ABAP Select data from SAP table WCFV_DLC_DESIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCFV_DLC_DESIG
*  INTO TABLE @DATA(IT_WCFV_DLC_DESIG2).
*--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_WCFV_DLC_DESIG INDEX 1 INTO DATA(WA_WCFV_DLC_DESIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCFV_DLC_DESIG>-CLIENT = 1.
<WCFV_DLC_DESIG>-OBJECT_TYPE = 1.
<WCFV_DLC_DESIG>-DSGN_OBJECT = 1.
<WCFV_DLC_DESIG>-ATTR_NAME_BOL = 1.
<WCFV_DLC_DESIG>-HIDDEN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCFV_DLC_DESIG-MANDATORY, sy-vline,
  WA_WCFV_DLC_DESIG-DISABLED, sy-vline,
  WA_WCFV_DLC_DESIG-DEFAULT_VALUE, sy-vline,
  WA_WCFV_DLC_DESIG-EXCLUDED, sy-vline,
  WA_WCFV_DLC_DESIG-F4_FROM_DDIC, sy-vline,
  WA_WCFV_DLC_DESIG-FIELD_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCFV_DLC_DESIG 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_WCFV_DLC_DESIG 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_WCFV_DLC_DESIG INTO WA_WCFV_DLC_DESIG.


*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_WCFV_DLC_DESIG_STR, 
CLIENT TYPE STRING,
OBJECT_TYPE TYPE STRING,
DSGN_OBJECT TYPE STRING,
ATTR_NAME_BOL TYPE STRING,
HIDDEN TYPE STRING,
MANDATORY TYPE STRING,
DISABLED TYPE STRING,
DEFAULT_VALUE TYPE STRING,
EXCLUDED TYPE STRING,
F4_FROM_DDIC TYPE STRING,
FIELD_TYPE TYPE STRING,
BOL_ATTR TYPE STRING,
BOL_OBJECT TYPE STRING,
ACTION_PROV_ID TYPE STRING,
ACTION_RELATION TYPE STRING,
GET_METHOD TYPE STRING,
SET_METHOD TYPE STRING,
GET_I_METHOD TYPE STRING,
GET_A_METHOD TYPE STRING,
GET_V_METHOD TYPE STRING,
GET_P_METHOD TYPE STRING,
HANDLER_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCFV_DLC_DESIG_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_WCFV_DLC_DESIG_STR-CLIENT sy-vline 
WA_WCFV_DLC_DESIG_STR-OBJECT_TYPE sy-vline 
WA_WCFV_DLC_DESIG_STR-DSGN_OBJECT sy-vline 
WA_WCFV_DLC_DESIG_STR-ATTR_NAME_BOL sy-vline 
WA_WCFV_DLC_DESIG_STR-HIDDEN sy-vline 
WA_WCFV_DLC_DESIG_STR-MANDATORY sy-vline 
WA_WCFV_DLC_DESIG_STR-DISABLED sy-vline 
WA_WCFV_DLC_DESIG_STR-DEFAULT_VALUE sy-vline 
WA_WCFV_DLC_DESIG_STR-EXCLUDED sy-vline 
WA_WCFV_DLC_DESIG_STR-F4_FROM_DDIC sy-vline 
WA_WCFV_DLC_DESIG_STR-FIELD_TYPE sy-vline 
WA_WCFV_DLC_DESIG_STR-BOL_ATTR sy-vline 
WA_WCFV_DLC_DESIG_STR-BOL_OBJECT sy-vline 
WA_WCFV_DLC_DESIG_STR-ACTION_PROV_ID sy-vline 
WA_WCFV_DLC_DESIG_STR-ACTION_RELATION sy-vline 
WA_WCFV_DLC_DESIG_STR-GET_METHOD sy-vline 
WA_WCFV_DLC_DESIG_STR-SET_METHOD sy-vline 
WA_WCFV_DLC_DESIG_STR-GET_I_METHOD sy-vline 
WA_WCFV_DLC_DESIG_STR-GET_A_METHOD sy-vline 
WA_WCFV_DLC_DESIG_STR-GET_V_METHOD sy-vline 
WA_WCFV_DLC_DESIG_STR-GET_P_METHOD sy-vline 
WA_WCFV_DLC_DESIG_STR-HANDLER_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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