ABAP Select data from SAP table CWCUTILPERIODS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CWCUTILPERIODS
*  INTO TABLE @DATA(IT_CWCUTILPERIODS2).
*--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_CWCUTILPERIODS INDEX 1 INTO DATA(WA_CWCUTILPERIODS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CWCUTILPERIODS>-MANDT = 1.
<CWCUTILPERIODS>-WORKCENTERINTERNALID = 1.
<CWCUTILPERIODS>-WORKCENTERTYPECODE = 1.
<CWCUTILPERIODS>-WRKCTRUTILZNPERDSTARTDATETIME = 1.
<CWCUTILPERIODS>-WORKCENTER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CWCUTILPERIODS-PLANT, sy-vline,
  WA_CWCUTILPERIODS-WORKCENTERCATEGORYCODE, sy-vline,
  WA_CWCUTILPERIODS-WRKCTRUTILZNPERDENDDATETIME, sy-vline,
  WA_CWCUTILPERIODS-WORKCENTERAVAILABLECAPACITY, sy-vline,
  WA_CWCUTILPERIODS-WORKCENTERREQUIREDCAPACITY, sy-vline,
  WA_CWCUTILPERIODS-WORKCENTERCAPACITYUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CWCUTILPERIODS 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_CWCUTILPERIODS 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_CWCUTILPERIODS INTO WA_CWCUTILPERIODS.


*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 CUNIT, internal->external for field WORKCENTERCAPACITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CWCUTILPERIODS-WORKCENTERCAPACITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWCUTILPERIODS-WORKCENTERCAPACITYUNIT.
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_CWCUTILPERIODS_STR, 
MANDT TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
WRKCTRUTILZNPERDSTARTDATETIME TYPE STRING,
WORKCENTER TYPE STRING,
PLANT TYPE STRING,
WORKCENTERCATEGORYCODE TYPE STRING,
WRKCTRUTILZNPERDENDDATETIME TYPE STRING,
WORKCENTERAVAILABLECAPACITY TYPE STRING,
WORKCENTERREQUIREDCAPACITY TYPE STRING,
WORKCENTERCAPACITYUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CWCUTILPERIODS_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_CWCUTILPERIODS_STR-MANDT sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTERINTERNALID sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTERTYPECODE sy-vline 
WA_CWCUTILPERIODS_STR-WRKCTRUTILZNPERDSTARTDATETIME sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTER sy-vline 
WA_CWCUTILPERIODS_STR-PLANT sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTERCATEGORYCODE sy-vline 
WA_CWCUTILPERIODS_STR-WRKCTRUTILZNPERDENDDATETIME sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTERAVAILABLECAPACITY sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTERREQUIREDCAPACITY sy-vline 
WA_CWCUTILPERIODS_STR-WORKCENTERCAPACITYUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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