ABAP Select data from SAP table WCCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCCR
*  INTO TABLE @DATA(IT_WCCR2).
*--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_WCCR INDEX 1 INTO DATA(WA_WCCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCCR>-MANDT = 1.
<WCCR>-IWERK = 1.
<WCCR>-VALFLG = 1.
<WCCR>-APRVGRPFLG = 1.
<WCCR>-ESFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCCR-WAPVAL, sy-vline,
  WA_WCCR-WAPIVAL, sy-vline,
  WA_WCCR-WCDVAL, sy-vline,
  WA_WCCR-WAPFSELFLG, sy-vline,
  WA_WCCR-WAPIFSELFLG, sy-vline,
  WA_WCCR-WCDFSELFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCCR 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_WCCR 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_WCCR INTO WA_WCCR.


*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_WCCR_STR, 
MANDT TYPE STRING,
IWERK TYPE STRING,
VALFLG TYPE STRING,
APRVGRPFLG TYPE STRING,
ESFLG TYPE STRING,
WAPVAL TYPE STRING,
WAPIVAL TYPE STRING,
WCDVAL TYPE STRING,
WAPFSELFLG TYPE STRING,
WAPIFSELFLG TYPE STRING,
WCDFSELFLG TYPE STRING,
WAPUSFLG TYPE STRING,
WAPIUSFLG TYPE STRING,
WCDUSFLG TYPE STRING,
WAPCTRL TYPE STRING,
WAPICTRL TYPE STRING,
WCDCTRL TYPE STRING,
CMPCTRL TYPE STRING,
WCDTOFLG TYPE STRING,
GENCTRL TYPE STRING,
EXECTL TYPE STRING,
EXECFLG TYPE STRING,
WOCOFLG TYPE STRING,
WAPCLSDFLG TYPE STRING,
WAPICLSDFLG TYPE STRING,
MTCTRL TYPE STRING,
COCTRL TYPE STRING,
TFCTRL TYPE STRING,
TCCTRL TYPE STRING,
UCTRL TYPE STRING,
CCTRL TYPE STRING,
GSYSFLG TYPE STRING,
RFCDEST TYPE STRING,
TAGMTCTRL TYPE STRING,
TESTMTCTRL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCCR_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_WCCR_STR-MANDT sy-vline 
WA_WCCR_STR-IWERK sy-vline 
WA_WCCR_STR-VALFLG sy-vline 
WA_WCCR_STR-APRVGRPFLG sy-vline 
WA_WCCR_STR-ESFLG sy-vline 
WA_WCCR_STR-WAPVAL sy-vline 
WA_WCCR_STR-WAPIVAL sy-vline 
WA_WCCR_STR-WCDVAL sy-vline 
WA_WCCR_STR-WAPFSELFLG sy-vline 
WA_WCCR_STR-WAPIFSELFLG sy-vline 
WA_WCCR_STR-WCDFSELFLG sy-vline 
WA_WCCR_STR-WAPUSFLG sy-vline 
WA_WCCR_STR-WAPIUSFLG sy-vline 
WA_WCCR_STR-WCDUSFLG sy-vline 
WA_WCCR_STR-WAPCTRL sy-vline 
WA_WCCR_STR-WAPICTRL sy-vline 
WA_WCCR_STR-WCDCTRL sy-vline 
WA_WCCR_STR-CMPCTRL sy-vline 
WA_WCCR_STR-WCDTOFLG sy-vline 
WA_WCCR_STR-GENCTRL sy-vline 
WA_WCCR_STR-EXECTL sy-vline 
WA_WCCR_STR-EXECFLG sy-vline 
WA_WCCR_STR-WOCOFLG sy-vline 
WA_WCCR_STR-WAPCLSDFLG sy-vline 
WA_WCCR_STR-WAPICLSDFLG sy-vline 
WA_WCCR_STR-MTCTRL sy-vline 
WA_WCCR_STR-COCTRL sy-vline 
WA_WCCR_STR-TFCTRL sy-vline 
WA_WCCR_STR-TCCTRL sy-vline 
WA_WCCR_STR-UCTRL sy-vline 
WA_WCCR_STR-CCTRL sy-vline 
WA_WCCR_STR-GSYSFLG sy-vline 
WA_WCCR_STR-RFCDEST sy-vline 
WA_WCCR_STR-TAGMTCTRL sy-vline 
WA_WCCR_STR-TESTMTCTRL sy-vline      INTO ld_text SEPARATED BY SPACE.

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