ABAP Select data from SAP table WFD_ASSGMTDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFD_ASSGMTDET
*  INTO TABLE @DATA(IT_WFD_ASSGMTDET2).
*--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_WFD_ASSGMTDET INDEX 1 INTO DATA(WA_WFD_ASSGMTDET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFD_ASSGMTDET>-MANDT = 1.
<WFD_ASSGMTDET>-WORKFORCEASSIGNMENTID = 1.
<WFD_ASSGMTDET>-WORKFORCEASSGMTSTARTDATE = 1.
<WFD_ASSGMTDET>-WORKFORCEASSGMTENDDATE = 1.
<WFD_ASSGMTDET>-EMPLOYMENTSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFD_ASSGMTDET-EMPLOYMENTPERCENT, sy-vline,
  WA_WFD_ASSGMTDET-COMPANYCODE, sy-vline,
  WA_WFD_ASSGMTDET-COSTCENTER, sy-vline,
  WA_WFD_ASSGMTDET-CONTROLLINGAREA, sy-vline,
  WA_WFD_ASSGMTDET-WEEKLYWORKINGHOURS, sy-vline,
  WA_WFD_ASSGMTDET-WEEKLYWORKINGDAYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFD_ASSGMTDET 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_WFD_ASSGMTDET 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_WFD_ASSGMTDET INTO WA_WFD_ASSGMTDET.


*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 COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WFD_ASSGMTDET-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFD_ASSGMTDET-COSTCENTER.
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_WFD_ASSGMTDET_STR, 
MANDT TYPE STRING,
WORKFORCEASSIGNMENTID TYPE STRING,
WORKFORCEASSGMTSTARTDATE TYPE STRING,
WORKFORCEASSGMTENDDATE TYPE STRING,
EMPLOYMENTSTATUS TYPE STRING,
EMPLOYMENTPERCENT TYPE STRING,
COMPANYCODE TYPE STRING,
COSTCENTER TYPE STRING,
CONTROLLINGAREA TYPE STRING,
WEEKLYWORKINGHOURS TYPE STRING,
WEEKLYWORKINGDAYS TYPE STRING,
JOBTITLE TYPE STRING,
JOBCODE TYPE STRING,
MANAGERASSIGNMENTID TYPE STRING,
COUNTRYISOCODE TYPE STRING,
MANAGEREXTERNALASSIGNMENTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFD_ASSGMTDET_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_WFD_ASSGMTDET_STR-MANDT sy-vline 
WA_WFD_ASSGMTDET_STR-WORKFORCEASSIGNMENTID sy-vline 
WA_WFD_ASSGMTDET_STR-WORKFORCEASSGMTSTARTDATE sy-vline 
WA_WFD_ASSGMTDET_STR-WORKFORCEASSGMTENDDATE sy-vline 
WA_WFD_ASSGMTDET_STR-EMPLOYMENTSTATUS sy-vline 
WA_WFD_ASSGMTDET_STR-EMPLOYMENTPERCENT sy-vline 
WA_WFD_ASSGMTDET_STR-COMPANYCODE sy-vline 
WA_WFD_ASSGMTDET_STR-COSTCENTER sy-vline 
WA_WFD_ASSGMTDET_STR-CONTROLLINGAREA sy-vline 
WA_WFD_ASSGMTDET_STR-WEEKLYWORKINGHOURS sy-vline 
WA_WFD_ASSGMTDET_STR-WEEKLYWORKINGDAYS sy-vline 
WA_WFD_ASSGMTDET_STR-JOBTITLE sy-vline 
WA_WFD_ASSGMTDET_STR-JOBCODE sy-vline 
WA_WFD_ASSGMTDET_STR-MANAGERASSIGNMENTID sy-vline 
WA_WFD_ASSGMTDET_STR-COUNTRYISOCODE sy-vline 
WA_WFD_ASSGMTDET_STR-MANAGEREXTERNALASSIGNMENTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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