ABAP Select data from SAP table DF40D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DF40D 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 DF40D. 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 DF40D 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_DF40D TYPE STANDARD TABLE OF DF40D,
      WA_DF40D TYPE DF40D,
      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: <DF40D> TYPE DF40D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DF40D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DF40D
  INTO TABLE IT_DF40D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DF40D
*  INTO TABLE @DATA(IT_DF40D2).
*--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_DF40D INDEX 1 INTO DATA(WA_DF40D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DF40D ASSIGNING <DF40D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DF40D>-PARENT_TYP = 1.
<DF40D>-PARENT_OBJ = 1.
<DF40D>-AS4LOCAL = 1.
<DF40D>-MODEL_TYP = 1.
<DF40D>-FSTUSER = 1.

ENDLOOP.

LOOP AT IT_DF40D INTO WA_DF40D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DF40D-FSTDATE, sy-vline,
  WA_DF40D-FSTTIME, sy-vline,
  WA_DF40D-LSTUSER, sy-vline,
  WA_DF40D-LSTDATE, sy-vline,
  WA_DF40D-LSTTIME, sy-vline,
  WA_DF40D-REL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DF40D 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_DF40D 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_DF40D INTO WA_DF40D.


*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.

*Conversion exit RELE, internal->external for field REL
CALL FUNCTION 'CONVERSION_EXIT_RELE_OUTPUT'
  EXPORTING
    input =                      WA_DF40D-REL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DF40D-REL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RELE, internal->external for field LSTREL
CALL FUNCTION 'CONVERSION_EXIT_RELE_OUTPUT'
  EXPORTING
    input =                      WA_DF40D-LSTREL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DF40D-LSTREL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RELE, internal->external for field API_VER
CALL FUNCTION 'CONVERSION_EXIT_RELE_OUTPUT'
  EXPORTING
    input =                      WA_DF40D-API_VER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DF40D-API_VER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DF40D_STR, 
PARENT_TYP TYPE STRING,
PARENT_OBJ TYPE STRING,
AS4LOCAL TYPE STRING,
MODEL_TYP TYPE STRING,
FSTUSER TYPE STRING,
FSTDATE TYPE STRING,
FSTTIME TYPE STRING,
LSTUSER TYPE STRING,
LSTDATE TYPE STRING,
LSTTIME TYPE STRING,
REL TYPE STRING,
VFUNC TYPE STRING,
VPROC TYPE STRING,
VORGA TYPE STRING,
VINFO TYPE STRING,
VCOMM TYPE STRING,
VFALE TYPE STRING,
LSTREL TYPE STRING,
VFUNR TYPE STRING,
VARTYPE TYPE STRING,
API_VER TYPE STRING,
STATUS TYPE STRING,
IDENT TYPE STRING,
TSTAMP TYPE STRING,
STRUCT_ID TYPE STRING,
NODE_ID TYPE STRING,
COMP_OBJ TYPE STRING,
SYNCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DF40D_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_DF40D_STR-PARENT_TYP sy-vline 
WA_DF40D_STR-PARENT_OBJ sy-vline 
WA_DF40D_STR-AS4LOCAL sy-vline 
WA_DF40D_STR-MODEL_TYP sy-vline 
WA_DF40D_STR-FSTUSER sy-vline 
WA_DF40D_STR-FSTDATE sy-vline 
WA_DF40D_STR-FSTTIME sy-vline 
WA_DF40D_STR-LSTUSER sy-vline 
WA_DF40D_STR-LSTDATE sy-vline 
WA_DF40D_STR-LSTTIME sy-vline 
WA_DF40D_STR-REL sy-vline 
WA_DF40D_STR-VFUNC sy-vline 
WA_DF40D_STR-VPROC sy-vline 
WA_DF40D_STR-VORGA sy-vline 
WA_DF40D_STR-VINFO sy-vline 
WA_DF40D_STR-VCOMM sy-vline 
WA_DF40D_STR-VFALE sy-vline 
WA_DF40D_STR-LSTREL sy-vline 
WA_DF40D_STR-VFUNR sy-vline 
WA_DF40D_STR-VARTYPE sy-vline 
WA_DF40D_STR-API_VER sy-vline 
WA_DF40D_STR-STATUS sy-vline 
WA_DF40D_STR-IDENT sy-vline 
WA_DF40D_STR-TSTAMP sy-vline 
WA_DF40D_STR-STRUCT_ID sy-vline 
WA_DF40D_STR-NODE_ID sy-vline 
WA_DF40D_STR-COMP_OBJ sy-vline 
WA_DF40D_STR-SYNCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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