ABAP Select data from SAP table TDP0 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDP0 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 TDP0. 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 TDP0 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_TDP0 TYPE STANDARD TABLE OF TDP0,
      WA_TDP0 TYPE TDP0,
      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: <TDP0> TYPE TDP0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TDP0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TDP0
  INTO TABLE IT_TDP0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDP0
*  INTO TABLE @DATA(IT_TDP02).
*--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_TDP0 INDEX 1 INTO DATA(WA_TDP02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TDP0 ASSIGNING <TDP0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDP0>-MANDT = 1.
<TDP0>-NFELD = 1.
<TDP0>-JSEL = 1.
<TDP0>-JMOD = 1.
<TDP0>-JREF = 1.

ENDLOOP.

LOOP AT IT_TDP0 INTO WA_TDP0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDP0-JSIGN, sy-vline,
  WA_TDP0-RTAB, sy-vline,
  WA_TDP0-RFELD, sy-vline,
  WA_TDP0-SKOART, sy-vline,
  WA_TDP0-RGET, sy-vline,
  WA_TDP0-RSET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDP0 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_TDP0 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_TDP0 INTO WA_TDP0.


*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_TDP0_STR, 
MANDT TYPE STRING,
NFELD TYPE STRING,
JSEL TYPE STRING,
JMOD TYPE STRING,
JREF TYPE STRING,
JSIGN TYPE STRING,
RTAB TYPE STRING,
RFELD TYPE STRING,
SKOART TYPE STRING,
RGET TYPE STRING,
RSET TYPE STRING,
RSGPGM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDP0_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_TDP0_STR-MANDT sy-vline 
WA_TDP0_STR-NFELD sy-vline 
WA_TDP0_STR-JSEL sy-vline 
WA_TDP0_STR-JMOD sy-vline 
WA_TDP0_STR-JREF sy-vline 
WA_TDP0_STR-JSIGN sy-vline 
WA_TDP0_STR-RTAB sy-vline 
WA_TDP0_STR-RFELD sy-vline 
WA_TDP0_STR-SKOART sy-vline 
WA_TDP0_STR-RGET sy-vline 
WA_TDP0_STR-RSET sy-vline 
WA_TDP0_STR-RSGPGM sy-vline      INTO ld_text SEPARATED BY SPACE.

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