ABAP Select data from SAP table CWUSKFCAS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CWUSKFCAS
*  INTO TABLE @DATA(IT_CWUSKFCAS2).
*--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_CWUSKFCAS INDEX 1 INTO DATA(WA_CWUSKFCAS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CWUSKFCAS>-MANDT = 1.
<CWUSKFCAS>-STATKEYFIGWHEREUSEDOBJTYPE = 1.
<CWUSKFCAS>-STATISTICALKEYFIGURE = 1.
<CWUSKFCAS>-ALLOCATIONCYCLE = 1.
<CWUSKFCAS>-ALLOCATIONCYCLESEGMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CWUSKFCAS-ALLOCATIONCYCLENAME, sy-vline,
  WA_CWUSKFCAS-SEGMENTNAME, sy-vline,
  WA_CWUSKFCAS-ALLOCATIONPOSTINGTYPE, sy-vline,
  WA_CWUSKFCAS-ALLOCATIONSEGMENTISLOCKED, sy-vline,
  WA_CWUSKFCAS-ALLOCATIONCYCLENAMETEXT, sy-vline,
  WA_CWUSKFCAS-ALLOCATIONTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CWUSKFCAS 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_CWUSKFCAS 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_CWUSKFCAS INTO WA_CWUSKFCAS.


*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 ASSESSMENTCOSTELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CWUSKFCAS-ASSESSMENTCOSTELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWUSKFCAS-ASSESSMENTCOSTELEMENT.
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_CWUSKFCAS_STR, 
MANDT TYPE STRING,
STATKEYFIGWHEREUSEDOBJTYPE TYPE STRING,
STATISTICALKEYFIGURE TYPE STRING,
ALLOCATIONCYCLE TYPE STRING,
ALLOCATIONCYCLESEGMENT TYPE STRING,
ALLOCATIONCYCLENAME TYPE STRING,
SEGMENTNAME TYPE STRING,
ALLOCATIONPOSTINGTYPE TYPE STRING,
ALLOCATIONSEGMENTISLOCKED TYPE STRING,
ALLOCATIONCYCLENAMETEXT TYPE STRING,
ALLOCATIONTYPE TYPE STRING,
ASSESSMENTCOSTELEMENT TYPE STRING,
ALLOCATIONRECEIVERRULE TYPE STRING,
ALLOCATIONCYCLESTARTDATE TYPE STRING,
ALLOCATIONCYCLEENDDATE TYPE STRING,
CONTROLLINGAREA TYPE STRING,
CONTROLLINGAREANAME TYPE STRING,
STATISTICALKEYFIGURENAME TYPE STRING,
ALLOCATIONPOSTINGTYPETEXT TYPE STRING,
ALLOCATIONCONTEXTTYPETEXT TYPE STRING,
ALLOCATIONRECEIVERRULETEXT TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CWUSKFCAS_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_CWUSKFCAS_STR-MANDT sy-vline 
WA_CWUSKFCAS_STR-STATKEYFIGWHEREUSEDOBJTYPE sy-vline 
WA_CWUSKFCAS_STR-STATISTICALKEYFIGURE sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCYCLE sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCYCLESEGMENT sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCYCLENAME sy-vline 
WA_CWUSKFCAS_STR-SEGMENTNAME sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONPOSTINGTYPE sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONSEGMENTISLOCKED sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCYCLENAMETEXT sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONTYPE sy-vline 
WA_CWUSKFCAS_STR-ASSESSMENTCOSTELEMENT sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONRECEIVERRULE sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCYCLESTARTDATE sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCYCLEENDDATE sy-vline 
WA_CWUSKFCAS_STR-CONTROLLINGAREA sy-vline 
WA_CWUSKFCAS_STR-CONTROLLINGAREANAME sy-vline 
WA_CWUSKFCAS_STR-STATISTICALKEYFIGURENAME sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONPOSTINGTYPETEXT sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONCONTEXTTYPETEXT sy-vline 
WA_CWUSKFCAS_STR-ALLOCATIONRECEIVERRULETEXT sy-vline 
WA_CWUSKFCAS_STR-VALIDITYSTARTDATE sy-vline 
WA_CWUSKFCAS_STR-VALIDITYENDDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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