ABAP Select data from SAP table CDCPRDSTG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDCPRDSTG
*  INTO TABLE @DATA(IT_CDCPRDSTG2).
*--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_CDCPRDSTG INDEX 1 INTO DATA(WA_CDCPRDSTG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDCPRDSTG>-MANDT = 1.
<CDCPRDSTG>-COMPANYCODE = 1.
<CDCPRDSTG>-MASTERFIXEDASSET = 1.
<CDCPRDSTG>-FIXEDASSET = 1.
<CDCPRDSTG>-ASSETDEPRECIATIONAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDCPRDSTG-FISCALYEAR, sy-vline,
  WA_CDCPRDSTG-DEPRECIATIONCALCVALUETYPE, sy-vline,
  WA_CDCPRDSTG-CURRENCYROLE, sy-vline,
  WA_CDCPRDSTG-TOFISCALPERIOD, sy-vline,
  WA_CDCPRDSTG-USEFULLIFEINPERIODS, sy-vline,
  WA_CDCPRDSTG-EXPIREDUSEFULLIFEINPERDS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDCPRDSTG 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_CDCPRDSTG 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_CDCPRDSTG INTO WA_CDCPRDSTG.


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

*Conversion exit ALPHA, internal->external for field FIXEDASSET
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDCPRDSTG-FIXEDASSET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDCPRDSTG-FIXEDASSET.
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_CDCPRDSTG_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
MASTERFIXEDASSET TYPE STRING,
FIXEDASSET TYPE STRING,
ASSETDEPRECIATIONAREA TYPE STRING,
FISCALYEAR TYPE STRING,
DEPRECIATIONCALCVALUETYPE TYPE STRING,
CURRENCYROLE TYPE STRING,
TOFISCALPERIOD TYPE STRING,
USEFULLIFEINPERIODS TYPE STRING,
EXPIREDUSEFULLIFEINPERDS TYPE STRING,
CHGOVRYREXPIREDUSFLLIFEINPERDS TYPE STRING,
EXPIREDUSEFULLIFEINTIMESEGMENT TYPE STRING,
NUMBEROFWEIGHTEDPERDSINFSCLYR TYPE STRING,
NUMBEROFPERIODSINFISCALYEAR TYPE STRING,
NUMBEROFPERIODSINSHORTFISCALYR TYPE STRING,
NUMBEROFWEIGHTEDPERDSINTMESGMT TYPE STRING,
SHORTENEDFISCALYEARISIGNORED TYPE STRING,
DEPRKEYCHANGEOVERYEAR TYPE STRING,
DEPRKEYCHANGEOVERPERIOD TYPE STRING,
HALFPERIODISUSED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDCPRDSTG_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_CDCPRDSTG_STR-MANDT sy-vline 
WA_CDCPRDSTG_STR-COMPANYCODE sy-vline 
WA_CDCPRDSTG_STR-MASTERFIXEDASSET sy-vline 
WA_CDCPRDSTG_STR-FIXEDASSET sy-vline 
WA_CDCPRDSTG_STR-ASSETDEPRECIATIONAREA sy-vline 
WA_CDCPRDSTG_STR-FISCALYEAR sy-vline 
WA_CDCPRDSTG_STR-DEPRECIATIONCALCVALUETYPE sy-vline 
WA_CDCPRDSTG_STR-CURRENCYROLE sy-vline 
WA_CDCPRDSTG_STR-TOFISCALPERIOD sy-vline 
WA_CDCPRDSTG_STR-USEFULLIFEINPERIODS sy-vline 
WA_CDCPRDSTG_STR-EXPIREDUSEFULLIFEINPERDS sy-vline 
WA_CDCPRDSTG_STR-CHGOVRYREXPIREDUSFLLIFEINPERDS sy-vline 
WA_CDCPRDSTG_STR-EXPIREDUSEFULLIFEINTIMESEGMENT sy-vline 
WA_CDCPRDSTG_STR-NUMBEROFWEIGHTEDPERDSINFSCLYR sy-vline 
WA_CDCPRDSTG_STR-NUMBEROFPERIODSINFISCALYEAR sy-vline 
WA_CDCPRDSTG_STR-NUMBEROFPERIODSINSHORTFISCALYR sy-vline 
WA_CDCPRDSTG_STR-NUMBEROFWEIGHTEDPERDSINTMESGMT sy-vline 
WA_CDCPRDSTG_STR-SHORTENEDFISCALYEARISIGNORED sy-vline 
WA_CDCPRDSTG_STR-DEPRKEYCHANGEOVERYEAR sy-vline 
WA_CDCPRDSTG_STR-DEPRKEYCHANGEOVERPERIOD sy-vline 
WA_CDCPRDSTG_STR-HALFPERIODISUSED sy-vline      INTO ld_text SEPARATED BY SPACE.

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