ABAP Select data from SAP table TDCLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDCLD
*  INTO TABLE @DATA(IT_TDCLD2).
*--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_TDCLD INDEX 1 INTO DATA(WA_TDCLD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDCLD>-DOKCLASS = 1.
<TDCLD>-DOKEDICL = 1.
<TDCLD>-DOKPARCL = 1.
<TDCLD>-DOKNAMLE = 1.
<TDCLD>-DOKLTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDCLD-DOKGLILI, sy-vline,
  WA_TDCLD-DOKTRANS, sy-vline,
  WA_TDCLD-DOKAUTHO, sy-vline,
  WA_TDCLD-DOKMAINT, sy-vline,
  WA_TDCLD-DOKMAINE, sy-vline,
  WA_TDCLD-DOKMODAU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDCLD 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_TDCLD 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_TDCLD INTO WA_TDCLD.


*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_TDCLD_STR, 
DOKCLASS TYPE STRING,
DOKEDICL TYPE STRING,
DOKPARCL TYPE STRING,
DOKNAMLE TYPE STRING,
DOKLTYPE TYPE STRING,
DOKGLILI TYPE STRING,
DOKTRANS TYPE STRING,
DOKAUTHO TYPE STRING,
DOKMAINT TYPE STRING,
DOKMAINE TYPE STRING,
DOKMODAU TYPE STRING,
DOKPGMID TYPE STRING,
DOKOBJECT TYPE STRING,
DOKMAINI TYPE STRING,
DOKNODOCU TYPE STRING,
DOKLENGTH1 TYPE STRING,
DOKLENGTH2 TYPE STRING,
DOKUTOOL TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
DOKU_LINK TYPE STRING,
ATTR_CLASS TYPE STRING,
TLOGO_OBJ TYPE STRING,
VALUE_HELP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDCLD_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_TDCLD_STR-DOKCLASS sy-vline 
WA_TDCLD_STR-DOKEDICL sy-vline 
WA_TDCLD_STR-DOKPARCL sy-vline 
WA_TDCLD_STR-DOKNAMLE sy-vline 
WA_TDCLD_STR-DOKLTYPE sy-vline 
WA_TDCLD_STR-DOKGLILI sy-vline 
WA_TDCLD_STR-DOKTRANS sy-vline 
WA_TDCLD_STR-DOKAUTHO sy-vline 
WA_TDCLD_STR-DOKMAINT sy-vline 
WA_TDCLD_STR-DOKMAINE sy-vline 
WA_TDCLD_STR-DOKMODAU sy-vline 
WA_TDCLD_STR-DOKPGMID sy-vline 
WA_TDCLD_STR-DOKOBJECT sy-vline 
WA_TDCLD_STR-DOKMAINI sy-vline 
WA_TDCLD_STR-DOKNODOCU sy-vline 
WA_TDCLD_STR-DOKLENGTH1 sy-vline 
WA_TDCLD_STR-DOKLENGTH2 sy-vline 
WA_TDCLD_STR-DOKUTOOL sy-vline 
WA_TDCLD_STR-PGMID sy-vline 
WA_TDCLD_STR-OBJECT sy-vline 
WA_TDCLD_STR-DOKU_LINK sy-vline 
WA_TDCLD_STR-ATTR_CLASS sy-vline 
WA_TDCLD_STR-TLOGO_OBJ sy-vline 
WA_TDCLD_STR-VALUE_HELP sy-vline      INTO ld_text SEPARATED BY SPACE.

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