ABAP Select data from SAP table WFDSS_UI_USER_SPECIFIC_SETTING 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_USER_SPECIFIC_SETTING 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_USER_SPECIFIC_SETTING. 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_USER_SPECIFIC_SETTING 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_USER_SPECIFIC_SETTING TYPE STANDARD TABLE OF WFDSS_UI_USER_SPECIFIC_SETTING,
      WA_WFDSS_UI_USER_SPECIFIC_SETTING TYPE WFDSS_UI_USER_SPECIFIC_SETTING,
      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_USER_SPECIFIC_SETTING> TYPE WFDSS_UI_USER_SPECIFIC_SETTING.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFDSS_UI_USER_SPECIFIC_SETTING
*  INTO TABLE @DATA(IT_WFDSS_UI_USER_SPECIFIC_SETTING2).
*--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_USER_SPECIFIC_SETTING INDEX 1 INTO DATA(WA_WFDSS_UI_USER_SPECIFIC_SETTING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFDSS_UI_USER_SPECIFIC_SETTING>-RESOURCE_TRAY = 1.
<WFDSS_UI_USER_SPECIFIC_SETTING>-RES_DMD_TRAY = 1.
<WFDSS_UI_USER_SPECIFIC_SETTING>-DEMAND_TRAY = 1.
<WFDSS_UI_USER_SPECIFIC_SETTING>-DMD_RES_TRAY = 1.
<WFDSS_UI_USER_SPECIFIC_SETTING>-ASG_DMD_TRAY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFDSS_UI_USER_SPECIFIC_SETTING-ASG_RES_TRAY, sy-vline,
  WA_WFDSS_UI_USER_SPECIFIC_SETTING-ASSIGNMENT_TRAY, sy-vline,
  WA_WFDSS_UI_USER_SPECIFIC_SETTING-TIMESPEC_TRAY, sy-vline,
  WA_WFDSS_UI_USER_SPECIFIC_SETTING-REF_TIME_ZONE, sy-vline,
  WA_WFDSS_UI_USER_SPECIFIC_SETTING-REF_TIME_UNIT, sy-vline,
  WA_WFDSS_UI_USER_SPECIFIC_SETTING-REF_LENGTH_UNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFDSS_UI_USER_SPECIFIC_SETTING 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_USER_SPECIFIC_SETTING 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_USER_SPECIFIC_SETTING INTO WA_WFDSS_UI_USER_SPECIFIC_SETTING.


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

*Conversion exit CUNIT, internal->external for field REF_LENGTH_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WFDSS_UI_USER_SPECIFIC_SETTING-REF_LENGTH_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFDSS_UI_USER_SPECIFIC_SETTING-REF_LENGTH_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_USER_SPECIFIC_SETTING_STR, 
RESOURCE_TRAY TYPE STRING,
RES_DMD_TRAY TYPE STRING,
DEMAND_TRAY TYPE STRING,
DMD_RES_TRAY TYPE STRING,
ASG_DMD_TRAY TYPE STRING,
ASG_RES_TRAY TYPE STRING,
ASSIGNMENT_TRAY TYPE STRING,
TIMESPEC_TRAY TYPE STRING,
REF_TIME_ZONE TYPE STRING,
REF_TIME_UNIT TYPE STRING,
REF_LENGTH_UNIT TYPE STRING,
CLOSE_AFTER_SEARCH TYPE STRING,
DEMANDS_ON_TOP TYPE STRING,
FIRST_WEEKDAY TYPE STRING,
DAYS_PER_WEEK TYPE STRING,
RESOURCE_VARIANT TYPE STRING,
DEMAND_VARIANT TYPE STRING,
DEF_RES_VIEW TYPE STRING,
UI_STRUCTURE TYPE STRING,
STAFF_FIELD_CM TYPE STRING,
STAFF_FIELD_SM TYPE STRING,
LOG_TRAY TYPE STRING,
CAN_TRAY TYPE STRING,
ASSIGNMENT_STATE TYPE STRING,
STAFF_TRAY TYPE STRING,
STRATEGY TYPE STRING,
SNAPPING_ACTIVE TYPE STRING,
SNAPPING_GRID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFDSS_UI_USER_SPECIFIC_SETTING_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_USER_SPECIFIC_SETTING_STR-RESOURCE_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-RES_DMD_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-DEMAND_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-DMD_RES_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-ASG_DMD_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-ASG_RES_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-ASSIGNMENT_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-TIMESPEC_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-REF_TIME_ZONE sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-REF_TIME_UNIT sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-REF_LENGTH_UNIT sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-CLOSE_AFTER_SEARCH sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-DEMANDS_ON_TOP sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-FIRST_WEEKDAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-DAYS_PER_WEEK sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-RESOURCE_VARIANT sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-DEMAND_VARIANT sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-DEF_RES_VIEW sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-UI_STRUCTURE sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-STAFF_FIELD_CM sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-STAFF_FIELD_SM sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-LOG_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-CAN_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-ASSIGNMENT_STATE sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-STAFF_TRAY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-STRATEGY sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-SNAPPING_ACTIVE sy-vline 
WA_WFDSS_UI_USER_SPECIFIC_SETTING_STR-SNAPPING_GRID sy-vline      INTO ld_text SEPARATED BY SPACE.

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