ABAP Select data from SAP table WORKFLDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WORKFLDS
*  INTO TABLE @DATA(IT_WORKFLDS2).
*--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_WORKFLDS INDEX 1 INTO DATA(WA_WORKFLDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WORKFLDS>-GKDAY = 1.
<WORKFLDS>-DISPL = 1.
<WORKFLDS>-YEARN = 1.
<WORKFLDS>-MONTH = 1.
<WORKFLDS>-WEDAY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WORKFLDS-MODAY, sy-vline,
  WA_WORKFLDS-WKDAY, sy-vline,
  WA_WORKFLDS-CALID, sy-vline,
  WA_WORKFLDS-INDEX, sy-vline,
  WA_WORKFLDS-CLINE, sy-vline,
  WA_WORKFLDS-FNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WORKFLDS 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_WORKFLDS 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_WORKFLDS INTO WA_WORKFLDS.


*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 GJAHR, internal->external for field YEARN
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WORKFLDS-YEARN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WORKFLDS-YEARN.
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_WORKFLDS_STR, 
GKDAY TYPE STRING,
DISPL TYPE STRING,
YEARN TYPE STRING,
MONTH TYPE STRING,
WEDAY TYPE STRING,
MODAY TYPE STRING,
WKDAY TYPE STRING,
CALID TYPE STRING,
INDEX TYPE STRING,
CLINE TYPE STRING,
FNAME TYPE STRING,
STATU TYPE STRING,
XCODE TYPE STRING,
WEEKN TYPE STRING,
HIDENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WORKFLDS_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_WORKFLDS_STR-GKDAY sy-vline 
WA_WORKFLDS_STR-DISPL sy-vline 
WA_WORKFLDS_STR-YEARN sy-vline 
WA_WORKFLDS_STR-MONTH sy-vline 
WA_WORKFLDS_STR-WEDAY sy-vline 
WA_WORKFLDS_STR-MODAY sy-vline 
WA_WORKFLDS_STR-WKDAY sy-vline 
WA_WORKFLDS_STR-CALID sy-vline 
WA_WORKFLDS_STR-INDEX sy-vline 
WA_WORKFLDS_STR-CLINE sy-vline 
WA_WORKFLDS_STR-FNAME sy-vline 
WA_WORKFLDS_STR-STATU sy-vline 
WA_WORKFLDS_STR-XCODE sy-vline 
WA_WORKFLDS_STR-WEEKN sy-vline 
WA_WORKFLDS_STR-HIDENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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