ABAP Select data from SAP table WCV0C into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WCV0C 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 WCV0C. 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 WCV0C 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_WCV0C TYPE STANDARD TABLE OF WCV0C,
      WA_WCV0C TYPE WCV0C,
      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: <WCV0C> TYPE WCV0C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WCV0C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WCV0C
  INTO TABLE IT_WCV0C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCV0C
*  INTO TABLE @DATA(IT_WCV0C2).
*--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_WCV0C INDEX 1 INTO DATA(WA_WCV0C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WCV0C ASSIGNING <WCV0C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCV0C>-MANDT = 1.
<WCV0C>-TABAREASCRNR = 1.
<WCV0C>-VIEWPROFILE = 1.
<WCV0C>-TABSCRNR = 1.
<WCV0C>-TABNAME = 1.

ENDLOOP.

LOOP AT IT_WCV0C INTO WA_WCV0C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCV0C-VIEWPROFILEX, sy-vline,
  WA_WCV0C-MAXWIDTH, sy-vline,
  WA_WCV0C-DYNTYP, sy-vline,
  WA_WCV0C-DYNWIDTH, sy-vline,
  WA_WCV0C-SCRX, sy-vline,
  WA_WCV0C-REMARK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCV0C 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_WCV0C 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_WCV0C INTO WA_WCV0C.


*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_WCV0C_STR, 
MANDT TYPE STRING,
TABAREASCRNR TYPE STRING,
VIEWPROFILE TYPE STRING,
TABSCRNR TYPE STRING,
TABNAME TYPE STRING,
VIEWPROFILEX TYPE STRING,
MAXWIDTH TYPE STRING,
DYNTYP TYPE STRING,
DYNWIDTH TYPE STRING,
SCRX TYPE STRING,
REMARK TYPE STRING,
TABAREANR TYPE STRING,
SPACEFLG TYPE STRING,
TITLEFLG TYPE STRING,
RIGHTFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCV0C_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_WCV0C_STR-MANDT sy-vline 
WA_WCV0C_STR-TABAREASCRNR sy-vline 
WA_WCV0C_STR-VIEWPROFILE sy-vline 
WA_WCV0C_STR-TABSCRNR sy-vline 
WA_WCV0C_STR-TABNAME sy-vline 
WA_WCV0C_STR-VIEWPROFILEX sy-vline 
WA_WCV0C_STR-MAXWIDTH sy-vline 
WA_WCV0C_STR-DYNTYP sy-vline 
WA_WCV0C_STR-DYNWIDTH sy-vline 
WA_WCV0C_STR-SCRX sy-vline 
WA_WCV0C_STR-REMARK sy-vline 
WA_WCV0C_STR-TABAREANR sy-vline 
WA_WCV0C_STR-SPACEFLG sy-vline 
WA_WCV0C_STR-TITLEFLG sy-vline 
WA_WCV0C_STR-RIGHTFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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