ABAP Select data from SAP table CPPDGWI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPPDGWI
*  INTO TABLE @DATA(IT_CPPDGWI2).
*--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_CPPDGWI INDEX 1 INTO DATA(WA_CPPDGWI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPPDGWI>-MANDT = 1.
<CPPDGWI>-CHMLCMPLNCINFOUUID = 1.
<CPPDGWI>-PRODUCT = 1.
<CPPDGWI>-SITNINSTCEANCHOROBJECTKEY = 1.
<CPPDGWI>-SITNNUMBEROFINSTANCES = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPPDGWI-PRODUCTGROUP, sy-vline,
  WA_CPPDGWI-CHMLCMPLNCINFOCOMBINEDNAME, sy-vline,
  WA_CPPDGWI-PRODUCTNAME, sy-vline,
  WA_CPPDGWI-CHMLCMPLNCINTERNALNAME, sy-vline,
  WA_CPPDGWI-DNGRSGDSRESPUNIT, sy-vline,
  WA_CPPDGWI-CHMLCMPLNCPRODUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPPDGWI 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_CPPDGWI 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_CPPDGWI INTO WA_CPPDGWI.


*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 PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CPPDGWI-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPPDGWI-PRODUCT.
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_CPPDGWI_STR, 
MANDT TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
PRODUCT TYPE STRING,
SITNINSTCEANCHOROBJECTKEY TYPE STRING,
SITNNUMBEROFINSTANCES TYPE STRING,
PRODUCTGROUP TYPE STRING,
CHMLCMPLNCINFOCOMBINEDNAME TYPE STRING,
PRODUCTNAME TYPE STRING,
CHMLCMPLNCINTERNALNAME TYPE STRING,
DNGRSGDSRESPUNIT TYPE STRING,
CHMLCMPLNCPRODUUID TYPE STRING,
NMBROFINPROCESSCMPLRQRSLTS TYPE STRING,
NMBROFRELEASEDCMPLRQRSLTS TYPE STRING,
NMBROFCMPLRQRSLTS TYPE STRING,
DNGRSGOODASSESSMENTPROGRESS TYPE STRING,
NUMBEROFCMPLRQRSLTSASSGDTOME TYPE STRING,
CLASSIFIEDASDANGEROUSGOOD TYPE STRING,
CLASSIFIEDASDANGEROUSGOODNAME TYPE STRING,
DANGEROUSGOODSIDNNUMBER TYPE STRING,
DANGEROUSGOODSPACKINGGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPPDGWI_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_CPPDGWI_STR-MANDT sy-vline 
WA_CPPDGWI_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_CPPDGWI_STR-PRODUCT sy-vline 
WA_CPPDGWI_STR-SITNINSTCEANCHOROBJECTKEY sy-vline 
WA_CPPDGWI_STR-SITNNUMBEROFINSTANCES sy-vline 
WA_CPPDGWI_STR-PRODUCTGROUP sy-vline 
WA_CPPDGWI_STR-CHMLCMPLNCINFOCOMBINEDNAME sy-vline 
WA_CPPDGWI_STR-PRODUCTNAME sy-vline 
WA_CPPDGWI_STR-CHMLCMPLNCINTERNALNAME sy-vline 
WA_CPPDGWI_STR-DNGRSGDSRESPUNIT sy-vline 
WA_CPPDGWI_STR-CHMLCMPLNCPRODUUID sy-vline 
WA_CPPDGWI_STR-NMBROFINPROCESSCMPLRQRSLTS sy-vline 
WA_CPPDGWI_STR-NMBROFRELEASEDCMPLRQRSLTS sy-vline 
WA_CPPDGWI_STR-NMBROFCMPLRQRSLTS sy-vline 
WA_CPPDGWI_STR-DNGRSGOODASSESSMENTPROGRESS sy-vline 
WA_CPPDGWI_STR-NUMBEROFCMPLRQRSLTSASSGDTOME sy-vline 
WA_CPPDGWI_STR-CLASSIFIEDASDANGEROUSGOOD sy-vline 
WA_CPPDGWI_STR-CLASSIFIEDASDANGEROUSGOODNAME sy-vline 
WA_CPPDGWI_STR-DANGEROUSGOODSIDNNUMBER sy-vline 
WA_CPPDGWI_STR-DANGEROUSGOODSPACKINGGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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