ABAP Select data from SAP table WORKLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WORKLIST
*  INTO TABLE @DATA(IT_WORKLIST2).
*--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_WORKLIST INDEX 1 INTO DATA(WA_WORKLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WORKLIST>-WLHID = 1.
<WORKLIST>-TITLE = 1.
<WORKLIST>-TEXT = 1.
<WORKLIST>-TILE_ID = 1.
<WORKLIST>-REFSE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WORKLIST-APPTYPE, sy-vline,
  WA_WORKLIST-PRIOY, sy-vline,
  WA_WORKLIST-DUEDT, sy-vline,
  WA_WORKLIST-ACTON, sy-vline,
  WA_WORKLIST-WAERS, sy-vline,
  WA_WORKLIST-LISTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WORKLIST 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_WORKLIST 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_WORKLIST INTO WA_WORKLIST.


*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 WLHID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WORKLIST-WLHID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WORKLIST-WLHID.
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_WORKLIST_STR, 
WLHID TYPE STRING,
TITLE TYPE STRING,
TEXT TYPE STRING,
TILE_ID TYPE STRING,
REFSE TYPE STRING,
APPTYPE TYPE STRING,
PRIOY TYPE STRING,
DUEDT TYPE STRING,
ACTON TYPE STRING,
WAERS TYPE STRING,
LISTTYPE TYPE STRING,
FILTER TYPE STRING,
ITEMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WORKLIST_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_WORKLIST_STR-WLHID sy-vline 
WA_WORKLIST_STR-TITLE sy-vline 
WA_WORKLIST_STR-TEXT sy-vline 
WA_WORKLIST_STR-TILE_ID sy-vline 
WA_WORKLIST_STR-REFSE sy-vline 
WA_WORKLIST_STR-APPTYPE sy-vline 
WA_WORKLIST_STR-PRIOY sy-vline 
WA_WORKLIST_STR-DUEDT sy-vline 
WA_WORKLIST_STR-ACTON sy-vline 
WA_WORKLIST_STR-WAERS sy-vline 
WA_WORKLIST_STR-LISTTYPE sy-vline 
WA_WORKLIST_STR-FILTER sy-vline 
WA_WORKLIST_STR-ITEMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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