATA_STR-VPLAL sy-vline 
WA_COM_DATA_STR-IDENT sy-vline 
WA_COM_DATA_STR-IDENT_REF sy-vline 
WA_COM_DATA_STR-HERKUNFT sy-vline 
WA_COM_DATA_STR-DATUB sy-vline 
WA_COM_DATA_STR-AENNR_AUS sy-vline 
WA_COM_DATA_STR-MATNR sy-vline 
WA_COM_DATA_STR-WERKS sy-vline 
WA_COM_DATA_STR-MAKTX sy-vline 
WA_COM_DATA_STR-POSNR sy-vline 
WA_COM_DATA_STR-MENGE sy-vline 
WA_COM_DATA_STR-MEINS sy-vline 
WA_COM_DATA_STR-IUPOS sy-vline 
WA_COM_DATA_STR-IEBOR sy-vline 
WA_COM_DATA_STR-BOMAT sy-vline 
WA_COM_DATA_STR-DBSKZ sy-vline 
WA_COM_DATA_STR-IDNRK sy-vline      INTO ld_text SEPARATED BY SPACE.

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