ABAP Select data from SAP table CWORKFLOWTASK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CWORKFLOWTASK
*  INTO TABLE @DATA(IT_CWORKFLOWTASK2).
*--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_CWORKFLOWTASK INDEX 1 INTO DATA(WA_CWORKFLOWTASK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CWORKFLOWTASK>-MANDT = 1.
<CWORKFLOWTASK>-WORKFLOWTASKINTERNALID = 1.
<CWORKFLOWTASK>-LANGUAGE = 1.
<CWORKFLOWTASK>-TASKLEADINGOBJECTCATEGORY = 1.
<CWORKFLOWTASK>-TASKLEADINGOBJECTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CWORKFLOWTASK-TASKLEADINGOBJECTINSTANCE, sy-vline,
  WA_CWORKFLOWTASK-LANGUAGEISOCODE, sy-vline,
  WA_CWORKFLOWTASK-LANGUAGETEXT, sy-vline,
  WA_CWORKFLOWTASK-TASKNAME, sy-vline,
  WA_CWORKFLOWTASK-WORKFLOWTASKTYPE, sy-vline,
  WA_CWORKFLOWTASK-TASKTYPETEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CWORKFLOWTASK 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_CWORKFLOWTASK 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_CWORKFLOWTASK INTO WA_CWORKFLOWTASK.


*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 ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CWORKFLOWTASK-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWORKFLOWTASK-LANGUAGE.
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_CWORKFLOWTASK_STR, 
MANDT TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
LANGUAGE TYPE STRING,
TASKLEADINGOBJECTCATEGORY TYPE STRING,
TASKLEADINGOBJECTTYPE TYPE STRING,
TASKLEADINGOBJECTINSTANCE TYPE STRING,
LANGUAGEISOCODE TYPE STRING,
LANGUAGETEXT TYPE STRING,
TASKNAME TYPE STRING,
WORKFLOWTASKTYPE TYPE STRING,
TASKTYPETEXT TYPE STRING,
TASKPRIORITY TYPE STRING,
TASKPRIORITYTEXT TYPE STRING,
TASKSTATUS TYPE STRING,
TASKSTATUSTEXT TYPE STRING,
TASKCREATEUTCDATETIME TYPE STRING,
TASKCOMPLETIONUTCDATETIME TYPE STRING,
TOPLEVELTASK TYPE STRING,
PARENTTASK TYPE STRING,
TASKCREATEDBYUSER TYPE STRING,
TASKCURRENTUSER TYPE STRING,
TASKDEFINITION TYPE STRING,
TOPLEVELTASKDEFINITION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CWORKFLOWTASK_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_CWORKFLOWTASK_STR-MANDT sy-vline 
WA_CWORKFLOWTASK_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_CWORKFLOWTASK_STR-LANGUAGE sy-vline 
WA_CWORKFLOWTASK_STR-TASKLEADINGOBJECTCATEGORY sy-vline 
WA_CWORKFLOWTASK_STR-TASKLEADINGOBJECTTYPE sy-vline 
WA_CWORKFLOWTASK_STR-TASKLEADINGOBJECTINSTANCE sy-vline 
WA_CWORKFLOWTASK_STR-LANGUAGEISOCODE sy-vline 
WA_CWORKFLOWTASK_STR-LANGUAGETEXT sy-vline 
WA_CWORKFLOWTASK_STR-TASKNAME sy-vline 
WA_CWORKFLOWTASK_STR-WORKFLOWTASKTYPE sy-vline 
WA_CWORKFLOWTASK_STR-TASKTYPETEXT sy-vline 
WA_CWORKFLOWTASK_STR-TASKPRIORITY sy-vline 
WA_CWORKFLOWTASK_STR-TASKPRIORITYTEXT sy-vline 
WA_CWORKFLOWTASK_STR-TASKSTATUS sy-vline 
WA_CWORKFLOWTASK_STR-TASKSTATUSTEXT sy-vline 
WA_CWORKFLOWTASK_STR-TASKCREATEUTCDATETIME sy-vline 
WA_CWORKFLOWTASK_STR-TASKCOMPLETIONUTCDATETIME sy-vline 
WA_CWORKFLOWTASK_STR-TOPLEVELTASK sy-vline 
WA_CWORKFLOWTASK_STR-PARENTTASK sy-vline 
WA_CWORKFLOWTASK_STR-TASKCREATEDBYUSER sy-vline 
WA_CWORKFLOWTASK_STR-TASKCURRENTUSER sy-vline 
WA_CWORKFLOWTASK_STR-TASKDEFINITION sy-vline 
WA_CWORKFLOWTASK_STR-TOPLEVELTASKDEFINITION sy-vline      INTO ld_text SEPARATED BY SPACE.

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