ABAP Select data from SAP table WCCO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCCO
*  INTO TABLE @DATA(IT_WCCO2).
*--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_WCCO INDEX 1 INTO DATA(WA_WCCO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCCO>-MANDT = 1.
<WCCO>-IWERK = 1.
<WCCO>-OBJART = 1.
<WCCO>-OBJTYP = 1.
<WCCO>-CROBJFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCCO-CHOBJFLG, sy-vline,
  WA_WCCO-ASGNFLG, sy-vline,
  WA_WCCO-DIRECTION, sy-vline,
  WA_WCCO-CRTCODE, sy-vline,
  WA_WCCO-CHTCODE, sy-vline,
  WA_WCCO-DPTCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCCO 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_WCCO 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_WCCO INTO WA_WCCO.


*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_WCCO_STR, 
MANDT TYPE STRING,
IWERK TYPE STRING,
OBJART TYPE STRING,
OBJTYP TYPE STRING,
CROBJFLG TYPE STRING,
CHOBJFLG TYPE STRING,
ASGNFLG TYPE STRING,
DIRECTION TYPE STRING,
CRTCODE TYPE STRING,
CHTCODE TYPE STRING,
DPTCODE TYPE STRING,
SETCODE TYPE STRING,
PRIOTYP TYPE STRING,
NR_OBJECT TYPE STRING,
INT_RANGE TYPE STRING,
EXT_RANGE TYPE STRING,
PARGR TYPE STRING,
STSMA TYPE STRING,
CATTYP1 TYPE STRING,
CATLST1 TYPE STRING,
CATTYP2 TYPE STRING,
CATLST2 TYPE STRING,
CATPROFILE TYPE STRING,
BOR_OBJTYP TYPE STRING,
POPUPFLG TYPE STRING,
WCMUSE TYPE STRING,
REFBLSTGRP TYPE STRING,
REFBLTLGRP TYPE STRING,
GENREFART TYPE STRING,
GENREFTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCCO_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_WCCO_STR-MANDT sy-vline 
WA_WCCO_STR-IWERK sy-vline 
WA_WCCO_STR-OBJART sy-vline 
WA_WCCO_STR-OBJTYP sy-vline 
WA_WCCO_STR-CROBJFLG sy-vline 
WA_WCCO_STR-CHOBJFLG sy-vline 
WA_WCCO_STR-ASGNFLG sy-vline 
WA_WCCO_STR-DIRECTION sy-vline 
WA_WCCO_STR-CRTCODE sy-vline 
WA_WCCO_STR-CHTCODE sy-vline 
WA_WCCO_STR-DPTCODE sy-vline 
WA_WCCO_STR-SETCODE sy-vline 
WA_WCCO_STR-PRIOTYP sy-vline 
WA_WCCO_STR-NR_OBJECT sy-vline 
WA_WCCO_STR-INT_RANGE sy-vline 
WA_WCCO_STR-EXT_RANGE sy-vline 
WA_WCCO_STR-PARGR sy-vline 
WA_WCCO_STR-STSMA sy-vline 
WA_WCCO_STR-CATTYP1 sy-vline 
WA_WCCO_STR-CATLST1 sy-vline 
WA_WCCO_STR-CATTYP2 sy-vline 
WA_WCCO_STR-CATLST2 sy-vline 
WA_WCCO_STR-CATPROFILE sy-vline 
WA_WCCO_STR-BOR_OBJTYP sy-vline 
WA_WCCO_STR-POPUPFLG sy-vline 
WA_WCCO_STR-WCMUSE sy-vline 
WA_WCCO_STR-REFBLSTGRP sy-vline 
WA_WCCO_STR-REFBLTLGRP sy-vline 
WA_WCCO_STR-GENREFART sy-vline 
WA_WCCO_STR-GENREFTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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