ABAP Select data from SAP table ISCOMPD into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISCOMPD 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 ISCOMPD. 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 ISCOMPD 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_ISCOMPD TYPE STANDARD TABLE OF ISCOMPD,
      WA_ISCOMPD TYPE ISCOMPD,
      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: <ISCOMPD> TYPE ISCOMPD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCOMPD
*  INTO TABLE @DATA(IT_ISCOMPD2).
*--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_ISCOMPD INDEX 1 INTO DATA(WA_ISCOMPD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCOMPD>-MANDT = 1.
<ISCOMPD>-RSNUM = 1.
<ISCOMPD>-RSPOS = 1.
<ISCOMPD>-RSART = 1.
<ISCOMPD>-BDART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCOMPD-XLOEK, sy-vline,
  WA_ISCOMPD-XWAOK, sy-vline,
  WA_ISCOMPD-KZEAR, sy-vline,
  WA_ISCOMPD-XFEHL, sy-vline,
  WA_ISCOMPD-MATNR, sy-vline,
  WA_ISCOMPD-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCOMPD 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_ISCOMPD 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_ISCOMPD INTO WA_ISCOMPD.


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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISCOMPD-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISCOMPD-LIFNR.
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_ISCOMPD_STR, 
MANDT TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
BDART TYPE STRING,
XLOEK TYPE STRING,
XWAOK TYPE STRING,
KZEAR TYPE STRING,
XFEHL TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
BDTER TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
SHKZG TYPE STRING,
FMENG TYPE STRING,
ENMNG TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
AUFNR TYPE STRING,
BAUGR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
BWART TYPE STRING,
NAFKZ TYPE STRING,
NOMAT TYPE STRING,
NOMNG TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
ALPOS TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
SBTER TYPE STRING,
VERTI TYPE STRING,
SCHGT TYPE STRING,
AUFST TYPE STRING,
AUFWG TYPE STRING,
BAUST TYPE STRING,
BAUWG TYPE STRING,
KNTTP TYPE STRING,
KZVBR TYPE STRING,
PSPEL TYPE STRING,
AUFPL TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
APLZL TYPE STRING,
FLGAT TYPE STRING,
RGEKZ TYPE STRING,
VMENG TYPE STRING,
PRREG TYPE STRING,
KBNKZ TYPE STRING,
KZKUP TYPE STRING,
BDZTP TYPE STRING,
CHOBJ TYPE STRING,
SPLKZ TYPE STRING,
SPLRV TYPE STRING,
ARBPL TYPE STRING,
ARBTX TYPE STRING,
LTXA1 TYPE STRING,
LIFNR TYPE STRING,
DBSKZ TYPE STRING,
DUMPS TYPE STRING,
TXTPS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCOMPD_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_ISCOMPD_STR-MANDT sy-vline 
WA_ISCOMPD_STR-RSNUM sy-vline 
WA_ISCOMPD_STR-RSPOS sy-vline 
WA_ISCOMPD_STR-RSART sy-vline 
WA_ISCOMPD_STR-BDART sy-vline 
WA_ISCOMPD_STR-XLOEK sy-vline 
WA_ISCOMPD_STR-XWAOK sy-vline 
WA_ISCOMPD_STR-KZEAR sy-vline 
WA_ISCOMPD_STR-XFEHL sy-vline 
WA_ISCOMPD_STR-MATNR sy-vline 
WA_ISCOMPD_STR-WERKS sy-vline 
WA_ISCOMPD_STR-LGORT sy-vline 
WA_ISCOMPD_STR-PRVBE sy-vline 
WA_ISCOMPD_STR-CHARG sy-vline 
WA_ISCOMPD_STR-SOBKZ sy-vline 
WA_ISCOMPD_STR-BDTER sy-vline 
WA_ISCOMPD_STR-BDMNG sy-vline 
WA_ISCOMPD_STR-MEINS sy-vline 
WA_ISCOMPD_STR-SHKZG sy-vline 
WA_ISCOMPD_STR-FMENG sy-vline 
WA_ISCOMPD_STR-ENMNG sy-vline 
WA_ISCOMPD_STR-ERFMG sy-vline 
WA_ISCOMPD_STR-ERFME sy-vline 
WA_ISCOMPD_STR-AUFNR sy-vline 
WA_ISCOMPD_STR-BAUGR sy-vline 
WA_ISCOMPD_STR-KDAUF sy-vline 
WA_ISCOMPD_STR-KDPOS sy-vline 
WA_ISCOMPD_STR-KDEIN sy-vline 
WA_ISCOMPD_STR-BWART sy-vline 
WA_ISCOMPD_STR-NAFKZ sy-vline 
WA_ISCOMPD_STR-NOMAT sy-vline 
WA_ISCOMPD_STR-NOMNG sy-vline 
WA_ISCOMPD_STR-POSTP sy-vline 
WA_ISCOMPD_STR-POSNR sy-vline 
WA_ISCOMPD_STR-ALPOS sy-vline 
WA_ISCOMPD_STR-UMREZ sy-vline 
WA_ISCOMPD_STR-UMREN sy-vline 
WA_ISCOMPD_STR-SBTER sy-vline 
WA_ISCOMPD_STR-VERTI sy-vline 
WA_ISCOMPD_STR-SCHGT sy-vline 
WA_ISCOMPD_STR-AUFST sy-vline 
WA_ISCOMPD_STR-AUFWG sy-vline 
WA_ISCOMPD_STR-BAUST sy-vline 
WA_ISCOMPD_STR-BAUWG sy-vline 
WA_ISCOMPD_STR-KNTTP sy-vline 
WA_ISCOMPD_STR-KZVBR sy-vline 
WA_ISCOMPD_STR-PSPEL sy-vline 
WA_ISCOMPD_STR-AUFPL sy-vline 
WA_ISCOMPD_STR-PLNFL sy-vline 
WA_ISCOMPD_STR-VORNR sy-vline 
WA_ISCOMPD_STR-APLZL sy-vline 
WA_ISCOMPD_STR-FLGAT sy-vline 
WA_ISCOMPD_STR-RGEKZ sy-vline 
WA_ISCOMPD_STR-VMENG sy-vline 
WA_ISCOMPD_STR-PRREG sy-vline 
WA_ISCOMPD_STR-KBNKZ sy-vline 
WA_ISCOMPD_STR-KZKUP sy-vline 
WA_ISCOMPD_STR-BDZTP sy-vline 
WA_ISCOMPD_STR-CHOBJ sy-vline 
WA_ISCOMPD_STR-SPLKZ sy-vline 
WA_ISCOMPD_STR-SPLRV sy-vline 
WA_ISCOMPD_STR-ARBPL sy-vline 
WA_ISCOMPD_STR-ARBTX sy-vline 
WA_ISCOMPD_STR-LTXA1 sy-vline 
WA_ISCOMPD_STR-LIFNR sy-vline 
WA_ISCOMPD_STR-DBSKZ sy-vline 
WA_ISCOMPD_STR-DUMPS sy-vline 
WA_ISCOMPD_STR-TXTPS sy-vline      INTO ld_text SEPARATED BY SPACE.

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