ABAP Select data from SAP table V_DFCU30B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_DFCU30B 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 V_DFCU30B. 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 V_DFCU30B 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_V_DFCU30B TYPE STANDARD TABLE OF V_DFCU30B,
      WA_V_DFCU30B TYPE V_DFCU30B,
      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: <V_DFCU30B> TYPE V_DFCU30B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_DFCU30B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_DFCU30B
  INTO TABLE IT_V_DFCU30B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_DFCU30B
*  INTO TABLE @DATA(IT_V_DFCU30B2).
*--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_V_DFCU30B INDEX 1 INTO DATA(WA_V_DFCU30B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_DFCU30B ASSIGNING <V_DFCU30B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_DFCU30B>-MANDT = 1.
<V_DFCU30B>-SCLASS = 1.
<V_DFCU30B>-RKEY1 = 1.
<V_DFCU30B>-RKEY2 = 1.
<V_DFCU30B>-SINSTRUMNT = 1.

ENDLOOP.

LOOP AT IT_V_DFCU30B INTO WA_V_DFCU30B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_DFCU30B-RFEEDNAME, sy-vline,
  WA_V_DFCU30B-RZUSATZ, sy-vline,
  WA_V_DFCU30B-RREMARK, sy-vline,
  WA_V_DFCU30B-RINID1, sy-vline,
  WA_V_DFCU30B-RINID2, sy-vline,
  WA_V_DFCU30B-SPRPTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_DFCU30B 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_V_DFCU30B 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_V_DFCU30B INTO WA_V_DFCU30B.


*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_V_DFCU30B_STR, 
MANDT TYPE STRING,
SCLASS TYPE STRING,
RKEY1 TYPE STRING,
RKEY2 TYPE STRING,
SINSTRUMNT TYPE STRING,
RFEEDNAME TYPE STRING,
RZUSATZ TYPE STRING,
RREMARK TYPE STRING,
RINID1 TYPE STRING,
RINID2 TYPE STRING,
SPRPTY TYPE STRING,
FFACT TYPE STRING,
TFACT TYPE STRING,
RUPDHIST TYPE STRING,
CHGNAME TYPE STRING,
CHGDATE TYPE STRING,
REALTIME TYPE STRING,
LIMIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_DFCU30B_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_V_DFCU30B_STR-MANDT sy-vline 
WA_V_DFCU30B_STR-SCLASS sy-vline 
WA_V_DFCU30B_STR-RKEY1 sy-vline 
WA_V_DFCU30B_STR-RKEY2 sy-vline 
WA_V_DFCU30B_STR-SINSTRUMNT sy-vline 
WA_V_DFCU30B_STR-RFEEDNAME sy-vline 
WA_V_DFCU30B_STR-RZUSATZ sy-vline 
WA_V_DFCU30B_STR-RREMARK sy-vline 
WA_V_DFCU30B_STR-RINID1 sy-vline 
WA_V_DFCU30B_STR-RINID2 sy-vline 
WA_V_DFCU30B_STR-SPRPTY sy-vline 
WA_V_DFCU30B_STR-FFACT sy-vline 
WA_V_DFCU30B_STR-TFACT sy-vline 
WA_V_DFCU30B_STR-RUPDHIST sy-vline 
WA_V_DFCU30B_STR-CHGNAME sy-vline 
WA_V_DFCU30B_STR-CHGDATE sy-vline 
WA_V_DFCU30B_STR-REALTIME sy-vline 
WA_V_DFCU30B_STR-LIMIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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