ABAP Select data from SAP table WDFECONTROL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDFECONTROL
*  INTO TABLE @DATA(IT_WDFECONTROL2).
*--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_WDFECONTROL INDEX 1 INTO DATA(WA_WDFECONTROL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDFECONTROL>-RPLID = 1.
<WDFECONTROL>-RPLLOG = 1.
<WDFECONTROL>-WORKITEMS = 1.
<WDFECONTROL>-PACKETSIZE = 1.
<WDFECONTROL>-TOLERANCEPERCENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDFECONTROL-DBUPD, sy-vline,
  WA_WDFECONTROL-ONLINE, sy-vline,
  WA_WDFECONTROL-OUTMINUTE, sy-vline,
  WA_WDFECONTROL-PARALLEL, sy-vline,
  WA_WDFECONTROL-DBLOCK, sy-vline,
  WA_WDFECONTROL-ONLYREQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDFECONTROL 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_WDFECONTROL 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_WDFECONTROL INTO WA_WDFECONTROL.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WDFECONTROL_STR, 
RPLID TYPE STRING,
RPLLOG TYPE STRING,
WORKITEMS TYPE STRING,
PACKETSIZE TYPE STRING,
TOLERANCEPERCENT TYPE STRING,
DBUPD TYPE STRING,
ONLINE TYPE STRING,
OUTMINUTE TYPE STRING,
PARALLEL TYPE STRING,
DBLOCK TYPE STRING,
ONLYREQ TYPE STRING,
ONLYERR TYPE STRING,
ONLYINIT TYPE STRING,
ONLYINITSTATUS TYPE STRING,
CHECKPLANDT TYPE STRING,
CHECKNETCH TYPE STRING,
PLANDATE TYPE STRING,
PLANTIME TYPE STRING,
CHECKDISVF TYPE STRING,
DISVF TYPE STRING,
CHECKVMI TYPE STRING,
DECPOTIME TYPE STRING,
DECMARA TYPE STRING,
DECMARC TYPE STRING,
DEFPLHZ TYPE STRING,
DECSOS TYPE STRING,
DECWBTYP TYPE STRING,
DEFWBTYP TYPE STRING,
DECROUNDP TYPE STRING,
DECINVMNG TYPE STRING,
DECATPQTY TYPE STRING,
CALL_CPROG TYPE STRING,
CALL_TCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDFECONTROL_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_WDFECONTROL_STR-RPLID sy-vline 
WA_WDFECONTROL_STR-RPLLOG sy-vline 
WA_WDFECONTROL_STR-WORKITEMS sy-vline 
WA_WDFECONTROL_STR-PACKETSIZE sy-vline 
WA_WDFECONTROL_STR-TOLERANCEPERCENT sy-vline 
WA_WDFECONTROL_STR-DBUPD sy-vline 
WA_WDFECONTROL_STR-ONLINE sy-vline 
WA_WDFECONTROL_STR-OUTMINUTE sy-vline 
WA_WDFECONTROL_STR-PARALLEL sy-vline 
WA_WDFECONTROL_STR-DBLOCK sy-vline 
WA_WDFECONTROL_STR-ONLYREQ sy-vline 
WA_WDFECONTROL_STR-ONLYERR sy-vline 
WA_WDFECONTROL_STR-ONLYINIT sy-vline 
WA_WDFECONTROL_STR-ONLYINITSTATUS sy-vline 
WA_WDFECONTROL_STR-CHECKPLANDT sy-vline 
WA_WDFECONTROL_STR-CHECKNETCH sy-vline 
WA_WDFECONTROL_STR-PLANDATE sy-vline 
WA_WDFECONTROL_STR-PLANTIME sy-vline 
WA_WDFECONTROL_STR-CHECKDISVF sy-vline 
WA_WDFECONTROL_STR-DISVF sy-vline 
WA_WDFECONTROL_STR-CHECKVMI sy-vline 
WA_WDFECONTROL_STR-DECPOTIME sy-vline 
WA_WDFECONTROL_STR-DECMARA sy-vline 
WA_WDFECONTROL_STR-DECMARC sy-vline 
WA_WDFECONTROL_STR-DEFPLHZ sy-vline 
WA_WDFECONTROL_STR-DECSOS sy-vline 
WA_WDFECONTROL_STR-DECWBTYP sy-vline 
WA_WDFECONTROL_STR-DEFWBTYP sy-vline 
WA_WDFECONTROL_STR-DECROUNDP sy-vline 
WA_WDFECONTROL_STR-DECINVMNG sy-vline 
WA_WDFECONTROL_STR-DECATPQTY sy-vline 
WA_WDFECONTROL_STR-CALL_CPROG sy-vline 
WA_WDFECONTROL_STR-CALL_TCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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