ABAP Select data from SAP table CWFTSKCLSDMM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CWFTSKCLSDMM
*  INTO TABLE @DATA(IT_CWFTSKCLSDMM2).
*--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_CWFTSKCLSDMM INDEX 1 INTO DATA(WA_CWFTSKCLSDMM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CWFTSKCLSDMM>-MANDT = 1.
<CWFTSKCLSDMM>-WORKFLOWTASKINTERNALID = 1.
<CWFTSKCLSDMM>-WORKFLOWORGLOBJECTTYPE = 1.
<CWFTSKCLSDMM>-WORKFLOWORGLOBJECT = 1.
<CWFTSKCLSDMM>-MDGOVCHGREQACTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CWFTSKCLSDMM-CREATIONDATE, sy-vline,
  WA_CWFTSKCLSDMM-CREATIONDATETIME, sy-vline,
  WA_CWFTSKCLSDMM-MDGOVCHGREQWRKFLWTSKCRTNYEAR, sy-vline,
  WA_CWFTSKCLSDMM-MDGOVCHGREQWRKFLWTSKCRTNMONTH, sy-vline,
  WA_CWFTSKCLSDMM-MDGOVWRKFLWTSKCOMPLTNMONTH, sy-vline,
  WA_CWFTSKCLSDMM-MDGOVWRKFLWTSKCOMPLTNYEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CWFTSKCLSDMM 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_CWFTSKCLSDMM 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_CWFTSKCLSDMM INTO WA_CWFTSKCLSDMM.


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

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

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

*Conversion exit CUNIT, internal->external for field MDGOVCHGREQWRKFLWTSKHOURUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CWFTSKCLSDMM-MDGOVCHGREQWRKFLWTSKHOURUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWFTSKCLSDMM-MDGOVCHGREQWRKFLWTSKHOURUNIT.
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_CWFTSKCLSDMM_STR, 
MANDT TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
WORKFLOWORGLOBJECTTYPE TYPE STRING,
WORKFLOWORGLOBJECT TYPE STRING,
MDGOVCHGREQACTION TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONDATETIME TYPE STRING,
MDGOVCHGREQWRKFLWTSKCRTNYEAR TYPE STRING,
MDGOVCHGREQWRKFLWTSKCRTNMONTH TYPE STRING,
MDGOVWRKFLWTSKCOMPLTNMONTH TYPE STRING,
MDGOVWRKFLWTSKCOMPLTNYEAR TYPE STRING,
MDGOVCHGREQWRKFLWTSKCOMPLTNDTE TYPE STRING,
MDGOVWRKFLWTSKPROCGDAYSINTVL TYPE STRING,
MDGOVWRKFLWTSKPROCGHRSINTVL TYPE STRING,
MDGOVWRKFLWTSKWRKDAYSINTVL TYPE STRING,
MDGOVCHANGEREQUEST TYPE STRING,
MDGOVCHGREQSTEP TYPE STRING,
MDGOVCHGREQTYPE TYPE STRING,
MDGOVCHGREQSTATUS TYPE STRING,
MDGOVDATAMODEL TYPE STRING,
MDGOVCHGREQCREATIONDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
MDGOVCHGREQCREATIONDATE TYPE STRING,
MDGOVBUSINESSACTIVITY TYPE STRING,
BUSINESSOBJECTTYPE TYPE STRING,
MDGOVCHGREQNMBROFWRKFLWTSKS TYPE STRING,
MDGOVCHGREQWRKFLWTSKDAYUNIT TYPE STRING,
MDGOVCHGREQWRKFLWTSKHOURUNIT TYPE STRING,
MDGOVWRKFLWTSKAVGPROCGDURN TYPE STRING,
MDGOVWRKFLWTSKAVGPROCGHRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CWFTSKCLSDMM_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_CWFTSKCLSDMM_STR-MANDT sy-vline 
WA_CWFTSKCLSDMM_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_CWFTSKCLSDMM_STR-WORKFLOWORGLOBJECTTYPE sy-vline 
WA_CWFTSKCLSDMM_STR-WORKFLOWORGLOBJECT sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQACTION sy-vline 
WA_CWFTSKCLSDMM_STR-CREATIONDATE sy-vline 
WA_CWFTSKCLSDMM_STR-CREATIONDATETIME sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQWRKFLWTSKCRTNYEAR sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQWRKFLWTSKCRTNMONTH sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKCOMPLTNMONTH sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKCOMPLTNYEAR sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQWRKFLWTSKCOMPLTNDTE sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKPROCGDAYSINTVL sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKPROCGHRSINTVL sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKWRKDAYSINTVL sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHANGEREQUEST sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQSTEP sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQTYPE sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQSTATUS sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVDATAMODEL sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQCREATIONDATETIME sy-vline 
WA_CWFTSKCLSDMM_STR-CREATEDBYUSER sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQCREATIONDATE sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVBUSINESSACTIVITY sy-vline 
WA_CWFTSKCLSDMM_STR-BUSINESSOBJECTTYPE sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQNMBROFWRKFLWTSKS sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQWRKFLWTSKDAYUNIT sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVCHGREQWRKFLWTSKHOURUNIT sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKAVGPROCGDURN sy-vline 
WA_CWFTSKCLSDMM_STR-MDGOVWRKFLWTSKAVGPROCGHRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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