ABAP Select data from SAP table /TDAG/CPS_ZEHS_WDM_COMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TDAG/CPS_ZEHS_WDM_COMP 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 /TDAG/CPS_ZEHS_WDM_COMP. 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 /TDAG/CPS_ZEHS_WDM_COMP 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_/TDAG/CPS_ZEHS_WDM_COMP TYPE STANDARD TABLE OF /TDAG/CPS_ZEHS_WDM_COMP,
      WA_/TDAG/CPS_ZEHS_WDM_COMP TYPE /TDAG/CPS_ZEHS_WDM_COMP,
      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: </TDAG/CPS_ZEHS_WDM_COMP> TYPE /TDAG/CPS_ZEHS_WDM_COMP.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TDAG/CPS_ZEHS_WDM_COMP
  INTO TABLE IT_/TDAG/CPS_ZEHS_WDM_COMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/CPS_ZEHS_WDM_COMP
*  INTO TABLE @DATA(IT_/TDAG/CPS_ZEHS_WDM_COMP2).
*--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_/TDAG/CPS_ZEHS_WDM_COMP INDEX 1 INTO DATA(WA_/TDAG/CPS_ZEHS_WDM_COMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TDAG/CPS_ZEHS_WDM_COMP ASSIGNING </TDAG/CPS_ZEHS_WDM_COMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/CPS_ZEHS_WDM_COMP>-ZAEHLER = 1.
</TDAG/CPS_ZEHS_WDM_COMP>-KEY = 1.
</TDAG/CPS_ZEHS_WDM_COMP>-KEYROOT = 1.
</TDAG/CPS_ZEHS_WDM_COMP>-TEXT = 1.
</TDAG/CPS_ZEHS_WDM_COMP>-INFO = 1.

ENDLOOP.

LOOP AT IT_/TDAG/CPS_ZEHS_WDM_COMP INTO WA_/TDAG/CPS_ZEHS_WDM_COMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/CPS_ZEHS_WDM_COMP-SUBID, sy-vline,
  WA_/TDAG/CPS_ZEHS_WDM_COMP-SUBCAT, sy-vline,
  WA_/TDAG/CPS_ZEHS_WDM_COMP-MATCAT, sy-vline,
  WA_/TDAG/CPS_ZEHS_WDM_COMP-MATNR, sy-vline,
  WA_/TDAG/CPS_ZEHS_WDM_COMP-TEIL, sy-vline,
  WA_/TDAG/CPS_ZEHS_WDM_COMP-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/CPS_ZEHS_WDM_COMP 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_/TDAG/CPS_ZEHS_WDM_COMP 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_/TDAG/CPS_ZEHS_WDM_COMP INTO WA_/TDAG/CPS_ZEHS_WDM_COMP.


*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 SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_ZEHS_WDM_COMP-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_ZEHS_WDM_COMP-SUBID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field MEINS2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_ZEHS_WDM_COMP-MEINS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_ZEHS_WDM_COMP-MEINS2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UOM_MASS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_ZEHS_WDM_COMP-UOM_MASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_ZEHS_WDM_COMP-UOM_MASS.
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_/TDAG/CPS_ZEHS_WDM_COMP_STR, 
ZAEHLER TYPE STRING,
KEY TYPE STRING,
KEYROOT TYPE STRING,
TEXT TYPE STRING,
INFO TYPE STRING,
SUBID TYPE STRING,
SUBCAT TYPE STRING,
MATCAT TYPE STRING,
MATNR TYPE STRING,
TEIL TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
DIM TYPE STRING,
MEINS2 TYPE STRING,
PROZ_N TYPE STRING,
MENGE_N TYPE STRING,
EBENE TYPE STRING,
MARK TYPE STRING,
RECN_SUB TYPE STRING,
CHANGE TYPE STRING,
MIN TYPE STRING,
MAX TYPE STRING,
KZ_REST TYPE STRING,
PROPOR TYPE STRING,
MASS TYPE STRING,
UOM_MASS TYPE STRING,
PART_PROPOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/CPS_ZEHS_WDM_COMP_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_/TDAG/CPS_ZEHS_WDM_COMP_STR-ZAEHLER sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-KEY sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-KEYROOT sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-TEXT sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-INFO sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-SUBID sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-SUBCAT sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MATCAT sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MATNR sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-TEIL sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MENGE sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MEINS sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-DIM sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MEINS2 sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-PROZ_N sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MENGE_N sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-EBENE sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MARK sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-RECN_SUB sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-CHANGE sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MIN sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MAX sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-KZ_REST sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-PROPOR sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-MASS sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-UOM_MASS sy-vline 
WA_/TDAG/CPS_ZEHS_WDM_COMP_STR-PART_PROPOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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