ABAP Select data from SAP table WFDSS_UI_ASSIGNMENT_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFDSS_UI_ASSIGNMENT_LIST
*  INTO TABLE @DATA(IT_WFDSS_UI_ASSIGNMENT_LIST2).
*--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_WFDSS_UI_ASSIGNMENT_LIST INDEX 1 INTO DATA(WA_WFDSS_UI_ASSIGNMENT_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFDSS_UI_ASSIGNMENT_LIST>-ASSIGNMENT_GUID = 1.
<WFDSS_UI_ASSIGNMENT_LIST>-RESOURCE_GUID = 1.
<WFDSS_UI_ASSIGNMENT_LIST>-DEMAND_GUID = 1.
<WFDSS_UI_ASSIGNMENT_LIST>-RESOURCE_DESC = 1.
<WFDSS_UI_ASSIGNMENT_LIST>-DEMAND_DESC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFDSS_UI_ASSIGNMENT_LIST-DEMAND_ID_AS_STRING, sy-vline,
  WA_WFDSS_UI_ASSIGNMENT_LIST-DEMAND_TYPE, sy-vline,
  WA_WFDSS_UI_ASSIGNMENT_LIST-DEMAND_TYPE_AS_STRING, sy-vline,
  WA_WFDSS_UI_ASSIGNMENT_LIST-DEMAND_ORIGIN_GUID, sy-vline,
  WA_WFDSS_UI_ASSIGNMENT_LIST-DEMAND_ORIGIN_DESCRIPTION, sy-vline,
  WA_WFDSS_UI_ASSIGNMENT_LIST-FROM_TIMESTAMP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFDSS_UI_ASSIGNMENT_LIST 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_WFDSS_UI_ASSIGNMENT_LIST 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_WFDSS_UI_ASSIGNMENT_LIST INTO WA_WFDSS_UI_ASSIGNMENT_LIST.


*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 TSTPS, internal->external for field FROM_TIMESTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_WFDSS_UI_ASSIGNMENT_LIST-FROM_TIMESTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFDSS_UI_ASSIGNMENT_LIST-FROM_TIMESTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field TO_TIMESTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_WFDSS_UI_ASSIGNMENT_LIST-TO_TIMESTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFDSS_UI_ASSIGNMENT_LIST-TO_TIMESTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DURATION_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WFDSS_UI_ASSIGNMENT_LIST-DURATION_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFDSS_UI_ASSIGNMENT_LIST-DURATION_UNIT.
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_WFDSS_UI_ASSIGNMENT_LIST_STR, 
ASSIGNMENT_GUID TYPE STRING,
RESOURCE_GUID TYPE STRING,
DEMAND_GUID TYPE STRING,
RESOURCE_DESC TYPE STRING,
DEMAND_DESC TYPE STRING,
DEMAND_ID_AS_STRING TYPE STRING,
DEMAND_TYPE TYPE STRING,
DEMAND_TYPE_AS_STRING TYPE STRING,
DEMAND_ORIGIN_GUID TYPE STRING,
DEMAND_ORIGIN_DESCRIPTION TYPE STRING,
FROM_TIMESTAMP TYPE STRING,
FROM_AS_STRING TYPE STRING,
TO_TIMESTAMP TYPE STRING,
TO_AS_STRING TYPE STRING,
BEGIN_DATE TYPE STRING,
END_DATE TYPE STRING,
BEGIN_TIME TYPE STRING,
END_TIME TYPE STRING,
BEGIN_TIME_AS_STRING TYPE STRING,
END_TIME_AS_STRING TYPE STRING,
DURATION TYPE STRING,
DURATION_UNIT TYPE STRING,
DURATION_IN_SEC TYPE STRING,
DURATION_AS_STRING TYPE STRING,
ASSIGNMENT_TYPE TYPE STRING,
BOOKING_TYPE TYPE STRING,
BTYPE_AS_STRING TYPE STRING,
PART_OF_RULE TYPE STRING,
REFINED TYPE STRING,
GROUPWARE_SENT TYPE STRING,
SUBJECT TYPE STRING,
GW_DESCRIPTION TYPE STRING,
ASSIGNMENT_NOTE TYPE STRING,
NOTE_FLAG TYPE STRING,
HAS_INVALID_FIELDS TYPE STRING,
OPERA TYPE STRING,
RES_AUTH_DISPLAY TYPE STRING,
STATUS TYPE STRING,
STATUS_AS_STRING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFDSS_UI_ASSIGNMENT_LIST_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_WFDSS_UI_ASSIGNMENT_LIST_STR-ASSIGNMENT_GUID sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-RESOURCE_GUID sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_GUID sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-RESOURCE_DESC sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_DESC sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_ID_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_TYPE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_TYPE_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_ORIGIN_GUID sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DEMAND_ORIGIN_DESCRIPTION sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-FROM_TIMESTAMP sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-FROM_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-TO_TIMESTAMP sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-TO_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-BEGIN_DATE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-END_DATE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-BEGIN_TIME sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-END_TIME sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-BEGIN_TIME_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-END_TIME_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DURATION sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DURATION_UNIT sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DURATION_IN_SEC sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-DURATION_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-ASSIGNMENT_TYPE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-BOOKING_TYPE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-BTYPE_AS_STRING sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-PART_OF_RULE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-REFINED sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-GROUPWARE_SENT sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-SUBJECT sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-GW_DESCRIPTION sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-ASSIGNMENT_NOTE sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-NOTE_FLAG sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-HAS_INVALID_FIELDS sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-OPERA sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-RES_AUTH_DISPLAY sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-STATUS sy-vline 
WA_WFDSS_UI_ASSIGNMENT_LIST_STR-STATUS_AS_STRING sy-vline      INTO ld_text SEPARATED BY SPACE.

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